Title:
PREPARATION METHOD FOR SILICON NITRIDE-BASED CERAMIC SEPARATION MEMBRANE OF MICRO-NANO COMPOSITE FIBER STRUCTURE, AND APPLICATION THEREOF
Document Type and Number:
WIPO Patent Application WO/2024/036757
Kind Code:
A1
Abstract:
A preparation method for a silicon nitride-based ceramic separation membrane of a micro-nano composite fiber structure, comprising the following steps: first, carrying out ultrasonic cleaning and drying on a porous β-phase silicon nitride-based ceramic membrane; second, impregnating the β-phase silicon nitride-based ceramic membrane with a catalyst solution, and calcining at a low temperature to form a metal oxide catalyst on the surfaces of ceramic grains; third, placing the β-phase silicon nitride-based ceramic membrane attached with the catalyst and a silicon powder in a high-temperature furnace, the ceramic membrane being suspended above the silicon powder; and fourth, introducing a nitrogen-containing gas into the high-temperature furnace, wherein the flux of the nitrogen-containing gas is 0.01 to 3 m3/h, heating at a rate of 0.5 to 5°C/min, heating the furnace temperature to 1000 to 1500°C, volatilizing the silicon powder, and transmitting the silicon powder in a gas phase to the surfaces of the β-phase silicon nitride-based grains, reacting the silicon powder with the nitrogen-containing gas under the catalysis of the metal oxide, growing nanoscale silicon nitride fibers on the surfaces of the grains, preserving heat for 0.1 to 4h, and cooling under natural conditions to obtain the silicon nitride-based ceramic separation membrane of the micro-nano composite fiber structure. Further disclosed are applications of the silicon nitride-based ceramic separation membrane of the micro-nano composite fiber structure in waste water treatment and oil-water separation treatment as a membrane separation assembly, and applications thereof in the field of catalysis as a catalyst carrier.
Inventors:
WANG JUNWEI (CN)
YANG XIONG (CN)
YIN LIANGJUN (CN)
MU CHUNHONG (CN)
YANG CHENGTAO (CN)
JIAN XIAN (CN)
YANG XIONG (CN)
YIN LIANGJUN (CN)
MU CHUNHONG (CN)
YANG CHENGTAO (CN)
JIAN XIAN (CN)
Application Number:
PCT/CN2022/128948
Publication Date:
February 22, 2024
Filing Date:
November 01, 2022
Export Citation:
Assignee:
YANGTZE DELTA REGION INSTITUTE OF UNIV OF ELECTRONIC SCIENCE AND TECHNOLOGY OF CHINA HUZHOU (CN)
International Classes:
B01D71/02; B01D65/02; B01D67/00; C02F1/44; C04B35/584
Foreign References:
| CN114028948A | 2022-02-11 | |||
| CN108176249A | 2018-06-19 | |||
| CN106669440A | 2017-05-17 | |||
| CN110357051A | 2019-10-22 | |||
| CN105801122A | 2016-07-27 | |||
| US4885199A | 1989-12-05 | |||
| JP2010248065A | 2010-11-04 |
Attorney, Agent or Firm:
SCIHEAD IP LAW FIRM (CN)
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