Subject: Re: Internet Corrosion Conference - New ASTM Session Just Posted
From: The Silicon Surfer
Date: Sun, 10 Nov 1996 22:38:17 +0000
Dr. R.D. Kane wrote:
>
> InterCorr/96 - The First Global Internet Corrosion Conference. This is
> the first corrosion conference where technical papers are
> presented, published and archived on the Internet. InterCorr/96 is
> pleased to announce the posting of the first technical society session
> sponsored by ASTM entitled, "Corrosion Tests and Standards: Application
> and Interpretation".
>
> These papers will be posted over the period June through February, 1997.
> This innovative format provides for unlimited global access of the
> papers from the InterCorr/96 Web Site:
>
> http://www.clihouston.com
>
> There have been over 730 registrants from over 30 countries worldwide.
> Registration is complimentary provided by the corporate sponsors
> participating in the first Internet Virtual Tradeshow also found on the
> InterCorr/96 Web Site.
>
> Dr. R.D. Kane
>
> --
> CLI International, Inc.
> The Materials & Corrosion Specialists
> http://www.clihouston.com
>
> CLI's New Specialty Equipment Division offers
> Equipment backed by service and experience.
Bit pretentious postic with a title, we can all do it mate, but some of
us aren't peacocks, we are REAL engineers.
later
JB
Subject: Re: Chemical Engineers and Computer Science
From: vosburgh@bigsky.net (mark vosburgh)
Date: Tue, 12 Nov 1996 16:34:33 GMT
gart@atlanta.com (Greg Trollope) wrote:
>On 11/8/96 7:43AM, in message <55v9sk$lcp@bignews.shef.ac.uk>, M J Pitt wrote:
> In article <32816a59.8217033@198.69.186.1>, ngduc@net2.intserv.com says...
> >
> >I' curious about what computer language (Fortran, TurboC++,
> >Pascal,Basic,...) chemical enginners normally use. The college I'm
> >attending, NJIT do not mention about those kinds of things. I'm stuck.
> >Does anybody know somthing about it? Thanks.
Another type of programming used frequently by chemical engineers is
for microprocessor based control systems. While much of the
programming is "fill in the blank" type configuration, vendor specific
code is required for many distributed control systems such as
Honeywell TDC, Bailey, Foxboro etc.
Electrical ladder logic is also very common in industry and is helpful
for process chemical engineers in understanding and operating
processes.
Mark Vosburgh
Subject: Re: Chemical Engineers and Computer Science
From: vosburgh@bigsky.net (mark vosburgh)
Date: Tue, 12 Nov 1996 16:33:38 GMT
gart@atlanta.com (Greg Trollope) wrote:
>On 11/8/96 7:43AM, in message <55v9sk$lcp@bignews.shef.ac.uk>, M J Pitt wrote:
> In article <32816a59.8217033@198.69.186.1>, ngduc@net2.intserv.com says...
> >
> >I' curious about what computer language (Fortran, TurboC++,
> >Pascal,Basic,...) chemical enginners normally use. The college I'm
> >attending, NJIT do not mention about those kinds of things. I'm stuck.
> >Does anybody know somthing about it? Thanks.
Another type of programming used frequently by chemical engineers is
for microprocessor based control systems. While much of the
programming is "fill in the blank" type configuration, vendor specific
code is required for many distributed control systems such as
Honeywell TDC, Bailey, Foxboro etc.
Electrical ladder logic is also very common in industry and is helpful
for process chemical engineers in understanding and operating
processes.
Mark Vosburgh
Subject: Re: Polystyrene Plastics advice needed
From: James Coffey <"jncoffey@worldnet.att.net"@worldnet.att.net>
Date: Tue, 12 Nov 1996 09:55:18 -0600
Try cross posting to sci.polymers. Also, two large
makers of polystyrene are Dow and Huntsman. Call their
customer service departments and ask for R&D.;
Huntsman's phone number is 1-800-221-1788. You'll have
to call information to find a number for Dow.
