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48 条记录 (耗时 0.025 秒)

    Separation of a mixture of C.sub.4 -hydrocarbons by extractive distillation
    31.
    发明授权
    Separation of a mixture of C.sub.4 -hydrocarbons by extractive distillation 失效
    通过萃取蒸馏分离C {HD 4 {B-烃的混合物

    公开(公告)号：US4162198A

    公开(公告)日：1979-07-24

    申请号：US906469

    申请日：1978-05-17

    申请人： Dieter Stockburger ,  Klaus Volkamer ,  Detlef Bender ,  Klaus-Juergen Schneider ,  Harald Schwentker ,  Ulrich Wagner ,  Hans-Martin Weitz

    发明人： Dieter Stockburger ,  Klaus Volkamer ,  Detlef Bender ,  Klaus-Juergen Schneider ,  Harald Schwentker ,  Ulrich Wagner ,  Hans-Martin Weitz

    IPC分类号： B01D3/40 ,  C07C1/00 ,  C07C7/08 ,  C07C9/00 ,  C07C11/00 ,  C07C11/167 ,  C07C67/00 ,  B01D3/06

    CPC分类号： C07C7/08 ,  B01D3/40 ,  Y10S203/20

    摘要： A process for separating, by means of a selective solvent, a mixture of C.sub.4 -hydrocarbons which contains some hydrocarbons which are more soluble in the selective solvent and some which are less soluble therein, in which process the hydrocarbon mixture is separated, in an extractive distillation zone, into a top product which contains the less soluble hydrocarbons and an extract which contains the more soluble hydrocarbons and the selective solvent, the extract, taken off as the bottom product, is subjected to a flash evaporation and the resulting vapor component of the extract is recycled to the extractive distillation zone while the liquid phase remaining after the flash evaporation is fed to a solvent recovery zone, in which the liquid phase obtained from the flash evaporation is separated into a product containing the hydrocarbons and, as the bottom product, the selective solvent which has been freed from the hydrocarbons, the resulting selective solvent is recycled to the extractive distillation zone and the product which is obtained from the solvent recovery zone and contains the hydrocarbons is partially or completely recycled to the extractive distillation zone, after increasing the pressure in a compression zone, in which process the extract taken off the extractive distillation zone is brought, prior to the flash evaporation to a higher pressure than the pressure in the extractive distillation zone and thereafter the extract which is under this higher pressure is heated, in a heat exchange zone, by indirect heat exchange with the selective solvent obtained as the bottom product from the solvent recovery zone, and the heated extract is subsequently let down, in the flash evaporation, to a pressure which is at least equal to the pressure in the extractive distillation zone and is higher than the pressure in the solvent recovery zone.

    摘要翻译： 通过选择性溶剂分离出含有一些较易溶于选择性溶剂的烃和一些较不溶于其中的烃类的混合物的混合物的方法，在该方法中，烃混合物在萃取过程中分离 蒸馏区，成为含有较少溶解性烃的顶部产物和含有较多可溶性烃和选择性溶剂的提取物，作为底部产物取出的萃取物进行闪蒸，并将得到的蒸气成分 萃取液再循环到萃取蒸馏区，闪蒸蒸发后剩余的液相被送入溶剂回收区，其中将从闪蒸蒸发获得的液相分离成含有烃的产物，作为底部产物， 已经从烃中除去的选择性溶剂，所得到的选择性溶剂被再循环到萃取物中 蒸馏区和从溶剂回收区获得并且含有烃的产物在增加压缩区中的压力之后部分或完全再循环到萃取蒸馏区，在该过程中，提取物从萃取蒸馏区被带走 在闪蒸蒸发到比萃取蒸馏区中的压力高的压力之前，然后将在该较高压力下的提取物在热交换区域中与作为底部产物获得的选择性溶剂进行间接热交换 然后将被加热的提取物在闪蒸中降至至少等于萃取蒸馏区压力的压力，并高于溶剂回收区的压力。

