Method of preparing a calcium phosphate catalyst

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

1979-08-14

1981-01-20

Veritz, O. H.

Chemistry of inorganic compounds

Phosphorus or compound thereof

Oxygen containing

252437, 423308, B01J 1182

Patent

active

042462479

ABSTRACT:
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, suitably shaping said precipitate, drying it, and subjecting it to heat treatment within a temperature range of 450.degree. to 600.degree. C. in the presence of steam mixed with at least one of the components selected from the group consisting of an inert gas, air, phosphoric an acid, aldehyde, an oxygen-containing heterocyclic compound, an alcohol, and a diene hydrocarbon.
The reaction of calcium salts with phosphoric acid salts in aqueous ammonia is effected with the starting reactants taken in the molar ratio of 1.5:1 if no phosphoric acid treatment is used, or with the starting reactants in a molar ratio within the range of 1.5:1 to 5.0:1 if the reaction mixture is treated with a phosphoric acid solution to a pH of from 5.0 to 7.0.

REFERENCES:
patent: 3846338 (1974-11-01), Kachlova et al.

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