Process for the manufacture of catalysts used for producing...

Details Process for the manufacture of catalysts used for producing... Process for the manufacture of catalysts used for producing...

2006-08-14

2009-02-24

Wood, Elizabeth D (Department: 1793)

Catalyst, solid sorbent, or support therefor: product or process

Zeolite or clay, including gallium analogs

C502S077000, C502S064000, C502S076000, C502S071000, C502S062000

Reexamination Certificate

active

07494951

ABSTRACT:
The present invention relates to a process for the manufacture of catalysts used for producing para-xylene by toluene shape selective alkylation. The invention is primarily used for solving the problems in the old technology, e.g., high requirements on the environment and great treatment of waste water containing organic amines when synthesizing ZSM-5 molecular sieves by using an organic amine as the template agent; small and non-homogeneous particles of the molecular sieves when synthesizing ZSM-5 molecular sieves by using an alcohol or ether as the template agent, such that the catalyst prepared thereby has low catalytic selectivity and low toluene conversion rate, etc. Said problems are better solved in the present invention by synthesizing ZSM-5 molecular sieves using the combination of organic amines and alcohols or ethers as the template agents (having a weight ratio of organic amines/alcohols=0.05-150, and organic amines/ethers=0.05-150), and modifying with organosilicon so as to obtain the catalysts. Said catalysts can be used in the industrial production of para-xylene manufactured by toluene shape selective alkylation.

REFERENCES:
patent: 4707345 (1987-11-01), Lok et al.
patent: 5250282 (1993-10-01), Kresge et al.
patent: 5367099 (1994-11-01), Beck et al.
patent: 5607888 (1997-03-01), Chang et al.
patent: 6486373 (2002-11-01), Abichandani et al.

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