Esterification of (meth)acrylic acid with an alkanol

Details Esterification of (meth)acrylic acid with an alkanol Esterification of (meth)acrylic acid with an alkanol

1996-08-23

1999-06-08

Barts, Samuel

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

Organic compounds

Carboxylic acid esters

C07C 6952

Patent

active

059106034

ABSTRACT:
In a process for esterifying (meth)acrylic acid with an alkanol in the presence of an acidic esterification catalyst, in which unconverted starting compounds and the (meth)acrylates to be formed are separated off by distillation and an oxyester-containing bottom product is formed, the bottom product is separated off and is heated in the presence of an acid to 150-250.degree. C. and the pressure is adjusted so that the cleavage products formed under the abovementioned conditions from the oxyesters contained in the bottom product evaporate directly. The process can be carried out in the presence of molecular oxygen. Mineral acids, for example sulfuric acid or phosphoric acid and/or alkanesulfonic or arylsulfonic acids, for example methanesulfonic acid or p-toluenesulfonic acid, can be added to the bottom product.

REFERENCES:
Ullmann's Encyclopedia of Industrial Chemistry, vol. A1, "Abrasives to Aluminum Oxide", 5.sup.th Edition, pp. 167-169, 1985.
Derwent abstract 96-231836; abstract of DE 195447485, May 1996.

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