Title:
METHOD FOR RECYCLING INDUSTRIAL WASTE SALT AND WASTE DENITRATION CATALYST
Document Type and Number:
WIPO Patent Application WO/2023/246080
Kind Code:
A1
Abstract:
The present invention relates to the field of waste recycling. Disclosed is a method for recycling industrial waste salt and a waste denitration catalyst. The method comprises: (1) pretreating industrial waste salt and a waste denitration catalyst to obtain industrial waste salt powder and waste denitration catalyst powder; (2) mixing the industrial waste salt powder and the waste denitration catalyst powder, and calcining the mixture; (3) leaching a calcined product in water or an alkaline solution, and carrying out filtering to obtain a filter residue a and a filtrate a; (4) reacting the filter residue a with an acidic solution, and then carrying out filtering; (5) adjusting the pH value of the filtrate a to 8.5-10.5, adding a magnesium salt, and carrying out filtering to obtain a filtrate b; (6) adjusting the pH value of the filtrate b to 8.5-10.5, adding a calcium salt, and carrying out filtering to obtain a filtrate c and a filter residue; and (7) concentrating the filtrate c to obtain an inorganic salt. The method can synergistically treat the industrial waste salt and the waste denitration catalyst, has the advantages of high product recycling efficiency, energy saving and the like, and has a great industrial application prospect.
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Inventors:
LIU XIANGHUI (CN)
HE FAQUAN (CN)
CHEN OU (CN)
WANG YONGZHENG (CN)
WANG HONGLIANG (CN)
ZHENG PENG (CN)
HE FAQUAN (CN)
CHEN OU (CN)
WANG YONGZHENG (CN)
WANG HONGLIANG (CN)
ZHENG PENG (CN)
Application Number:
PCT/CN2023/070608
Publication Date:
December 28, 2023
Filing Date:
January 05, 2023
Export Citation:
Assignee:
CHINA ENERGY LONGYUAN ENVIRONMENTAL PROT CO LTD (CN)
International Classes:
C22B7/00; C01D3/04; C01D7/00; C01G23/08; C22B34/12; C22B34/22; C22B34/36
Foreign References:
| CN114774701A | 2022-07-22 | |||
| CN107512734A | 2017-12-26 | |||
| CN102936039A | 2013-02-20 | |||
| CN104071832A | 2014-10-01 | |||
| CN110846717A | 2020-02-28 | |||
| US20210347649A1 | 2021-11-11 |
Attorney, Agent or Firm:
RUNPING & PARTNERS (CN)
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