posted 02-26-2000 10:31 AM         

________ (a respected bee) almost lost his vision PERMANENTLY
because he used methanol.

I wont divulge his name, but you'd know it.
No, not me.

The true advantage with the concept of the SRV was FAR more subtle than anyone wanted to give credit for.

Why?

cause you can FEEL it, with your hands, if it warms up.

Also, the choice of isopropyl seems to be very obvious, considering the scale you are doing this on.

BUT, I didnt crawl out of my hole to criticize, purely.

My guess is that if you are putting some real Pd JUICE to that mixture.

Do you mind giving ratios?

I still think your basic idea on the scale up is good...I am trippin' a little that you blew a hole in your unit.

What are they rated at, psi-wise?

I am lookin at search engine stuff by you on this subject, so if what I am asking is all
well-known and old news, forgive me.

I envision this stainless, 10L fire extinguisher being converted to a variant of your ghetto reactor....

you blew the sides out of stainless, ok,
did you calculate an estimate of the pressures you were generating?

Glad you're still around.

posted 02-26-2000 11:01 AM         

KrZ: Jeezus God Man! Glad all turned out ok.

posted 02-27-2000 04:09 AM         

Also is there an OTC source for 99% IPA? The only thing that comes to mind is the shit that is sold at the pharmacies, but it's in little 500ml bottles.

posted 03-03-2000 07:02 AM         

I think it is time for someone to find out!

Easy to do, I'll just hook one up to an air compressor and seal it in a garbage bin and go!
I'll get on to it in the next week, and get back to youse!

Just in the interests of science!(and fun)

posted 03-03-2000 08:35 AM         

I'm with ya gewurz, think plastic. PP or something like that, you can place it in a steel drum and cast concrete around it and pressurize the shit out of it. Or use a wound(sp?) fiberglass container.

posted 03-03-2000 01:55 PM         

quote:

---

1L wine jugs will hold 80psi
just as well as 4L's. I think the reduction in strength isn't that great on scale-up
as you might bee thinking.

---

Arrrgh! That's exactly what I'm talking about! Of course the material strengh will not suffer, but the pressure of the gasses inside pushing the flat bottomed part outwards outwards will be much stronger! You can evacuate an 250 ml erlenmeyer with an oil pump without cracking it, do the same to a 2L erlenmeyer and -surprise!- that motherfucker will crack!

quote:

---

This custom pyrex 3/4" shit will definitely withstand
some serious psi considering that a 4L is only 1/4" thick and this is 3x that and
only 5x the volume.

---

quote:

---

We'll see what these fermentors can take.

---

quote:

---

And also, you
shouldn't be heating an oxidation, if anything you should run it in an ice-bath for
optimum yields. See the article that the O2 wacker is based on.

---

posted 03-03-2000 02:15 PM         

Quote;

"Isomerization may be minimized by carrying out the oxidation at low temperatures. Thus oxidation of 1-octene to 2-octanone to the extent of 62% at 90C, 85% at 60C, and MORE THAN 97% at 30C"

If you want to tell me that a gas is more soluble in a liquid at high ass temperatures than at low ones go ahead. It sure as hell runs contrary to everythings I've ever heard. I think I'll stick with peer reviewed Journal Articles and textbook physics equations for now.

"I am familiar with that ref, I was the first to post it here."

Great, try reading it too next time.

Just wait and see what happens, or tell me where I can get a glass-lined reactor and I'll shut the fuck up. Okay, sorry for the flamishness, but lets throw down and start name calling next. It's my favorite part.

Neener Neener Booboo.

posted 03-03-2000 02:53 PM         

quote:

---

80 pounds per square inch is 80 pounds per square inch, it has to do with area not volume guy.

---

Yup, you are right. Now, if you consider that area is (per definition) proportional to the sqare of the radius, you will come to the conclusion that the area of the flat part is much bigger in case of the big bottle. Get some of your physic books and calculate the force for a 1L bottle and a 4L bottle, and compare them. I might even do it over the weekend, in case I'm bored.

quote:

---

If you want to tell me that a gas is more soluble in a liquid at high ass temperatures than at low ones go ahead. It sure as hell runs contrary to everythings I've ever heard.

