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    Process and apparatus for preparation of phosphorus oxyacids from elemental phosphorus
    4.
    发明授权
    Process and apparatus for preparation of phosphorus oxyacids from elemental phosphorus 有权
    从元素磷制备含磷酸的工艺和设备

    公开(公告)号：US06476256B1

    公开(公告)日：2002-11-05

    申请号：US09867210

    申请日：2001-05-29

    申请人： Jerald D. Heise ,  Erik D. Sall ,  Martin P. McGrath

    发明人： Jerald D. Heise ,  Erik D. Sall ,  Martin P. McGrath

    IPC分类号： C07F922

    CPC分类号： C01B25/16 ,  B01J8/005 ,  B01J19/1862 ,  B01J19/246 ,  B01J2208/0053 ,  B01J2208/00557 ,  B01J2219/00099 ,  B01J2219/00159 ,  B01J2219/00166 ,  C07F9/3813

    摘要： A process for the preparation of an oxyacid of phosphorus comprising contacting elemental phosphorus with water in the presence of a catalyst effective to promote oxidation of phosphorus by reaction with water. The use of a noble metal catalyst such as Pd under moderate agitation and low severity conditions is effective for the preparation of P(III) oxyacid in high selectivity. Other suitable catalysts may comprise, for example, other Group VIII metals (particularly other platinum metals); oxides, salts, phosphides, and/or coordination compounds of Group VIII metals; Group IB metals; and/or oxides, salts, phosphides, and/or coordination is compounds of Group IB metals. Various apparatus and process schemes for the preparation of phosphoric and phosphorous acid are also disclosed.

    摘要翻译： 一种磷的含氧酸的制备方法，包括在有效促进与水反应的磷氧化的催化剂存在下使元素磷与水接触。 在中等搅拌和低苛刻度条件下使用贵金属催化剂如Pd是有效的，以高选择性制备P（III）含氧酸。 其它合适的催化剂可以包括例如其它第VIII族金属（特别是其它铂金属）; 氧化物，盐，磷化物和/或第VIII族金属配位化合物; IB族金属; 和/或氧化物，盐，磷化物和/或配位是IB族金属的化合物。 还公开了用于制备磷酸和亚磷酸的各种装置和方法。

    Process for producing phosphorous acid
    6.
    发明授权
    Process for producing phosphorous acid 有权
    亚磷酸生产方法

    公开(公告)号：US06194604B1

    公开(公告)日：2001-02-27

    申请号：US09274629

    申请日：1999-03-23

    申请人： Yinong Ma ,  Jerald D. Heise

    发明人： Yinong Ma ,  Jerald D. Heise

    IPC分类号： C07F938

    CPC分类号： C01B25/163

    摘要： A process for the manufacture of phosphorous acid by selective hydrolysis of phosphite esters. A hydrolysis feed mixture comprising phosphite esters and phosphate esters is contacted with liquid water or steam to selectively hydrolyze the phosphite esters to phosphorous acid. The feed mixture may be prepared by oxidation of elemental phosphorous in the presence of an alcohol. In the oxidation and/or a subsequent esterification step, P(III) and P(V) oxyacids produced in the oxidation reaction are esterified, preferably quantitatively. The ester mixture may be washed to remove unesterified phosphoric and hypophosphorous acid, after which the selective hydrolysis is carried out.

    摘要翻译： 通过选择性水解亚磷酸酯制备亚磷酸的方法。 将包含亚磷酸酯和磷酸酯的水解进料混合物与液态水或蒸汽接触以选择性地将亚磷酸酯水解成亚磷酸。 进料混合物可以通过在醇存在下氧化元素磷来制备。 在氧化和/或随后的酯化步骤中，在氧化反应中产生的P（III）和P（V）含氧酸优选定量地酯化。 可以洗涤酯混合物以除去未酯化的磷酸和次磷酸，然后进行选择性水解。