Process for producing chlorinated trisodium phosphate
AssigneeMonsanto Company
InventorChung Y. Shen
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Abstract
A process is disclosed for producing chlorinated trisodium phosphate, comprising: (a) producing a hot sodium phosphate liquor, preferably with an overall Na/P mole ratio from 2.60 to 2.85; (b) adding sodium hypochlorite solution, preferably with an available chlorine content greater than 14%; (c) mixing the components, preferably from 70.degree. C. to 80.degree. C., only long enough to form a true solution; (d) cooling the melt by evaporative cooling under reduced pressure to form crystalline chlorinated trisodium phosphate; (e) air drying the product, if necessary, below about 40.degree. C.
Claims5
A process for producing chlorinated trisodium phosphate, comprising:
- (a) producing a hot sodium phosphate liquor having an overall Na/P mole ratio from about 2 to about 3 at a temperature sufficient to produce a complete solution of the components;
- (b) adding sodium hypochlorite solution;
- (c) mixing the components to form a chlorinated trisodium phosphate melt;
- and
- (d) cooling the chlorinated trisodium phosphate melt by evaporative cooling under reduced pressure with continued mixing without allowing the water content to be reduced to less than 51 percent by weight which results in formation of crystalline chlorinated trisodium phosphate.
Dependencies are inferred from the claim text.