C - Chemistry – Metallurgy – 07 – D
Patent
C - Chemistry, Metallurgy
07
D
260/365.5
C07D 307/60 (2006.01) C07C 51/567 (2006.01) C08F 8/46 (2006.01) C10M 129/93 (2006.01)
Patent
CA 1082204
Title: TWO-STEP METHOD FOR THE PREPARATION OF SUBSTITUTED CARBOXYLIC ACIDS Abstract of the Disclosure: Substituted carboxylic acids of the type prepared by the alkylation of maleic anhydride with an olefin poly- mer (e.q., polybutene) are prepared by a two-step method which is more economical and efficient than previously known methods. In the first step, the alkylating hydrocarbon is reacted with an unsaturated dicarboxylic acid or derivative thereof in an amount of the latter equal to about 30-90% by weight of the amount required to afford the desired product, optionally in the presence of a small amount of chlorine. In the second step, additional acid or derivative thereof is added and the reaction is continued in the presence of added chlorine.
279942
Ridout & Maybee Llp
The Lubrizol Corporation
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