Method for extraction of vanadium from waste SCR catalyst and preparation of activated titanium silicon tungsten powder

An SCR catalyst, titanium silicon tungsten technology, applied in the field of waste catalyst recycling, can solve problems such as low cost, achieve the effects of low price, reduce consumption, and overcome sodium ion pollution
CN106521160AActive Publication Date: 2017-03-22安徽思凯瑞环保科技有限公司
6 Cites 13 Cited by

Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
安徽思凯瑞环保科技有限公司
Publication Date
2017-03-22

Smart Images

  • Figure 1
    Figure 1
Patent Text Reader

Abstract

The invention discloses a method for extraction of failure vanadium from a waste SCR catalyst and preparation of activated titanium silicon tungsten powder for making a new denitration catalyst. The method includes: conducting pretreatment on a waste SCR catalyst, performing wet grinding to obtain a slurry, and adding an oxalic acid solution to carry out leaching reaction; carrying out filter-press separation to obtain tungsten silicon-containing titanium slag powder and press filtrate, then performing cleaning, activation, and fine grinding to obtain nanoscale titanium silicon tungsten powder; separating the press filtrate, recovering oxalic acid and returning the recovered oxalic acid to leaching reaction, adding an oxidizing agent into the separated liquid to carry out precipitation reaction so as to obtain ammonium metavanadate precipitate, and conducting filtering and separation to obtain ammonium metavanadate solid. The method provided by the invention uses oxalic acid for reaction under a normal temperature condition, can separate failure vanadium salt from the SCR catalyst, utilizes acid to activate other components and then performs fine grinding and other treatments so as to obtain the raw material for preparation of a new denitration catalyst. The process provided by the invention has the characteristics of low technological investment requirement and low energy consumption, effectively solves the harmless treatment problem of the SCR catalyst, and realizes recycling of resources.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention relates to the technical field of recycling waste catalysts, in particular to a method for extracting vanadium from waste SCR catalysts and preparing activated titanium silicon tungsten powder. Background technique

[0002] In August 2014, the Ministry of Environmental Protection officially issued the "Notice on Strengthening the Supervision of Waste Flue Gas Denitrification Catalysts" and "Guidelines for Examination of Hazardous Waste Operation Permits for Waste Flue Gas Denitrification Catalysts", which included waste flue gas denitrification catalysts (vanadium-titanium series) Hazardous wastes are managed and classified as "HW49 other wastes" in the "National Hazardous Waste List" (the new regulations promulgated in 2016 were changed to HW50).

[0003] SCR denitrification catalysts are usually installed in a "2+1" installation mode. The normal SCR denitrification catalyst has a service life of about 2 years, and deactivated waste SCR ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More