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    • 6. 发明授权
    • Process for the preparation of tertiary phosphine oxides
    • 制备叔氧化膦的方法
    • US4806691A
    • 1989-02-21
    • US905170
    • 1986-09-09
    • Erwin Weiss
    • Erwin Weiss
    • C07F9/53
    • C07F9/53
    • Tertiary phosphine oxides are prepared by oxidation of tertiary phosphine sulfides using H.sub.2 O.sub.2 in a solvent comprising about 2-20% by weight of optionally halogenated lower aliphatic carboxylic acids and the remainder of mono- or polyhydric aliphatic or cycloaliphatic alcohols--if appropriate in mixtures with other inert solvents which are miscible with the carboxylic acid/alcohol mixture. Preferred solvents comprise acetic acid/methanol and acetic acid/ethanol mixtures.The reaction products are final products and intermediates products in various specialized fields such as, for example, the plant protection sector and the polymers sector.
    • 通过使用H 2 O 2在包含约2-20重量%的任选卤代的低级脂族羧酸的溶剂中氧化叔膦硫化物并且其余的一元或多元脂族或脂环族醇 - 如果合适地与其它物质的混合物 与羧酸/醇混合物可混溶的惰性溶剂。 优选的溶剂包括乙酸/甲醇和乙酸/乙醇混合物。 反应产物是各种专业领域的最终产品和中间体产品,例如植物保护部门和聚合物部门。
    • 9. 发明授权
    • Process for the preparation of vinylphosphonic dichloride
    • 乙烯基膦酸二氯化物的制备方法
    • US4761251A
    • 1988-08-02
    • US089964
    • 1987-08-27
    • Herbert SiegelErwin WeissHarald Berger
    • Herbert SiegelErwin WeissHarald Berger
    • B01J31/00C07B61/00C07F9/42
    • C07F9/42
    • The invention relates to a process for the preparation of vinylphosphonic dichloride through elimination of hydrogen chloride from 2-chloroethanephosphonic dichloride in the presence of catalysts. The catalysts used are tertiary phosphines, quaternary ammonium or phosphonium salts or alkali metal or alkaline-earth metal halides. When triphenyl phosphine is used as the catalyst, the reaction is carried out under reduced pressure at a temperature of 130.degree. to 166.degree. C. and the vinylphosphonic dichloride produced is simultaneously removed by distillation under reduced pressure. When the other catalysts are used, the process can be carried out at atmospheric pressure or reduced pressure and at temperatures of about 130.degree. to 220.degree. C. and the vinylphosphonic dichloride produced can be removed by distillation simultaneously with or subsequent to the reaction.
    • 本发明涉及通过在催化剂存在下从2-氯乙烷膦酸二氯中除去氯化氢来制备乙烯基膦酸二氯化物的方法。 所用的催化剂是叔膦,季铵或鏻盐或碱金属或碱土金属卤化物。 当使用三苯基膦作为催化剂时,反应在130〜166℃的温度下进行减压蒸馏,同时通过减压蒸馏同时除去生成的乙烯基膦酸二氯。 当使用其它催化剂时,该方法可以在大气压或低压下和在约130℃至220℃的温度下进行,并且所产生的乙烯基膦酸二氯化物可以在反应或反应后同时通过蒸馏除去。