Process and apparatus for recovering alcoholic phosphoric...

Details Process and apparatus for recovering alcoholic phosphoric... Process and apparatus for recovering alcoholic phosphoric...

C - Chemistry, Metallurgy

01

B

23/384, 23/72

C01B 25/18 (2006.01) B01D 11/04 (2006.01) C01B 25/22 (2006.01) C01B 25/234 (2006.01)

Patent

CA 1086474

ABSTRACT OF THE DISCLOSURE Alcoholic phosphoric acid solutions are produced from acid phosphates or phosphate mixtures in the presence of water and a strong mineral acid by ex- traction with water. To this end, an aqueous phos- phate solution or suspension is contacted counter- currently and thereby mixed with a mixture of at least one alcohol having from 3 to 8 carbon atoms and a strong mineral acid,the alcohol or alcohol mixture and the phosphate solution or suspension being used in a ratio by volume of 2 : 1 to 20 : 1, and the mineral acid being used in the quantity just necessary to transform the phosphates approximately quantitative- ly to phosphoric acid. The alcohol or alcohol mix- ture, mineral acid and phosphate solution or sus- pension contain the quantity of water necessary to ensure the formation of a mixture consisting of an alcoholic phase and a separate flowable salt phase, which is separated from the alcoholic phase.

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