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Uncle Al
science forum Guru


Joined: 24 Mar 2005
Posts: 1226

PostPosted: Tue Jul 11, 2006 2:19 pm    Post subject: Re: highest-k tubing that won't corrode in Lithium Chloride? Reply with quote

dances_with_barkadas@yahoo.com wrote:
Quote:

seek tubing that won't corrode in strong solutions of Lithium Chloride,
but conducts heat very well. For service in auto/truck exhaust
temperatures.

Corrosion resistance will also depend on whether there is oxygen
(early and middle transition metals vanish), carbon monoxide (middle
and late transition metals vanish), or hydrogen (ferrous
embrittlement) present. Will there be contamination by transition
metal ions like iron or copper? Pitting!

Sintered beryllium oxide, silicon carbide, or alumina come to mind.
Hastelloy C-2000. Oh yeah... Is this Enviro-whiner spew or does the
cost matter?

Lithium is massively toxic. Small doses cause mental aberrations and
depression.

Googole
"green death" corrosion 430 hits
"green death" pitting 311 hits
"yellow death" corrosion 41 hits
"yellow death" pitting 23 hits

--
Uncle Al
http://www.mazepath.com/uncleal/
(Toxic URL! Unsafe for children and most mammals)
http://www.mazepath.com/uncleal/qz3.pdf
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Bob111
science forum Guru Wannabe


Joined: 13 Jan 2006
Posts: 115

PostPosted: Sat Jul 08, 2006 1:25 am    Post subject: Re: Ink Reply with quote

"The Nolalu Barn Owl"
<&#103&#111&#114&#100&#105&#101&#64&#110&#111&#108&#97&#108&#117&#46&#111&#110&#
46&#99&#97> wrote in message news:immu12po4subg9u67n4eddt95sp7c9p7s0@4ax.com...
Quote:
On Mon, 20 Mar 2006 12:08:42 GMT, mshawjr@frontiernet.net wrote:

Sorry guys. The spam stuff was not my intent. I do oppoligies and won't
happen again. I have never been on newsgroups before and not sure how to
work them. I hope you guys can forgive a bad choice. Murphey
BS. For a new guy you managed to hit every single, non related NG I
subscribe to. You are not a beginner any more than I am Mother
Theresa.

Is that you Mother?

Bob
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Radium
science forum Guru Wannabe


Joined: 15 Dec 2005
Posts: 241

PostPosted: Sun Jun 25, 2006 4:44 pm    Post subject: Re: Anthracite's Aromatic Compounds Smell Like Paradise Reply with quote

Farooq W wrote:
Quote:
Radium wrote:

Some of the rural areas of WV, where NG is not readily available and many
folks have coal stoves, burning coal smoke in the winter smells to me mostly
like aromatic organic compounds.

I love this smell.

Coal tar distillates (the volatiles that
distill from coal on thermal processing, such as burning) include a large
number of relatively simple aromatic compounds (toluene and other
substituted benzenes), hetero-substituted aromatic compounds (substituted
pyridines, anilines, phenols), and polycyclic aromatic compounds
(naphthalenes, anthracenes, phenanthrenes, pyrenes, etc.)

Yes. The above compounds are included in the countless long list of
chemicals that give anthracite its heavenly flavor.

These "heavenly flavours" would send people (who love these smells) to
heaven or hell by cancer!

Well, too much of anything -- good or bad -- is bad.

> Mr. Radium should tell us how real radium smells like?
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Jerry Avins
science forum Guru


Joined: 03 May 2005
Posts: 534

PostPosted: Fri Jun 23, 2006 12:52 am    Post subject: Re: Tall Tales of The Bible Belt Reply with quote

interesting122000@yahoo.com wrote:
Quote:
Tall Tales of The Bible Belt

Another edition of "Tall Tales of The Bible Belt" has been released.

This group is about process control, not mind control.

Jerry
--
Engineering is the art of making what you want from things you can get.
ŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻ
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John P Bengi4
science forum beginner


Joined: 21 Mar 2006
Posts: 2

PostPosted: Tue Mar 21, 2006 3:14 am    Post subject: Re: Ink Reply with quote

Do you always answer bots?