---

Of course a gas is more soluble in cold solvent, but are you sure that gas dissolution is the rate determining step in this reaction? Maybe it is one of the many the reoxidation of catalyst steps?
Many variables must be considered here (what stirring/shaking, catalyst concentrations etc), and I'm not aware of any research done to measure the significance of all those variables for a substrate like allylbenzenes.

quote:

---

Isomerization may be minimized by carrying out the oxidation at low ttemperatures. Thus oxidation of 1-octene to 2-octanone to the extent of 62% at 90C, 85% at 60C, and MORE THAN 97% at 30C

---

quote:

---

I think I'll stick with peer reviewed Journal Articles and textbook physics equations for now.

---

quote:

---

Okay, sorry for the flamishness, but lets throw down and start name calling next. It's my favorite part.

---

No hard feelings, but I'm way pimper than you.

quote:

---

That was not intended to deny that rounded glassware can withstand greater psi that flat glassware.

---

posted 03-03-2000 03:29 PM         

"Yup, you are right. Now, if you consider that area is (per definition) proportional to the sqare of the radius, you will come to the conclusion that the area of the flat part is much bigger in case of the big bottle." Yeah no fucking shit, but the force per unit area is still the same. You know exactly NOTHING.

I want some newbee fuckwit to come in here and blow his fucking dimwitted face off so he will be rubbed out and will discourage all the other shit-for-brains HS dropouts from trying to do chemistry.

"Of course a gas is more soluble in cold solvent, but are you sure that gas dissolution is the rate determining step in this reaction?"
I never said it was the rate determining step in the reaction. The heat determines the rate of isomerization. Why the hell else would heated oxidations yield so much more isosafrole???

"Very slow O2 absorption was observed at or below RT."
This is either BS or poor data collection.

If you hold a piece of paper taught flat it can hold less weight than if you leave some slack in it, that doesn't mean your sheet of paper is going to split in half when you put a pencil on it if it's flat and will hold an elephant if it's curved.

"Develop a formula to calculate the force pushing the bottom of a flat-bottomed bottle outwards!" It's just the force per unit area times the area!!!!!!!!!!!!!!!!!! But the thickness and STRENGTH per unit area of the glass remains the same. Since the outside of the sphere has a slightly greater AREA per unit force (because using the same delta r with varying r will give a reducing value of Area Outside/Area inside), the smaller flask will indeed having higher strength, but the OA/IA will only be 1 with flat glass. THAT is why small flasks are stronger, but the change in OA/IA from a 1/4" 1L to a 1/4" 4L is much smaller than that going from a 1/4" 25ml to a 1/4" 100ml.

ALL NEWBEES FUCKOFF AND DIE YOU CAN NEVER DO THIS IT IS DANGEROUS AS HELL.

Whatever I'm sure you wouldn't say shit if spicebitch said that his soda bottle cold hold 120psi with its 1/16" thick plastic.

I'm going to kick my GRE scores straight up your ass if you keep talking scrit about something you don't understand.

And strangelove, why don't you try doing some shit before you go about making claims about what vessel to use. Need I mention your bromo???????????

posted 03-03-2000 04:21 PM         

I only use 45psi.

Also, I am very happy these days. No need to
go off on you with anger, so I'll just go off.

I had the balls to try it before you, I had the sense to try it before you, I had the
SUCCESS before you.

A-N-D....

my unit cost 3 dollar, American.

NEVER EVER FAILED ON ME.

not once.

The crappy yields that some experienced were
due to variables not properly isolated.

You wanna talk smack about the bromosafrole thing, but;

I admitted the truth, THEN, I corrected it,
retracted it, posted A REAL working synth in its place, and I will tell you something else....

I aint having any of the troubles you are...

You wanna talk some shit?

Read Semtex's post above.

You imply shit just like you bitch about others doing.

He thought your posts were complete,too...

He who lives in glass houses shouldn't throw stones...

You're just asking for severe bodily harm when that glass goes everywhere, and variables being what they are, if you do it
enough times, it WILL fuck up and blow.

I still stand by my statement(s) concerning plastic.

Why risk your life and (as you say)
thousands of dollars doing it the route you're going?

Is it just a chem snob thing you have about glass?

(and the way you always callin' ev'ryone 'bitch'...methinks I smell a sheep in wolves clothing)