Method for the synthesis of low cost initiators for telechelic polyisobutylenes
    9.
    发明授权
    Method for the synthesis of low cost initiators for telechelic polyisobutylenes 有权
    用于合成远程聚异丁烯的低成本引发剂的方法

    公开(公告)号:US08889926B2

    公开(公告)日:2014-11-18

    申请号:US14130079

    申请日:2012-07-02

    摘要: A method for the synthesis of 1,3-di(chloropropyl)-5-tert-butyl benzene includes the steps of conducting Friedl-Crafts alkylation of 1,3-diisopropyl benzene by tert-butyl chloride in the presence of an alkylation catalyst to obtain 1-tert-butyl-3,5-diisopropylbenzene; peroxidizing the 1-tert-butyl-3,5-diisopropyl benzene by gaseous oxygen in the presence of a peroxidation catalyst in a basic solution to obtain 1,3-di(peroxypropyl)-5-tert-butylbenzene; reducing the 1,3-di(peroxypropyl)-5-tert-butylbenzene with a reducing agent to 1,3-di(hydroxylpropyl)-5-tert-butylbenzene; and chlorinating the 1,3-di(hydroxypropyl)-5-tert-butylbenzene to obtain 1,3-di(chloropropyl)-5-tert-butyl benzene.

    摘要翻译: 合成1,3-二(氯丙基)-5-叔丁基苯的方法包括以下步骤:在烷基化催化剂存在下,用叔丁基氯进行1,3-二异丙基苯的Fried-Crafts烷基化, 得到1-叔丁基-3,5-二异丙基苯; 在碱性溶液中,在过氧化催化剂存在下,用气态氧过氧化1-叔丁基-3,5-二异丙基苯,得到1,3-二(过氧丙基)-5-叔丁基苯; 用还原剂将1,3-二(过氧丙基)-5-叔丁基苯还原成1,3-二(羟基丙基)-5-叔丁基苯; 并将1,3-二(羟丙基)-5-叔丁基苯氯化,得到1,3-二(氯丙基)-5-叔丁基苯。

    Process of isolating enantiomer components from enantiomer mixtures by particle-size-controlled crystallization
    10.
    发明授权
    Process of isolating enantiomer components from enantiomer mixtures by particle-size-controlled crystallization 有权
    通过粒度控制结晶从对映体混合物中分离对映体组分的方法

    公开(公告)号:US08846911B2

    公开(公告)日:2014-09-30

    申请号:US13975744

    申请日:2013-08-26

    摘要: The present invention discloses a process for isolating enantiomer components from a mixture of enantiomers through particle-size-controlled crystallization, comprising the steps of: (a) forming a solution of a mixture of enantiomers (R) and (S) in a solvent in the absence of any further additives or agents; (b) seeding the solution of step (a) simultaneously or consecutively with seed crystals of enantiomer (R) and with seed crystals of enantiomer (S), wherein the seed crystals of enantiomer (R) differ in size and/or in quantity from the seed crystals of enantiomer (S) to allow separation of the crystals composed of a mixture enriched with enantiomer (R) from the crystals composed of a mixture enriched with enantiomer (S); (c) inducing simultaneous crystallization of enantiomer (R) and enantiomer (S); and (d) isolating crystals composed of a mixture enriched with enantiomer (R) from crystals composed of a mixture enriched with enantiomer (S) through size separation of the crystals, preferably through sieving, melting or sedimentation, in particular through sieving.

    摘要翻译: 本发明公开了一种通过粒度控制结晶从对映体混合物中分离对映异构体成分的方法,包括以下步骤:(a)在溶剂中形成对映体(R)和(S)的混合物的溶液 没有任何其他添加剂或药剂; (b)同时或连续地与对映异构体(R)的晶种和对映异构体(S)的晶种接种步骤(a)的溶液,其中对映异构体(R)的晶种在大小和/或数量上不同 对映异构体(S)的晶种,以允许由富含对映异构体(S)的混合物组成的晶体分离富含对映异构体(R)的混合物的晶体; (c)诱导对映体(R)和对映体(S)的同时结晶; 特别是通过筛选,通过筛分,熔融或沉淀,通过大小分离晶体,分离由富含对映体(S)的混合物组成的晶体,由富含对映体(R)的混合物构成的晶体。