    Manufacture of glycol esters
    33.
    发明授权
    Manufacture of glycol esters 失效
    乙二醇酯的制造

    公开(公告)号：US4239911A

    公开(公告)日：1980-12-16

    申请号：US800022

    申请日：1977-05-24

    申请人： Hans-Martin Weitz ,  Juergen Hartig

    发明人： Hans-Martin Weitz ,  Juergen Hartig

    IPC分类号： C07C69/08 ,  C07C69/01 ,  C07C69/16 ,  C07C67/05

    CPC分类号： C07C67/00

    摘要： Alkylene glycol dicarboxylates are obtained by reacting carboxylic acid esters of monohydric or polyhydric aliphatic short-chain alcohols with an olefin and oxygen in the presence of a catalyst, a hydrolyzing agent and water.

    摘要翻译： 通过在催化剂，水解剂和水的存在下使一元或多元脂肪族短链醇的羧酸酯与烯烃和氧反应，得到二醇二醇二醇酯。

    Manufacture of propylene oxide
    35.
    发明授权
    Manufacture of propylene oxide 失效
    环氧丙烷的制造

    公开(公告)号：US4158008A

    公开(公告)日：1979-06-12

    申请号：US879514

    申请日：1978-02-21

    申请人： Hans-Martin Weitz ,  Juergen Hartig ,  Rolf Platz

    发明人： Hans-Martin Weitz ,  Juergen Hartig ,  Rolf Platz

    IPC分类号： C07D301/02 ,  C07D301/32

    CPC分类号： C07D301/02

    摘要： Propylene oxide is prepared by elimination of acetic acid from propylene glycol monoacetates in the presence of a base. In contrast to the conventional elimination of acetic acid in the gas phase, the present reaction is carried out in the liquid phase in a high-boiling solvent. Because of the smaller reaction space required, the reaction in the liquid phase is simpler.

    摘要翻译： 环氧丙烷通过在碱存在下从丙二醇单乙酸酯中除去乙酸来制备。 与在气相中常规消除乙酸相反，本反应在液相中在高沸点溶剂中进行。 由于需要较小的反应空间，液相中的反应更简单。

    Preparation of butane-1,4-diol
    39.
    发明授权
    Preparation of butane-1,4-diol 失效
    丁烷-1,4-二醇的制备

    公开(公告)号：US4594462A

    公开(公告)日：1986-06-10

    申请号：US748998

    申请日：1985-06-26

    申请人： Rolf Schnabel ,  Hans-Martin Weitz

    发明人： Rolf Schnabel ,  Hans-Martin Weitz

    IPC分类号： C07C29/136 ,  B01J23/00 ,  B01J23/72 ,  C07B61/00 ,  C07C27/00 ,  C07C29/149 ,  C07C31/20 ,  C07C67/00

    CPC分类号： C07C29/149

    摘要： Butane-1,4-diol is prepared by catalytic hydrogenation of dibutyl succinate by a process in which hydrogenation is terminated before complete conversion is reached, butanol is distilled off from the reaction mixture, the liquid distillation residue is cooled to below 108.degree. C., the upper phase, which is formed as a result of phase separation and essentially consists of dibutyl succinate, is recycled to the hydrogenation, and the butane-1,4-diol is obtained from the lower phase, which essentially consists of this compound, by fractional distillation under reduced pressure.

    摘要翻译： 丁烷-1,4-二醇通过二丁基琥珀酸二丁酯的催化氢化制备，其中在完成转化之前终止氢化的方法，从反应混合物中蒸馏出丁醇，将液体蒸馏残余物冷却至低于108℃。 作为相分离结果而形成的上层，由琥珀酸二丁酯基本上由二丁基琥珀酸酯组成，再循环到氢化中，丁烷-1,4-二醇由下层得到，该相基本上由该化合物组成， 通过减压下的分馏。