Arco Chemical Technology, L.p.

Lyondell Chemical Technology, L.p.

Bernard Cooker

Jennifer D Jewson

Wilson H Onimus

Anne Mae Gaffney

Robert N Cochran

Ralph M Dessau

Andrew P Kahn

Edrick Morales

Jay F Miller

Peter J Whitman

Roger A Grey

Rangasamy Pitchai

Prakash G Balan

Thomas I Evans

Rajendra S Albal

Mark A Liepa

The invention is a catalyst comprising a titanium or vanadium zeolite, a binder, and zinc oxide, wherein the catalyst is preparing an aqueous mixture of the zeolite, a binder source, and a zinc oxide source, and subjecting the mixture to rapid drying. The catalyst is useful in olefin epoxidation.

Epoxidation catalyst

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 process is provided for the production of a noble metal on TS-1 catalyst useful for the production of propylene oxide wherein TS-1 from hydrothermal crystallization has noble metal dispersed thereon, the resulting material is spray dried and template used in the crystallization is removed, the resulting product is treated with hydrogen to form active catalyst for propylene oxide production.

Propylene oxide catalyst and use

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.

Propylene oxide is produced by liquid phase reaction of propylene oxygen and hydrogen in contact with a solid epoxidation catalyst at elevated temperature and pressure, the reaction conditions being regulated to provide a weight ratio of dissolved oxygen to dissolved hydrogen in the liquid reaction mixture of at least 16.

Epoxidation process

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.

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.

Epoxidation process using supported silver catalysts pretreated with

The waste organics containing caustic stream from a propylene oxide/styrene monomer process is preferably first concentrated by distillation and then contacted with strong acid such as sulfuric acid and an organic solvent, the admixture is phase separated and an aqueous sodium containing phase reduced in organics is separated from an organic solvent phase reduced in sodium.

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Malvern, PA, United States of America

Bernard Cooker