Imperial Chemical Industries Limited

Johnson Matthey Public Limited Company

Stephen Bailey

Cornelis Martinus Lok

Gavin Gray

Brian Peter Williams

Mark S Doran

Sebastien Grizard

Stephen Derek Rogers

Robert Wilson

Production of nickel/silica hydrogenation catalyst precursors by heating a slurry of particulate silica, e.g. kieselguhr, in an aqueous nickel ammine carbonate solution for a total period of at least 200 minutes at a pH above 7.5, followed by filtration, washing, drying, and optionally calcination.

Hydrogenation catalysts

Shaped absorbent units suitable for use as chloride absorbents comprising a calcined intimate mixture of an alkali or alkaline earth, zinc and aluminium components having an alkali or alkaline earth mental to zinc atomic ratio in the range 0.5x to 2.5x and an alkali or alkaline earth metal to aluminium atomic ratio in the range 0.5x to 1.5x, where x is the valency of the alkali or alkaline earth metal, and containing from 5 to 20% by weight of a binder. Preferred compositions are made from sodium carbonate or bicarbonate, basic zinc carbonate or zinc oxide and alumina or hydrated alumina.

Absorbents

The invention relates to catalysts comprising cobalt supported on a solid silica support and, in particular, to a method for manufacturing such catalysts. The catalysts may be prepared by slurrying a silica powder or impregnating a silica particle with a solution of a cobalt compound, cobalt amine carbonate, and aging the resulting slurry or solid at elevated temperature; the cobalt amine carbonate is decomposed and precipitated as basic cobalt carbonate onto the silica support. Preferably, the catalysts have a cobalt surface area in the range of 25 to >100 m2 per gram total cobalt. The catalyst may be used in hydrogenation reactions, Fischer-Tropsch reactions and oxidation reactions.

Method for the production of cobalt catalysts supported on silicon dioxide and their use

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Richmond, United Kingdom

Stephen Bailey