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    Process for the production of isobutyric acid anhydride
    1.
    发明授权
    Process for the production of isobutyric acid anhydride 失效
    生产异丁酸酐的方法

    公开(公告)号：US4303594A

    公开(公告)日：1981-12-01

    申请号：US143693

    申请日：1980-04-25

    申请人： Richard V. Norton ,  Lee R. Zehner ,  Ralph F. Pascoe ,  John E. Corn, Jr. ,  Dace Grote

    发明人： Richard V. Norton ,  Lee R. Zehner ,  Ralph F. Pascoe ,  John E. Corn, Jr. ,  Dace Grote

    IPC分类号： C07C51/56 ,  C07C51/58 ,  C07C51/54

    CPC分类号： C07C51/56 ,  C07C51/58

    摘要： A process for the production of isobutyric acid anhydride in which propylene is initially carbonylated in the presence of a substantial molar excess of liquid anhydrous hydrogen fluoride to provide a reaction mixture of isobutyroyl fluoride and unreacted hydrogen fluoride. Following distillation of the reaction mixture to recover a recycle stream of hydrogen fluoride, the isobutyroyl fluoride residue is partially hydrolyzed in the presence of a hydrogen fluoride acceptor resulting in a hydrolysis product consisting essentially of isobutyroyl fluoride, isobutyric acid anhydride and a hydrogen fluoride complex of said acceptor. Following removal of the solid complex, the hydrolysis product is fractionally distilled to yield an overhead fraction of isobutyroyl fluoride for reuse in the hydrolysis reaction.

    摘要翻译： 一种生产异丁酸酐的方法，其中丙烯最初在相当摩尔过量的液体无水氟化氢存在下进行羰基化，以提供异丁酰氟和未反应的氟化氢的反应混合物。 在蒸馏反应混合物以回收氟化氢的再循环流之后，在氟化氢受体的存在下将异丁酰氟化物残余物部分水解，得到基本上由异丁酰氟，异丁酸酐和氟化氢络合物组成的水解产物 说接受者 除去固体络合物后，水解产物被分馏，得到异丁酰氟的塔塔馏分，用于在水解反应中重新使用。

    Process for the carbonylation of propylene
    2.
    发明授权
    Process for the carbonylation of propylene 失效
    丙烯羰基化方法

    公开(公告)号：US4749525A

    公开(公告)日：1988-06-07

    申请号：US881425

    申请日：1986-07-02

    申请人： Ralph F. Pascoe ,  Carlo Scaccia

    发明人： Ralph F. Pascoe ,  Carlo Scaccia

    IPC分类号： C07C51/58

    CPC分类号： C07C51/58 ,  Y02P20/582

    摘要： A process for the improvement in the utilization of carbon monoxide and for the utilization of propylene having varying grades of purity in the carbonylation of propylene with carbon monoxide and hydrogen fluoride to form isobutyryl fluoride in a carbonylation reactor whereby the effluent from the reactor is (a) passed into a first phase separator where the effluent is separated into an overhead gaseous stream and a bottom liquid stream which contains unreacted carbon monoxide, (b) the bottom liquid stream from (a) is passed into a second reactor where it is contacted with a gaseous stream which contains propylene and allowing essentially all of the propylene to react, (c) the effluent from the second reactor is passed to a second phase separator where overhead gases are separated from liquid bottoms, (d) the liquid bottoms from the second phase separator are passed to a degassing pot where overhead gases are removed and the liquid bottoms stream which is essentially isobutyryl fluoride is taken to recovery, (e) the overhead gases from (d) are optionally mixed with inert gases and the stream is recycled to the hydrogen fluoride fed to the carbonylation reactor and/or recycled back to the gaseous stream in (b), (f) the gases from overhead stream in (a) are passed to a compressor and then to the recycle gaseous stream from (e), (g) the overhead gases from (e) are divided into a first portion which is sent to recycle as in (e) and a second portion which is sent to a refrigeration unit where said second portion into a bottom stream of less volatile materials and an overhead stream of volatile materials, a portion of the bottoms stream is added to the isobutyryl fluoride stream for recovery in (d), and the overhead, less volatile stream from (g) is sent to waste disposal is described.