LOL

"The Nolalu Barn Owl"
<&#103&#111&#114&#100&#105&#101&#64&#110&#111&#108&#97&#108&#117&#46&#
111&#110&#46&#99&#97> wrote in message
news:immu12po4subg9u67n4eddt95sp7c9p7s0@4ax.com...
Quote:
On Mon, 20 Mar 2006 12:08:42 GMT, mshawjr@frontiernet.net wrote:

Sorry guys. The spam stuff was not my intent. I do oppoligies and
won't
happen again. I have never been on newsgroups before and not sure
how to
work them. I hope you guys can forgive a bad choice. Murphey
BS. For a new guy you managed to hit every single, non related NG I
subscribe to. You are not a beginner any more than I am Mother
Theresa.
-
Regards
Gordie
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The Nolalu Barn Owl
science forum beginner


Joined: 21 Mar 2006
Posts: 1

PostPosted: Tue Mar 21, 2006 1:46 am    Post subject: Re: Ink Reply with quote

On Mon, 20 Mar 2006 12:08:42 GMT, mshawjr@frontiernet.net wrote:

Quote:
Sorry guys. The spam stuff was not my intent. I do oppoligies and won't
happen again. I have never been on newsgroups before and not sure how to
work them. I hope you guys can forgive a bad choice. Murphey
BS. For a new guy you managed to hit every single, non related NG I

subscribe to. You are not a beginner any more than I am Mother
Theresa.
-
Regards
Gordie
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Bob111
science forum Guru Wannabe


Joined: 13 Jan 2006
Posts: 115

PostPosted: Mon Mar 20, 2006 7:00 am    Post subject: Re: Ink Reply with quote

<mshawjr@frontiernet.net> wrote in message news:J6qTf.1038$tT.939@news01.roc.ny...
Quote:
Man I have found this site that has the cheapest ink for any printer.
You can compare prices and then review the companies on service and
quality. <http://www.imagraphix.com> Let me know what you think

Why are spammers always so transparent? These things are always the same.

Bob
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Uncle Al
science forum Guru


Joined: 24 Mar 2005
Posts: 1226

PostPosted: Wed Mar 15, 2006 4:54 pm    Post subject: Re: Salicylic acid handling Reply with quote

Nicolas DELFAU wrote:
Quote:

Dear all,

I have one single question regarding the handling of salicylic acid. This
acid is a very volatile fine powder, which easily adsorb on skin, leading to
unwanted irritation. It also tends to agglomerate and is quite impossible to
solubilize afterwards. So we spread it manually through a mesh onto our
formula, which is the hardener of a high-solids epoxy.
My question is the following : how can one handle it safely, i.e. without
skin irritation ? Does someone have any idea about that ?
Best regards.

If you must sprinkle it over a large area... electrostatic platen. No
dust gets loose. Remember the megaohm resistors lest the high voltage
arc.

--
Uncle Al
http://www.mazepath.com/uncleal/
(Toxic URL! Unsafe for children and most mammals)
http://www.mazepath.com/uncleal/qz3.pdf
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rekuci@gmail.com
science forum addict


Joined: 22 Sep 2005
Posts: 98

PostPosted: Thu Jan 05, 2006 3:26 pm    Post subject: Re: High Pressure Separation Process Reply with quote

vjp2@panix.com wrote:
Quote:
Suppose you have a separation process one mile deep: How can you
use the pressure to your advantage in filtration or even distillation?

In filtration, you usually apply vacuum on the filtrate side of the
filter to speed it up. Only a pressure differential, not a high
pressure on both sides, will help you there. Same for reverse osmosis,
which couples normal osmotic pressure due to a chemical potential
difference across a semi-permeable membrane with an extra applied
pressure ONLY on the high-concentration side, to shift equilibrium. If
you had a reverse osmosis process under water, you would have a higher
pressure on both sides of the membrane, which wouldn't help you at all.
As far as water purification by distillation, high pressure is not
going to help you either because you are usually trying to remove
non-volatile components (salts, metals). This means at high pressure,
you'll just have to pump more heat into the water to get it to
vaporize. Elevated pressure is useful for many distillations, but
certainly the cost of building, operating, and maintaining an
underwater facility is much more than any energy cost to generate high
pressure in the column on land...

In short, desalination and water purification plants are already
located where they're most economical - on land and next to a source of
water.

Quote:
I am thinking of water purification, actually.
Someone (a p-chem prof, actually) had once told me something about
there actually being a voltage drop (caused by pressure difference)
when you go that deep under water?

Huh? Voltage drop? There's a lot of pressure due to the sheer weight of
the water, and it's not a pressure drop. Just pressure.
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steve@nospam.com
science forum beginner


Joined: 16 Sep 2005
Posts: 9

PostPosted: Mon Oct 17, 2005 8:08 pm    Post subject: Re: How write code in HYSYS? Reply with quote

You need to look into writing "extensions" for HYSYS.

