Process for the production of alkyl (meth)acrylates by direct es

Details Process for the production of alkyl (meth)acrylates by direct es Process for the production of alkyl (meth)acrylates by direct es

1994-01-27

1996-04-23

Killos, Paul J.

Organic compounds -- part of the class 532-570 series

Organic compounds

Carboxylic acid esters

C07C 6748

Patent

active

055105149

ABSTRACT:
An alkyl (meth)acrylate is prepared by a direct esterification (in 1) of (meth)acrylic acid by the corresponding alcohol, catalysed by H.sub.2 SO.sub.4. To the crude reaction mixture (C.sub.1) comprising the desired ester, alcohol, (meth)acrylic acid, alkyl hydrogen sulphate and traces of H.sub.2 SO.sub.4, there is added (in 3) a base to neutralize the acidic species, the resulting salts passing into the aqueous phase (A.sub.1), which is separated from the organic phase (O.sub.1) containing the desired ester. The light products (L.sub.1) containing the alcohol are recovered (in 4) from the aqueous phase, and the waste waters (W.sub.2) are expelled. A hydrolysis is carried out (in 8) of the alkyl hydrogen sulphate present in the aqueous phase (A.sub.1) obtained after the separation which is carried out after neutralization (in 3), to form the alcohol and H.sub.2 SO.sub.4 in this phase, the acidic species resulting from the hydrolysis are neutralized by introduction of a base .into the medium, and the resulting aqueous phase (A.sub.3) is directed to the step for recovery of the alcohol. Pollution of the waters (W.sub.2), attributable to the alkyl hydrogen sulphate, is thus avoided.

REFERENCES:
patent: 4968834 (1990-11-01), Smith et al.
Patent Abstracts of Japan, vol. 015, No. 163 (C-0826), Jan. 24, 1991 (Abstract of Japanese Publication No. 30 34 956).

Affiliated with

Also associated with

Rating

Process for the production of alkyl (meth)acrylates by direct es does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Process for the production of alkyl (meth)acrylates by direct es, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for the production of alkyl (meth)acrylates by direct es will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2309849