Steve Turner wrote:
>
> I am trying to spin-cast polystyrene onto a glass or metallic mold
> to make thin films with small-scale structure. I am having
> a problem with the PS cracking when I remove the film from
> the mold. Does anyone know of a plasticizer I can use with
> PS, or a mold release agent that will work with metal or glass?
>
> I am currently using trichloroethylene as a solvent for the
> casting.
>
> I am not dead set on polystyrene, but right now it is the only one I
> have had any success with. Polyethylene would probably be a
> more suitable material, but I have not been able to find a
> suitable solvent for spin-casting. It seems that nothing will
> dissolve it below about 70C, and I don't have a heated spinner.
> Also, I am told that HDPE will not be 100% conformal to the mold
> when the solvent is baked out.
>
> I have thought of chemical vapor deposition techniques
> and plasma deposition, but I don't know anything about
> these.
>
> Any advice would be much appreciated.
>
> Steve Turner
> Department of Physics
> Cornell University
--
James Coffey, P.E.
Chemical Engineer
JNCOFFEY@WORLDNET.ATT.NET (alternate address)
========================
The views expressed above are my own, and have no
connection to my employer.
Subject: Re: Aluminium Chloride - Corrosion "HELP-HELP-HELP!!!"
From: "Stephen L. Gilbert"
Date: Tue, 12 Nov 1996 08:47:50 -0800
ANALYTICAL LABORATORY wrote:
>
> Hi, I hope some one can help me with this question as I have tried before and
> failed.
>
> My question is this:
>
> How corrosive is molten (AlCl3 + NaCl)?. Temp approximatly 400oC. What metal
> casing can with stand it,s corrosive nature?. Does the AlCl3 react with steam
> to produce Al2(OH)3 + HCl?. Does AlCl3 catalyst become deactivated like other
> catalysts and if so how does one reactivate it.
>
> Any solutions to the above problems would be muchly appreciated as I am afraid
> to continue with my work until I am 100% certain of the above question.
>
> Deano.
Semiconductor plasma etching of aluminum interconnection layers by Cl2
containing compounds produced AlCl3. The compound corroded pretty much
everything it came into contact with...and the vacuum pump innards
downstream of the plasma reactor as well. The trick to handle was in two
parts, first keep the system dry...no moisture or water source as your
mix is very hydroscopic...and second to keep the temperature above 80 C
or better for critical components...the vapor pressure is high enough to
keep it in the gas phase and reduce attack.
From your message it appears you don't want to keep it dry, you may be
working in ambient, and your temperature is well above the point were
the vapor pressure is very high....beware !!
--
Stephen L. Gilbert
Consulting Services........"serving the Semiconductor Industry"
3631 N. Hash Knife Circle
Tucson, Arizona 85749
browse http://www.goodnet.com/~conser for more information
please respond by email to;
S.L.Gilbert@ieee.org
Subject: Re: Chemical Engineers and Computer Science
From: vosburgh@bigsky.net (mark vosburgh)
Date: Tue, 12 Nov 1996 17:21:18 GMT
gart@atlanta.com (Greg Trollope) wrote:
>On 11/8/96 7:43AM, in message <55v9sk$lcp@bignews.shef.ac.uk>, M J Pitt wrote:
> In article <32816a59.8217033@198.69.186.1>, ngduc@net2.intserv.com says...
> >
> >I' curious about what computer language (Fortran, TurboC++,
> >Pascal,Basic,...) chemical enginners normally use. The college I'm
> >attending, NJIT do not mention about those kinds of things. I'm stuck.
> >Does anybody know somthing about it? Thanks.
Another type of programming used frequently by chemical engineers is
for microprocessor based control systems. While much of the
programming is "fill in the blank" type configuration, vendor specific
code is required for many distributed control systems such as
Honeywell TDC, Bailey, Foxboro etc.
Electrical ladder logic is also very common in industry and is helpful
for process chemical engineers in understanding and operating
processes.
Mark Vosburgh
Subject: Re: Help with wastewater
From: rtotman@oanet.com (r)
Date: 12 Nov 1996 17:56:36 GMT
In article <328684FE.7CD8@sprintmail.com>, Dave says:
>
>Will someone please point me in the right direction?
