The Vespiary

The Hive => Chemistry Discourse => Topic started by: ambi on November 06, 2004, 03:30:00 AM

Title: acetic anhydride synth ( acetone&co2)
Post by: ambi on November 06, 2004, 03:30:00 AM
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

ambi ;)
Title: Acetone + Acetic Acid -> Acetic Anhydride
Post by: Rhodium on November 06, 2004, 03:42:00 AM
It's not especially new -

UTFSE for "ketene lamp" (

Title: not the same (acetone + Co2=AA)
Post by: ambi on November 06, 2004, 04:19:00 AM
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,.
Title: Industrial Processes
Post by: lugh on November 06, 2004, 05:24:00 AM
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  ;)  The keten lamp is far more practical for the average bee, it also utilizes acetone, and doesn't require pressure  ;D  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 (



Patent GB668268 (



Title: CO2
Post by: roger2003 on November 06, 2004, 08:38:00 AM
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.

Title: excuse me,
Post by: ambi on November 09, 2004, 06:29:00 AM
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,



forget it,.