Method for producing calcium carbonate during formation of a fibrous web
US8852402B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Sep 10, 2012 |
| Grant date | Oct 7, 2014 |
| Priority date | — |
| Expiry date | Sep 10, 2032 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD21H17/675
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A method for production of calcium carbonate in a target suspension of a fibrous web forming process of a fibrous web machine, wherein the calcium carbonate is produced in a reactor, the method includes: injecting a chemical including carbon dioxide or lime milk through an injection mixer to the target suspension flowing through the reactor; allowing the chemical including to react while in the target suspension to form calcium carbonate crystals, and inhibiting precipitation of the chemical or a reaction product of the chemical on a surface of or in the reactor by application of an electric or magnetic field to or proximate to the surface along a region of the surface adjacent to the reaction involving the chemical.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.