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17 条记录 (耗时 0.009 秒)

    Method of purifying aqueous solutions of metal hydroxides
    5.
    发明授权
    Method of purifying aqueous solutions of metal hydroxides 失效
    纯化金属氢氧化物水溶液的方法

    公开(公告)号：US4333913A

    公开(公告)日：1982-06-08

    申请号：US179147

    申请日：1980-08-18

    申请人： Ronald L. Dotson ,  Edward P. Carr

    发明人： Ronald L. Dotson ,  Edward P. Carr

    IPC分类号： C01D1/32 ,  C01G13/02 ,  C02F9/00 ,  C22B3/44 ,  C22B26/10 ,  C22B43/00 ,  C01D1/36

    CPC分类号： C22B43/00 ,  C01D1/32 ,  C01G13/02 ,  C02F1/722 ,  C22B26/10 ,  C22B3/44 ,  C02F2101/20 ,  C02F2101/303 ,  Y02P10/234 ,  Y10S210/914

    摘要： A process is disclosed for purifying aqueous solutions of metal hydroxides.An aqueous solution of a metal hydroxide, such as sodium hydroxide, containing a complex of a heavy metal contaminant, such as mercury, is heated.An oxidizing agent, such as hydrogen peroxide, is reacted with the solution to precipitate solid particles of an oxide of the heavy metal, for example, mercuric oxide, in a solution. The solid particles of mercuric oxide are separated from the solution by filtration.The purified solution comprised of water and sodium hydroxide and containing less than about 0.3 part per million mercury by weight is sold commercially. The solid particles of mercuric oxide are landfilled or otherwise utilized.

    摘要翻译： 公开了用于纯化金属氢氧化物的水溶液的方法。 加入含有重金属污染物如汞的络合物的金属氢氧化物如氢氧化钠的水溶液。 将氧化剂如过氧化氢与溶液反应以在溶液中沉淀重金属氧化物例如氧化汞的固体颗粒。 通过过滤将氧化汞固体颗粒与溶液分离。 包含水和氢氧化钠并且含有小于约0.3重量百万重量ppm的纯化溶液在商业上出售。 氧化汞固体颗粒填埋或以其他方式使用。

    Process for removing residual hydrazine from caustic solutions
    8.
    发明授权
    Process for removing residual hydrazine from caustic solutions 失效
    从苛性碱溶液中除去残留肼的方法

    公开(公告)号：US4366130A

    公开(公告)日：1982-12-28

    申请号：US251080

    申请日：1981-04-06

    申请人： Gyaneshwari P. Khare

    发明人： Gyaneshwari P. Khare

    IPC分类号： C01D1/36 ,  C23F11/06

    CPC分类号： C01D1/36 ,  C23F11/06

    摘要： In a process for manufacturing food-grade caustic such as sodium hydroxide wherein hydrazine or a derivative or salt thereof is used as a corrosion inhibitor, residual hydrazine is removed from the concentrated caustic product solution by oxidation. The oxidation of residual hydrazine is accomplished by adding to the hydrazine-containing concentrated caustic solution, which is characterized by a pH of 14 or higher, a 5- to 10-fold stoichiometric excess of hydrogen peroxide or an equivalent peroxy compound or hypochlorite.

    摘要翻译： 在其中肼或其衍生物或盐用作腐蚀抑制剂的食品级苛性碱如氢氧化钠的制备方法中，通过氧化从浓缩的苛性碱产物溶液中除去残留的肼。 残余肼的氧化是通过加入到含肼浓缩苛性碱溶液中实现的，其特征在于pH为14或更高，5至10倍化学计量过量的过氧化氢或相当的过氧化合物或次氯酸盐。

    Oxidation of organics in aqueous salt solutions
    9.
    发明授权
    Oxidation of organics in aqueous salt solutions 失效
    有机物在盐水溶液中氧化

    公开(公告)号：US4240885A

    公开(公告)日：1980-12-23

    申请号：US61743

    申请日：1979-07-30

    申请人： George D. Suciu ,  John E. Paustian

    发明人： George D. Suciu ,  John E. Paustian

    IPC分类号： C01B32/50 ,  C01D1/36 ,  C01D3/14 ,  C02F1/76 ,  C07D301/28 ,  C25B15/08 ,  C25B1/34

    CPC分类号： C01D3/14 ,  C25B15/08

    摘要： Organic impurities in aqueous salt solutions; e.g., alkali or alkaline earth chloride solutions in particular, brines, are oxidized with chlorate ions at a pH of no greater than 5.0 and a temperature of at least 130.degree. C. to convert the organics to carbon dioxide. The process has particular applicability to oxidation of organic impurities in an aqueous brine solution derived from the saponification of a chlorohydrin to olefin oxide, prior to introduction of the brine into an electrolytic cell.

    摘要翻译： 盐水溶液中的有机杂质; 例如碱金属或碱土金属氯化物溶液，特别是盐水，在不大于5.0的pH和至少130℃的温度下用氯酸根离子氧化，以将有机物转化为二氧化碳。 在将盐水引入电解池之前，该方法特别适用于在衍生自氯代醇至烯烃氧化物的皂化中衍生的盐水水溶液中的有机杂质的氧化。