The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 25, 1978
Filed:
Apr. 05, 1976
John A Cengel, Wheaton, IL (US);
Imre Puskas, Glen Ellyn, IL (US);
Standard Oil Company (Indiana), Chicago, IL (US);
Abstract
A process for producing alkenyl substituted anhydrides which comprises introducing one mole of polypropene or polybutene having a number average molecular weight of 200-3000, 0.8-5.0 moles of the anhydride of an unsaturated dicarboxylic acid and 5-200 ppm of an additive which suppresses the formation of tarry materials and undesirable reaction side products and/or improves yield, into a reaction zone, reacting said materials at a temperature from about 150.degree. C to about 300.degree. C to form the alkenyl anhydride, distilling off and condensing the unreacted anhydride from the reaction mixture, recovering the alkenyl substituted anhydride, and returning at least a portion of the recovered unreacted anhydride to a reaction zone for reaction with an alkenyl material.