Title:
PROCESS FOR PREPARING AROMATIC COMPOUND FROM NAPHTHA
Document Type and Number:
Japanese Patent JPS53116328
Kind Code:
A
Abstract:
This invention is directed to producing a high yield of aromatics from naphtha by integrating a catalytic reformer and a thermal hydrocracking unit followed by fractionating the product stream to obtain the desired aromatic. In this process, after sulfur is removed, the naphtha is catalytically reformed under conditions adapted to provide the maximum aromatic content. The reformed stream is then thermally hydrocracked, preferably in a system containing multiple reactors. The process does not require an external source of hydrogen since the reforming and hydrocracking units are operated to maintain a hydrogen balance. The hydrocracked stream is fractionated in a series of columns to produce the desired mix of aromatics. In one example, the fractionation separates out (1) benzene, which is further purified, if necessary (2) a toluene stream and a C9+ aromatic stream which are charged to a transalkylation reactor to produce a composition containing mixed xylenes sent to recycle and (3) a mixed xylene stream from which paraxylene is separated by a liquid-solid adsorption technique and from which the remaining xylenes are isomerized to produce further paraxylene. A by-product stream of light hydrocarbons is also produced. This procedure can be readily modified to produce greater amounts of benzene and/or toluene and less xylene.
Inventors:
ANGASU BII BEIRII
Application Number:
JP14652777A
Publication Date:
October 11, 1978
Filing Date:
December 06, 1977
Export Citation:
Assignee:
MOORE MCCORMACK ENERGY
International Classes:
C07C1/00; C07C5/373; C07C15/02; C07C15/08; C07C67/00; C10G50/00; C10G69/08; C10G59/02; (IPC1-7): C07C3/02; C07C3/62; C07C5/32; C07C15/02; C10G9/00; C10G35/00