> We have a problem with our wastwater effluent. It contains lead, cadmium, zinc, nickel
>and a host of other nasties. We do not want to just dump it. The pollutants are in solid form
>suspended in water. We need a way to get rid of the water & leave the sludge behind & then pay
>to have it shipped off somewhere appropriate. We produce about 100 gallons/week &cant; afford the
>$5000/55gal drum that it would cost to get rid of the whole mess.
> Is this the right NG to post this Q to? Is there another one that might be more
>appropriate?
> Any help or ideas that anyone might have will be appreciated greatly.
> Thanks in advance.
>Dave
>wingnut@sprintmail.com
If the solids are truly in suspension, and not also partly present
as dissolved salts, I would think that some form of filtration, either
gravity or pressure, would separate the solids from the liquid. Alternatively,
a centrifuge could be used to precipitate them rapidly.
Gravity settling followed by decantation of the supernatent liquid might be
possible, especially if you use a flocculating agent to enhance the
precipitation. These agents are very long chain organic polymers that cause
the particles to coalesce and settle more rapidly than they would alone.
They are used in milligram quantities and are quite economic.
If, as I suspect, there are dissolved salts of the metals in the liquid as
well, then the separation will be more difficult. You will need to consult
a chemist who is experienced in that area. Most of the metals you mention
have some sparingly soluble salts, so this form of treatment should not be
that difficult.
When you have a final separation into a wet solid and a harmless liquid,
you may find there is a company who will buy the solid part for metals
recovery. It is certainly worth checking out. It probably means accumulating
a tons or two of the solid to make a worthwhile shipment. Companies like
NL Industries, who are in the lead/zinc/cadmium business, might be
interested.
Subject: Re: Chemical Engineers and Computer Science
From: vosburgh@bigsky.net (mark vosburgh)
Date: Tue, 12 Nov 1996 22:05:24 GMT
gart@atlanta.com (Greg Trollope) wrote:
>On 11/8/96 7:43AM, in message <55v9sk$lcp@bignews.shef.ac.uk>, M J Pitt wrote:
> In article <32816a59.8217033@198.69.186.1>, ngduc@net2.intserv.com says...
> >
> >I' curious about what computer language (Fortran, TurboC++,
> >Pascal,Basic,...) chemical enginners normally use. The college I'm
> >attending, NJIT do not mention about those kinds of things. I'm stuck.
> >Does anybody know somthing about it? Thanks.
Another type of programming used frequently by chemical engineers is
for microprocessor based control systems. While much of the
programming is "fill in the blank" type configuration, vendor specific
code is required for many distributed control systems such as
Honeywell TDC, Bailey, Foxboro etc.
Electrical ladder logic is also very common in industry and is helpful
for process chemical engineers in understanding and operating
processes.
Mark Vosburgh
Subject: Re: Chemical Engineers and Computer Science
From: vosburgh@bigsky.net (mark vosburgh)
Date: Tue, 12 Nov 1996 22:02:23 GMT
gart@atlanta.com (Greg Trollope) wrote:
>On 11/8/96 7:43AM, in message <55v9sk$lcp@bignews.shef.ac.uk>, M J Pitt wrote:
> In article <32816a59.8217033@198.69.186.1>, ngduc@net2.intserv.com says...
> >
> >I' curious about what computer language (Fortran, TurboC++,
> >Pascal,Basic,...) chemical enginners normally use. The college I'm
> >attending, NJIT do not mention about those kinds of things. I'm stuck.
> >Does anybody know somthing about it? Thanks.
Another type of programming used frequently by chemical engineers is
for microprocessor based control systems. While much of the
programming is "fill in the blank" type configuration, vendor specific
code is required for many distributed control systems such as
Honeywell TDC, Bailey, Foxboro etc.
Electrical ladder logic is also very common in industry and is helpful
for process chemical engineers in understanding and operating
processes.
Mark Vosburgh
Subject: [Fwd: Emco Electronics Online]
From: KWA Leaklist
Date: Mon, 11 Nov 1996 22:56:43 -0600
This is a multi-part message in MIME format.
