Tosoh Corporation

Seiji Maehama

Hidekazu Aoyama

Satoshi Nakamura

Akihiro Yano

Morihiko Sato

Yusuke Naraki

Tomoya Ishikawa

Yasuyuki Takamitsu

Mitsuaki Yoshimitsu

Takayoshi Mishima

A CHA-type zeolite has a molar ratio of silica to alumina of 10.0 or more and less than 20.0 and a molar ratio of silanol groups to silicon of 0.15&#xd7;10or more and 0.50&#xd7;10or less, a molar ratio of silica to alumina of 20.0 or more and 35.0 or less and a molar ratio of silanol groups to silicon of 0.15&#xd7;10or more and 1.10&#xd7;10or less, a molar ratio of silica to alumina of more than 35.0 and 45.0 or less and a molar ratio of silanol groups to silicon of 0.15&#xd7;10or more and 1.65&#xd7;10or less, or a molar ratio of silica to alumina of more than 45.0 and 55.0 or less and a molar ratio of silanol groups to silicon of 0.15&#xd7;10or more and 1.80&#xd7;10or less.

CHA-type zeolite and method for producing the same

Provided is a metal-containing CHA-type zeolite in which a ratio of a maximum intensity of an absorption peak in a range of 3685 cmor more and 3750 cmor less to a maximum intensity of an absorption peak in a range of 1800 cmor more and 1930 cmor less is less than 1.5 in an IR spectrum. A method for producing the metal-containing CHA-type zeolite includes a metal incorporation step of mixing a metal source and a CHA-type zeolite in which a ratio of a maximum intensity of an absorption peak in a range of 3665 cmor more and 3750 cmor less to a maximum intensity of an absorption peak in a range of 1800 cmor more and 1930 cmor less is less than 1.5 in an IR spectrum.

Metal-containing cha-type zeolite and method for producing the same

Provided is a production method by which an AEI zeolite is obtained without inducing a structural transformation in a crystalline aluminosilicate having a Y-structure and without using fluorine or phosphorus, the method including a crystallization step of crystallizing a composition containing an alumina source, a silica source, a structure directing agent, a sodium source, and water, a weight proportion of crystalline aluminosilicate relative to a total weight of the alumina source and the silica source being from 0 wt. % to 10 wt. %, and the crystallization step satisfying at least one of the following conditions: a molar ratio of hydroxide ion to silica in the composition is 0.45 or greater, the composition contains a cation represented by (CH)RN(R represents an alkyl group having from 1 to 4 carbons, and the alkyl group may contain at least one substituent), and the crystallization time is 80 hours or longer.

Method for producing AEI zeolite

A novel catalyst for polymerization of olefin is provided which comprises a modified clay compound (a) having an average particle diameter of less than 10 .mu.m, a transition metal compound (b), and an organoaluminum compound (c). This catalyst exhibits improved initial polymerization behavior, and produces an olefin polymer of less ash content at a high productivity.

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Yamaguchi, Japan

Seiji Maehama