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특허 상세정보

High speed manufacturing process for precipitated calcium carbonate employing sequential perssure carbonation

특허상세정보
국가/구분 United States(US) Patent 등록
국제특허분류(IPC7판) C01F-011/18   
미국특허분류(USC) 423/432 ; 423/430
출원번호 US-0358759 (1999-07-21)
발명자 / 주소
출원인 / 주소
대리인 / 주소
    Goodloe, Jr.
인용정보 피인용 횟수 : 41  인용 특허 : 78
초록

A process for the production of precipitated calcium carbonate. A slurry of calcium hydroxide is agitated in a pressurized reactor, and carbon dioxide is provided under pressure to the reactor to produce precipitated calcium carbonate at a high reaction rate. Carbon dioxide is utilized at a high efficiency. Solubilized calcium ions and carbonate ions react to produce a calcium carbonate precipitate. Control of process conditions such as temperature, slurry concentration, and pressure, enables production of a desired crystal habit (including sclenohedral,...

대표
청구항

[ What is claimed is:] [1.]1. A method for the production of precipitated calcium carbonate, said method comprising:(a) providing a source of calcium ions;(b) mixing said source of calcium ions with a solvent to create a slurry, said slurry comprising (i) an undissolved portion of said source of calcium ions, and (ii) a solution comprising calcium ions;(c) feeding said slurry to a reactor;(d) bubbling a gas stream comprising carbon dioxide through said slurry while maintaining said reactor at a pressure above atmospheric pressure, to produce carbonate io...

이 특허에 인용된 특허 (78)

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