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    • 2. 发明授权
    • Process of preparing a solution of cesium and rubidium salts
    • 制备铯和铷盐溶液的方法
    • US5900221A
    • 1999-05-04
    • US649712
    • 1996-09-18
    • Hartmut HofmannKlaus KobeleHorst PrinzKlaus Schade
    • Hartmut HofmannKlaus KobeleHorst PrinzKlaus Schade
    • C01D17/00C04B7/24C07C51/41C07C53/06C07C53/10C07C59/265C22B26/10C01D3/00C22B26/00
    • C07C59/265C01D17/00C04B7/24C07C53/06C07C53/10Y02P40/145Y02P40/18
    • The 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).sub.2 in a suspension with a mole ratio of SiO.sub.2 to CaO of from 1:2.5 to 1:1.25 in a rotary tubular autoclave at a digestion temperature of 200 to 280.degree. 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/cm.sup.3. An optional aeration of the digestion filtrate with carbon dioxide to remove lithium and calcium ions in precipitated carbonates may be performed.
    • PCT No.PCT / EP94 / 03651 Sec。 371日期1996年9月18日 102(e)1996年9月18日PCT 1994年11月2日PCT公布。 WO95 / 13986 PCT公开 日期1995年5月26日制备含铯和铷盐的溶液的方法包括用Ca(OH)2水溶液在平均粒径达0.5mm的未煅烧的琉璃榴石和/或煅烧的石榴石颗粒进行水热消解 在旋转管式高压釜中在200至280℃的消化温度下,在15至65巴的压力和悬浮密度下,SiO 2与CaO的摩尔比为1:2.5至1:1.25的悬浮液 8至18重量%,0.5至3小时; 过滤悬浮液以除去不溶性固体并形成消化滤液; 向消化滤液中加入至少一种酸或酸酐以将其pH调节至6并形成含铯和铷盐的溶液; 在水热消解后进行蒸发,得到铯盐和铷盐溶液中的铯盐和铷盐的浓度增加,将含铯盐和铷盐溶液的密度调整为1.6〜3.3g / cm3。 可以任选地将消化滤液与二氧化碳通气以除去沉淀碳酸盐中的锂离子和钙离子。