Manufacture of sodium tripolyphosphate from wet acid

Details Manufacture of sodium tripolyphosphate from wet acid Manufacture of sodium tripolyphosphate from wet acid

1986-05-09

1987-06-30

Metz, Andrew H.

Chemistry of inorganic compounds

Phosphorus or compound thereof

Oxygen containing

423309, 423313, 423318, 423321R, 423321S, C01B 1516, C01B 25235, C01B 2541, C01B 2546

Patent

active

046769633

ABSTRACT:
A process is described for converting wet acid into sodium tripolyphosphate by pretreating the wet acid in a pretreatment stage with a sodium source and SiO.sub.2 to precipitate fluoride values from the wet acid, solvent extracting the pretreated wet acid to remove further impurities, reacting the solvent extracted acid with a sodium source in a made up stage to form a sodium orthophosphate liquor, heating the resulting liquor in a calcining stage to produce sodium tripolyphosphate, passing gases from the calcining stage into a scrubber liquor to remove fluoride impurities and entrained sodium tripolyphosphate, recycling scrubber liquor to the make up stage to recover sodium tripolyphosphate values, and removing a bleed stream from the recycled scrubber liquor and recycling it to the pretreatment stage to remove fluoride impurities therein in the pretreatment stage.

REFERENCES:
patent: 2883266 (1959-04-01), Hodges et al.
patent: 3151936 (1964-10-01), Hollingsworth et al.
patent: 3309174 (1967-03-01), Pals
patent: 3410656 (1968-11-01), Bunin et al.
patent: 3455651 (1969-07-01), Satterwhite et al.
patent: 3506394 (1970-04-01), Okamura et al.
patent: 3554694 (1971-01-01), Barker et al.
patent: 3574535 (1971-04-01), Molodovan et al.
patent: 3607029 (1971-09-01), Goret et al.
patent: 3661514 (1972-05-01), Herink
patent: 3714330 (1973-01-01), Barker
patent: 3800029 (1974-03-01), Omoto et al.
patent: 4024225 (1977-05-01), Chiang
patent: 4086322 (1978-04-01), Drechsel
patent: 4117092 (1978-09-01), Beltz et al.
patent: 4132540 (1979-01-01), Edwards et al.
patent: 4146575 (1979-03-01), Gallistru et al.
patent: 4160657 (1979-07-01), Drechsel
patent: 4191734 (1980-03-01), Dreshsel
patent: 4285920 (1981-08-01), Jassal
patent: 4328196 (1982-05-01), Sardisco et al.
patent: 4590051 (1986-05-01), Shimp

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