Login| Sign Up| Help| Contact|

Patent Searching and Data


Title:
METHOD FOR PROCESSING ZINC OXYCHLORIDE-CONTAINING SECONDARY MATERIAL
Document Type and Number:
WIPO Patent Application WO/2016/000231
Kind Code:
A1
Abstract:
A method for processing a zinc oxychloride-containing secondary material comprises the following steps: 1) leaching a zinc oxychloride-containing secondary material I by using an acid solution; 2) selectively extracting zinc by using a P204-kerosene solvent; 3) conducting reverse extraction-electrolysis to recycle zinc; 4) cyclically operating steps 1) to 4) to achieve enrichment of chlorine, potassium, sodium, magnesium and the like and form a chlorine salt-sulfate mixed system; 5) opening the raffinate obtained in step 4), mixing the opened raffinate with a zinc oxychloride-containing secondary material II when the input and opening balance of chloride ions is achieved, conducting liquid-solid separation, and performing step 1) on the separated deposits for leaching with the acidic raffinate; 6) when the separated solution satisfies a preset condition, purifying the chlorine-containing water phase; and 7) conducting evaporation and concentration to obtain KCl and NaCl products by means of crystallization. This processing method is environment-friendly and energy-saving, requires no discharge of process wastewater, significantly reduces the production cost, and completely eliminates secondary pollution caused by the current dechlorination process.

Inventors:
SHU YUZHANG (CN)
ZHANG QI (CN)
YANG GUIFEN (CN)
SUN BAOHUA (CN)
WEI LINKUI (CN)
Application Number:
CN2014/081557
Publication Date:
January 07, 2016
Filing Date:
July 03, 2014
Export Citation:
Click for automatic bibliography generation   Help
Assignee:
YUNNAN XIANGYUNFEILONG RESOURCES RECYCLING TECHNOLOGY CO LTD (672100, CN)
International Classes:
C22B3/26; C22B7/02; C22B19/30
Foreign References:
CN102808087A2012-12-05
CN103060561A2013-04-24
CN1858272A2006-11-08
JP2008266774A2008-11-06
Other References:
See also references of EP 3165616A4
Attorney, Agent or Firm:
BEIJING UTC LIANFENG INTELLECTUAL PROPERTY LAW OFFICE (GENERAL PARTNERSHIP) (Room 408, Asia-pacific Enterprise BuildingNo.333, Zhaojiabang Road, Xuhui District, Shanghai 0, 200030, CN)
Download PDF: