Chemistry of carbon compounds – Miscellaneous organic carbon compounds – C-metal
Patent
1981-10-19
1983-08-23
Sneed, Helen M. S.
Chemistry of carbon compounds
Miscellaneous organic carbon compounds
C-metal
252431N, 252455Z, C07F 506
Patent
active
044003285
ABSTRACT:
The present invention relates to provide new crystalline zeolite catalyst (ZKU-catalyst) having the superior catalytic activity and selectivity and the long period of the catalytic life.
One of the method of said catalyst (ZKU-2 catalyst) lies in crystallizing the starting zeolite preparation in the presence of the crystallization conditioning agent of crystallization of tetraalkyl (methyl or ethyl or combination thereof) ammonium cation.
Another method of said catalyst (ZKU-3, 4 catalysts) lies in crystallizing the starting zeolite preparation in the presence of both said conditioning agent of crystallization and the substance capable of forming the seed and/or the skelton of crystal. The ZKU-3 catalyst is manufactured using the seed of crystal, while the ZKU-4 catalyst is manufactured using the seed and the skelton of crystal.
The seed of crystal is useful for the promoter of the crystallization rate and the improvement of the catalytic activity, the skelton of crystal is useful for so-called "skelton" which is of use for the improvement of the mechanical strength, the dimentional stability and the conditioning of the pore structure of crystal in the molded catalyst and also for the improvement of uniformly dispersing the components of the catalytic composition.
The characteristic feature of the ZKU-2, 3 and 4 catalysts of the present invention has been compared with that of the ZSM-34 catalyst.
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patent: 4175114 (1979-11-01), Plank et al.
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Araki Eiichi
Inui Tomoyuki
Ishihara Takayuki
Kanie Toshihiro
Takegami Yoshinobu
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