Chemistry of inorganic compounds – Phosphorus or compound thereof – Oxygen containing
Patent
1988-08-16
1989-08-15
Heller, Gregory A.
Chemistry of inorganic compounds
Phosphorus or compound thereof
Oxygen containing
423305, C01B 1516, C01B 2526
Patent
active
048572870
ABSTRACT:
A fast-dissolving, non-caking, food grade sodium tripolyphosphate is produced by spraying into a spray dryer an aqueous sodium orthophosphate feed liquor having an Na.sub.2 O:P.sub.2 O.sub.5 ratio of from about 1.60 to about 1.67 containing potassium hydroxide or a soluble potassium salt in amounts to yield about 0.4% to 0.8% by weight potassium in the final product, heating the feed to at least 440.degree. C. to form sodium tripolyphosphate, cooling the sodium tripolyphosphate and adding to it at least about 1% by weight moisture.
REFERENCES:
patent: 3054656 (1962-09-01), Cassidy et al.
patent: 3361675 (1968-01-01), Fuchs et al.
patent: 3431069 (1969-03-01), Hudson et al.
patent: 3446580 (1969-05-01), Fuchs
patent: 3600317 (1971-08-01), Lintner
Dick Chris C.
McMunn Bert D.
Schwartz Barry
Zeh Peter H.
FMC Corporation
Heller Gregory A.
Ianno Frank
Seems Eugene G.
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