--------------769EC477A3E
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 7bit
--
Jeff Wilcox, Engineer
KEN WILCOX ASSOCIATES, INC.
http://www.kwaleak.com
Phone (816) 443-2494
--------------769EC477A3E
Content-Type: message/rfc822
Content-Transfer-Encoding: 7bit
Content-Disposition: inline
Message-ID: <328800AD.6108@kwaleak.com>
Date: Mon, 11 Nov 1996 22:44:29 -0600
From: KWA Leaklist
Reply-To: leaklist@kwaleak.com
Organization: Ken Wilcox Associates, Inc.
X-Mailer: Mozilla 3.0Gold (Win95; I)
MIME-Version: 1.0
To: leaklist@kwaleak.com
Subject: Emco Electronics Online
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 7bit
Congratulations to Emco Electronics on their decision to post
certifications for the Emco EECO System Series Leak Detectors on the KWA
Website.
Manufacturer: Emco Electronics, A division of Tuthill Corporation
Systems: EECO System ATGS
EECO System Automatic Line Leak Detection System
EECO System Liquid Level Sensors
Available at: http://www.kwaleak.com/emco
--
Jeff Wilcox, Engineer
KEN WILCOX ASSOCIATES, INC.
http://www.kwaleak.com
Phone (816) 443-2494
--------------769EC477A3E--
Subject: Emco Electronics Online
From: KWA Leaklist
Date: Tue, 12 Nov 1996 10:31:52 -0600
Subject: Emco Electronics Online
Date: Mon, 11 Nov 1996 22:44:29 -0600
From: KWA Leaklist
Organization: Ken Wilcox Associates, Inc.
To: leaklist@kwaleak.com
Congratulations to Emco Electronics on their decision to post
certifications for the Emco EECO System Series Leak Detectors on the KWA
Website.
Manufacturer: Emco Electronics, A division of Tuthill Corporation
Systems: EECO System ATGS
EECO System Automatic Line Leak Detection System
EECO System Liquid Level Sensors
Available at: http://www.kwaleak.com/emco
--
Jeff Wilcox, Engineer
KEN WILCOX ASSOCIATES, INC.
http://www.kwaleak.com
Phone (816) 443-2494
Subject: Need to interview chem engrs!
From: maryl@efn.org (Mary Leontovich)
Date: Tue, 12 Nov 1996 14:09:08 -0800
Hi-
I write for an educational magazine that teaches high school students
about different jobs and careers. I'm writing an article about chemical
engineers and need your input. If you can answer these questions and get
back to me by Thursday 11/14, I'd appreciate it.
1. What kind of chemical engineering do you? (keep it simple--this is for
HS kids.) What's your average day like?
2. What do you like best about your job? Least?
3. What advice would you give to students interested in this as a career?
What kind of courses should they take? What kind of skills/ personality
does well in this field? (i.e., like working alone, etc.).
4. Any last words of wisdom/advice/warning about this field?
5. Last, but not least, who are you? Give your name, company, how long
you've been in the field, and a number where I can contact you directly
for follow-up questions.
Thanks!
Mary Leontovich
maryl@efn.org
Subject: Relief Valve Testing
From: Nicol & Associates
Date: Tue, 12 Nov 96 16:43:08 cDT
I am in the natural gas processing plant consulting business and several of
our clients are asking how often they should be testing their releif valves.
For D.O.T. regulated pipelines, we tell them to test annually per D.O.T.
regulations. For boilers, test annually per the boiler code. For other relief
valves such as on process vessels, cooling water systems, fuel gas systems, we
tell them use the manufacturer's recommendations which is generally annual
testing.
Does anyone know of any regulations for natural gas processing plants other
than those mentioned that require relief valve testing?
Thanks,
Jerry Gump
Nicol & Associates
Richardson, Texas
Subject: [Fwd: leak detection equipment and training]
From: KWA Leaklist
Date: Mon, 11 Nov 1996 22:55:45 -0600
This is a multi-part message in MIME format.
