Synthesis of zeolite ZSM-4

Details Synthesis of zeolite ZSM-4 Synthesis of zeolite ZSM-4

1975-04-30

1977-05-03

Meros, Edward J.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

260448C, 2605676M, 423328, 423329, 252455Z, C01B 3328, C07D29500

Patent

active

040214478

ABSTRACT:
As synthesized by previous methods, ZSM-4 zeolites are crystallized in the presence of substantial amounts of a tetramethylammonium hydroxide or halide. When synthesized in this way, they contain the tetramethylammonium cation as well as a metal cation such as sodium. To obtain a more catalytically active form, the sodium ion must be exchanged to very low levels. Catalysts prepared in this manner have been found to be quite low in stability. By synthesizing these zeolites in the presence of pyrrolidine or choline salts, ZSM-4 having a different organic nitrogen containing cation but the same crystal structure as previously prepared ZSM-4 is obtained. Catalysts made therefrom are, surprisingly, much more stable than those prepared from ZSM-4 made by previous methods.

REFERENCES:
patent: 2531427 (1950-11-01), Hauser
patent: 3306922 (1967-02-01), Barber et al.
patent: 3642434 (1972-02-01), Dwyer
patent: 3709979 (1973-01-01), Chu
patent: 3849463 (1974-11-01), Dwyer

Affiliated with

Also associated with

Rating

Synthesis of zeolite ZSM-4 does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Synthesis of zeolite ZSM-4, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Synthesis of zeolite ZSM-4 will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-345180