Process for recovery and recycle of methanesulfonic acid and phosphorous
acid
    4.
    发明授权
    Process for recovery and recycle of methanesulfonic acid and phosphorous acid 失效
    甲磺酸和亚磷酸的回收和再循环方法

    公开(公告)号:US5589691A

    公开(公告)日:1996-12-31

    申请号:US254213

    申请日:1994-06-06

    IPC分类号: C02F1/52 C07F9/38 C09K3/00

    CPC分类号: C07F9/3873

    摘要: Disclosed is a process for recovering and recycling waste methanesulfonic acid (MSA) and phosphorous acid (H.sub.3 PO.sub.3) in a bisphosphonation process for reuse in the process. The recovery process involves treating a waste crude mother liquor stream with HCl to remove sodium ion, as sodium chloride, recovering HCl--H.sub.2 O by atmospheric distillation, separating and dehydrating a mixture of methanesulfonic acid and phosphorous acid by vacuum distillation for recycle. The substantially dry methanesulfonic acid and phosphorous acid, and previous HCl, can all be recycled back to the process for reuse.

    摘要翻译: 公开了一种在二膦酸化方法中回收和回收废甲烷磺酸(MSA)和亚磷酸(H 3 PO 3)以在该方法中再利用的方法。 回收过程包括用HCl处理废粗母液流以除去钠离子,作为氯化钠,通过常压蒸馏回收HCl-H 2 O,通过真空蒸馏分离和脱水甲磺酸和亚磷酸的混合物以进行再循环。 基本上干燥的甲磺酸和亚磷酸以及先前的HCl都可以循环回该过程进行再利用。