HYSYS unit operations have many aspects, such as initialisation,
pressure-flow solving and user-interfacing. You need to make sure that you
address each of these appropriately. You will need more reference resources
than I can write about here, so I shan't even try to do that. Instead, let
me direct you to the HYSYS support website, at

http://support.aspentech.com/

This contains a few documents and examples which will help you with your
project.

Cheers,
- Steve.
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steve@nospam.com
science forum beginner


Joined: 16 Sep 2005
Posts: 9

PostPosted: Fri Sep 16, 2005 6:53 pm    Post subject: Re: some questions about dynamic simulation with Hysys Reply with quote

Raheleh,

The reason that you would have reverse flow is due to either

(1) the pressure gradients within the system (generally, flow must occur
from streams of high pressure to streams of low pressure), or
(2) the specification of a flow boundary in the model that requires a
negative flow through the feed stream.

I would suggest you reconsider the boundaries you have set in the model, and
think about why (physically) your feed stream would be "pushed" back out of
the model.

Also, something that "one_speed" said rings true - namely the reverse flow
messing with your feed compositions. Check that you have set the "feed
block" (go to the dynamic tab, and hit the "Feed Block" button to see the
properties of the... er... let's call it the infinite feed tank that HYSYS
is drawing from to supply your column.) to the correct composition and
temperature. Once this is set, I think that reverse flow won't be able to
"reset" your feed conditions - so when you resolve the reverse flow, you
should be able to get your desired feed stream conditions again.

Perhaps you could try setting a flow specification/boundary on the stream
entering your column, and set pressure specs/boundaries on the tops and
bottoms of your column - that's how I would do a stand-alone model for the
"sake" of building a column model.

Good luck!
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Guest






PostPosted: Thu Sep 01, 2005 7:53 pm    Post subject: Re: cheaply-available chemicals as byproducts? Reply with quote

onehappymadman@yahoo.com wrote:
Quote:
I'm trying to compile a list of cheaply available chemicals and other
products which are typically byproducts of other processes.

Please add to the list. And if any item on the list is in error, let
me know.

CaSO4 (from triple superphosphate manufacture)

CaCl2 (from Solvay process)

feathers (from poultry slaughterhouses) - I read somewhere (Chemical
and Engineering News?) that a chemist who developed a plastic based on
proteins was offered several million pounds of feathers for free... he
declined

CO2 (from beer/wine fermentation) (is this cheaply available???)


Perhaps the Chemical Engineers would have some data to add?
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Joshua Halpern
science forum beginner


Joined: 24 Mar 2005
Posts: 40

PostPosted: Sat Aug 27, 2005 12:44 am    Post subject: Re: IEEE attacks scientist shortage myth. Reply with quote

SNIP....
Quote:

It is below a reasonable level -and will remain so. I have no interest
in perpetuating unemployment in the US, and do not like the idea of
working on H1b/L1 visa. I mean -you can keep the country to yourself
and I have no interest in spoiling the party. The problem comes when
someone in the US passesa directive that some occupation should be off
limits to people in India.

Strawman. What is being debated is whether US firms should offshore
work to India

Quote:
If you want to maintain a leadership -you
should go about improving skills or telling govt to improve investment
climate in YOUR country.

Strawman again. The ONLY reason for offshoring work from the US is wages.

Quote:
That aside -IEEE USA has a dismal future in
legislating the careers of people outside US govt jurisdication. Its
just not your country for you to leguislate.

Tell that to the Iraqis. OTOH, you do recognize that tax laws in the US
could change in a way that there was no advantage to offshoring work.

josh halpern

Quote:

regards
-kamal





Cheers,
Russell

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Straydog1
science forum beginner


Joined: 26 Aug 2005
Posts: 32

PostPosted: Fri Aug 26, 2005 10:11 pm    Post subject: Re: IEEE attacks scientist shortage myth. Reply with quote

On Fri, 26 Aug 2005, Kamal R. Prasad wrote:

Quote:

True. Whether or not there is really a shortage depends on demand &
supply. If industry wants manpower of a certain calibre at a certain
price in order to initiate new projects, you can call that a shortage.
If they shelve the project or send it voerseas -there will not be any
shortage as demand adjusts to supply.
By and large, IEEE USA has a racial attitude towards engineers in
other countries.

What's your evidence of a "racial" attitude? According to its

I tried locating a link on IEEE USA's page-but could not find it.
The ex-president of IEEE USA (John Steadman) made a statement to the
effect "currently offshoring is limited to maintenance and s/w
development. But we worry that when companies find that Indians can do
research too -they will find it attractive to move research to India
... and that should not be allowed to happen in order for the US to
maintain its leadership in innovation".

