Patent ID: 9511357
Filing Date: 2016-12-06
CPC Classification: B01J,C01B,C07C

Claim Text:
1. A method of preparing an amorphous calcium phosphate catalyst for use in production of 1,3-butadiene and methyl ethyl ketone from 2,3-butanediol, comprising: (a) reacting a phosphoric acid-containing solution with ammonium hydroxide, thus preparing a phosphoric acid-alkali aqueous solution; (b) adding the phosphoric acid-alkali aqueous solution with a calcium precursor aqueous solution, thus preparing a calcium phosphate slurry, wherein preparing the calcium phosphate slurry in (b) is performed at a pH of 6-10; and (c) thermally treating the slurry, thus obtaining an amorphous calcium phosphate catalyst used for 1,3-butadiene and methyl ethyl ketone from 2,3-butanediol.