Method for recovering elemental sulfur through photoinduced catalytic disproportionation through sulfur dioxide absorption liquid

A technology of sulfur dioxide and absorption liquid, which is applied in the direction of sulfur preparation/purification, etc., can solve the problems of difficult separation of catalyst and sulfur colloid, secondary pollution, etc., and achieve the effect of being conducive to industrial application, short process, and solving environmental pollution problems

Active Publication Date: 2018-02-23
CENT SOUTH UNIV
View PDF4 Cites 21 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, Chinese patent (application number CN201610831968.8) introduces a method of reducing SO by reducing agent 2 The method for preparing sulfur, the reduction reaction of this method needs to be carried out in a high temperature environment of 600-1000 ° C, and the sulfide by-products generated during the reaction need to be further processed and converted, which

Method used

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
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for recovering elemental sulfur through photoinduced catalytic disproportionation through sulfur dioxide absorption liquid
  • Method for recovering elemental sulfur through photoinduced catalytic disproportionation through sulfur dioxide absorption liquid

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Analytical pure H 2 SO 3 , to analyze pure KI.

[0020] Add 50mLH to the photochemical reactor with cooling water jacket, inert gas protection and magnetic stirring 2 SO 3 and 9.96g KI, 0.2L / min N 2 Continue for 30 minutes to remove the air, place the fully wrapped and sealed reactor with tin foil under a xenon lamp light source for vertical irradiation, adjust the current to 20A, and circulate and cool with normal temperature water, stop the irradiation after 9 hours, and no elemental sulfur is formed.

Embodiment 2

[0022] Analytical pure H 2 SO 3 , to analyze pure KI.

[0023] Add 50mLH to a photochemical reactor with cooling water jacket, inert gas protection and magnetic stirring 2 SO 3 , 0.2L / minN 2 Continue for 30 minutes to remove the air. After sealing, place the reactor under a xenon lamp light source to irradiate vertically, adjust the current to 20A, and cool it with normal temperature water circulation. After 9 hours, stop the irradiation, and no elemental sulfur is formed.

Embodiment 3

[0025] Analytical pure NaOH, analytical pure KI.

[0026] Add 50mL of 1mol / L NaOH and 11.62g of KI in a photochemical reactor containing a cooling water jacket, inert gas protection and magnetic stirring, and continuously feed pure SO 2 Gas (0.2L / min) to pH<2, the solution is yellow at this time, after sealing, put the reactor under the xenon lamp light source to irradiate vertically, adjust the current to 20A, cool with normal temperature water circulation, stop the irradiation after 9h, there are more As a yellow solid substance, filter and dry the substance at 60°C to constant weight, and XRD detection proves that the solid product is elemental S.

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

PUM

No PUM Login to view more

Abstract

The invention discloses a method for recovering elemental sulfur through photoinduced catalytic disproportionation through sulfur dioxide absorption liquid. According to the method, the sulfur dioxideabsorption liquid performs disproportionation reaction under the light illumination and iodide ion catalysis conditions to generate elemental sulfur precipitates. The method can be performed under the normal temperature and normal pressure conditions. Compared with a conventional high-temperature method, the method has the advantages that the energy consumption is low; the sulfur hardening is prevented; by using the method, the recovery of the elemental sulfur is easy; the flow process is short; the operation is simple; no secondary pollution exists; the industrial application is facilitated.

Description

technical field [0001] The invention relates to a method for recovering and treating sulfur dioxide waste gas, in particular to a method for removing atmospheric pollutant SO 2 The method for absorbing and converting elemental sulfur with economic value belongs to the technical field of recovering useful resources from atmospheric pollutants. Background technique [0002] Based on the concept of environmental protection and resource recycling, the current research on the transformation of pollutants has gradually focused on converting pollutants into useful resources for the reproduction process, or into commodities to bring benefits to enterprises. For the resource transformation of sulfur dioxide polluted gas, it is mainly to prepare sulfuric acid by oxidation or sulfur by reduction. With the increasing demand for sulfur in my country, the technology of how to convert sulfur dioxide into elemental sulfur simply and effectively has received continuous attention and develop...

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

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): C01B17/05
CPCC01B17/05C01P2002/72C01P2004/03
Inventor 刘恢王笑阳向开松杨姝
Owner CENT SOUTH UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap