Water treatment for sulfate ion removal

Details Water treatment for sulfate ion removal Water treatment for sulfate ion removal

1990-03-14

1991-07-30

Hruskoci, Peter

Liquid purification or separation

Processes

Making an insoluble substance or accreting suspended...

210713, 210716, 210718, 210723, 210724, 210912, 210916, 210714, C02F 152

Patent

active

050358073

ABSTRACT:
The invention provides a chemical process for the treatment of water containing dissolved calcium and sulphate ions, so as to produce a purified product water having a reduced sulphate ion concentration. Barium sulphide is added to the water to cause precipitation of barium sulphate from the water. The water from which the barium sulphate has been precipitated is then treated with carbon dioxide to form hydrogen sulphide in the water, and the hydrogen sulphide is stripped from the water.

REFERENCES:
patent: 1547111 (1925-07-01), Finn
patent: 1689036 (1928-10-01), Leiss
patent: 1964487 (1934-06-01), Smith
patent: 3725267 (1973-04-01), Gelblum
patent: 3935100 (1976-01-01), Alagy et al.
patent: 4031195 (1977-06-01), Elston
patent: 4070443 (1978-01-01), Kikuchi et al.
patent: 4078048 (1978-03-01), Nadkarni
patent: 4839059 (1989-06-01), Maree
"The Chemical Removal of Sulfates", Trusler, G. E., et al. Proceedings, So. Africal Inst. of Chem. Engineers Published 8/15/88.

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