Liquid purification or separation – Processes – Making an insoluble substance or accreting suspended...
Patent
1998-10-05
2000-08-01
Simmons, David A.
Liquid purification or separation
Processes
Making an insoluble substance or accreting suspended...
210724, 210726, 210757, 210913, C02F 162, C02F 170
Patent
active
060962232
ABSTRACT:
The present invention relates to a process for treating contaminated water to precipitate metals without increasing the total dissolved solids content. In particular, the invention relates to the use of phosphoric acid and calcium hydroxide or calcium oxide to adjust the pH of chromium contaminated groundwater during the treatment process without increasing the total dissolved solids (TDS).
REFERENCES:
patent: 4671882 (1987-06-01), Douglas et al.
patent: 5158687 (1992-10-01), Terry et al.
patent: 5211853 (1993-05-01), Jackson et al.
Presentation at American Inst. of Chem. Engineers, 1998 Spring Mtg., New Orleans, LA, by S. Seth, et al.
Environmental Progress vol. 17, No. 3 (1998), pp. 209-213, by Y. El-Shoubary, et al.
El-Shoubary Youssef
Seth Subash C.
Speizer Ned A.
Daniel Mark R.
Korsen Elliott
Merck & Co. , Inc.
Morrison Betsey J.
Simmons David A.
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