发明名称 |
METHOD OF PREPARING A CAESIUM AND RUBIDIUM SALT SOLUTION |
摘要 |
<p>PCT No. PCT/EP94/03651 Sec. 371 Date Sep. 18, 1996 Sec. 102(e) Date Sep. 18, 1996 PCT Filed Nov. 2, 1994 PCT Pub. No. WO95/13986 PCT Pub. Date May 26, 1995The process for preparing a cesium and rubidium salt-containing solution includes a hydrothermal digestion of an uncalcined pollucite and/or calcined lepidolite particulate having an average particle size up to 0.5 mm with an aqueous solution of Ca(OH)2 in a suspension with a mole ratio of SiO2 to CaO of from 1:2.5 to 1:1.25 in a rotary tubular autoclave at a digestion temperature of 200 to 280 DEG C., under a pressure of from 15 to 65 bar and at a suspension density between 8 and 18% by weight for from 0.5 to 3 hours; filtering the suspension to remove insoluble solids and to form a digestion filtrate; adding at least one acid or acid anhydride to the digestion filtrate to adjust its pH to 6 and to form the cesium and rubidium salt-containing solution; and performing an evaporation after the hydrothermal digestion to obtain an increase in concentration of cesium salts and rubidium salts in the cesium and rubidium salt-containing solution and to adjust a density of the cesium and rubidium salt-containing solution to from 1.6 to 3.3 g/cm3. An optional aeration of the digestion filtrate with carbon dioxide to remove lithium and calcium ions in precipitated carbonates may be performed.</p> |
申请公布号 |
HU9601283(D0) |
申请公布日期 |
1996.07.29 |
申请号 |
HU19960001283 |
申请日期 |
1994.11.02 |
申请人 |
METALLGESELLSCHAFT AG. |
发明人 |
HOFMANN,HARTMUT;KOEBELE,KLAUS;PRINZ,HORST;SCHADE,KLAUS |
分类号 |
C01D17/00;C04B7/24;C07C51/41;C07C53/06;C07C53/10;C07C59/265;C22B26/10 |
主分类号 |
C01D17/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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