Recovering by-products from sea water brines and the like

Details Recovering by-products from sea water brines and the like Recovering by-products from sea water brines and the like

1978-09-22

1981-12-22

Bernstein, Hiram

Chemistry: physical processes

Physical processes

Crystallization

23298, 23302T, 23305R, 23303, B01D 902

Patent

active

043068804

ABSTRACT:
The improved production of sodium sulfate, potassium sulfate and other valuable salts from salt plant bitterns or the like wherein initial reduction in sulfate ion concentration yields salt cake and greatly facilitates the selective recovery of potassium and other valuable by-product salts. The process includes cooling the bitterns while below a certain concentration to produce glauber salt, followed by successive solar evaporation steps to yield harvestable potash salts. The salts are selectively treated and then refined by flotation. The flotation overflow is converted to potassium sulfate product by decomposition and crystallization steps and the underflow provides a recycle salt mixture for converting the glauber salt to salt cake.

REFERENCES:
patent: 1328418 (1920-01-01), Burnham
patent: 1593038 (1926-07-01), Silsbee
patent: 3528767 (1970-09-01), Garrett
patent: 3615259 (1971-10-01), Neitzel
patent: 4072472 (1978-02-01), Lukes

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