--------------526A2303396A
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 7bit
--
Jeff Wilcox, Engineer
KEN WILCOX ASSOCIATES, INC.
http://www.kwaleak.com
Phone (816) 443-2494
--------------526A2303396A
Content-Type: message/rfc822
Content-Transfer-Encoding: 7bit
Content-Disposition: inline
Message-ID: <3287FEF8.70E6@kwaleak.com>
Date: Mon, 11 Nov 1996 22:37:12 -0600
From: KWA Leaklist
Reply-To: leaklist@kwaleak.com
Organization: Ken Wilcox Associates, Inc.
X-Mailer: Mozilla 3.0Gold (Win95; I)
MIME-Version: 1.0
To: leaklist@kwaleak.com
Subject: leak detection equipment and training
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 7bit
Subject: leak detection equipment and training
Date: Mon, 11 Nov 1996 15:56:49 +0000
From: Juan Rudek
To: leak.list@kwaleak.com
Would you be so kind as to send information on leak detection equipment
and training.
Thank you
John Rudek
--------------526A2303396A--
Subject: Aluminum coating quesiton
From: hafshar@aol.com
Date: 12 Nov 1996 23:24:03 GMT
Hello,
1. I followed the following procedure to obtain blue color on aluminum
but was not able to consistantly repeat the results on different runs
under the same conditions. Do you have any recommendations as to why
I have this problem and what I can do to produce consistant results?
H2SO4 Anodizing bath: Wt = 20%, 20degreesC=temp, 15=Vdc, 25minutes,
Lead=Cathode electrode
H3PO4 Anodizing bath: Wt = 10%, Room Temperature, 20=Vac, 2.5minutes,
Lead=Cathode electrode
Coloring Electrolyte: 10g/l SnSo4, pH=1, 15=Vac, 2.5 min,
Stainless Steel=Cathode electrode
- OR-
Coloring Electrolyte: 80g/l NiSO4, pH=1.8, 20=Vac, 20degreesC,
Stainless Steel=Cathode electrode
BO3H3 30g/l
2. What is the suitable sealing solution for blue color on aluminum?
3. What is the optimum condition for green color on
aluminum and sealing solution?
Thank you in advance,
Javad
Subject: Re: Aluminium Chloride - Corrosion "HELP-HELP-HELP!!!"
From: "Jack A. Bush"
Date: Tue, 12 Nov 1996 18:37:44 -0800
I've had a little experience with a polyethylbenzene/AlCl3 complex, and
it's damned near the universal solvent. Even Hastelloy B (C) has a
measurable corrosion rate in it--and that's about the best metal there
is for it.
In answer to your second question, at least in the case of the above
complex, yeah, water, in any phase, kills it--yielding great clouds of
HCl vapor.
Can't really speak to AlCl3/NaCl, but hope this helps.
10/Q,
Jack
ANALYTICAL LABORATORY wrote:
>
> Hi, I hope some one can help me with this question as I have tried before and
> failed.
>
> My question is this:
>
> How corrosive is molten (AlCl3 + NaCl)?. Temp approximatly 400oC. What metal
> casing can with stand it,s corrosive nature?. Does the AlCl3 react with steam
> to produce Al2(OH)3 + HCl?. Does AlCl3 catalyst become deactivated like other
> catalysts and if so how does one reactivate it.
>
> Any solutions to the above problems would be muchly appreciated as I am afraid
> to continue with my work until I am 100% certain of the above question.
>
> Deano.
Subject: Re: Ternary VLE Plots
From: 73623.3437@compuserve.com (Mark J. Potter)
Date: Wed, 13 Nov 1996 03:16:52 GMT
pswett@lynx.dac.neu.edu (Peter A. Swett) wrote:
>I was interested in doing the same thing, UNI* for ternary VLE/LLE,
>with some kind of MATLAB extension to plot the data. I saved this
>posting, but obviously never got around to writing the MATLAB.
>I don't think I ever looked at this URL either...