    摘要翻译： 在羰基化反应器中丙烯与一氧化碳和氟化氢的羰基化反应中使用一氧化碳和利用具有不同等级的纯度丙烯的方法，其中来自反应器的流出物为（a ）通入第一相分离器，其中流出物被分离成塔顶气态物流和含有未反应的一氧化碳的底部液体物流，（b）来自（a）的底部液体物流进入第二反应器，在其中与第 含有丙烯并使基本上所有丙烯反应的气流，（c）来自第二反应器的流出物被传送到第二相分离器，其中顶部气体与液体底部分离，（d）来自第二反应器的液体塔底物 将相分离器送入去除塔顶气体的脱气罐，并将基本上为异丁酰氟的液体塔底物流 e被采取回收，（e）来自（d）的塔顶气体任选地与惰性气体混合，并将该物流再循环到进料到羰基化反应器中的氟化氢和/或循环回至（b）中的气流， （f）将来自（a）中塔顶流的气体送入压缩机，然后送至（e）的循环气流，（g）将来自（e）的塔顶气体分成第一部分， 如（e）和第二部分，其被传送到制冷单元，其中所述第二部分成为不易挥发的物质的底部流和挥发性物质的顶部物流，一部分底部物流被加入到异丁酰氟流中 描述（d）中的回收和来自（g）的塔顶馏出物，较不易挥发的物流被送入废物处理。

    Continuous esterification of methacrylic acid and product recovery
    3.
    发明授权
    Continuous esterification of methacrylic acid and product recovery 失效
    连续酯化甲基丙烯酸和产物回收

    公开(公告)号：US4733004A

    公开(公告)日：1988-03-22

    申请号：US877621

    申请日：1986-06-23

    申请人： Ralph F. Pascoe

    发明人： Ralph F. Pascoe

    IPC分类号： C07C67/08

    CPC分类号： C07C67/08

    摘要： A process for the esterification of an olefinically unsaturated carboxylic acid, such as methacrylic acid, with a lower alkanol, such as methanol, to form the corresponding ester over a solid cationic catalyst in which the carboxylic acid is used in excess of the alkanol on a molar basis, the improvement which comprises: (A) employing a hydraulically fluidized solid catalyst reactor for the continuous esterification reaction, (B) including in the esterification reaction a solvent which is a hydrocarbon having from 6 to 15 carbon atoms, (C) passing the effluent from the esterification reactor into a first distillation column in which the ester product and water by-product are taken overhead, (D) taking the unesterified carboxylic acid, solvent, and heavies from the bottom of the first distillation column, (E) separating the water from the ester in the overhead from (C) and recoverying the ester product, (F) separating heavies from the carboxylic acid-solvent from (D) in a second distillation column, (G) recycling the carboxylic acid-solvent from (F) back to the esterification reactor (A), and (H) disposing of the heavies from (F) is described.

    摘要翻译： 烯烃不饱和羧酸如甲基丙烯酸与低级烷醇如甲醇酯化的方法，在固体阳离子催化剂上形成相应的酯，其中使用羧酸超过链烷醇 摩尔基，其改进包括：（A）使用水力流化固体催化剂反应器进行连续酯化反应，（B）在酯化反应中包括具有6至15个碳原子的烃，（C）通过 来自酯化反应器的流出物进入第一蒸馏塔，其中酯产物和水副产物在塔顶馏出，（D）从第一蒸馏塔的底部取出未酯化的羧酸，溶剂和重质物，（E） 在塔顶馏出物中从水中分离水（C）并回收酯产物，（F）在第二馏出物中将重质物与羧酸溶剂与（D）分离 描述了（G）从（F）将羧酸溶剂回收到酯化反应器（A），（H）从（F）处理重质物。