Method for recovery of alkali values from trona using two-stage leaching
    2.
    发明授权
    Method for recovery of alkali values from trona using two-stage leaching 失效
    使用两级浸出从天然碱回收碱值的方法

    公开(公告)号:US5624647A

    公开(公告)日:1997-04-29

    申请号:US438344

    申请日:1995-05-10

    CPC分类号: C01D7/00 C01D7/126 C01D7/37

    摘要: A process for recovering alkali values from trona ore by partially dissolving trona in a first dissolving solution to form a first feed liquor and undissolved trona. The first feed liquor is cooled and sodium carbonate decahydrate is precipitated. The sodium carbonate decahydrate is recovered from the resultant first mother liquor that is returned as the first dissolving solution. The undissolved trona is further dissolved in a second dissolving solution to form a second feed liquor. The second feed liquor is preferably carbonated to convert sodium carbonate into sodium bicarbonate, and cooled to precipitate sodium bicarbonate. The sodium bicarbonate is recovered from the resultant second mother liquor that is returned as the second dissolving solution.

    摘要翻译: 通过将天然碱部分地溶解在第一溶解溶液中以形成第一进料液和未溶解的天然碱的方法从天然碱矿石中回收碱值的方法。 第一个进料液体被冷却并且十水碳酸钠沉淀。 从作为第一溶解溶液返回的所得第一母液中回收碳酸钠十水合物。 将未溶解​​的天然碱进一步溶解在第二溶解溶液中以形成第二进料液。 第二进料液优选碳酸化以将碳酸钠转化为碳酸氢钠,并冷却以沉淀碳酸氢钠。 从作为第二溶解溶液返回的所得第二母液中回收碳酸氢钠。

    Method for recovery of alkali values from trona using sequential
crystallization
    3.
    发明授权
    Method for recovery of alkali values from trona using sequential crystallization 失效
    使用顺序结晶从天然碱中回收碱值的方法

    公开(公告)号:US5618504A

    公开(公告)日:1997-04-08

    申请号:US438447

    申请日:1995-05-10

    CPC分类号: C01D7/126 C01D7/00 C01D7/35

    摘要: A process for recovery of alkali values from trona ore comprising (a) dissolving the trona ore, (b) separating the insoluble material to obtain an alkali containing feed liquor, (c) cooling the feed liquor and crystallizing sodium bicarbonate and separating the bicarbonate crystals from the resulting mother liquor, (d) cooling the mother liquor and crystallizing sodium carbonate decahydrate and separating the decahydrate crystals from a weak liquor, and (e) treating the sodium carbonate decahydrate crystals to recover the alkali values therein.

    摘要翻译: 一种从天然碱矿石回收碱值的方法,包括(a)溶解天然碱矿石,(b)分离不溶物以获得含碱的进料液,(c)冷却进料液并结晶碳酸氢钠并分离碳酸氢盐晶体 从所得母液中,(d)冷却母液并使十水碳酸钠结晶,并将十水合物晶体与弱液分离,(e)处理碳酸钠十水合物晶体以回收其中的碱值。