Method of preparing calcium phosphate catalyst

Details Method of preparing calcium phosphate catalyst Method of preparing calcium phosphate catalyst

B - Operations, Transporting

01

J

252/120

B01J 27/16 (2006.01)

Patent

CA 1143715

ABSTRACT OF THE DISCLOSURE Disclosed is a method of preparing a calcium phosphate catalyst, which comprises reacting a calcium salt with a phosphoric acid salt in aqueous ammonia, separating the precipitate resulting from the reaction mixture thus obtained, shaping and drying said precipitate, and subjecting the dried precipitate to heat treatment within a temperature range of 400 to 600°C in the presence of steam mixed with at least one component selected from the group consisting of an inert gas, air, phosphoric acid, an aldehyde, an oxygen-containing heterocyclic compound, an alcohol, and a diene hydrocarbon. The reaction of the calcium salt with the phosphoric acid salt in aqueous ammonia is effected with the reactants in the molar ratio of 1.5:1 when no phosphoric acid treatment is used, or with the reactants in a molar ration within the range of 1.5:1 to 5.0:1 when the reaction mixture is treated with a phosphoric acid solution to a pH of from 5.0 to 7Ø

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