>>Newsgroups: sci.engr.chem
>>Subject: Re: 3 component phase diagram (triangular graphs)
>>From: t.epperly@ic.ac.uk (Tom Epperly)
>>Date: 02 Feb 1996 10:33:29 GMT
>>I wrote some PostScript code to facilitate the making of trangular
>>graphs. It is available via WWW, or I will send you a copy of e-mail.
>>http://www.ps.ic.ac.uk/~epperly/triangle.ps England
>>http://osnome.che.wisc.edu/~epperly/triangle.ps Wisconsin, U.S.A.
>>
>>You don't need to understand PostScript to use this, but you will need
>>to edit the file. To find where your data should go search for the
>>string "% EXAMPLE DATA" which appears at the bottom of the file.
>>
>>This PostScript program only plots points (circles, squares,
>>triangles). It doesn't draw lines or curves of best fit.
>>
>> Tom
>>--
>>-------------------------------------------------------------------------------
>>Tom Epperly Centre for Process Systems Engineering Imperial College
>>C619 Roderic Hill Building, Prince Consort Road, London, SW7 2BY, ENGLAND
>>Phone: 44 171 594 6617 FAX: 44 171 594 6606 Email: t.epperly@ic.ac.uk
>>http://www.ps.ic.ac.uk/~epperly/ http://www.ps.ic.ac.uk/~epperly/Resume.html
>>-------------------------------------------------------------------------------
>I'd be interested to know what you finally end up doing. I think in
>the age of Excel and XY plotting you will see more right triangle
>diagrams unless somebody makes reasonably public a readily available
>tool to do otherwise (if of course it doesn't already)
>Peter A. Swett
>BS ChE '97 Northeastern University Boston MA
>pswett@lynx.dac.neu.edu
Thanks for the offer, Peter, but we don't have a PS printer anywhere.
Just Laser-Jet IIIs. Like I said, real tight budget. I do have an
Epson Stylus Color at home.
Regards
Mark J. Potter, P.E.
Houston, TX
Subject: Re: Relief Valve Testing
From: lga@tiac.net (George Randall)
Date: Wed, 13 Nov 1996 03:36:18 GMT
Nicol & Associates wrote:
>I am in the natural gas processing plant consulting business and several of
>our clients are asking how often they should be testing their releif valves.
>For D.O.T. regulated pipelines, we tell them to test annually per D.O.T.
>regulations. For boilers, test annually per the boiler code. For other relief
>valves such as on process vessels, cooling water systems, fuel gas systems, we
>tell them use the manufacturer's recommendations which is generally annual
>testing.
>Does anyone know of any regulations for natural gas processing plants other
>than those mentioned that require relief valve testing?
Two related examples from NFPA standards:
NFPA 58 (Storage and handling of LPG) 1995: In its non-mandatory
Appendix, it says "Frequent testing of pressure relief valves on
LP-gas containers is not considered necessary for the following
reasons:" and (paraphrasing) says that the product is non-corrosive;
the valves are corrosion-resistant; atmospheric variations are
insufficient to cause permanent set in the springs; odorization means
that leaks are readily apparent; and experience shows that LPG safety
valves have a good record of functioning.
NFPA 59 (LP-Gases at Utility Gas Plants) 1992: Relief devices
shall be tested for proper operation at intervals not exceeding
five years.
It helps to have a code or regulation to rely on, but I suspect
that a lot more accidents have resulting from operational
errors than from relief valves that failed to operate when
called upon.
George
============================================
George A. Randall, P.E. lga@tiac.net
LGA Engineering Newburyport Mass USA
============================================
Subject: Re: Help with wastewater
From: hdanberg@aol.com
Date: 13 Nov 1996 06:34:55 GMT
Dave, wingnut@sprintmail.com wrties:
"Will someone please point me in the right direction?
We have a problem with our wastwater effluent. It contains lead,
cadmium, zinc, nickel
and a host of other nasties. We do not want to just dump it. The
pollutants are in solid form
suspended in water. We need a way to get rid of the water & leave the
sludge behind & then pay
to have it shipped off somewhere appropriate. We produce about 100
gallons/week &cant; afford the
$5000/55gal drum that it would cost to get rid of the whole mess.
