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    Production of 2-chlorobutadiene-1,3
    1.
    发明授权
    Production of 2-chlorobutadiene-1,3 失效
    生产2-氯丁二酮-1,3

    公开(公告)号：US3978146A

    公开(公告)日：1976-08-31

    申请号：US548420

    申请日：1975-02-10

    Applicant: Alexander Ohorodnik ,  Udo Dettmeier ,  Klaus Gehrmann ,  Heinz-Josef Berns

    Inventor： Alexander Ohorodnik ,  Udo Dettmeier ,  Klaus Gehrmann ,  Heinz-Josef Berns

    IPC: C07C17/25 ,  C07C17/38 ,  C07C21/21

    CPC classification number: C07C17/25 ,  C07C17/383 ,  C07C21/21

    Abstract: Production of 2-chlorobutadiene-(1,3) by the dehydrochlorination of 3,4-dichlorobutene-(1) in an aqueous solution of an alkali metal or alkaline earth metal hydroxide in the presence of an alcohol having between 2 and 4 carbon atoms at elevated temperature, and distilling off resulting 2-chlorobutadiene-(1,3). To this end, a reaction zone is continuously supplied with 3,4-dichlorobutene-(1), an alcohol and the aqueous hydroxide solution and the whole is heated to boiling therein while passing a stream of inert gas therethrough; resulting 2-chlorobutadiene-(1,3) is distilled off from the reaction zone and fractionated until pure; a reaction mixture which commences to separate into two layers comprising an upper layer and a lower layer is retained in the reaction zone; aqueous alcohol in excess is continuously removed from said upper layer through an overflow and the alcohol is recovered; the lower layer consisting of an aqueous/alkaline solution of unreacted hydroxide, chloride salt and minor amounts of alcohol is continuously removed through the bottom of the reaction zone; the lower layer is distilled so as to concentrate it; precipitated chloride salt is isolated, and concentrated liquor is recovered.

    Tertiary phosphine
    2.
    发明授权
    Tertiary phosphine 失效
    叔膦

    公开(公告)号：US3948980A

    公开(公告)日：1976-04-06

    申请号：US475275

    申请日：1974-05-31

    Applicant: Udo Dettmeier ,  Hans-Jerg Kleiner

    Inventor： Udo Dettmeier ,  Hans-Jerg Kleiner

    IPC: C07F9/53 ,  C08K5/5397

    CPC classification number: C08K5/5397 ,  C07F9/5304

    Abstract: Novel tertiary phosphine oxides containing in one radical at least two hydroxy groups or functional derivatives thereof are obtained by adding olefins having at least two hydroxy groups or functional derivatives thereof to secondary phosphine oxides at elevated temperatures in the presence of a free radical generator. The products are useful as flame-retardant agents and intermediates for anti-corrosive agents and pesticides.

    Abstract translation: 通过在自由基发生剂的存在下，在升高的温度下，通过将具有至少两个羟基的烯烃或其官能衍生物加成到具有一个基团的至少两个羟基或其官能衍生物中的新型叔膦氧化物。 该产品可用作阻燃剂和抗腐蚀剂和农药的中间体。

    Process for preparing dimethyl vinylphosphonate from dimethyl 2-acetoxyethanephosphonate
    3.
    发明授权
    Process for preparing dimethyl vinylphosphonate from dimethyl 2-acetoxyethanephosphonate 失效
    由2-乙酰氧基乙烷膦酸二甲酯制备二甲基乙烯基膦酸酯的方法

    公开(公告)号：US5763637A

    公开(公告)日：1998-06-09

    申请号：US587645

    申请日：1996-01-17

    Applicant: Knut Riedel ,  Udo Dettmeier ,  Guenter Roscher

    Inventor： Knut Riedel ,  Udo Dettmeier ,  Guenter Roscher

    IPC: C07F9/40

    CPC classification number: C07F9/4015

    Abstract: The invention relates to a process for preparing dimethyl vinylphosphonate by thermal dissociation of dimethyl 2-acetoxyethanephosphonate in the gas phase, which comprises vaporizing dimethyl 2-acetoxyethanephosphonate and dissociating it without catalysis at a temperature of from 400.degree. to 700.degree. C. into dimethyl vinylphosphonate and acetic acid.

    Abstract translation: 本发明涉及一种通过在气相中热解2-乙酰氧基乙基膦酸二甲酯来制备二甲基乙烯基膦酸酯的方法，该方法包括将2-乙酰氧基乙烷膦酸二甲酯蒸发，并在400-700℃的温度下将其解离成二甲基乙烯基膦酸酯 和乙酸。

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