Process for removing a residue containing sodium sulphate
US5135734A · kind A · utility
6Cited by
9References
12Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 13, 1989 |
| Grant date | Aug 4, 1992 |
| Priority date | — |
| Expiry date | Oct 13, 2009 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB09B3/70
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Process for removing an industrial residue containing sodium sulphate, in which the sodium sulphate in the residue 7 is treated with a calcium salt 12 to precipitate calcium sulphate 13, which is sent to a rock salt deposit 15, from which an aqueous solution of sodium chloride 16 is withdrawn. The process applies to the residues from the desulphurization of fumes by means of sodium bicarbonate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.