Rhodia Limited

Rhoda Operations

Rastko Vukov

Nemesio Martinez-Castro

Shiming Wo

James Woods

Ji Li

Laurianne Timbart

Howard Prokop

Mohamed Hashem

Transesterification processes for producing a compound of formula (I)  wherein R1 is H or a methyl group, A and B are each, independently, a linear or branched C2-C5 alkylene group, comprising reacting: an acrylate or methacrylate of formula (II)  wherein R1 is H or a methyl group and R2 is a C1-C4 alkyl group, with a compound of formula (III)  wherein the reaction is performed: (i) in the presence of calcium oxide and calcium hydroxide, and (ii) wherein the molar ratio of the compounds of formula (II) to formula (III) is less than 4:1 or 3:1 respectively.

Process for the preparation of (meth)acrylic esters and derivatives

A novel, salt-free monoamphopropionate amphoteric surfactant is prepared in yields of from 75% to 80%, from a reaction comprising an imidazoline and a mixture of acrylic acid and sodium acrylate in an aqueous medium. The acrylic acid/sodium acrylate mixture is comprised of the two components in a range of molar ratios of from about 1:6 to about 1:3, respectively, and by replacing methyl acrylate, the reaction does away with the production of methanol which is an unwanted, hazardous and toxic byproduct. The imidazoline reacts in amounts in excess of 90% resulting in the highly pure yields and any left over unreacted acrylic acid can be easily removed by treating it with sodium bisulfate.

Process for making salt-free amphoterics with high mono amphopropionate

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Princeton, NJ, United States of America

Rastko Vukov