Acetic Acid → HCID 22163007, compound

A straight batch distillation employing a 20 tray Oldershaw column at a reflux ratio of 10/1 at atmospheric pressure with a pot temperature of 140°-146° C. and an overhead temperature of 115°-140° C. was carried out on a reaction mixture resulting from an acid catalyzed esterification of propylene glycol monomethyl ether (PM) and acetic acid to produce propylene glycol monomethyl acetate (PMA). The reaction mixture contained on a percent by weight basis 97.2% propylene glycol monomethyl ether acetate, 2.0% unreacted acetic acid, 0.1% unreacted propylene glycol monomethyl ether and 0.7% p-toluene sulfonic acid catalyst. The distillation was carried out for 1 hour and a 14% overhead cut taken. The results were as follows:

1. distillationA straight batch distillation
2. customwith a pot temperature of 140°-146° C.
3. customan overhead temperature of 115°-140° C.
4. customresulting from an acid

ORD record

ord-d522455d46bf49eea010a75222c9031c

Source dataset

uspto-grants-1985_10

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US04544453