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    • 10. 发明授权
    • Production of pure methyldichlorophosphane
    • 生产纯甲基二氯化膦
    • US4104299A
    • 1978-08-01
    • US818124
    • 1977-07-22
    • Alexander OhorodnikKlaus GehrmannStefan SchaferAlbert Mainski
    • Alexander OhorodnikKlaus GehrmannStefan SchaferAlbert Mainski
    • C07F9/02C07F9/52
    • C07F9/52C07F9/025
    • Pure methyldichlorophosphane is recovered from a mixture containing phosphorus trichloride and methyldichlorophosphane as its principal constituents by distillation in two stages. Phosphorus trichloride and other low-boiling material are distilled off overhead in the first stage and methyldichlorophosphane is distilled off from high-boiling material in the second stage, the latter being fed with base product coming from the first stage. More specifically, there is dissolved in the said mixture, prior to admitting it to the first distillation stage, 0.01 to 1 weight % of an organic barium compound or 0.1 to 10 weight % of a non-ionic surfactant, and the base product coming from the first distillation stage is admixed, prior to admitting it to the second distillation stage, with 1 to 10 weight % of phosphorus oxychloride.
    • 通过两步蒸馏从含有三氯化磷和甲基二氯化磷作为主要成分的混合物中回收纯的甲基二氯代苯。 在第一阶段将三氯化磷等低沸点物质蒸馏出塔顶馏出物,在第二阶段从高沸点物质中蒸出甲基二氯化磷,后者由第一阶段的碱产物进料。 更具体地说,在将其加入到第一蒸馏阶段之前,溶解在所述混合物中,0.01至1重量%的有机钡化合物或0.1至10重量%的非离子表面活性剂,并且来自 在将第一蒸馏阶段加入到第二蒸馏阶段之前,加入1至10重量%的三氯氧化磷。