Removal of low level hardness impurities from brine feed to chlorine cells
US4038365A · kind A · utility
43Cited by
5References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 3, 1975 |
| Grant date | Jul 26, 1977 |
| Priority date | — |
| Expiry date | Dec 3, 1995 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC02F1/54
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
Brine from a conventional treatment process is pre-filtered prior to the electrolysis of same by a method which includes the steps of: (a) heating the brine, (b) adding sodium carbonate thereto, (c) stirring the solution, (d) allowing the solution to settle, and (e) passing the solution through an absolute membrane filter. The filter "polishes" the brine feed by removing the high hardness ions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.