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1. 发明公开

KR1020040025871A 파라크실렌 및 스티렌의 동시 제조 방법 有权
标题翻译：由二甲苯和乙苯混合生产聚苯乙烯和苯乙烯，作为合成聚合物如聚氨酯和聚苯乙烯的原料有用
公开(公告)号：KR1020040025871A
公开(公告)日：2004-03-26
申请号：KR1020030065357
申请日：2003-09-20
申请人： 아이에프피 에너지스 누벨
发明人： 울프뤼끄 , 르플라이브필리베르 , 메띠비예알렝
IPC分类号： C10G65/12
CPC分类号： C07C7/12 , C07C5/3332 , C07C7/13 , C07C2523/14 , C07C2523/86 , C07C15/46 , C07C15/08 , C07C15/073
摘要： PURPOSE: A process for the co-production of paraxylene and styrene of high purity by stages of separation, dehydrogenation and isomerization is provided. CONSTITUTION: The process for co-production of high purity paraxylene and styrene from a charge containing xylenes, ethylbenzene and 9 - 10C hydrocarbons comprises the following stages: (1) distillation of the charge to separate xylenes, from which a head flux comprising mainly metaxylene, paraxylene, ethylbenzene and part of the orthoxylene, and at the base 9 - 10C hydrocarbons and remaining orthoxylene; (2) an adsorption stage of the head flux in a primary adsorption column containing numerous adsorbent beds, interconnected in a closed loop, with varying selectivity for paraxylene, ethylbenzene, metaxylene and orthoxylene and comprising 4 zones of a desorption zone for paraxylene, a desorption zone for ethylbenzene, an adsorption zone for paraxylene and a zone between extraction of raffinate and injection of desorbent; (3) distillation of the extract to obtain pure(99.7%) paraxylene and desorbent which is recycled to the adsorption column; (4) distillation of the raffinate, containing metaxylene, orthoxylene and ethylbenzene; (5) dehydrogenation of the distilled raffinate, the effluent containing styrene, metaxylene, orthoxylene, unconverted ethylbenzene and by-products, at least 50% of the ethylbenzene being converted to styrene; (6) elimination of by-products to produce a mixture containing mainly styrene, ethylbenzene, metaxylene and orthoxylene; (7) separation of the mixture to produce a primary flux containing styrene (99.8%) and a secondary flux containing metaxylene and orthoxylene; and (8) isomerization of the second flux and recovery of paraxylene, orthoxylene and metaxylene which are recycled to the distillation column for the charge.
摘要翻译：目的：提供通过分离，脱氢和异构化分阶段共同生产高纯度的对二甲苯和苯乙烯的方法。构成：从含有二甲苯，乙苯和9-10C烃的电荷中共同生产高纯度对二甲苯和苯乙烯的方法包括以下阶段：（1）将电荷蒸馏以分离二甲苯，其中主要包含二甲苯，对二甲苯，乙苯和部分邻二甲苯，碱在9-10℃的烃和剩余的邻二甲苯; （2）在含有多个吸附床的主吸附塔中的头部助熔剂的吸附阶段，其在闭环中相互连接，对对二甲苯，乙苯，间二甲苯和邻二甲苯具有不同的选择性，并且包含4个对二甲苯解吸区的区域，解吸乙苯区，对二甲苯吸附区和提取残液和注入脱附剂之间的区域; （3）蒸馏提取物，得到纯（99.7％）对二甲苯和脱附剂，再循环至吸附塔; （4）萃余液的蒸馏，含有间二甲苯，邻二甲苯和乙苯; （5）蒸馏提余液的脱氢，含苯乙烯，间二甲苯，邻二甲苯，未转化的乙苯和副产物的流出物，至少50％的乙苯转化为苯乙烯; （6）消除副产物以产生主要含有苯乙烯，乙苯，间二甲苯和邻二甲苯的混合物; （7）分离混合物以产生含有苯乙烯（99.8％）的主要助熔剂和含有中间二甲苯和邻二甲苯的次级助熔剂; 和（8）第二通量的异构化并回收对二甲苯，邻二甲苯和间二甲苯，将其循环到蒸馏塔进行充电。

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