Process for preparing ether carboxylates and alkali metal...

Details Process for preparing ether carboxylates and alkali metal... Process for preparing ether carboxylates and alkali metal...

C - Chemistry, Metallurgy

07

C

260/522.2

C07C 51/373 (2006.01) C07C 51/367 (2006.01) C07C 59/305 (2006.01)

Patent

CA 1315293

05-21(6870)A ABSTRACT There is disclosed herein improved processes for the preparation of ether carboxylates by reacting in an alkaline reaction medium the salts of maleic acid and a carboxylic or polycarboxylic acid having a reactive hydroxyl group on a non-carbonyl carbon atom in the presence of a calcium ion catalyst wherein unreacted acid salts are recovered from the reaction medium by lowering the pH of the reaction medium to a range of from about 4 to about 6. The precipitated salts are recycled to the synthesis reaction to prepare additional amounts of product.

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