Is this the right NG to post this Q to? Is there another one that
might be more
appropriate?
Any help or ideas that anyone might have will be appreciated
greatly.
Thanks in advance."
If it truly a solid, filtration or some type of precipitation/floculation
reaction should get it out. If there are dissolved metals a well, you may
want to consider getting an evaporator to boil off the water and leave a
much lower volume of solid for disposal.
If you do not have the expertise or desire to do the researcha nd
engineering yourself, you sould be able to find a local consultant that
can help you for $75-100/hour. They can help you select the best process
and find vendors, etc.
As an altenative, you may want to contact the local environmental
agencies. Many of them have outreach offices to help businesses solve
problems llike this one (put your tax dollars to work helping you).
I used to consult in this area but unless you are local, I can't help you
effectively.
Best of luck,
Harry Danberg
Subject: Re: Chemical Engineers and Computer Science
From: "Dmitry V. Saulin"
Date: Wed, 13 Nov 96 10:55:44 +0500
Autor of article <32816a59.8217033@198.69.186.1> wrote:
> I' curious about what computer language (Fortran, TurboC++,
> Pascal,Basic,...) chemical enginners normally use. The college I'm
> attending, NJIT do not mention about those kinds of things. I'm stuck.
> Does anybody know somthing about it? Thanks.
I work at Perm State Technical Univ. (Perm city, Russia, West Ural) at
Chemical Engineering Dept. as a teacher. "Computer Calculation for
Chemical Engineering" is my course (for 4 and 5th year students).
Now students of ChED use the Borland Pascal (historicaly) for most
calculations and C+ for special calculations.
I know that the chemical engineers more like to use the special software
than computer languages...:=)
Sincerely,
Dimitry Saulin
Subject: Re: Help with wastewater
From: jedwards@chinook.halcyon.com (Joseph D. Edwards)
Date: 13 Nov 1996 07:57:50 GMT
You may be able to use chemical precipitation.
I wrote a book on how to approach WW treatment.
see:
http://www.cleanh2o.com/cleanh2o/welcome.html
for more details and links to other WW treatment resources.
Cheers, Joe Edwards
In article <56adok$8qk@hermes.oanet.com>, r wrote:
>In article <328684FE.7CD8@sprintmail.com>, Dave says:
>>
>>Will someone please point me in the right direction?
>> We have a problem with our wastwater effluent. It contains lead, cadmium, zinc, nickel
>>and a host of other nasties. We do not want to just dump it. The pollutants are in solid form
>>suspended in water. We need a way to get rid of the water & leave the sludge behind & then pay
>>to have it shipped off somewhere appropriate. We produce about 100 gallons/week &cant; afford the
>>$5000/55gal drum that it would cost to get rid of the whole mess.
>> Is this the right NG to post this Q to? Is there another one that might be more
>>appropriate?
>> Any help or ideas that anyone might have will be appreciated greatly.
>> Thanks in advance.
>>Dave
>>wingnut@sprintmail.com
>
> If the solids are truly in suspension, and not also partly present
>as dissolved salts, I would think that some form of filtration, either
>gravity or pressure, would separate the solids from the liquid. Alternatively,
>a centrifuge could be used to precipitate them rapidly.
>
>Gravity settling followed by decantation of the supernatent liquid might be
>possible, especially if you use a flocculating agent to enhance the
>precipitation. These agents are very long chain organic polymers that cause
>the particles to coalesce and settle more rapidly than they would alone.
>They are used in milligram quantities and are quite economic.
>
>If, as I suspect, there are dissolved salts of the metals in the liquid as
>well, then the separation will be more difficult. You will need to consult
>a chemist who is experienced in that area. Most of the metals you mention
>have some sparingly soluble salts, so this form of treatment should not be
>that difficult.
>
>When you have a final separation into a wet solid and a harmless liquid,
>you may find there is a company who will buy the solid part for metals
>recovery. It is certainly worth checking out. It probably means accumulating
>a tons or two of the solid to make a worthwhile shipment. Companies like
>NL Industries, who are in the lead/zinc/cadmium business, might be
>interested.
>
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