发明名称 |
Process for the production of paraxylene that comprises an adsorption stage, a liquid phase isomerization stage and a gas phase isomerization stage with an euo-type zeolite |
摘要 |
A process for the production of paraxilene comprises an adsorption stage (18) using toluene as a desorbent in a simulated moving bed of a feedstock previously depleted in ethylbenzene by distillation (3) or by adsortion, an isomerization stage (26) without hydrogen in liquid phase diluted with toluene from the raffinate produced, a distillation stage (27) of the raffinate that is isomerized to recover the toluene (29) that is recycled. The separated isomerate is introduced into a xylene distillation column (9). The separated ethylbenzene is isomerized separately in gas phase with hydrogen at higher temperature and is distilled (5, 2, 9) in the presence of a catalyst that comprises an EUO-structural-type zeolite, then recycled to adsorption stage (18).
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申请公布号 |
US6448459(B1) |
申请公布日期 |
2002.09.10 |
申请号 |
US20000556298 |
申请日期 |
2000.04.24 |
申请人 |
INSTITUT FRANCAIS DU PETROLE |
发明人 |
MAGNE-DRISCH JULIA;ALARIO FABIO;JOLY JEAN-FRANCOIS;MINKKINEN ARI;MERLEN ELISABETH |
分类号 |
C07C5/27;C07C15/08;(IPC1-7):C07C5/22;C07C7/12 |
主分类号 |
C07C5/27 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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