Continuous process for preparing sodium orthophosphate slurries

Details Continuous process for preparing sodium orthophosphate slurries Continuous process for preparing sodium orthophosphate slurries

1984-09-24

1987-04-28

Doll, John

Chemistry of inorganic compounds

Phosphorus or compound thereof

Oxygen containing

423313, 423315, C01B 2530

Patent

active

046613315

ABSTRACT:
Unmilled commercially available granular "natural" soda ash is reacted with orthophosphoric acid to produce a highly concentrated slurry at a molar Na:P ratio of about 1.5 in a continuous process. Problems associated with incomplete reaction are solved and the slurry can be dried to the double salt Na.sub.3 H.sub.3 (PO.sub.4).sub.2 or reacted with aqueous sodium hydroxide to produce a superior precursor for manufacturing sodium tripolyphosphate.

REFERENCES:
patent: 1688112 (1928-10-01), Booth et al.
patent: 3086844 (1963-04-01), Beltz et al.
patent: 3409392 (1968-11-01), Shaver
patent: 3441374 (1969-04-01), Shen
patent: 3591334 (1971-07-01), Hudson et al.
patent: 4224294 (1980-09-01), Powers

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