反応式
[S:1](=[O:5])(=[O:4])([OH:3])[OH:2].[S:6]([O-:10])([O-:9])(=[O:8])=[O:7].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O.[F-].[Ca+2:27].[Ca+2].[Ca+2].[Ca+2].[Ca+2].[Ca]>>[OH2:2].[S:6]([O-:10])([O-:9])(=[O:8])=[O:7].[Ca+2:27].[Ca+2:27].[S:1]([O-:5])([O-:4])(=[O:3])=[O:2]参加物
実験手順
adding sulfuric acid in amounts such that the sulfate content of the sulfuric acid plus the sulfate content of the added phosphate rock is equivalent to about 90% to about 100% of the stoichiometric amount of sulfate required to react with the calcium present in the phosphate rock added in part (a) to form calcium sulfate hemihydrate to a second reaction vessel maintained at a reduced pressure of about 3 to about 20 inches of mercury absolute and a temperature of about 66°-113° C. which contains a second slurry comprising calcium sulfate hemihydrate, monocalcium phosphate, sulfuric acid and phosphoric acid, whereby the sulfuric acid reacts with the monocalcium phosphate and the phosphate rock to form calcium sulfate hemihydrate and phosphoric acid, said second slurry being maintained at a soluble sulfate concentration of about 0.7% to +4.5%,
出典と根拠
- ORDレコード
- ord-b00a8af404394eef9076834e193ba5a6
- 出典データセット
- uspto-grants-1981_04
- 特許番号
- US04260584
関連ノート
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