Phosphoric acid purification by production of 1:1...

C - Chemistry – Metallurgy – 01 – B

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C01B 25/18 (2006.01) C01B 25/234 (2006.01) C01B 25/46 (2006.01) C07F 9/02 (2006.01)

Patent

CA 1037222

ABSTRACT OF THE DISCLOSURE A novel solid anhydrone crystalline compound of phosphoric acid and diisopropyl ether of the formula: H3PO4 - [(CH3)2CH]2O is prepared from a mixture of the ether and phosphoric acid in a molar ratio (R:1) of 0.6:1 to 1.4:1 at a temperature at least as low as the crystalli- ration temperature (T°C) governed by the realationship T = 25(1.2-R). Treatment of the compound with water or a base produces purified acid or a phosphate respectively.

191204

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