Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Process for treating catalyst of purifying automobile waste gas

A technology for automobile exhaust and treatment methods, applied in physical/chemical process catalysts, chemical instruments and methods, catalyst regeneration/reactivation, etc., can solve the problems of complex process flow, secondary pollution investment cost, low flue gas conversion rate, etc. , to achieve the effect of simple and feasible process, low investment in equipment and raw materials, and small consumption

Inactive Publication Date: 2006-03-29
SINO PLATINUM METALS CO LTD
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above methods are only aimed at the sulfur dioxide waste gas produced by the smelter. There is no chlorine in the pollutants, and there are problems such as complex process flow, low conversion rate of flue gas, secondary pollution and high investment costs.

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0021] Embodiment, the automobile tail gas purification spent catalyst material (abbreviation primary leaching slag) of table 1 through hydrochloric acid and sodium chlorate leaching treatment is placed in the roasting dish that is placed in the airtight collecting hood, adds and material weight ratio 1: 1 Concentrated sulfuric acid with a concentration of 36N is stirred evenly and then heated and roasted. The sulfur dioxide flue gas generated by the roasted material is sent into four absorption bottles with water or dilute sulfuric acid placed in sequence, and chlorine gas with a purity of 98% is passed into the four absorbers from the outside at the same time. In the absorption bottle, the remaining gas after absorption is sent to the fifth absorption bottle containing 20% ​​sodium hydroxide solution, and then discharged into the atmosphere. Table 1 shows the acidity and chloride ion concentration of the absorption liquid in the first 4 absorption bottles after the batch mate...

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 present invention provides a method capable of cleaning and treating chlorine gas and sulfur dioxide water gas produced at the time of sulfating calcination simultaneously. Said invention utilizes the excess chlorine gas produced by sulfating calcination to oxidize sulfur dioxide water gas, and utilizes absorption liquor to absorb and obtain sulfuric acid so as to implement the control of environmental pollution resulted from sulfur dioxide produced by removing noble metal when the waste catalyst for cleaning tail gas of automobile is treated. Said invention is simple, and easy to implement.

Description

technical field [0001] The invention relates to a method for purifying sulfur dioxide waste gas produced when recovering precious metals in waste automobile catalysts, in particular to the purification of sulfur dioxide waste gas and chlorine gas produced during sulfation and roasting of waste catalyst materials for automobile tail gas purification after primary leaching with hydrochloric acid and sodium chlorate Approach. Background technique [0002] Low-concentration sulfur dioxide discharged into the atmosphere not only loses and wastes sulfur resources, but also affects the health of residents and the growth of animals and plants, corrodes and destroys buildings, and causes environmental pollution. There are many methods for purifying, recovering and utilizing low-concentration sulfur dioxide in flue gas, such as ammonia absorption method, lye absorption method, lime plaster method, limestone washing method, zinc oxide absorption method, citrate method, etc. The recove...

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): B01D53/50B01J38/60B01D53/94B01D53/96
Inventor 余建明陈昌禄李奇伟
Owner SINO PLATINUM METALS CO LTD
Features
  • Generate Ideas
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

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

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com