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Sulfate Ion → Calcium Sulfate Dihydrate
関与物質
| 役割 | 名称 | HCID | 仕込み量 |
|---|---|---|---|
| 反応物 | Sulfate Ion | HCID 1117 | — |
| 反応物 | Lithium Chloride | HCID 433294 | — |
| 反応物 | Magnesium | HCID 5462224 | — |
| 反応物 | Boron | HCID 5462311 | — |
| 反応物 | Calcium Hydroxide | HCID 6093208 | — |
| 溶媒 | Sodium chloride; water | HCID 57417360 | — |
| 生成物 | Calcium Sulfate Dihydrate | HCID 24928 | — |
| 生成物 | Calcium tetra borate | HCID 22238541 | — |
反応手順
A brine containing 0.77% lithium in the form of lithium chloride, and 0.28% boron, as well as magnesium and sulfate impurities, was treated with a slurry of slaked lime to a pH of 11.2 to precipitate magnesium as magnesium hydroxide and then treated with a sufficient amount of a 20% solution of calcium chloride to form calcium tetra borate (CaB2O4.6H2O), and gypsum. At pH 11.2, only gypsum precipitated and boron was reduced to 0.15%B due to a dilution effect. Upon concentrating the brine by evaporation, to 40% Li, calcium tetraborate hydrate precipitated and the boron was maintained at 0.13%B.
情報源と証拠
| DOI | 10.6084/m9.figshare.5104873.v1 |
|---|---|
| 特許番号 | US04261960 |
| 出典データセット | uspto-grants-1981_04 |
| ORD ID | ord-79e30cea6502495a9a5df975b136fb91 |
| 出典メモ | uspto-grants-1981_04 |