Method of recovering thiourea dioxide
    1.
    发明授权
    Method of recovering thiourea dioxide 失效
    回收二氧化硫脲的方法

    公开(公告)号:US4238411A

    公开(公告)日:1980-12-09

    申请号:US55787

    申请日:1979-07-09

    CPC分类号: C07C381/14

    摘要: According to this invention there is provided a method of recovering thiourea dioxide characterized in that in the production of thiourea dioxide by the reaction of thiourea and hydrogen peroxide in an aqueous solvent, the waste liquor after separation of the crystals of thiourea dioxide after reaction is treated with an ion-exchange resin to remove side reaction products and impurities contained therein, and is then concentrated with a reverse-osmotic membrane to crystallize the thiourea dioxide dissolved therein.

    摘要翻译: 根据本发明,提供了一种回收二氧化硫脲的方法,其特征在于在通过硫脲和过氧化氢在水性溶剂中反应制备二氧化硫脲时,处理反应后分离出二氧化硫脲二氧化钛晶体的废液 用离子交换树脂除去其中所含的副反应产物和杂质,然后用​​反渗透膜浓缩以使其中溶解的二氧化硫脲结晶。

    Process for preparing thiourea dioxide
    2.
    发明授权
    Process for preparing thiourea dioxide 失效
    制备二氧化硫脲的方法

    公开(公告)号:US4233238A

    公开(公告)日:1980-11-11

    申请号:US55788

    申请日:1979-07-09

    CPC分类号: C07C381/14

    摘要: According to this invention there is provided a process for preparing thiourea dioxide characterized in that in the production of thiourea dioxide by the reaction of thiourea and hydrogen peroxide in an aqueous solvent, the filtrate after separation of the crystals of thiourea dioxide after reaction is treated with an ion-exchange resin to remove side reaction products and impurities contained therein and then is used again as a reaction solvent.

    摘要翻译: 根据本发明,提供了一种制备二氧化硫脲的方法,其特征在于在通过硫脲和过氧化氢在水溶剂中反应制备二氧化硫脲二氧化物时,将反应后的二氧化硫脲二氧化钛晶体分离后的滤液用 离子交换树脂,以除去其中所含的副反应产物和杂质,然后再次用作反应溶剂。

    Process for preparing high purity hydrogen peroxide
    6.
    发明授权
    Process for preparing high purity hydrogen peroxide 失效
    制备高纯度过氧化氢的方法

    公开(公告)号:US5055286A

    公开(公告)日:1991-10-08

    申请号:US207176

    申请日:1988-06-15

    IPC分类号: B01J45/00 C01B15/013

    CPC分类号: C01B15/013 C01B15/0135

    摘要: Metal ions contained in hydrogen peroxide can be removed efficiently, safely and inexpensively by contacting hydrogen peroxide to be purified with an anion exchange resin with a chelating agent adsorbed therein.

    摘要翻译: 通过将待纯化的过氧化氢与阴离子交换树脂与吸附的螯合剂接触,可以有效,安全且廉价地除去过氧化氢中所含的金属离子。