Pulp bed reaction technique for producing chlorine gas by chloride hydrogen catalytic oxidation

A technology of catalytic oxidation and hydrogen chloride, which is applied in the direction of chlorine/hydrogen chloride and chloride preparation, can solve the problems of high production cost, complicated preparation process of carbon nanotube materials, unsuitable for industrial application, etc., to eliminate the influence of internal diffusion, The effect of improving the utilization rate and reaction ability of the catalyst and avoiding the phenomenon of sintering deactivation

Active Publication Date: 2009-02-04
NANJING UNIV OF TECH
View PDF4 Cites 7 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to avoid the "hot spot" problem in the fixed bed reactor, the US patent (US2007274899) uses carbon nanotubes with high thermal conductivity as the carrier to prepare the catalyst to improve the thermal conductivity of the catalyst

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 1

[0017] In a 60mL three-phase slurry reactor, 50g of inert molten salt composed of zinc chloride, potassium chloride and sodium chloride is loaded, and a cerium-copper-potassium composite oxide catalyst is used, and the atomic ratio of cerium-copper-potassium in the composite oxide is It is 0.5:1:0.9. The particle size of the catalyst is 0.4 μm, the weight fraction of the catalyst in the molten salt is 20%, the reaction temperature is 350°C, the space velocity of hydrogen chloride in the raw material gas is 600L / kg·h, and the molar ratio of oxygen to hydrogen chloride is 1 / 1, The mixture of the two was passed into a three-phase slurry reactor, and the water vapor was separated by a condenser at the outlet of the reactor. After continuous and stable reaction for 4 hours, the conversion rate of hydrogen chloride was 85.2%.

Embodiment 2

[0019] In a 60mL three-phase slurry reactor, 50g of the inert molten salt composed of sodium bisulfate and potassium hydrogensulfate is charged, and the cerium-copper-potassium composite oxide catalyst in Example 1 is adopted, and the particle diameter of the catalyst is 0.4 μm. The weight fraction of the salt is 20%, the reaction temperature is 250°C, the space velocity of hydrogen chloride in the raw material gas is 600L / kg·h, the molar ratio of oxygen to hydrogen chloride is 1 / 1, and the mixture of the two is passed into a three-phase slurry reaction In the reactor, the water vapor was separated by a condenser at the outlet of the reactor. After continuous and stable reaction for 4 hours, the conversion rate of hydrogen chloride was 44.7%.

Embodiment 3

[0021] In a 60mL three-phase slurry reactor, 50g of inert molten salts composed of zinc chloride, potassium chloride and sodium chloride are charged, and the cerium-copper-chromium-potassium composite oxide catalyst in Example 1 is adopted, and the particle diameter of the catalyst is 0.4 μm, the weight fraction of the catalyst in the molten salt is 20%, the reaction temperature is 350°C, the space velocity of hydrogen chloride in the raw material gas is 600L / kg·h, and the molar ratio of oxygen to hydrogen chloride is 1 / 1, the mixture of the two is passed into In the three-phase slurry reactor, the water vapor was separated by a condenser at the outlet of the reactor, and after continuous and stable reaction for 4 hours, the conversion rate of hydrogen chloride was 84.5%.

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 slurry bed reaction process for producing chlorine by chlorine hydride catalytic oxidation. In a three-phrase slurry bed reactor, the catalyst powder is dispersed and suspended in an inert reaction medium; the mixed gas of chlorine hydride and oxygen is aerated; the chlorine is prepared by oxidation reaction at the temperature of 250-450 DEG C. The adoption of the three-phrase slurry bed reactor is provided with good heat transfer performance, facilitates the uniform temperature distribution in the reactor and controls to react in an isothermal state, thus avoiding the sintering deactivation phenomenon of the catalyst brought by high temperature; meanwhile, the adoption of powder catalyst can eliminate the influence of catalyst internal diffusion so as to improve the utilization rate and reaction capacity of the catalyst; the process has more than 85 percent of maximum yield, thus providing possibility for industrial production.

Description

technical field [0001] The invention belongs to the field of catalytic oxidation of hydrogen chloride, and in particular relates to a method for producing chlorine by catalytic oxidation of hydrogen chloride in a three-phase slurry bed reactor using inert molten salt as a reaction medium. Background technique [0002] Chlorine is an important chemical raw material, widely used in chemical, metallurgy, papermaking, textile, medicine, petrochemical, drinking water disinfection and environmental protection industries and other fields. Because a large amount of by-product hydrogen chloride will be produced in the production process of chlorine products, most enterprises adopt the water absorption method to make by-product hydrogen chloride into low-value-added hydrochloric acid for sale or discharge after neutralization, which not only causes waste of chlorine resources, but also brings Here comes the problem of environmental pollution. As the demand for chlorine continues to g...

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): C01B7/04
Inventor 乔旭陈献吕高明汤吉海崔咪芬
Owner NANJING UNIV OF TECH
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