Method of making paper
US5900116A · kind A · utility
10Cited by
17References
20Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 19, 1997 |
| Grant date | May 4, 1999 |
| Priority date | — |
| Expiry date | May 19, 2017 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD21H23/765
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A method of coagulating particulates, as in papermaking or water clarification applications, for example, is provided wherein a zeolite crystalloid coagulant is added to water containing the solid matter, a source of multivalent cations, and a cationic acrylamide polymer. The zeolite crystalloid coagulant is preferably prepared by admixing aqueous sodium silicate and sodium aluminate solutions to form a reaction mixture and allowing a reaction to proceed for a sufficient time to form a zeolite crystalloid coagulant particles having particle sizes of at least about 4 nm before terminating the reaction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.