Preparation of detergent grade sodium tripolyphosphate from wet

Details Preparation of detergent grade sodium tripolyphosphate from wet Preparation of detergent grade sodium tripolyphosphate from wet

1975-12-29

1980-06-24

Vertiz, O. R.

Chemistry of inorganic compounds

Phosphorus or compound thereof

Oxygen containing

423321R, C01B 1516, C01B 2526, C01B 2516

Patent

active

042094976

ABSTRACT:
A process for preparing detergent grade sodium tripolyphosphate from wet process phosphoric acid comprising neutralizing said acid to a pH at which the Na:P ratio is about 5:3, contacting the resultant mixture of mono- and disodium orthophosphates with an oxidizing agent selected from the group consisting of ozone, hydrogen peroxide and mixtures thereof, in amounts sufficient to oxidize color causing impurities, and drying and heating said orthophosphates to effect the change to sodium tripolyphosphate.

REFERENCES:
patent: 2747964 (1956-05-01), Bacon et al.
patent: 3423170 (1969-01-01), Edwards et al.
The Condensed Chemical Dictionary, 6th Ed. pp. 839, 840, 589.

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