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1. 发明授权

US06359186B1 Process for co-production of metaxylene and paraxylene 有权
标题翻译：共生产间二甲苯和对二甲苯的方法
公开(公告)号：US06359186B1
公开(公告)日：2002-03-19
申请号：US09382577
申请日：1999-08-25
申请人： Gérard Hotier , Larry Mank , Françoise Montecot
发明人： Gérard Hotier , Larry Mank , Françoise Montecot
IPC分类号： C07C712
CPC分类号： C07C7/12 , C07C15/08
摘要： For co-production of metaxylene and paraxylene from a feedstock (line-4) of hydrocarbons, there is employed a simulated moving bed chromatographic column 5 having at least five zones and which delivers an extract, a raffinate and an intermediate raffinate. The feedstock has an ethylbenzene content of less than 5% by weight, and the chromatographic column comprises at least twenty-five beds, of which at least five beds are in zone 3B. The raffinate is distilled (31) to recover the metaxylene at a purity of at least 99% and orthoxylene. The extract is distilled (7, 10) to recover the paraxylene at a purity of at least 99.6%. The recovered isomers can be synthesized into isophthalic acid and terephthalic acid.
摘要翻译：为了从烃的原料（管线-4）共同生产间二甲苯和对二甲苯，使用具有至少五个区并且提供萃取物，萃余液和中间萃余液的模拟移动床色谱柱5。原料的乙苯含量小于5重量％，色谱柱包含至少二十五张床，其中至少五张床位于3B区。蒸馏塔（31）以回收至少99％纯度的邻二甲苯和邻二甲苯。将提取物蒸馏（7,10）以回收纯度至少为99.6％的对二甲苯。回收的异构体可以合成为间苯二甲酸和对苯二甲酸。

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