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Title:
METHOD FOR SYNTHESIZING SSZ-13 MOLECULAR SIEVE UNDER ASSISTANCE OF HETEROGENEOUS SEED CRYSTAL
Document Type and Number:
WIPO Patent Application WO/2020/228369
Kind Code:
A1
Abstract:
Disclosed is a method for synthesizing an SSZ-13 molecular sieve under the assistance of a heterogeneous seed crystal. The method comprises the following steps: stirring and evenly mixing water, alkali, an organic template, a sodium silicate aqueous solution, and a heterogeneous seed crystal to obtain an initial gel; transferring the intial gel to a closed high-temperature reaction still, and heating to 140-180 °C in a homogeneous reactor for stirring and crystallization; after the crystallization is completed, separating, drying, and calcinating the products to obtain the SSZ-13 molecular sieve. The low-cost heterogeneous seed crystal is used to prepare a SSZ-13 molecular sieve and the homogeneous reactor having a rotation function is used for crystallization, therefore, not only high degree of crystallinity and purity is achieved, but also a size of the molecular sieve is ensured, which is only 300-500 nm, thereby making for rapid mass transfer, and improving the performance.

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Inventors:
ZHANG ZHAOLIANG (CN)
ZHANG NANA (CN)
XIN YING (CN)
SHAO MINGFEN (CN)
ZHANG YONGKAI (CN)
Application Number:
PCT/CN2020/071033
Publication Date:
November 19, 2020
Filing Date:
January 09, 2020
Export Citation:
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Assignee:
UNIV JINAN (CN)
International Classes:
C01B39/48; C01B39/04
Foreign References:
CN110127720A2019-08-16
CN107758691A2018-03-06
CN107010640A2017-08-04
CN106276953A2017-01-04
CN106629761A2017-05-10
Other References:
ZONES, S. I.: "Conversion of Faujasites to High-silica Chabazite SSZ-13 in the Presence of N, N, N-Trimethyl-l-adamantammonium Iodide", J. CHEM. SOC. FARADAY TRANS., vol. 87, no. 22, 31 December 1991 (1991-12-31), pages 3709 - 3710, XP008122222, ISSN: 0956-5000, DOI: 10.1039/FT9918703709
Attorney, Agent or Firm:
JINAN SPRINGS PATENT&TRADEMARK OFFICE (CN)
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