利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

65 条记录 (耗时 0.031 秒)

    Separation of molybdenum
    1.
    发明授权
    Separation of molybdenum 失效
    分离钼

    公开(公告)号：US5232559A

    公开(公告)日：1993-08-03

    申请号：US793902

    申请日：1991-11-18

    申请人： William A. Smith ,  David L. Miller ,  Robert A. Meyer

    发明人： William A. Smith ,  David L. Miller ,  Robert A. Meyer

    IPC分类号： B01J31/40 ,  B01J37/34 ,  B01J38/48 ,  B01J38/68 ,  C25C1/22

    CPC分类号： B01J31/0201 ,  B01J31/0202 ,  B01J31/0239 ,  B01J31/34 ,  B01J31/4015 ,  B01J31/4076 ,  B01J37/348 ,  B01J38/48 ,  B01J38/68 ,  C25C1/22 ,  B01J2231/72

    摘要： An organic solution of a soluble molybdenum compound is ammonated with ammonia, ammonium hydroxide and/or an ammonium salt in order to significantly reduce the electrical resistance of the solution and a direct electric current is passed therethrough in order to collect a significant amount of the molybdenum in solid form at the negative electrode. Preferably, an epoxidation reaction product formed by the molybdenum catalyzed reaction of propylene with tertiary butyl hydroperoxide to provide propylene oxide and tertiary butyl alcohol is separated by distillation into a propylene fraction, a propylene oxide fraction, a tertiary butyl alcohol fraction and a heavy liquid distillation fraction containing substantially all of the dissolved molybdenum catalyst, the heavy liquid distillation fraction is saturated with ammonia to precipitate the molybdenum therefrom, the precipitated molybdenum is removed from the ammonated heavy distillation fraction and a direct electric current is passed through the remaining liquid portion of the ammonated fraction in an electrolytic cell in order to collect a significant portion of the remaining molybdenum residually dissolved therein at the cathode.

    摘要翻译： 可溶性钼化合物的有机溶液用氨，氢氧化铵和/或铵盐氨化，以显着降低溶液的电阻，并且直流电流通过其中以收集显着量的钼 在固体形式的负极。 优选地，通过丙烯与叔丁基过氧化氢的钼催化反应形成环氧丙烷和叔丁醇形成的环氧化反应产物通过蒸馏分离成丙烯馏分，环氧丙烷馏分，叔丁醇馏分和重液体蒸馏 馏分含有基本上所有的溶解的钼催化剂，重液体蒸馏馏分用氨饱和，从中沉淀出钼，从氨化的重馏分中除去沉淀的钼，直流电流通过 在电解池中的氨化部分，以便在阴极收集残留的钼的很大部分。

    Plural stage purification of propylene oxide
    3.
    发明授权
    Plural stage purification of propylene oxide 失效
    环氧丙烷的多级纯化

    公开(公告)号：US5262017A

    公开(公告)日：1993-11-16

    申请号：US47910

    申请日：1993-04-19

    申请人： Robert A. Meyer ,  William A. Smith ,  Mark A. Mueller ,  Gregory B. Demoll

    发明人： Robert A. Meyer ,  William A. Smith ,  Mark A. Mueller ,  Gregory B. Demoll

    IPC分类号： C07B63/00 ,  B01D3/40 ,  C07D301/12 ,  C07D301/32 ,  C07D303/04

    CPC分类号： B01D3/40 ,  C07D301/32

    摘要： Impure propylene oxide is purified by a distillation process wherein it is (a) extractively distilled in a first column using a C.sub.2 to C.sub.6 alkylene glycol extractive distillation agent to form a first overhead fraction comprising propylene oxide, C.sub.5 -C.sub.7 hydrocarbons methanol, water and oxygen-containing impurities, (b) wherein the first overhead fraction is separated in a second column into a second overhead fraction comprising most of the pentanes, pentenes and oxygen-containing impurities and a partially purified propylene oxide bottoms fraction comprising propylene oxide, hexenes, hexanes, and only residual quantities of pentenes and pentanes, (c) wherein the partially purified bottoms fraction is extracting distilled in a third column using a C.sub.7 -C.sub.10 alkane hydrocarbon extractive distillation agent to provide a further purified bottoms fraction containing substantially all of the propylene oxide, hexenes, hexanes charged to the third distillation column, and (d) the further purified bottoms fraction is extractively distilled in a fourth column using a C.sub.7 to C.sub.10 alkane hydrocarbon extractive distillation agent to provide a purified propylene oxide overhead fraction consisting essentially of propylene oxide.

