Process for controlling pitch deposits in the pulp and papermaking processes with zirconium (IV) compound
US4950361A · kind A · utility
12Cited by
4References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 15, 1988 |
| Grant date | Aug 21, 1990 |
| Priority date | — |
| Expiry date | Sep 15, 2008 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S162/04
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
The deposition of pitch on the machinery used in the pulping and papermaking processes and in the final paper produced in the papermaking process is prevented by adding an effective amount of a water-soluble zirconium(IV) compound to the aqueous system of a pulping and/or papermaking process to prevent the deposition of pitch on the machinery and in the final paper. The addition of an effective amount of a water-soluble zirconium(IV) compound to the aqueous system of the pulping and papermaking process also removes pitch deposits from the machinery used in the pulping and papermaking processes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.