National Distillers and Chemical Corporation

Quantum Chemical Corporation

John A Scheben

James A Hinnenkamp

Ronnie M Hanes

David W Smith

Steve M Augustine

Vernon V Walatka, Jr

Irving L Mador

A method for pretreatment of a palladium-gold catalyst useful in the synthesis of vinyl acetate. A virgin catalyst, following reduction to the metallic palladium and gold, is first heated at elevated temperatures in the presence of an oxidizing agent such as air. The oxidizing agent is withdrawn and an inert gas such as nitrogen is introduced. The catalyst is heated again at a temperature up to 500.degree. C. in the presence of a reducing agent such as hydrogen or ethylene. Improvements in selectivity and yield are obtained.

Pretreatment of palladium-gold catalysts useful in vinyl acetate

A method for pretreatment of a palladium-gold catalyst useful in the synthesis of vinyl acetate. A virgin catalyst, following reduction to the metallic palladium and gold, is first heated at elevated temperatures in the presence of an oxidizing agent such as air. The oxidizing agent is withdrawn and an inert gas such as nitrogen is introduced. The catalyst is heated against at a temperature up to 500.degree. C. in the presence of a reducing agent such as hydrogen or ethylene. Improvement in selectivity and yield are obtained.

A process for the production of secondary-butyl perfluoroester is provided by reacting ethylene with a perfluorocarboxylic acid in the presence of oxygen.

Production of secondary-butyl fluoroester and secondary-butyl alcohol

A process is disclosed for preparing a cyclic ether which comprises cyclodehydrating a polyhydroxy compound of the general formula

Synthesis of cyclic ethers

Crystalline Group VIII metal aluminosilicate compositions which are prepared by exchanging or impregnating a Group VIII metal onto an aluminosilicate. Conversion of methanol in the presence of a hydrogen cofeed to low molecular hydrocarbons employing these aluminosilicates as catalysts is also disclosed.

Crystalline aluminosilicates and their use in the conversion of methanol

A process is described for the preparation of aryl esters such as benzyl acetate by reacting an aryl alkyl compound such as toluene with a carboxylic acid such as acetic acid and oxygen in the presence of a catalytically effective amount of a catalyst comprising palladium metal, gold metal and a metal of Group VA of the Periodic Table of the Elements such as bismuth.

Process for the production of esters

Ethylene and oxygen are reacted in the presence of steam in the vapor phase within the temperature range of from about 150.degree. C. to about 250.degree. C. in contact with a catalytically effective amount of palladium metal on a zinc oxide support in the presence of a sulfur modifier to provide mixtures of acetic acid and vinyl acetate.

Catalytic oxidation of ethylene to mixtures of acetic acid and vinyl

A process is described for the preparation of aromatic aldehydes such as benzaldehyde and substituted benzaldehydes by the liquid phase oxidation of toluene or substituted toluenes in the presence of a catalyst comprising phosphoric acid and a catalytically effective amount of palladium metal, and a sulfur, phosphorus or nitrogen modifier.

Liquid phase process for the production of aromatic aldehydes

A process for the selective production of acetic acid from ethylene with co-production in minor amounts of carbon oxides, by reaction of ethylene and oxygen in the presence of water and a catalyst composition contaning a catalytically effective amount of palladium metal and a sulfur modifier.

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Erlanger, KY, United States of America

John A Scheben