Title:
気相アルキル化-液相アルキル交換方法
Document Type and Number:
Japanese Patent JP4235271
Kind Code:
B2
Abstract:
An alkylation/transalkylation process involving vapor phase alkylation of a benzene feedstock in a multi-stage alkylation zone having a plurality of series connected catalyst beds containing a pentasil aromatic alkylation catalyst, such as silicalite, coupled with intermediate separation and recirculation steps and liquid phase transalkylation over a transalkylation catalyst comprising a molecular sieve having a pore size greater than the pore size of the silicalite. The benzene containing feedstock is supplied to the multi-stage alkylation reaction zone along with a C2-C4 alkylating agent operated under temperature and pressure conditions to maintain the benzene in the gas phase. Alkylated product is recovered from the alkylation zone and supplied to a benzene recovery zone for the separation of the benzene from the alkylation product. Benzene from the benzene recovery zone is recycled to the reaction zone. A higher boiling bottom fraction containing a mixture of monoalkylated and polyalkylated aromatic components is supplied to a secondary separation zone from which a monoalkylated aromatic component, e.g. ethylbenzene, is recovered overhead with a heavier polyalkylated aromatic recovered as a bottom fraction. The bottom fraction may be applied to a tertiary separation zone.
Inventors:
The Ames Tay Merrill
The Aim's Earl Butler
The Aim's Earl Butler
Application Number:
JP31156597A
Publication Date:
March 11, 2009
Filing Date:
October 29, 1997
Export Citation:
Assignee:
FINA TECHNOLOGY, INCORPORATED
International Classes:
B01J29/06; C07C15/073; C07B61/00; C07C2/66; C07C5/13; C07C5/27; C07C6/12; C07C9/22; C07C15/02
Domestic Patent References:
| JP4187647A |
Attorney, Agent or Firm:
Patent business corporation Odashima patent office