Process to prepare precipitated calcium carbonate implementing low charge acrylate a/o maleinate-containing polymer
US9017631B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 4, 2009 |
| Grant date | Apr 28, 2015 |
| Priority date | — |
| Expiry date | May 4, 2032 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD21H19/385
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
Process to prepare a precipitated calcium carbonate (PCC) comprising the following steps: (i) providing CaO, which is optionally partially or fully slaked (hereafter “calcium source”); ({umlaut over (υ)}) providing a CO2-comprising gas; ({umlaut over (υ)}i) contacting said calcium source of step (i) and said CO2-comprising gas of step (ii) in an aqueous environment in a reactor, in one or more steps; (iv) obtaining a PCC-comprising suspension; (v) optionally concentrating said PCC-comprising suspension of step (iv); (vi) optionally adding dispersing additives to the suspension of step (iv) and/or (v); (vii) optionally grinding the product of step iv, v or vi.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.