Process for preparing phosphate salts

C - Chemistry – Metallurgy – 01 – B

Patent

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Details

CPC

23/62

IPC codes

C01B 25/26 (2006.01) C01B 25/28 (2006.01) C01B 25/40 (2006.01) C01B 25/46 (2006.01)

Type

Patent

Patent number

CA 1094287

Description

PROCESS FOR PREPARING PHOSPHATE SALTS A B S T R A C T Phosphate values can be recovered from an organic extract which is formed by contact of wet process phosphoric acid and a water immiscible solvent, in a process in which the extract is treated with an inorganic base or a dihydrogen phosphate salt to give an acid free solvent and an aqueous solution of phosphoric acid and phosphate salt with a cation to P ratio usually in the 0.1 - 0.5 : 1 - region. The aqueous solution represents a concentrated soluble phosphate source for subsequent neutralization and conversion to e.g. tripolyphosphates.

Application Number

258176

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