发明授权
US6063978A Process for separating paraxylene comprising at least one
crystallization stage at high temperature and at least one clay
treatment upstream from the adsorption zone
失效
用于在高温下分离包含至少一个结晶阶段的对二甲苯和在吸附区上游的至少一种粘土处理的方法
- 专利标题： Process for separating paraxylene comprising at least one crystallization stage at high temperature and at least one clay treatment upstream from the adsorption zone
- 专利标题（中）： 用于在高温下分离包含至少一个结晶阶段的对二甲苯和在吸附区上游的至少一种粘土处理的方法
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申请号： US860559申请日： 1997-06-30
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公开(公告)号： US6063978A公开(公告)日： 2000-05-16
- 发明人: Gerard Hotier , Paul Mikitenko , Stuart R MacPherson
- 申请人： Gerard Hotier , Paul Mikitenko , Stuart R MacPherson
- 申请人地址： FRX
- 专利权人： Institut Francais du Petrole
- 当前专利权人： Institut Francais du Petrole
- 当前专利权人地址： FRX
- 优先权： FRX9415896 19941229
- 主分类号： B01D15/00
- IPC分类号： B01D15/00 ; B01D9/02 ; C07C7/00 ; C07C7/04 ; C07C7/12 ; C07C7/14 ; C07C15/08 ; C07C5/22
摘要：
A process for separating paraxylene at very high purity from a charge of xylene isomers, comprising a selective adsorption of a fraction that is rich in paraxylene, at least one high-temperature crystallization of this fraction, and an isomerization of the fraction depleted of paraxylene, recycling the mother liquor to the selective adsorption optionally via a clay treatment followed optionally by a distillation of the treatment effluent, and optionally introducing the mother liquor into a distillation unit, wherein the crystallization can comprise several high-temperature stages.
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