申请人:Murray Dermot Brendan
公开号:US20050020840A1
公开(公告)日:2005-01-27
A process for preparing an alkylene oxide, which process comprises: (i) oxidizing an alkylbenzene to obtain a stream comprising alkylbenzene hydroperoxide, (ii) contacting at least part of the alkylbenzene hydroperoxide obtained in step (i) with an olefin to obtain a product stream comprising an alkylene oxide (iii) separating alkylene oxide compound from the product stream of step (ii) to obtain (a) a residual product stream comprising alkylphenyl alcohol, and (b) alkylene oxide, (iv) feeding at least a part of the residual product stream comprising alkylphenyl alcohol to a reactor having a catalytic distillation zone, and concurrently in the reactor, (a) contacting the residual product stream comprising alkylphenyl alcohol with hydrogen in the catalytic distillation zone to convert the alkylphenyl alcohol in the residual product stream to alkylbenzene and form a reaction mixture, and (b) separating alkylbenzene from the reaction mixture by fractional distillation, (v) withdrawing a stream comprising alkylbenzene and having a reduced concentration of alkylphenyl alcohol than the feed stream from the reactor at a position upper from the catalytic reaction zone; (vi) withdrawing from the reactor at a position lower than the catalytic distillation zone a bottom stream comprising dimer(s) of alkylbenzene; (vii) converting the dimer(s) of alkylbenzene in the bottom stream from (vi) to alkylbenzene; and (viii) recycle at least a part of the alkylbenzene produced from (iv)(b) and/or (vi) to step (i).
制备烷基氧化物的过程,包括以下步骤:(i)将烷基苯氧化以获得含有烷基苯羟基过氧化物的流,(ii)将步骤(i)获得的至少部分烷基苯羟基与烯烃接触,以获得含有烷基氧化物的产物流,(iii)从步骤(ii)的产物流中分离烷基氧化物化合物,以获得(a)含有烷基苯酚的残余产物流,和(b)烷基氧化物,(iv)将至少部分含有烷基苯酚的残余产物流馈送到具有催化精馏区的反应器中,并在反应器中同时进行以下操作:(a)在催化精馏区中将含有烷基苯酚的残余产物流与氢气接触,将残余产物流中的烷基苯酚转化为烷基苯并形成反应混合物,(b)通过分馏将烷基苯从反应混合物中分离出来,(v)从反应器中在催化反应区域上方的位置提取含有降低烷基苯酚浓度的烷基苯流,(vi)从反应器中在催化精馏区域下方的位置提取含有烷基苯二聚体的底流,(vii)将步骤(vi)中底流中的烷基苯二聚体转化为烷基苯,(viii)回收至少部分从步骤(iv)(b)和/或步骤(vi)生产的烷基苯,回收至步骤(i)。