C - Chemistry – Metallurgy – 09 – C
Patent
C - Chemistry, Metallurgy
09
C
C09C 1/02 (2006.01) C01F 11/18 (2006.01)
Patent
CA 2733080
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"); (~) providing a CO2-comprising gas; (~) 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.
La présente invention concerne un procédé de préparation dun carbonate de calcium précipité (PCC) comprenant les étapes consistant à : (i) fournir du CaO, qui est facultativement partiellement ou totalement éteint (ci-après « source de calcium ») ; (?) fournir un gaz comprenant du CO2 ; (?i) mettre ladite source de calcium de létape (i) en contact avec ledit gaz comprenant du CO2 de létape (ii) dans un environnement aqueux dans un réacteur, en une ou plusieurs étapes ; (iv) obtenir une suspension comprenant un PCC ; (v) facultativement concentrer ladite suspension comprenant le PCC de létape(iv) ; (vi) facultativement ajouter des additifs de dispersion à la suspension de létape (iv) et/ou (v) ; (vii) facultativement broyer le produit de létape iv, v ou vi.
Buri Matthias
Gane Patrick Arthur Charles
Pohl Michael
Omya Development Ag
Robic
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