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

Catalyst for catalyzing incineration of vinyl chloride polymerization moisture-containing tail gas and preparation method thereof

A vinyl chloride polymerization and catalytic incineration technology, applied in the direction of catalyst activation/preparation, physical/chemical process catalysts, combustion methods, etc., to prevent loss, avoid catalyst deactivation by alkali poisoning, and improve anti-poisoning ability

Active Publication Date: 2021-03-02
WANHUA CHEM GRP CO LTD
View PDF11 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, it is difficult to make a dechlorination catalyst with high catalytic activity, strong anti-poisoning ability, good economical performance and excellent comprehensive performance

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
  • Catalyst for catalyzing incineration of vinyl chloride polymerization moisture-containing tail gas and preparation method thereof
  • Catalyst for catalyzing incineration of vinyl chloride polymerization moisture-containing tail gas and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] (1) Preparation of active component doping precursor: take 100g of niobium concentrate, add a concentration of 40wt% hydrofluoric acid solution to dissolve, add a concentration of 40wt% potassium fluoride solution to the reacted solution, and control the niobium concentrate: The mass ratio of hydrofluoric acid: potassium fluoride is 1:3:0.8, and the reaction is carried out at room temperature for 60 minutes to obtain the doping component precursor K 2 [NbOF 5 ] solution.

[0045] (2) Preparation of doping active components: Take 10g active component MnO and dissolve in 300g precursor solution, then add NH 4 OH to control pH = 8, fully stirred for 20 minutes and mixed to obtain the doping active component.

[0046] (3) Preparation and modified carrier: refer to the general method for preparing ATP powder in Example 1 (step 2-3) of patent CN 102794169 B, and sieve out 200-300 mesh ATP powder. Weigh 100g powder and put it into 1L modified solvent (the volume ratio of ea...

Embodiment 2

[0052] (1) Preparation of active component doping precursor: control the mass ratio of refined niobium ore: hydrofluoric acid: potassium fluoride to be 1:3:1, and other conditions are the same as in Example 1.

[0053] (2) Preparation of doping active components: Same as Example 1.

[0054] (3) Preparation and modified carrier: KH-550 was selected as the silane coupling agent, and other conditions were the same as in Example 1.

[0055] (4) load active component: with embodiment 1.

[0056] Catalytic incineration tail gas effect is shown in Table 5 below:

[0057] Table 5 Composition of chlorine-containing tail gas

[0058] Content / Ingredient vinyl chloride water carbon dioxide carbon monoxide Chloromethane Nitrogen Content before treatment (wt) 62％ 1.8％ 15％ 6％ 0.2％ 15％ Content after treatment (wt) 27ppm 2％ 83％ 0 8ppm 15％

Embodiment 3

[0060] (1) Preparation of active component doping precursor: take 100g of niobium concentrate, add a concentration of 40wt% hydrofluoric acid solution to dissolve, add a concentration of 40wt% potassium fluoride solution to the reacted solution, and control the niobium concentrate: The mass ratio of hydrofluoric acid: potassium fluoride is 1:4:1, and the reaction is carried out at room temperature for 60 minutes to obtain the doping component precursor K 2 [NbOF 5 ] solution.

[0061] (2) Preparation of doped active components: Dissolve 20g of active component MnO in 300g of precursor solution, and then add excess NH 4 OH to control pH = 9, fully stirred for 20 minutes and mixed to obtain the doping active component.

[0062] (3) Preparation and modified carrier: refer to the general method for preparing clavgrass powder in Example 1 (step 2-3) of patent CN 102794169B, and obtain the sieve component of ATP powder with 200 mesh to 300 mesh. Weigh 100g of powder and put it in...

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 provides a preparation method of a catalyst for catalyzing incineration of vinyl chloride polymerization moisture-containing tail gas. The method comprises the following steps of: (1) preparing an active component doped precursor: dissolving minerals containing transition metal niobium with acid, adding villiaumite, and carrying out fluorination complexation to generate a doped precursor K2[NbOF5]; (2) preparing a doped active component: mixing the active component MnO with the doped precursor K2[NbOF5], controlling the pH value, and adding alkali for coprecipitation to generatean active component emulsion; (3) preparing and modifying a carrier, namely modifying the carrier attapulgite by using a modifier solution containing a silane coupling agent; and (4) loading an activecomponent: carrying out vacuum impregnation on the active component emulsion, and carrying out roasting molding, wherein the roasting includes a steam passivation process. Through verification on anincineration platform, the catalyst prepared by the method has a good effect on catalytic incineration of the vinyl chloride moisture-containing tail gas.

Description

technical field [0001] The invention belongs to the field of chemical tail gas treatment, and in particular relates to a catalyst for catalyzing and burning vinyl chloride polymerization wet tail gas and a preparation method thereof. Background technique [0002] The reaction conversion rate of producing polyvinyl chloride by vinyl chloride polymerization is about 80%, and the remaining unreacted vinyl chloride is discharged from the polymerization kettle after the polymerization reaction is completed. For the treatment of this chlorine-containing tail gas (chlorine-containing volatile organic compounds, CVOCs, containing a certain amount of water), the common practice in industry is to condense and reuse it first, and then send the non-condensable gas to an incinerator for high-temperature incineration (above 1100°C) , high energy consumption, and will produce harmful substances such as CO, formaldehyde, formic acid, phosgene and other secondary pollution. [0003] Methods...

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
Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/34B01J37/02B01J37/03F23G7/07
CPCB01J37/03B01J37/0207B01J23/34F23G7/07Y02P20/584
Inventor 秦中宇徐彦龙梁高珲李允升朱文俊翟一鸣张宏科
Owner WANHUA CHEM GRP CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com