Process for making sodium tripolyphosphate

Details Process for making sodium tripolyphosphate Process for making sodium tripolyphosphate

1984-08-08

1985-08-20

Doll, John

Chemistry of inorganic compounds

Phosphorus or compound thereof

Oxygen containing

C01B 2530

Patent

active

045363773

ABSTRACT:
A one step spray drying process for making high assay sodium tripolyphosphate having a high concentration of form I material by spray drying an aqueous sodium orthophosphate feed liquor having an Na.sub.2 O:P.sub.2 O.sub.5 ratio of 1.60 to 1.70 at a temperature between 250.degree. and 420.degree. C. for up to one minute to produce sodium tripolyphosphate and cooling the product to 150.degree. C. or below in twenty minutes or less.

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