Production of polymerization grade dicyclopentadiene
    6.
    发明授权
    Production of polymerization grade dicyclopentadiene 失效
    生产聚合级二环戊二烯

    公开(公告)号:US5401891A

    公开(公告)日:1995-03-28

    申请号:US169847

    申请日:1993-12-17

    摘要: A process for purifying crude dicyclopentadiene which comprises the steps of: cracking the crude dicyclopentadiene to form a monomeric-containing effluent which comprises at least one monomer selected from the group consisting of: C.sub.4 acyclic dienes, C.sub.5 acyclic dienes, cyclopentadiene and methylcyclopentadiene; separating the monomeric-containing effluent into a cyclopentadiene-enriched stream and a cyclopentadiene-poor stream; dimerizing the cyclopentadiene-enriched stream to form a dimerizer effluent; contacting a membrane separator under pervaporation conditions with the dimerizer effluent wherein the C.sub.4 acyclic dienes, C.sub.5 acyclic dienes and cyclopentadiene permeate through the membrane separator and wherein a dicyclopentadiene product having a purity of at least about 98% is retained as retentate.

    摘要翻译: 一种用于纯化粗二环戊二烯的方法,其包括以下步骤:裂解粗二环戊二烯以形成含单体的流出物,其包含至少一种选自以下的单体:C 4无环二烯,C5无环二烯,环戊二烯和甲基环戊二烯; 将含单体的流出物分离成富含环戊二烯的流和不饱和环戊二烯流; 使富含环戊二烯的流二聚化以形成二聚体流出物; 使膜分离器在渗透蒸发条件下与二聚化器流出物接触,其中C4无环二烯,C5无环二烯和环戊二烯渗透通过膜分离器,并且其中保留纯度至少为约98%的二环戊二烯产物作为保留物。

    Process for the vapor-phase thermal cracking of dicyclopentadiene and a
process for the manufacture of high purity dicyclopentadiene
    7.
    发明授权
    Process for the vapor-phase thermal cracking of dicyclopentadiene and a process for the manufacture of high purity dicyclopentadiene 失效
    二环戊二烯的气相热裂解方法和制备高纯度二环戊二烯的方法

    公开(公告)号:US5321177A

    公开(公告)日:1994-06-14

    申请号:US869612

    申请日:1992-04-16

    摘要: Recently, as a process for manufacturing cyclopentadiene resin-shaped articles, an attention has been given to reaction injection molding (RIM). To conduct RIM, it is necessary to use high purity dicyclopentadiene (DCPD) as the raw material. Vapor-phase thermal cracking of DCPD is usually used as a step of process for manufacturing high purity DCPD. Hithertofore, when conducting thermal cracking of DCPD, coke formation within cracking tubes is the most serious and troublesome problem. A vapor-phase thermal cracking process for resolving the problem by a very simple procedure is described herein. Further, a process for manufacturing high purity DCPD suitable as a raw material for use in RIM utilizing the vapor-phase thermal cracking process just mentioned above is also described.

    摘要翻译: 近来,作为制造环戊二烯树脂制品的方法,注意反应注射成型(RIM)。 为了进行RIM,需要使用高纯度二环戊二烯(DCPD)作为原料。 DCPD的气相热裂解通常用作制造高纯度DCPD的工艺步骤。 到目前为止,当进行DCPD的热裂解时,裂化管内的焦炭形成是最严重和最麻烦的问题。 本文描述了通过非常简单的过程解决问题的气相热裂解方法。 此外,还描述了一种适用于利用上述气相热裂解方法的RIM中使用的原料的高纯度DCPD的方法。