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1.发明公开Dicalcium phosphate dihydrate for fluoride dentifrice compositions 失效DikalziumphosphatdihydratfürFluoridzahnpastezusammensetzungen。
公开(公告)号：EP0240880A2
公开(公告)日：1987-10-14
申请号：EP87104630.6
申请日：1987-03-27
Applicant: STAUFFER CHEMICAL COMPANY
Inventor： Li, Rosa
CPC classification number: H01G4/2325 , A61K8/24 , A61Q11/00 , C01B25/322 , C01B25/327
Abstract: The monofluorophosphate compatibility of dicalcium phosphate dihydrate can be improved in processes in which a slaked lime slurry is reacted with phosphoric acid to form a monocalcium phosphate solution to which is added magnesium oxide, additional lime slurry and pyrophosphoric acid with later removal of the dicalcium phosphate dihydrate. The improvement involved adding the magnesium oxide at O.3% - 2% and adding O.1% - less than O.5% of trimagnesium phosphate to the recovered dicalcium phosphate dihydrate.
Abstract translation: 磷酸二钙的一氟磷酸盐相容性可以在熟石灰浆与磷酸反应形成磷酸一钙溶液的方法中得到改善，其中加入氧化镁，另外的石灰浆和焦磷酸，随后除去磷酸二钙二水合物 。 该改进涉及将氧化镁加入O.3％-2％，并向回收的磷酸二钙二水合物中加入O.1％ - 少于磷酸三钙的0.5％。
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公开(公告)号：EP0240880A3
公开(公告)日：1988-03-30
申请号：EP87104630
申请日：1987-03-27
Applicant: STAUFFER CHEMICAL COMPANY
Inventor： Li, Rosa
CPC classification number: H01G4/2325 , A61K8/24 , A61Q11/00 , C01B25/322 , C01B25/327
Abstract: The monofluorophosphate compatibility of dicalcium phosphate dihydrate can be improved in processes in which a slaked lime slurry is reacted with phosphoric acid to form a monocalcium phosphate solution to which is added magnesium oxide, additional lime slurry and pyrophosphoric acid with later removal of the dicalcium phosphate dihydrate. The improvement involved adding the magnesium oxide at O.3% - 2% and adding O.1% - less than O.5% of trimagnesium phosphate to the recovered dicalcium phosphate dihydrate.
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