Non-noble metal mercury-free catalyst for acetylene hydrochlorination reaction, preparation method and application thereof

A technology of acetylene hydrochlorination and non-precious metals, which is applied in the direction of metal/metal oxide/metal hydroxide catalyst, physical/chemical process catalyst, hydrogen halide addition preparation, etc., which can solve the problem of high cost and difficult large-scale industrial production, catalyst The loss of active components, intense reaction and other problems, to achieve good catalytic stability, single-pass conversion rate reduction, high and low temperature activity effect

Active Publication Date: 2017-03-15
ZHONGKE YIGONG XIAMEN CHEM TECH
View PDF12 Cites 32 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the mercury catalyst has the following disadvantages during use: 1) the reaction speed of mercury chloride to acetylene synthesis vinyl chloride is fast, the reaction is intense, and it is difficult to control; 2) under the reaction temperature condition, the sublimation of mercury chloride causes the catalyst active component 3) mercuric chloride is a highly toxic substance, which is harmful to human health due to sublimation in the production process, and has a large environmental pollution
The aforementioned researchers have done a lot of work in this area, and there are a lot of attempts on various metals and various ligands. However, due to the wide coverage and heavy workload, it is difficult to break through for a while, and the research results obtained before are not very effective. Satisfactory, the mercury-free catalyst prepared according to the current preparation technology cannot meet the requirements of industrialization for the time being
[0016] In summary, although noble metal catalysts have higher reactivity and vinyl chloride selectivity, the cost is very high and it is difficult to realize large-scale industrial production; although the cost of mercury-free non-precious metal catalysts is lower than that of noble metal catalysts, the preparation of the prior art Catalyst activity and stability still have a certain gap from industrialization

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
  • Non-noble metal mercury-free catalyst for acetylene hydrochlorination reaction, preparation method and application thereof
  • Non-noble metal mercury-free catalyst for acetylene hydrochlorination reaction, preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] (1) Weigh 17.05g CuCl 2 2H 2 O, 2.67 g NH 4 Cl and 5.76 g 85% H 3 PO 4 Dissolve in 43g of deionized water to prepare CuCl 2 , NH 4 Cl and H 3 PO 4 The solution;

[0052] (2) Set the specific surface area to 700-1300m 2 / g, the carbon tetrachloride adsorption value is 55-65%, and the ash value is less than 6%. The granular activated carbon after pickling is soaked in the above-mentioned prepared solution at room temperature, and the volume ratio of the control solution to the activated carbon is 0.5:1. , soak for 2 hours;

[0053] (3) Dry the soaked activated carbon and dry it with hydrogen chloride gas at 100°C to obtain the required catalyst A1.

[0054] (4) The above-mentioned catalyst is loaded into the tube reactor, and the C 2 h 2 Mixed gas with HCl (C 2 h 2 and HCl molar ratio of 1:1.05) for hydrochlorination reaction, control the reaction temperature at 80°C, and the acetylene space velocity at 20h -1 , the reaction gauge pressure is 0.1MPa, the in...

Embodiment 2

[0056] (1) Weigh 17.05g CuCl 2 2H 2 O, 1.07 g NH 4 Cl and 9.2 g 85% H 3 PO 4 Dissolve in 80g of deionized water to prepare CuCl 2 , NH 4 Cl and H 3 PO 4 The solution;

[0057] (2) Set the specific surface area to 700-1300m 2 / g, the carbon tetrachloride adsorption value is 55~65%, the granular activated carbon after pickling is less than 6% is soaked in the above-mentioned prepared solution, and the control soaking temperature is 40 ℃, the volume ratio of solution and activated carbon is less than 6%. 1:1, soak for 10 hours;

[0058] (3) Dry the soaked activated carbon and dry it with hydrogen chloride gas at 150° C. to obtain the required catalyst A2.

[0059] (4) The above-mentioned catalyst is loaded into the tube reactor, and the C 2 h 2 Mixed gas with HCl (C 2 h 2 The molar ratio of HCl and HCl is 1:1) for hydrochlorination reaction, the temperature of the reaction is controlled at 100°C, and the space velocity of acetylene is 50h -1 , the reaction gauge pr...

Embodiment 3

[0061] (1) Weigh 17.05g CuCl 2 2H 2 O, 6.42 g NH 4 Cl and 6.92 g 85% H 3 PO 4 Dissolve in 100g of deionized water to prepare CuCl 2 , NH 4 Cl and H 3 PO 4 The solution;

[0062] (2) Set the specific surface area to 700-1300m 2 / g, the carbon tetrachloride adsorption value is 55~65%, and the granular activated carbon after pickling is less than 6% is soaked in the above-mentioned prepared solution, and the control soaking temperature is 60 ℃, and the volume ratio of solution and activated carbon is: 1.5:1, soak for 5 hours;

[0063] (3) Dry the soaked activated carbon and dry it with hydrogen chloride gas at 200°C to obtain the desired catalyst A3.

[0064] (4) The above-mentioned catalyst is loaded into the tube reactor, and the C 2 h 2 Mixed gas with HCl (C 2 h 2 The molar ratio of HCl and HCl is 1:1.03) for hydrochlorination reaction, the temperature of the reaction is controlled at 120°C, and the space velocity of acetylene is 40h -1 , the reaction gauge pres...

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

PropertyMeasurementUnit
adsorption capacityaaaaaaaaaa
Ash contentaaaaaaaaaa
Login to view more

Abstract

The invention relates to a non-noble metal mercury-free catalyst for acetylene hydrochlorination reaction, a preparation method and application thereof. The preparation method comprises the steps of: 1) preparing a mixed solution of a copper salt, an ammonium salt and phosphoric acid, or a mixed solution of a copper salt, an ammonium salt and phosphate; 2) adding activated carbon into the mixed solution obtained in step 1 for soaking; 3) spin-drying the soaked activated carbon, and conducting heating and drying to obtain the catalyst. Through the synergistic effect of multiple components, the catalyst prepared by the method provided by the invention acquires good catalytic stability and high low-temperature activity, and under a reaction temperature of 130DEG C and the existing mercury catalyst running pressure condition and feeding intensity, more than 96% of conversion per pass and more than 99% of vinyl chloride selectivity can be obtained. As the technical conditions of the catalyst for acetylene hydrochlorination reaction are similar to those of the existing mercury catalyst, renovation of existing equipment is unnecessary, and the mercury catalyst can be replaced easily on the existing equipment.

Description

technical field [0001] The invention relates to the field of chemical production, in particular to a non-precious metal mercury-free catalyst for acetylene hydrochlorination, a preparation method and application thereof. Background technique [0002] Vinyl chloride (VCM) is a monomer for synthesizing polyvinyl chloride resin (PVC). PVC is one of the five general-purpose resins and occupies a very important position in the world. At present, VCM production routes are mainly divided into ethylene method and acetylene method according to different sources of raw materials. Foreign countries mainly adopt the ethylene method derived from the petrochemical route, while my country's unique resource and energy structure of "rich coal, poor oil, and little gas" determines that the production of vinyl chloride mainly adopts the acetylene method. That is, starting from coal, acetylene is obtained through calcium carbide, and then vinyl chloride is obtained through acetylene hydrochlor...

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): B01J27/24B01J23/72C07C17/08C07C21/06
CPCB01J23/72B01J27/24C07C17/08C07C21/06
Inventor 钟劲光刘瑞艳刘星
Owner ZHONGKE YIGONG XIAMEN CHEM 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