Mitsubishi Chemical Corporation

Japan Technological Research Association of Artificial Photosynthetic Chemical Process

Masahiro Hara

Takahiko Takewaki

Takeshi Matsuo

Manabu Tanaka

Toshiyuki Yokoi

Hiroaki Onozuka

Masato Yoshioka

Masashi Yamaguchi

Tohru Setoyama

Mikio Hayashi

Yumiko Yoshikawa

Naoyuki Sakamoto

A CON zeolite satisfying the following (1) to (2): (1) The framework is CON as per the code specified by the International Zeolite Association (IZA); and (2) It contains silicon and aluminum, and the molar ratio of aluminum to silicon is 0.04 or more.

Zeolite catalyst and method for producing lower olefin

Provided is a method for producing an inexpensive, high-performance AEI type zeolite and an AEI type zeolite having a Si/Al ratio of 6.5 or less and an acidity of 1.2 mmol/g or more and 3.0 mmol/g or less, by using neither an expensive Y type zeolite as a raw material nor dangerous hydrofluoric acid. The method for producing an AEI type zeolite having a Si/Al ratio of 50 or less includes: preparing a mixture including a silicon atom material, an aluminum atom material, an alkali metal atom material, an organic structure-directing agent, and water; and performing hydrothermal synthesis of the obtained mixture, in which a compound having a Si content of 20% by weight or less and containing aluminum is used as the aluminum atom material; and the mixture includes a zeolite having a framework density of 14 T/1000 &#x212b;or more in an amount of 0.1% by weight or more with respect to SiOassuming that all Si atoms in the mixture are formed in SiO.

AEI type zeolite, method for producing same, and uses thereof

A zeolite catalyst capable of maintaining a high conversion of raw materials over a long period of time, and a method of producing a lower olefin stably over a long period of time using the zeolite catalyst is to be provided. A CON zeolite catalyst containing aluminum (Al) as a constituent element, wherein the CON zeolite catalyst has a ratio ((A/A)&#xd7;100 (%)) of an integrated intensity area (A) of signal intensity in a range from 57.5 ppm to 70 ppm to an integrated intensity area (A) of signal intensity in a range from 45 ppm to 70 ppm is not less than 49.0% when analyzed byAl-MAS-NMR is prepared, and a lower olefin is produced by a MTO process using the zeolite catalyst.

Provided is a method for producing an inexpensive, high-performance AEI type zeolite and an AEI type zeolite having a Si/Al ratio of 6.5 or less by using neither an expensive Y type zeolite as a raw material nor dangerous hydrofluoric acid. The method for producing an AEI type zeolite having a Si/Al ratio of 50 or less includes: preparing a mixture including a silicon atom material, an aluminum atom material, an alkali metal atom material, an organic structure-directing agent, and water; and performing hydrothermal synthesis of the obtained mixture, in which a compound having a Si content of 20% by weight or less and containing aluminum is used as the aluminum atom material; and the mixture includes a zeolite having a framework density of 14 T/1000 &#x212b;or more in an amount of 0.1% by weight or more with respect to SiOassuming that all Si atoms in the mixture are formed in SiO.

A method for manufacturing a catalyst, which comprises regenerating a catalyst comprising a CHA zeolite as an active ingredient and having an ethylene conversion lowered through reaction of producing propylene by bringing into contact with ethylene in a vapor phase, by bringing the catalyst into contact with a gas which does not comprise oxygen and comprises hydrogen having a hydrogen partial pressure of 0.01 MPa or more as an absolute pressure thereof.

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Yokohama, Japan

Masahiro Hara