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专利名称：Process for the production of calcium
fluoride
发明人：John Byrne Michel,Paul Douglas Vernooy申请号：US09565352申请日：20000505公开号：US0287B1公开日：20020806
摘要：A process is disclosed for producing calcium fluoride. The process comprises (a)mixing phosphate rock with aqueous HSiFat ambient temperature for at least one hour;(b) nucleating the calcium fluoride in the slurry prepared in step (a) by reacting the slurryat a temperature and for a time sufficient to initiate and sustain nucleation of calciumfluoride and SiOby-product; (c) aggregating the SiOby-product by heating the slurryproduced in step (b) at a temperature of about 90° C. to about 105° C. for at least 0.5hours; and (d) recovering a calcium fluoride-containing product of an average particle sizeof less than 1 micron.
申请人：E. I. DU PONT DE NEMOURS AND COMPANY
代理人：J. E. Shipley
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