Enzyme catalyzed synthesis of methyl urethanes
    2.
    发明授权
    Enzyme catalyzed synthesis of methyl urethanes 失效
    酶催化合成甲基氨基甲酸酯

    公开(公告)号:US5002880A

    公开(公告)日:1991-03-26

    申请号:US461721

    申请日:1990-01-08

    申请人: Robert W. Mason

    发明人: Robert W. Mason

    IPC分类号: C12P13/00

    CPC分类号: C12P13/02 C12P13/00

    摘要: The present invention relates to a process for making an isocyanate which comprises the steps of: (a) reacting an amine with dimethyl carbonate in the presence of a hydrolase enzyme catalyst, preferably at a temperature not exceeding 50.degree. C. to form a methyl urethane, and (b) subjecting said methyl urethane to an elevated temperature in order to thermally cleave the urethane to produce an isocyanate.

    摘要翻译: 本发明涉及一种制备异氰酸酯的方法,其包括以下步骤:(a)在水解酶催化剂存在下,优选在不超过50℃的温度下使胺与碳酸二甲酯反应,形成甲基氨基甲酸酯 ,和(b)使所述甲基氨基甲酸酯经受高温以热裂解聚氨酯以产生异氰酸酯。

    Process for synthesis of chlorodifluoroamine
    3.
    发明授权
    Process for synthesis of chlorodifluoroamine 失效
    合成氯二氟胺的方法

    公开(公告)号:US3969487A

    公开(公告)日:1976-07-13

    申请号:US279696

    申请日:1963-04-26

    IPC分类号: C01B21/09 C01B21/52 C01B7/00

    CPC分类号: C01B21/09

    摘要: A process for making chlorodifluoroamine by introducing a mixture of an inert gas and elemental fluorine into a reaction zone containing a mixture or alkali metal azide and alkali metal chloride at a reaction temperature not substantially above 50.degree.C.

    摘要翻译: 在不超过50℃的反应温度下,通过将惰性气体和元素氟的混合物引入到含有混合物或碱金属叠氮化物和碱金属氯化物的反应区中来制备氯二氟胺的方法。

    Extractive distillation of conjugated diene
    4.
    发明授权
    Extractive distillation of conjugated diene 失效
    共轭二烯的萃取蒸馏

    公开(公告)号:US08076526B2

    公开(公告)日:2011-12-13

    申请号:US12383904

    申请日:2009-03-30

    申请人: Robert W. Mason

    发明人: Robert W. Mason

    IPC分类号: C07C7/08

    CPC分类号: C07B63/00

    摘要: A process for isolating a conjugated diene from a hydrocarbon mixture is disclosed. The process comprises distilling the hydrocarbon mixture in the presence of an extraction solvent comprising an N,N-dialkyl aliphatic amide and from 12 to 50 weight percent furfural to separate a distillate and a conjugated diene-rich extract; and recovering the conjugated diene from the extract.

    摘要翻译: 公开了一种从烃混合物中分离共轭二烯的方法。 该方法包括在包含N,N-二烷基脂族酰胺和12至50重量%糠醛的萃取溶剂的存在下蒸馏烃混合物以分离馏出物和富含共轭二烯的提取物; 并从提取物中回收共轭二烯。

    Process for the production of dinitrobenzene and mononitrobenzene
    5.
    发明授权
    Process for the production of dinitrobenzene and mononitrobenzene 失效
    生产二硝基苯和单硝基苯的方法

    公开(公告)号:US5488187A

    公开(公告)日:1996-01-30

    申请号:US290575

    申请日:1994-08-15

    申请人: Robert W. Mason

    发明人: Robert W. Mason

    CPC分类号: C07C201/08 C07C201/16

    摘要: Aromatic nitration reactions and, more specifically, a process for nitrating benzene to produce dinitrobenzene or mononitrobenzene in the absence of sulfuric acid and in the absence of any dipolar aprotic solvent.

    摘要翻译: 更具体地说,是在不存在硫酸的情况下和在不存在任何偶极非质子溶剂的情况下硝化苯以产生二硝基苯或单硝基苯的方法。

    Process for the production of dinitrotoluene
    8.
    发明授权
    Process for the production of dinitrotoluene 失效
    生产二硝基甲苯的方法

    公开(公告)号:US5001272A

    公开(公告)日:1991-03-19

    申请号:US402322

    申请日:1989-09-05

    申请人: Robert W. Mason

    发明人: Robert W. Mason

    IPC分类号: C07C201/16 C07C205/06

    CPC分类号: C07C201/08 C07C201/16

    摘要: Aromatic nitration reactions and, more specifically, a process for nitrating toluene to dinitrotoluene. The process involves a liquid phase nitration reaction of anhydrous nitric acid and toluene in a molar ratio of between about 5:1 and about 9:1 of nitric acid to toluene in a reactor at a reaction temperature of between about 40.degree. C. and about 70.degree. C., in the absence of sulfuric acid and in the absence of any dipolar organic solvent, to produce a mixture containing dinitrotoluene, and isolating said dinitrotoluene by contacting said mixture with a phase separating effective amount of an alkali or alkaine earth metal nitrate salt to cause phase separation of said dinitrotoluene.

    摘要翻译: 芳香硝化反应,更具体地说,是将甲苯硝化成二硝基甲苯的方法。 该方法包括在反应器中在约40℃至约约40℃的反应温度下,反应器中无水硝酸和甲苯以约5:1至约9:1的硝酸与甲苯的摩尔比进行液相硝化反应 在不存在硫酸的情况下,在不存在任何偶极有机溶剂的情况下,制备含有二硝基甲苯的混合物,并通过使所述混合物与相分离有效量的碱金属或碱土金属的硝酸盐相分离来分离所述二硝基甲苯 盐引起所述二硝基甲苯的相分离。

    Extractive distillation of conjugated diene
    10.
    发明申请
    Extractive distillation of conjugated diene 失效
    共轭二烯的萃取蒸馏

    公开(公告)号:US20100243424A1

    公开(公告)日:2010-09-30

    申请号:US12383904

    申请日:2009-03-30

    申请人: Robert W. Mason

    发明人: Robert W. Mason

    IPC分类号: B01D3/40

    CPC分类号: C07B63/00

    摘要: A process for isolating a conjugated diene from a hydrocarbon mixture is disclosed. The process comprises distilling the hydrocarbon mixture in the presence of an extraction solvent comprising an N,N-dialkyl aliphatic amide and from 12 to 50 weight percent furfural to separate a distillate and a conjugated diene-rich extract; and recovering the conjugated diene from the extract.

    摘要翻译: 公开了一种从烃混合物中分离共轭二烯的方法。 该方法包括在包含N,N-二烷基脂族酰胺和12至50重量%糠醛的萃取溶剂的存在下蒸馏烃混合物以分离馏出物和富含共轭二烯的提取物; 并从提取物中回收共轭二烯。