Patent · US Active

Process to prepare precipitated calcium carbonate implementing low charge acrylate a/o maleinate-containing polymer

US9017631B2 · kind B2 · utility

1Cited by
2References
37Claims
0Family size

Assignee

Inventors

Key dates

Filing dateAug 4, 2009
Grant dateApr 28, 2015
Priority date
Expiry dateMay 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.