Production of organic disulfides
    1.
    发明授权
    Production of organic disulfides 失效
    生产有机二硫化物

    公开(公告)号:US5659086A

    公开(公告)日:1997-08-19

    申请号:US467502

    申请日:1995-06-06

    CPC分类号: C07C319/24

    摘要: A process which can be used for producing an organic disulfide is provided. The process comprises the steps of: (1) contacting a base and a mercaptan under an effective condition for forming a brine phase comprising the base and a basic salt of a mercaptan; (2) contacting the brine phase with a mercaptan and hydrogen peroxide under a condition sufficient to effect the formation of an aqueous phase and an organic phase; (3) separating the aqueous phase from the organic phase; (4) recovering the organic phase; and optionally, (5) removing a portion of water from the aqueous phase and thereafter repeating the steps of (2) to (5).

    摘要翻译: 提供了可用于生产有机二硫化物的方法。 该方法包括以下步骤:(1)在形成包含碱的盐水相和硫醇的碱式盐的有效条件下使碱和硫醇接触; (2)在足以形成水相和有机相的条件下使盐水相与硫醇和过氧化氢接触; (3)将水相与有机相分离; (4)回收有机相; 和(5)从水相中除去一部分水,然后重复步骤(2)至(5)。

    Production of dithiodiglycol
    2.
    发明授权
    Production of dithiodiglycol 有权
    二硫二甘醇的生产

    公开(公告)号:US06894194B2

    公开(公告)日:2005-05-17

    申请号:US10728769

    申请日:2003-12-08

    摘要: In a process to make dithiodiglycol by oxidation of β-mercaptoethanol with sulfur, an improved product is recovered when a 1-10 mol % excess of β-mercaptoethanol is used and hydrogen sulfide is removed by vacuum or nitrogen sparge. A typical product contains 88.1 mol % (92.0 wt %) dithiodiglycol, 2.3 mol % (2.9 wt %) trithiodiglycol and 9.6 mol % (5.1 wt %) unreacted β-mercaptoethanol. Reaction of this product with 35 to 50 wt % solution hydrogen peroxide reduces residual β-mercaptoethanol to less than 0.02 wt % mercaptan. Residual water of about 3.6 wt % after hydrogen peroxide treatment is reduced to less than 1 wt % by vacuum stripping and/or nitrogen sparge or with a wiped film evaporator.

    摘要翻译: 在通过用硫氧化β-巯基乙醇制备二硫二甘醇的方法中,当使用1-10mol%过量的β-巯基乙醇并且通过真空或氮气喷射除去硫化氢时,回收改进的产物。 典型的产品含有88.1mol%(92.0wt%)二硫二甘醇,2.3mol%(2.9wt%)三硫二甘醇和9.6mol%(5.1wt%)未反应的β-巯基乙醇。 该产物与35至50重量%的过氧化氢溶液的反应将残留的β-巯基乙醇降低至小于0.02重量%的硫醇。 过氧化氢处理后约3.6重量%的残留水通过真空汽提和/或氮气喷射或用刮膜蒸发器降低至小于1重量%。