Exxon Chemical Patents, Inc.

Other

Exxonmobil Chemical Patents Inc.

Jos Peter Wristers

Robert Scott Smith

Hsiang-Ning Sun

Roque V Martir

John J Cikut

James Richardson Lattner

Dan E Hendriksen

A process for catalytically isomerizing olefins, particularly for isomerizing alkenyl bridged ring compounds to the corresponding alkylidene bridged ring compounds. The catalyst is prepared by forming a dispersion of a metallic alkali metal on a support with simultaneous exposure to oxygen.

Isomerization of olefins

The present invention provides a method comprising (a) contacting a first reaction mixture comprising an aromatic and a dilute stream comprising ethylene and propylene with a large pore microporous solid acid catalyst, preferably a large pore zeolite catalyst, which is effective to promote alkylation of the aromatic under first conditions effective to maintain a liquid phase comprising the aromatic and effective to cause the propylene to alkylate said aromatic but substantially ineffective to cause the ethylene to alkylate said aromatic, forming propylated aromatic and a second dilute stream comprising ethylene but substantially depleted of propylene, and (b) recovering the propylated aromatic.

Process to alkylate an aromatic with a dilute stream comprising

A method is provided for selectively producing a trans-geometrical isomer of non-conjugated diolefins. The method comprises treating a starting non-conjugated diolefin isomer or mixture of isomers, a first mono-olefin and a second mono-olefin with a metathesis catalyst under selected reaction conditions to produce a product with greater than 80% trans-geometrical isomer content. In a preferred embodiment, 1,4-hexadiene, ethene, and propene contact a Re.sub.2 O.sub.7 catalyst and are converted to a reaction product mixture with above 80% trans-1,4-hexadiene.

Method for making trans non-conjugated diolefins

Inhibition of popcorn polymer growth by treatment with a sulfur-containing compound. The sulfur-containing compound can be added to organic material from which popcorn polymer is formed, or applied to extant popcorn polymer.

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Clear Lake Shores, TX, United States of America

Jos Peter Wristers