Method of treatment of the circulation water of a paper mill
US4761238A · kind A · utility
4Cited by
1References
6Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 1, 1987 |
| Grant date | Aug 2, 1988 |
| Priority date | — |
| Expiry date | Jul 1, 2007 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC02F1/54
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
A method for removing dissolved and colloidal material from the circulation water of a paper mill with chemical pulp fibers wherein fiber sludge which has been recovered from the paper manufacturing process and acidified to a pH of 1.5-2.5, is mixed with the circulation water of a paper mill whereby the dissolved and colloidal substances are precipitated.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.