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    Stabilization of perchloroethylene
    1.
    发明授权
    Stabilization of perchloroethylene 失效
    全氯乙烯的稳定化

    公开(公告)号：US4034051A

    公开(公告)日：1977-07-05

    申请号：US614547

    申请日：1975-09-18

    Applicant: Dominik Dempf ,  Otto Fruhwirth ,  Ludwig Schmidhammer

    Inventor： Dominik Dempf ,  Otto Fruhwirth ,  Ludwig Schmidhammer

    IPC: C07C17/42 ,  C07C17/40

    CPC classification number: C07C17/42

    Abstract: This invention relates to an improved stabilization of perchloroethylene by adding thereto a mixture of from 0.001% to 0.01% by weight of a possibly alkylated N-alkyl-morpholine and from 0.001% to 0.01% by weight of an alkylphenol; as well as the so-stabilized perchloroethylene.

    Abstract translation: 本发明涉及通过向其中加入0.001％至0.01％重量的可能烷基化的N-烷基吗啉和0.001％至0.01％重量的烷基酚的混合物来改善全氯乙烯的稳定性; 以及稳定的全氯乙烯。

    Process for preparing 1,3-diketones
    3.
    发明授权
    Process for preparing 1,3-diketones 有权
    制备1,3-二酮的方法

    公开(公告)号：US06310258B1

    公开(公告)日：2001-10-30

    申请号：US09628624

    申请日：2000-07-31

    Applicant: Dominik Dempf ,  Thomas List ,  Wolfgang Deinhammer ,  Georges Heyen

    Inventor： Dominik Dempf ,  Thomas List ,  Wolfgang Deinhammer ,  Georges Heyen

    IPC: C07C4567

    CPC classification number: C07C45/54 ,  B01J19/0026 ,  B01J19/243 ,  B01J2219/00155 ,  C07C49/14

    Abstract: The invention provides a process for preparing 1,3-diketones by rearrangement of the isomeric enol ester in a tube reactor comprising a heated portion and an unheated insulated portion which can optionally be provided with cooling means. The unheated portion of the reactor has a higher volume to surface ratio than the heated portion of the reactor. The reaction can be carried out adiabatically in the unheated portion of the reactor. The process and apparatus provide higher yields and selectivity to the 1,3-diketones.

    Abstract translation: 本发明提供了一种通过在包含加热部分和不加热的绝缘部分的管式反应器中重新排列异构烯醇酯来制备1,3-二酮的方法，该加热部分可任选地设置有冷却装置。 反应器的未加热部分比反应器的加热部分具有更高的体积与表面比。 反应可以在反应器的未加热部分中绝热地进行。 该方法和装置为1,3-二酮提供更高的产率和选择性。

    Process for separating water from mixtures thereof with vinyl acetate and acetic acid
    4.
    发明授权
    Process for separating water from mixtures thereof with vinyl acetate and acetic acid 失效
    从乙酸乙烯酯和乙酸与其混合物中分离水的方法

    公开(公告)号：US4353783A

    公开(公告)日：1982-10-12

    申请号：US201752

    申请日：1980-10-29

    Applicant: Gunter Roscher ,  Karl-Heinz Schmidt ,  Horst Langner ,  Hermann Neu ,  Aladar Lienerth ,  Dominik Dempf ,  Klaus Kaiser

    Inventor： Gunter Roscher ,  Karl-Heinz Schmidt ,  Horst Langner ,  Hermann Neu ,  Aladar Lienerth ,  Dominik Dempf ,  Klaus Kaiser

    IPC: C07C67/055 ,  C07C67/54 ,  C07C69/15 ,  B01D3/36

    CPC classification number: C07C67/055 ,  C07C67/54 ,  B01J2219/1942

    Abstract: Process for separating water from a gas mixture, obtained in the manufacture of vinyl acetate by reacting ethylene with acetic acid and oxygen in contact with catalysts containing palladium or palladium compounds in the gaseous phase said gas mixture consisting essentially of acetic acid, vinyl acetate, water, carbon dioxide and ethylene, wherein(a) the gas mixture leaving the reaction zone is condensed to give a condensate containing the major portion of acetic acid, vinyl acetate and water and(b) an acetic acid solution containing the residual amount of vinyl acetate and water being prepared by absorption of the non-condensed gas in acetic acid, is characterized in that(c) the condensate obtained in step (a) and the solution obtained in step (b) are introduced separately from each other into the same distillation column, the feeding point of the condensate being above the feeding point of the solution, the water is distilled off at the head of said column as azeotrope together with the vinyl acetate and(d) the water phase is removed from the distillate separating into a water phase and a vinyl acetate phase.

    Abstract translation: 从气相混合物中分离水的方法，所述气体混合物是通过使乙烯与乙酸和氧气在气相中与含有钯或钯化合物的催化剂接触而在乙酸乙烯酯的制备中获得的，所述气体混合物主要由乙酸，乙酸乙烯酯，水 ，二氧化碳和乙烯，其中（a）离开反应区的气体混合物被冷凝，得到含有主要部分的乙酸，乙酸乙烯酯和水的冷凝物和（b）含有残留量的乙酸乙烯酯的乙酸溶液 和通过在乙酸中吸收非冷凝气体制备的水，其特征在于（c）将步骤（a）中获得的冷凝物和步骤（b）中获得的溶液彼此分开引入相同的蒸馏 柱，冷凝水的进料点高于溶液的进料点，水在所述塔的头部被蒸馏出来，作为共沸物一起 h乙酸乙烯酯和（d）从分离成水相和乙酸乙烯酯相的馏出物中除去水相。

    Stabilized perchloroethylene
    5.
    发明授权
    Stabilized perchloroethylene 失效
    稳定的全氯乙烯

    公开(公告)号：US4220607A

    公开(公告)日：1980-09-02

    申请号：US19388

    申请日：1979-03-12

    Applicant: Dominik Dempf ,  Rudolf Knabl ,  Ludwig Schmidhammer ,  Wilhelm Mack

    Inventor： Dominik Dempf ,  Rudolf Knabl ,  Ludwig Schmidhammer ,  Wilhelm Mack

    IPC: C07C17/42 ,  C07C17/40

    CPC classification number: C07C17/42

    Abstract: Stabilized perchloroethylene containing 0.001 to 0.1% by weight of N-alkylmorpholine, 0.001 to 0.01% by weight of alkylphenols, 0.0005 to 0.002% by weight of diisopropylamine, and 0.05 to 0.5% by weight of cyclohexeneoxide. By stabilization with the mixture of stabilizers, the perchloroethylene is stabilized to an extraordinary degree against attack by metals, particularly, decomposition through oxidation in contact with metals or metal salts, in some cases also upon exposure to light. A further improvement of the combined stabilizing action can be obtained by the addition of 0.005 to 0.1% by weight of epoxipropanol.

    Abstract translation: 含有0.001〜0.1重量％的N-烷基吗啉，0.001〜0.01重量％的烷基酚，0.0005〜0.002重量％的二异丙基胺和0.05〜0.5重量％的环己烯氧化物的稳定的全氯乙烯。 通过用稳定剂的混合物稳定化，全氯乙烯被稳定到非常程度以抵抗金属的侵蚀，特别是通过与金属或金属盐接触的氧化分解，在一些情况下也是在暴露于光下时分解。 通过加入0.005〜0.1重量％的环氧丙醇可以进一步提高组合的稳定作用。

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