Title:
METHOD FOR PURIFYING SODIUM BROMIDE USING COKE OBTAINED FROM PYROLYZED WASTE CIRCUIT BOARDS
Document Type and Number:
WIPO Patent Application WO/2021/129204
Kind Code:
A1
Abstract:
A method for purifying sodium bromide using coke obtained from pyrolyzed waste circuit boards. The present invention belongs to the field of purification and high-value utilization of sodium bromide and particularly relates to a method for using coke obtained from pyrolyzed waste circuit boards to reduce and purify a crude bromide salt obtained from waste circuit boards smelting soot. The method mainly comprises the following steps: carbonization conversion, purification filtration, and vacuum desolvation. The method for using coke obtained from pyrolyzed waste circuit boards to reduce a crude bromide salt enriched from waste circuit board smelting soot is used to obtain a purified sodium bromide crystal, thereby achieving the resource coupling and high-value utilization of two wastes and avoiding the secondary pollution in the process of recycling the waste circuit boards. The present invention is characterized by simple process, high resource utilization rate, no tail liquid discharge and the like.
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Inventors:
WU YUFENG (CN)
LIU GONGQI (CN)
PAN DEAN (CN)
LIU GONGQI (CN)
PAN DEAN (CN)
Application Number:
PCT/CN2020/127972
Publication Date:
July 01, 2021
Filing Date:
November 11, 2020
Export Citation:
Assignee:
UNIV BEIJING TECHNOLOGY (CN)
International Classes:
C01D3/10; C01D3/14
Foreign References:
| CN110980771A | 2020-04-10 | |||
| CN1354125A | 2002-06-19 | |||
| CN110592385A | 2019-12-20 | |||
| CN105858686A | 2016-08-17 | |||
| CN106166473A | 2016-11-30 | |||
| CN109112313A | 2019-01-01 | |||
| CN101659426A | 2010-03-03 | |||
| CN109095496A | 2018-12-28 | |||
| US3969491A | 1976-07-13 |
Attorney, Agent or Firm:
BEIJING SIHAI TIANDA INTELLECTUAL PROPERTY AGENCY LTD. (CN)
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