1. Even if this sentence is true, it has nothing to to with racial
attitude because it says NOTHING about promoting discrimination against
Indians (or anyone) coming to the USA for jobs.
2. The sentence does not make sense in the context of all public
statements by anyone connected with a professional or scientific society.
They ALL want immigration regardless of where people come from.

Quote:
The closeest I found was this article:-
http://www.time.com/time/globalbusiness/article/0,9171,1019866,00.html


website it has "more than 365,000 members in over 150 countries,
almost 40 percent of whom are from outside the United States."

That is true of IEEE -but not of IEEE USA. That statement was on behalf
of IEEE USA and the article as on http://www.ieeeusa.org/. I may have
mentioned the article in the past on usenet.

I would think if over 140,000 members perceived the situation as
you do, the non-U.S. membership of the IEEE would rapidly drop
to ~0.

Hard to do so. Most scientific work takes place in the western
hemisphere.

This does not address the fact that there are a very large number of
non-US people, already, as members.

The bulk of the personnel in any standards group are white
Quote:
-with a sprinking of non-whites.

Your own language, here, shows your own bias since you place everyone into
either the "white" or "non-white" category. This would insult all kinds of
white people who come from lots of places, all kinds of non-white people
who, traditionally, have at least three slang colors; red, yellow, and
black. I'd advise you to think of a better breakdown if you want to
discuss people with different countries of origin. Now, I think you might
be a racist, yourself.

Quote:

They want the profession off limits to engineers in
other countries so that employment among its members can increase to a
reasonable level.

regards
-kamal

So you admit that employment among IEEE members is below a
reasonable level. I wish my professional societies were more
activist in improving employment levels for me.


It is below a reasonable level -and will remain so. I have no interest
in perpetuating unemployment in the US, and do not like the idea of
working on H1b/L1 visa. I mean -you can keep the country to yourself
and I have no interest in spoiling the party. The problem comes when
someone in the US passesa directive that some occupation should be off
limits to people in India. If you want to maintain a leadership -you
should go about improving skills or telling govt to improve investment
climate in YOUR country. That aside -IEEE USA has a dismal future in
legislating the careers of people outside US govt jurisdication. Its
just not your country for you to leguislate.

regards
-kamal




Cheers,
Russell

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Straydog1
science forum beginner


Joined: 26 Aug 2005
Posts: 32

PostPosted: Fri Aug 26, 2005 10:03 pm    Post subject: Re: IEEE attacks scientist shortage myth. Reply with quote

On Fri, 26 Aug 2005, Kamal R. Prasad wrote:

Quote:

rambam@bigpond.net.au wrote:
http://interface2037.com/cms/html/index.php?name=News&file=article&sid=7

"In an 18 August 2005 letter to the editor of "The Washington Post,"
IEEE-USA President Gerard A. Alphonse criticized a headline in the same
day's "Post" column, "Behind the Shortfall of U.S. Scientists." According
to Dr. Alphonse, "Just because China, India and other nations are
graduating large and increasing numbers of scientists and engineers does
not mean that there is a shortage of science and engineering professionals
in the United States."

True.

The IEEE-USA leader added: "For a true picture, look at the rising
unemployment for U.S. scientists and engineers in recent years and the
percentage of individuals trained in science and engineering who are
working in other fields." He concluded: "Increasingly, we see compensation
that is lagging behind other employment categories, job insecurity, rapid
obsolescence due to technological change, and the looming threat of
offshoring." "

True. Whether or not there is really a shortage depends on demand &
supply. If industry wants manpower of a certain calibre at a certain
price in order to initiate new projects, you can call that a shortage.
If they shelve the project or send it voerseas -there will not be any
shortage as demand adjusts to supply.
By and large, IEEE USA has a racial attitude towards engineers in
other countries.

This is a big lie. I have been on a mailing list of mostly (laid-off)
programmers but some engineers and there has been constant talk about why
NONE of the engineering professional societies, whether US based or
international, will take a stand on the issue of replacing a person in a
job in a western country with either an import (H1b, L1, etc) or by
exporting the job to the 3rd world! And, from the responses that this
mailing list has gotten back, any discussion on this issue is tabled
(meaning its dead) by any of the higher ranking officers of those
professional societies. There may be one or two very minor, low
membership, groups that discuss this issue, but the rest prefer to ignore
it.

They want the profession off limits to engineers in
Quote:
other countries so that employment among its members can increase to a
reasonable level.

Not true at all.

Quote:
regards
-kamal

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