ambi (Stranger)
11-06-04 03:30
No 539953
       acetic anhydride synth ( acetone&co2)     

I am not sure if anyone has mentioned this ever, but after a lil' searching, couple'a key words changed, the patent Patent GB237302 popped up,.

I believe this will have a wide impact on otc chemistry as we know it,.

I couldn't believe it myself, but when the vapour of acetone and co2 are heated, Acetic anhydride is elegantly formed,.
Plus, it's isolation and purification coudn't be easier,.

I am proud to bring this news, and reallize all the goodies that can be made with AA,.

The AA war is over, - 06/11/04

thankyou
ambiwink 		 
 
 
 
    Rhodium
(Chief Bee)
11-06-04 03:42
No 539957
       Acetone + Acetic Acid -> Acetic Anhydride     

It's not especially new - UTFSE for "ketene lamp"
The Hive - Clandestine Chemists Without Borders 		 
 
 
 
    ambi
(Stranger)
11-06-04 04:19
No 539963
       not the same (acetone + Co2=AA)     

The patent, describes heating the vapours of acetone & Co2,
the ketene involves a lamp, and no co2,.

Have you read the patent?

Running a tube of co2 through boiling acetone, is a hell of a lot different than the ketene method, maybe the chemistry is vaguely similar, but this is simple, and rquires no electricity,. 		 
 
 
 
    lugh
(Moderator)
11-06-04 05:24
No 539978
       Industrial Processes
(Rated as: good read) 		    

It's clear that you haven't read the patent thoroughly, pressure catalyzed processes aren't practical for the average bee, but some do have the capability wink The keten lamp is far more practical for the average bee, it also utilizes acetone, and doesn't require pressure laugh If you keep researching the topic, you'll many more industrial process patents like the one you found:

Patent GB237302



for example

Patent GB309577



Patent GB425973



and Patent GB668268



cool
Chemistry is our Covalent Bond 		 
 
 
 
    roger2003
(Hive Bee)
11-06-04 08:38
No 539998
       CO2     

The critical temperature is 31,3° C and the critical pressure 72,9 bar

If you work with the above patent, you need a lot of technical security systems.
roger2003 		 
 
 
 
    ambi
(Stranger)
11-09-04 06:29
No 540582
       excuse me,     

With out me having to be rude, I suggest all bee's re-read the patent,
Pressure is not necessary, got damn, there are some pompus and vacant monopolies of arrogance hijacking, once what used to be a fine place,.

so there, no pressure,

re-read.

ambi

forget it,.