    摘要翻译： 不纯的环氧丙烷通过蒸馏方法纯化，其中（a）使用C2至C6亚烷基二醇萃取蒸馏器在第一塔中进行萃取蒸馏以形成包含环氧丙烷，C 5 -C 7烃甲醇，水和氧的第一塔顶馏分 （b），其中将第一塔顶馏分在第二塔中分离成包含大部分戊烷，戊烯和含氧杂质的第二塔顶馏分和部分纯化的环氧丙烷底部馏分，其包含环氧丙烷，己烯，己烷 ，并且仅剩余量的戊烯和戊烷，（c）其中部分纯化的塔底馏分在第三塔中使用C 7 -C 10烷烃烃萃取蒸馏器提取蒸馏，以提供含有基本上所有环氧丙烷的进一步纯化的塔底馏分 ，己烯，加入第三蒸馏塔的己烷，和（d）进一步纯化的bo 在第四列中使用C 7至C 10烷烃烃萃取蒸馏器对塔底馏分进行萃取蒸馏，以提供基本上由环氧丙烷组成的纯化的环氧丙烷塔顶馏分。

    Ditertiary butyl peroxide recovery
    5.
    发明授权
    Ditertiary butyl peroxide recovery 失效
    二丁基过氧化物回收

    公开(公告)号：US4810809A

    公开(公告)日：1989-03-07

    申请号：US945629

    申请日：1986-12-23

    申请人： John R. Sanderson ,  Robert A. Meyer ,  William A. Smith ,  Edward T. Marquis

    发明人： John R. Sanderson ,  Robert A. Meyer ,  William A. Smith ,  Edward T. Marquis

    IPC分类号： C07C29/80 ,  C07C407/00 ,  C07D301/19

    CPC分类号： C07D301/19 ,  C07C29/80 ,  C07C407/003

    摘要： It has been discovered in accordance in accordance with the present invention that a tertiary butyl alcohol/ditertiary butyl peroxide azeotrope may be recovered from a product containing tertiary butyl alcohol and ditertiary butyl peroxide by distilling the tertiary butyl alcohol product to obtain an overhead fraction containing substantially all of the ditertiary butyl peroxide/tertiary butyl alcohol azeotrope and other contaminants.It has been further discovered in accordance with the present invention that the ditertiary butyl peroxide can be recovered from the distillate fraction by extraction with ethylene glycol (e.g., in a countercurrent ethylene glycol extraction tower) to provide a ditertiary butyl peroxide product of any desired degree of purity.

    摘要翻译： 根据本发明已经发现，通过蒸馏叔丁醇产物可从含有叔丁醇和二叔丁基过氧化物的产物中回收叔丁醇/二叔丁基过氧化物共沸物，得到基本上含有 所有二叔丁基过氧化物/叔丁醇共沸物等杂质。 根据本发明进一步发现，二乙基丁基过氧化物可以通过用乙二醇（例如，在逆流乙二醇萃取塔）中提取从馏出物馏分中回收，以提供任何所需程度的二叔丁基过氧化物产物 的纯度。

    Purification of propylene oxide using an aqueous acetone extractive distillatin agent
    7.
    发明授权
    Purification of propylene oxide using an aqueous acetone extractive distillatin agent 失效
    使用含水丙酮萃取蒸馏液进行环氧丙烷的纯化

    公开(公告)号：US4971661A

    公开(公告)日：1990-11-20

    申请号：US424423

    申请日：1989-10-20

    申请人： Robert A. Meyer ,  Kenneth P. Keating ,  William A. Smith ,  Robert M. Steinberg

    发明人： Robert A. Meyer ,  Kenneth P. Keating ,  William A. Smith ,  Robert M. Steinberg

    IPC分类号： C07D303/04 ,  B01D3/40 ,  C07D301/32

    CPC分类号： B01D3/40 ,  C07D301/32

    摘要： An impure propylene oxide feedstock contaminated with from about 50 to about 1000 ppm of methanol and from about 0 to about 1 wt. % of acetone is charged to the lower half of an extractive distillation column containing at least about 25 theoretical plates and an extractive distillation agent consisting essentially of a blend of acetone and water (acetone/water blend) containing about 20 to about 30 wt. % of acetone and, correspondingly, about 80 to about 70 wt. % of water is charged to the tower at a point 4 to 7 theoretical stages above the impure propylene oxide feed point; the extractive distillation agent being introduced into the extractive distillation column in the ratio of said feedstock to said extractive distillation agent of from about 5:1 to about 20:1, whereby an overhead distillate fraction is obtained consisting essentially of propylene oxide contaminated with not more than about 60 ppm of methanol, not more than about 0.02 wt. % of acetone and not more than about 0.3 wt. % of water.

    摘要翻译： 由约50至约1000ppm的甲醇和约0至约1重量％的污染的不纯的环氧丙烷原料。 将丙酮的百分比加入到含有至少约25理论塔板的萃取蒸馏塔的下半部分，和萃取蒸馏剂基本上由丙酮和水（丙酮/水共混物）的混合物组成，所述共混物含有约20至约30wt。 丙酮的百分比，相应地，约80至约70重量％ 在不纯的环氧丙烷进料点之上的4到7个理论阶段的点将％的水加入塔中; 所述萃取蒸馏剂以所述原料与所述萃取蒸馏器的比例从约5:1至约20:1引入萃取蒸馏塔，由此得到主要由不受污染的环氧丙烷组成的塔顶馏分馏分 大于约60ppm的甲醇，不大于约0.02wt。 丙酮％，不大于约0.3wt。 ％的水。