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    Method for preparing sodium bicarbonate and hydrogen chloride
    2.
    发明授权
    Method for preparing sodium bicarbonate and hydrogen chloride 失效
    制备碳酸氢钠和氯化氢的方法

    公开(公告)号：US4320106A

    公开(公告)日：1982-03-16

    申请号：US200035

    申请日：1980-10-23

    申请人： Bernhard Hentschel ,  Jurgen Ziebarth ,  Alfred Coenen ,  Kurt Kosswig ,  Ferdinand V. Praun

    发明人： Bernhard Hentschel ,  Jurgen Ziebarth ,  Alfred Coenen ,  Kurt Kosswig ,  Ferdinand V. Praun

    IPC分类号： C01D7/16 ,  C01D7/00 ,  C01B7/07

    CPC分类号： C01D7/16

    摘要： A process for preparing sodium bicarbonate and hydrogen chloride by reacting an aqueous sodium chloride solution with carbon dioxide under pressure in the presence of an amine and of an organic solvent.1. Carbon dioxide is introduced under a pressure of8-80 bars into a mixture essentially containing1.1 an aqueous sodium chloride solution,1.2 a tertiary amine,1.3 a non-polar organic solvent, and1.4 a polar, organic solvent having a boiling point above 140.degree. C.,2. the aqueous and organic phases obtained are separated under the same pressure as step 1,3. the aqueous phase is rid of the precipitated sodium bicarbonate and following reconcentration with sodium chloride is fed back into process stage 1 (carbonization),4. the organic phase(s) containing the polar and non-polar organic solvents is (are) heated and the hydrogen chloride released is evacuated, and5. the tertiary amine, polar and non-polar organic solvents from step 4 are recirculated in step 1.The tertiary amine used is an N-alkyl-azacycloalkane with a total of at least 14 C atoms having the general formula ##STR1## wherein n is an integer from 4 to 12, R is an alkyl group having 1-18 carbon atoms and where any methylene groups may be substituted by alkyl groups with a maximum of 6 carbon atoms in the total sum of alkyl groups.

    摘要翻译： 通过在胺和有机溶剂的存在下，在压力下使氯化钠水溶液与二氧化碳反应制备碳酸氢钠和氯化氢的方法。 在8-80巴的压力下将二氧化碳引入基本上含有1.1氯化钠水溶液，1.2份叔胺，1.3份非极性有机溶剂和1.4份具有沸点的极性有机溶剂的混合物 在140℃以上，2.在与步骤1,3相同的压力下分离获得的水相和有机相。水相除去沉淀的碳酸氢钠，并且随后用氯化钠再浓缩被反馈到工艺阶段1（ 碳化），4.将含有极性和非极性有机溶剂的有机相加热并释放出氯化氢，并将步骤4中的叔胺，极性和非极性有机溶剂 所用的叔胺是具有总共至少14个C原子的N-烷基 - 氮杂环烷烃，其通式为：其中n为4-12的整数，R为具有1个 -18个碳原子，其中任何甲基 亚基可以被烷基的总和中具有最多6个碳原子的烷基取代。