Equilibrium production of sodium carbonate from sodium bicarbonate
    3.
    发明授权
    Equilibrium production of sodium carbonate from sodium bicarbonate 失效
    从碳酸氢钠平衡生产碳酸钠

    公开(公告)号:US5609838A

    公开(公告)日:1997-03-11

    申请号:US489103

    申请日:1995-06-09

    IPC分类号: C01D7/12 C01D7/37

    CPC分类号: C01D7/126 C01D7/12

    摘要: A process for producing sodium carbonate and other sodium-based chemicals from an aqueous solution containing sodium bicarbonate by contacting an aqueous solution of a bicarbonate-containing composition with a gas that is predominately other than carbon dioxide in an amount and for a time adequate to cause a sufficient amount of carbon dioxide to leave the aqueous solution to reduce the amount of bicarbonate ion in the solution by converting the bicarbonate to carbonate as carbon dioxide leaves the solution and thereafter converting the remaining solution to other sodium salts.

    摘要翻译: 通过使含碳酸氢盐的组合物的水溶液与主要不是二氧化碳的气体接触,使含碳酸氢钠的水溶液中的碳酸钠和其它钠基化学物质的量和足以导致 足够量的二氧化碳离开水溶液以通过将碳酸氢盐转化为碳酸盐将二氧化碳离开溶液,然后将剩余溶液转化为其它钠盐,从而减少溶液中碳酸氢根离子的量。

    Production of soda ash from nahcolite
    5.
    发明授权
    Production of soda ash from nahcolite 失效
    从nahcolite生产苏打灰

    公开(公告)号:US4557910A

    公开(公告)日:1985-12-10

    申请号:US362826

    申请日:1982-03-29

    申请人: Morton Meadow

    发明人: Morton Meadow

    CPC分类号: C01D7/126

    摘要: Soda ash is prepared from dry-mined nahcolite ore by partially calcining the ore, dissolving the ore in aqueous solution, separating the resultant solution from the ore insolubles, crystallizing anhydrous sodium carbonate or sodium carbonate monohydrate, and recovering the crystallized sodium carbonate.

    摘要翻译: 通过部分煅烧矿石,将矿石溶解在水溶液中,将所得溶液与矿石不溶物分离,使无水碳酸钠或碳酸钠一水合物结晶并回收结晶的碳酸钠,由干法矿砂制备苏打灰。

    Method for recovery of alkali values from trona using air stripping
    9.
    发明授权
    Method for recovery of alkali values from trona using air stripping 失效
    使用空气剥离法从天然碱中回收碱值的方法

    公开(公告)号:US5989505A

    公开(公告)日:1999-11-23

    申请号:US617394

    申请日:1996-03-18

    CPC分类号: C01D7/10 C01D7/126 C22B26/10

    摘要: A process for recovery of alkali values from trona in which trona is dissolved, the sodium carbonate in the feed solution is converted to sodium bicarbonate by introducing carbon dioxide, sodium bicarbonate is crystallized and separated from a mother liquor, and sodium bicarbonate in the mother liquor is converted to sodium carbonate by introducing air to form a recirculating dissolving solution which is used to dissolve the trona.

    摘要翻译: 一种从天然碱溶解的天然碱中回收碱值的方法,将进料溶液中的碳酸钠通过引入二氧化碳转化为碳酸氢钠,将碳酸氢钠从母液中结晶并分离,并将母液中的碳酸氢钠 通过引入空气形成用于溶解天然碱的再循环溶解溶液而转化为碳酸钠。

    Process for producing anhydrous sodium carbonate
    10.
    发明授权
    Process for producing anhydrous sodium carbonate 失效
    无水碳酸钠生产方法

    公开(公告)号:US4652437A

    公开(公告)日:1987-03-24

    申请号:US650503

    申请日:1984-09-14

    CPC分类号: C01D7/126

    摘要: A process for producing anhydrous sodium carbonate by the pyrolysis of wet sodium bicarbonate, which comprises (a) a step of forming a complex salt selected from the group consisting of Na.sub.2 CO.sub.3.3NaHCO.sub.3 and Na.sub.2 CO.sub.3.NaHCO.sub.3.2H.sub.2 O by the pyrolysis of wet sodium bicarbonate under such temperature and pressure conditions that said complex salt is stable, and (b) a step of forming anhydrous sodium carbonate by the pyrolysis of said complex salt under such temperature and pressure conditions that the anhydrous sodium carbonate is stable.

    摘要翻译: 通过湿式碳酸氢钠的热解制备无水碳酸钠的方法,其包括(a)通过湿碳酸氢钠的热解形成由Na 2 CO 3·3H 2 CO 3和Na 2 CO 3·NaHCO 3·2H 2 O组成的组中形成的络盐的步骤 所述复合盐稳定的温度和压力条件,(b)在无水碳酸钠稳定的温度和压力条件下,通过所述络盐的热解形成无水碳酸钠的步骤。