Arco Chemical Technology, L.p.

Lyondell Chemical Technology, L.p.

Jennifer D Jewson

Bernard Cooker

Wilson H Onimus

Anne Mae Gaffney

Ralph M Dessau

Andrew P Kahn

Roger A Grey

C Andrew Jones

Rangasamy Pitchai

Large crystals of titanium silicalite or intergrowths of intergrown smaller crystals, having a mean particle size greater than 2 &#x3bc;m, have been found catalytically effective at commercially reasonable rates for the epoxidation of olefins in the presence of hydrogen peroxide. Crystals synthesized with a silica source having a low sodium content exhibit high levels of production and selectivity. The crystals have a low attrition rate and are easily filterable from a product stream.

Process for direct oxidation of propylene to propylene oxide and large particle size titanium silicalite catalysts for use therein

The stability of a noble metal/titanium zeolite catalyst is improved by elevated temperature calcination with an oxygen containing gas; the catalyst is useful in epoxidation involving the reaction of olefin, oxygen and hydrogen.

Solid epoxidation catalyst and preparation

Epoxidation catalyst and process

The selectivity of an olefin epoxidation catalyzed by a noble metal-modified titanium or vanadium zeolite is greatly enhanced by the addition of a nitrogen compound to the reaction mixture. The epoxidation utilizes hydrogen and oxygen in addition to the olefin.

Epoxidation process

Direct oxidation of propylene to propylene oxide is accomplished using alkaline earth metal compound-supported silver catalysts containing an inorganic chloride promoter and a potassium promoter derived from a potassium salt containing a nitrogen oxyanion or precursor thereof.

Chloride containing silver catalysts for propylene epoxidation

The catalytic performance of a supported silver catalyst in a propylene epoxidation process is improved by first contacting the catalyst at an elevated temperature with a treatment stream comprised of carbon dioxide. The carbon dioxide-treated catalyst is thereafter contacted with a feedstream containing propylene, molecular oxygen, but essentially no carbon dioxide under conditions effective to form propylene oxide.

Epoxidation process using supported silver catalysts treated with carbon

Propylene epoxidation using chloride-containing silver catalysts

A propylene epoxidation process wherein a supported silver catalyst is utilized may be operated at high efficiency even in the absence of any organic chloride in the feedstream, provided the catalyst is first contacted at an elevated temperature with a treatment stream comprised of an organic chloride and molecular oxygen.

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Boyertown, PA, United States of America

Jennifer D Jewson