Zeolite production method

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United States of America Patent

PATENT NO 10308516
APP PUB NO 20160115039A1
SERIAL NO

14990431

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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Provided is a method for continuous production of zeolite in which a starting material is continuously supplied to a tubular reactor to produce an aluminophosphate zeolite that contains, in the framework structure, at least aluminum atoms and phosphorus atoms or an aluminosilicate zeolite having 5≤SiO2/Al2O3≤2000. The tubular reactor is heated using a heat medium; a ratio (volume)/(lateral surface area) of the volume (inner capacity) to the lateral surface area of the tubular reactor is 0.75 cm or smaller; and seed crystals are added to the starting material. Through using a small-diameter tubular reactor and heating with a heat medium, it becomes possible to heat sufficiently the entirety of a starting material (zeolite precursor gel) in a short time, and to allow reaction to proceed at a high rate. The occurrence of irregular pressure fluctuations during continuous production of the zeolite can be prevented by adding seed crystals.

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Patent Owner(s)

  • KIMMON MANUFACTURING CO. LTD. AND MITSUBISHI CHEMICAL CORPORATION; JAPAN AS REPRESENTED BY PRESIDENT OF THE UNIVERSITY OF TOKYO

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Liu, Zhendong Tokyo, JP 62 790
Nishioka, Daisuke Yokohama, JP 25 195
Okubo, Tatsuya Tokyo, JP 39 204
Oshima, Kazunori Yokohama, JP 44 343
Takewaki, Takahiko Yokohama, JP 48 389
Wakihara, Toru Tokyo, JP 11 101

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