Arco Chemical Technology, L.p.

Lyondell Chemical Technology, L.p.

Wilson H Onimus

Bernard Cooker

Jennifer D Jewson

Anne Mae Gaffney

Ralph M Dessau

John C Jubin, Jr

Edrick Morales

Reaction gases such as hydrogen, oxygen and propylene are reacted in a slurry of solid catalyst in solvent, the reaction being carried out in a series of separate zones with intermediate removal of the exothermic heat of reaction by indirect heat exchange.

Reaction system

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

A TS-1 catalyst suitable for the production of oxirane compounds is prepared by subjecting conventionally formed TS-1 to a size reduction treatment such as milling such that the average particle size weighted by volume of the TS-1 is reduced to less than 10 microns in diameter and the size reduced TS-1 is spray dried.

Catalyst preparation

Titanium or vanadium zeolites are heated at a temperature greater than 400&#xb0; C., then contacted with water prior to use in olefin epoxidation with hydrogen peroxide.

Epoxidation catalyst

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

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.

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Holmes, PA, United States of America

Wilson H Onimus