Method for preparation of N-phosphonomethylglycine
    62.
    发明公开
    Method for preparation of N-phosphonomethylglycine 失效
    一种用于N-膦的制备方法。

    公开(公告)号:EP0130008A1

    公开(公告)日:1985-01-02

    申请号:EP84303938.9

    申请日:1984-06-11

    CPC classification number: C07F9/4006 C07F9/3813

    Abstract: A method of preparing N-phosphonomethylglycine comprising; (a) reacting N-hydroxymethyl haloacetamide with a chlorinating agent, preferably thionyl chloride to form N-chloromethyl haloacetamide; (b) reacting N-chloromethyl haloacetamide with a phosphite to form N- haloacetylaminomethyl phosphonate; (c) reacting the phosphonate with derivative of haloacetic acid to form N-haloacyl-N-(cyanomethyl or carboalkoxymethyl) phosphonate; and (d) hydrolyzing this later phosphonate to yield N-phosphonomethylglycine.

    Treatment of low concentration H2S gas streams in liquid phase Claus reactor
    66.
    发明公开
    Treatment of low concentration H2S gas streams in liquid phase Claus reactor 失效
    在Flüssigphase-Claus-Reaktoren的Behandlung vonGasströmenmit Niedriger H2S-Konzentration。

    公开(公告)号:EP0124162A2

    公开(公告)日:1984-11-07

    申请号:EP84200498.8

    申请日:1984-04-09

    CPC classification number: C01B17/05 B01D53/52

    Abstract: Gas streams containing low concentrations, e.g., under 20 vol. %, of H 2 S can be treated in a liquid phase Claus reactor under superatmospheric pressure. The use of such higher pressures aids in solubilizing the H 2 S and allows for its removal from such streams even though it is present in very dilute form.

    Abstract translation: 含有低浓度的气流,例如低于20体积% %的H 2 S可以在液相Claus反应器中在超大气压下进行处理。 使用这种较高的压力有助于溶解H2S,并且允许其从这种流中除去,即使其以非常稀的形式存在。

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