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Acetylene hydrochloride high-dispersity nanometer mercury-free catalyst and preparation method thereof

A technology of acetylene hydrochlorination and mercury catalyst, applied in the direction of physical/chemical process catalysts, chemical instruments and methods, hydrogen halide addition preparation, etc., can solve the problem of active component reduction, poor anti-coking effect, and low catalytic conversion rate and other problems, to achieve the effect of small active sites, short induction period, and high catalytic conversion rate

Inactive Publication Date: 2017-12-12
贵州重力科技环保股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Therefore, the existing catalysts have the disadvantages of low dispersion, poor anti-coking effect, low catalytic conversion rate, long induction period and short service life.
The main reasons are: ① low dispersion, improper selection of preparation process, carrier, dispersant, and competitive adsorbent, resulting in the existence of active components in the form of clusters, some active components are not effectively combined with the carrier, and the catalytic conversion rate is low. ②Chemical deactivation, when the mixed gas of acetylene and hydrogen chloride is in contact with the catalytic active component, acetylene is easy to reduce the active component; ③Deactivation of carbon deposition, acetylene self-polymerization produces self-polymer, which blocks the catalytic active group Minute

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Example 1. A kind of highly dispersed nano mercury-free catalyst of acetylene hydrochlorination, calculated in parts by weight, adopts PtCl 2 0.1 part, KCl0.056 part, InCl 3 0.25 parts, nano-TiO with particle diameter less than 5nm 2 0.12 parts and 99.474 parts of nitrogen-doped activated carbon.

[0026] Nitrogen-doped activated carbon is prepared by stirring, granulating, carbonizing, activating, rinsing and drying coal powder, petroleum coke and melamine in a mass ratio of 10:1:0.5.

[0027] The preparation method of the highly dispersed nanometer mercury-free catalyst of acetylene hydrochlorination is prepared according to the following steps:

[0028] (a) the above weight parts of PtCl 2 , KCl, InCl 3 and Nano TiO 2 Add to the aqueous solution and mix evenly to obtain product A;

[0029] (b) Divide product A into 2 equal parts, and impregnate nitrogen-doped activated carbon in 2 steps under ultrasonic conditions at 80°C;

[0030] (c) Dry product B by microw...

Embodiment 2

[0032] Example 2. A kind of highly dispersed nano mercury-free catalyst of acetylene hydrochlorination, calculated in parts by weight, adopts PtCl 2 0.4 parts, KCl0.224 parts, InCl 3 1 part, nano-TiO with particle diameter less than 5nm 2 0.48 parts and 97.896 parts of nitrogen-doped activated carbon.

[0033] Nitrogen-doped activated carbon is prepared by stirring, granulating, carbonizing, activating, rinsing and drying from coal powder, petroleum coke and melamine in a mass ratio of 10:1:0.8.

[0034] The preparation method of the highly dispersed nanometer mercury-free catalyst of acetylene hydrochlorination is prepared according to the following steps:

[0035] (a) the above weight parts of PtCl 2 , KCl, InCl 3 and Nano TiO 2 Add to the aqueous solution and mix evenly to obtain product A;

[0036] (b) Divide product A into 3 equal parts, and impregnate nitrogen-doped activated carbon in 3 steps under ultrasonic conditions at 80°C;

[0037] (c) Dry product B by mic...

Embodiment 3

[0039] Example 3. A kind of highly dispersed nano mercury-free catalyst of acetylene hydrochlorination, calculated in parts by weight, adopts PtCl 2 0.8 parts, KCl0.448 parts, InCl 3 2 parts, nano-TiO with particle diameter less than 5nm 2 0.96 parts and 95.792 parts of nitrogen-doped activated carbon.

[0040]The nitrogen-doped activated carbon is prepared by stirring, granulating, carbonizing, activating, rinsing and drying from coal powder, petroleum coke and melamine in a mass ratio of 10:1:1.

[0041] The preparation method of the highly dispersed nanometer mercury-free catalyst of acetylene hydrochlorination is prepared according to the following steps:

[0042] (a) the above weight parts of PtCl 2 , KCl, InCl 3 and Nano TiO 2 Add to the aqueous solution and mix evenly to obtain product A;

[0043] (b) Divide product A into 4 equal parts, and impregnate nitrogen-doped activated carbon in 4 steps under ultrasonic conditions at 80°C;

[0044] (c) Dry product B by m...

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Abstract

The invention discloses an acetylene hydrochloride high-dispersity nanometer mercury-free catalyst and a preparation method thereof. The catalyst is prepared from PtCl2 serving as a main catalyzing component, KCl and InCl3 serving as catalyzing assistants, TiO2 which is less than 5nm in particle diameter serving as a dispersing agent and nitrogen-doped active carbon serving as a carrier by an ultrasonic stepwise impregnation-microwave drying method. The catalyst has the advantages of high dispersity, small active site, narrow particle size distribution, good carbon deposition resisting effect, high catalytic conversion rate, short induction period and long service life.

Description

technical field [0001] The invention relates to a chemical catalyst, in particular to a high-dispersion nanometer mercury-free catalyst for acetylene hydrochlorination and a preparation method thereof. Background technique [0002] Acetylene hydrochlorination and ethylene oxychlorination are the main synthetic methods used in the production of vinyl chloride (VCM). Due to the constraints of my country's "poor oil, rich coal, and little gas" resource structure, currently about 75% of the Vinyl chloride (VCM) is produced by acetylene hydrochlorination, but this route has been mainly using highly toxic mercuric chloride / activated carbon as a catalyst, which has serious environmental pollution problems. On October 10, 2013, at the diplomatic plenipotentiary meeting of the Minamata Convention hosted by the United Nations Environment Program held in Japan, representatives of 92 countries and regions, including China, signed the Minamata Convention to jointly control and reduce glob...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24C07C17/08C07C21/06
CPCC07C17/08B01J27/24B01J35/40C07C21/06
Inventor 李武斌张彬王良栋何家明梁丹全
Owner 贵州重力科技环保股份有限公司
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