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Acetic Anhydride

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Author	Topic: Acetic Anhydride
dlwdaw Frequent Poster	posted September 13, 1999 07:13 PM how could I make Acetic Anhydride. could i distill Acetic acid(vineger is 4% acetic acid I would have to have a shitload of it.). and would acetic acid evaporate before or after the water in it. if it would go before. then i could use a distilling apparatus, would plastic be able to handle pure Acetic acid. if anybody has a file tell me and I will email you and you can reply to it. thanks in advance ------------------ >><>signature<><< this is the cops give me all your ...ahem.. books on making, ahem.. bombs. ;) ;-) visit my website. http://learn.to/makeexplosives http://fun.to/makeexplosives http://remember.to/makeexplosives they are the same I just thought making those names would be fun
nbk2000 Moderator	posted September 13, 1999 10:44 PM You'll never get anhydride by distilling vineger.You have to pass ketene gas through the glacial acetic acid to make anhydride. I can send you the process if you e-mail me your e-mail address. Send it to "nbk2k@yahoo.com" ------------------ "The knowledge that they fear is a weapon to be used against them." www.50megs.com/nbk2000
*Igenx* Frequent Poster	posted September 13, 1999 10:59 PM I thought that acetic acid decomposes apon heating? The chem book I was loking at a couple days ago said so, but I don't know if it was accurate (or if I remember it corectly)
megalomania Administrator	posted September 14, 1999 05:42 AM There is about a dozen different ways of making acetic anhydride and the ketene is very dangerous. Ketene is extremely toxic, unless you have the equipment for it, you will probably die. Other methods abound, but making it from acetic acid is more along the lines of availability. There are quite a few steps, however. Phosphorus, chlorine, sodium hydroxide, and vinegar are needed. All can be gotton too. The ketene method would be nice IF the instructions are clear, concise, accurate, and feasible. Why don't you post the data, please ------------------ Visit Megalomania's Explosives and Stuff at http://surf.to/megalomania
nbk2000 Moderator	posted September 14, 1999 02:52 PM Ask and ye shall recieve. ACETIC ANHYDRIDE MFG. Acetic anhydride is a common industrial chemical. It is used for synthetic polyester manufacturer. It is a highly dehydrated acetic acid compound. lt is dehydrated by the addition of ketane gas to acetic acid. The acetic acid produced by the "E" process as a by product is fortified to it's original anhydride form by the addition of this ketane gas after filtering out the product from the reaction liquid. Acetic acid is also readily available from photo developers as a common photography chemical. Acetone is available from hardware stores or paint stores as a common solvent. This process reacts the acetone by heat into the necessary ketane gas and it is subsequently absorbed by acetic acid to form the acetic anhydride product. This is attractive due to the ability to recycle the chemicals for other batches. CAUTION: Acetic anhydride is a caustic dangerous chemical. It's vapors are harmful and should be avoided. All contact should be avoided. It is also highly flammable and should be used with the utmost caution. Wear appropriate protective clothing. PROCESS- Acetic anhydride is produced by absorption of ketane vapors in acetic acid. Acetone is injected into a chrome/iron alloy pipe through one end equipped with a feed valve and assembly. This pipe is previously purged with argon or nitrogen. The pipe is heated to 650 to 670 degrees C. This heating can be done by electric heat with a thermostat or by a coal or gas fired oven. The injection of acetone into the reaction tube is begun when the proper temperature is reached. The other end of the pipe is attached to a stainless steel 3/8" tubing. This tubing is placed through a two hole stopper in a gallon jar placed in a salted ice bath. This is to collect all unreacted acetone. In the other hole in the stopper on this bottle is placed a second stainless steel tubing. This goes to another gallon jar through a two hole stopper. In this jar is placed the acetic acid. The second hole in this stopper is placed in line for venting purposes. This line is placed outside or in a safe place for the poisonous fumes to go. Acetone is injected slowly into the chrome/iron pipe @ 650 to 670 degrees C. This will react approximately 15-25% of the acetone into ketane. The vapors from the reactor is directed into the first bottle. The unreacted acetone will collect here. The ketane vapor will continue through the tubing to the next jar. The ketane vapors are absorbed here by the glacial acetic acid. These vapors are absorbed until the density of the liquid is 1.08 @ 20 degrees C. This is checked by a hydrometer placed in the glacial acetic acid. At the time this specific gravity is reached the material in the second jar is acetic anhydride. If glacial acetic acid is used from previous "E" process filtering then the acetic anhydride will need to be filtered to remove the remaining type "B" R.D.X. CAUTION: Acetone is highly flammable. Great care is needed to ensure total absence of air in the reactor prior to injection of acetone. Failure to do this can result in an explosion. The whole reaction should be done with very good ventilation. Hope this is informative. ------------------ "The knowledge that they fear is a weapon to be used against them." www.50megs.com/nbk2000
nbk2000 Moderator	posted September 14, 1999 02:55 PM Take 2. ------------------ "The knowledge that they fear is a weapon to be used against them." www.50megs.com/nbk2000
nbk2000 Moderator	posted September 14, 1999 02:58 PM Fuck it. Here's the link to go get it. http://www.50megs.com/nbk2000/weaponsandtactics/anhydride.jpg ------------------ "The knowledge that they fear is a weapon to be used against them." www.50megs.com/nbk2000
nbk2000 Moderator	posted September 14, 1999 03:02 PM You'll have to type in the link into your browser'cause my server doesn't allow linking from the forum apparently. Sorry about that. ------------------ "The knowledge that they fear is a weapon to be used against them." www.50megs.com/nbk2000
sharky Frequent Poster	posted September 14, 1999 10:01 PM In mega's method for concentrating acetic acid, at what temperature does the sulfuric acid and sodium acetate mixture break down? Also, could this "glacial" acetic acid be used in the manufacture of RDX or does it have to be pure anhydrous?
nbk2000 Moderator	posted September 15, 1999 01:47 AM Anhydrous. ------------------ "The knowledge that they fear is a weapon to be used against them." www.50megs.com/nbk2000

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