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Catalyst for ethyne hydrochlorination for synthesis of chloroethylene and preparation method thereof

A technology for synthesizing vinyl chloride and a catalyst by hydrochlorination of acetylene, which is applied in the field of catalysis, can solve the problems such as the use of catalysts for the hydrochlorination of acetylene, which has not yet been used, and achieve the effects of simple production and preparation method, slowing down poisoning, and few side reactions.

Active Publication Date: 2016-04-27
XINJIANG CORPS MODERN GREEN CHLOR ALKALI CHEM ENG RES CENT LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Many catalysts in other industries use competitive adsorption methods in the preparation process, but there is no report on the use of competitive adsorbents for acetylene hydrochlorination catalysts

Method used

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  • Catalyst for ethyne hydrochlorination for synthesis of chloroethylene and preparation method thereof
  • Catalyst for ethyne hydrochlorination for synthesis of chloroethylene and preparation method thereof
  • Catalyst for ethyne hydrochlorination for synthesis of chloroethylene and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Weigh 2.65g of copper chloride dihydrate, weigh 2g of tartaric acid, add 30ml of deionized water, stir to dissolve, adjust the pH value to 2 with hydrochloric acid, and control the temperature of the impregnation solution to 40°C by heating with an electric heating mantle. Add 15g of dry activated carbon, impregnate at room temperature for 8h, dry at 105°C for 8h, and roast in a nitrogen atmosphere in a tube furnace for 2h to obtain the acetylene hydrochlorination catalyst, and the conversion rate of acetylene is 100%. Table 1 and figure 1 , figure 2 comparison.

Embodiment 2

[0022] Weigh 1.58g of bismuth chloride and 2g of oxalic acid, add 30ml of deionized water, stir to dissolve, adjust the pH value to 1.5 with hydrochloric acid, and control the temperature of the impregnation solution to 35°C by heating with an electric heating mantle. Add 15g of dry activated carbon, impregnate at room temperature for 6h, oven dry at 110°C for 9h, and roast in a tube furnace for 1.5h in a nitrogen atmosphere to obtain an acetylene hydrochlorination catalyst with an acetylene conversion rate of 90%. The content of bismuth element in the catalyst was characterized and analyzed by microwave digestion and atomic absorption of the catalyst prepared in this case and the catalyst without the addition of competitive adsorbent oxalic acid, as shown in Table 2.

Embodiment 3

[0024] Weigh 2g of barium nitrate and 2g of citric acid, add 30ml of deionized water, stir to dissolve, adjust the pH value to 1.5 with hydrochloric acid, and control the temperature of the impregnating solution to 50°C by heating with an electric heating mantle. Add 15 g of dry activated carbon, soak at room temperature for 7 hours, oven dry at 110°C for 6.5 hours, and roast in a tube furnace for 3 hours in a nitrogen atmosphere to obtain an acetylene hydrochlorination catalyst with an acetylene conversion rate of 67%.

[0025] Table 1 BET comparison table before and after adding tartaric acid to samples

[0026]

[0027] Table 2 The difference of catalyst active component content before and after adding competitive adsorbent

[0028]

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Abstract

The invention discloses a catalyst for ethyne hydrochlorination for synthesis of chloroethylene and a preparation method thereof. The catalyst of the invention is prepared by impregnation of an active carbon carrier, metallic compound active components and a hydroxyl-containing water-soluble carboxylic acid competitive adsorbent. The active components contain at least one component selected from chloride, nitrate, sulfate or phosphate of cobalt, copper, manganese, zinc, bismuth, barium and potassium. The competitive adsorbent contains citric acid, malic acid, salicylic acid, oxalic acid, tartaric acid and lactic acid. The prepared catalyst has characteristics of high activity, good selectivity, simple production method and low cost. By adding the hydroxyl-containing water-soluble carboxylic acid competitive adsorbent, the active components are greatly fixed to the carrier, and high temperature transfer of the active components is reduced; by roasting decomposition of the competitive adsorbent, rich pore structures are generated, and gas dispersion in the reaction process is improved; and dispersity of the active components is improved, catalyst poisoning is alleviated, and life of the catalyst is prolonged.

Description

technical field [0001] The invention belongs to the field of catalysis, and in particular relates to a catalyst for acetylene hydrochlorination to synthesize vinyl chloride and a preparation method thereof. Background technique [0002] With the sustained and rapid development of the national economy, the production capacity of polyvinyl chloride is increasing. The production of polyvinyl chloride in my country is mainly the calcium carbide acetylene method, and mercury catalyst mercury is mainly used in the synthesis process of vinyl chloride. On the one hand, the loss of mercury has caused serious environmental pollution. On the other hand, the lack of mercury resources also limits the use of mercury catalysts in my country. [0003] The development of mercury-free catalysts is the fundamental way to solve the above problems, but mercury-free catalysts are in the research and development stage, and there has been no industrialization report so far. At present, the mercur...

Claims

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Application Information

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IPC IPC(8): B01J27/122B01J27/10B01J23/02C07C17/08C07C21/06
CPCB01J23/02B01J27/10B01J27/122C07C17/08C07C21/06
Inventor 谢东阳王小艳万振国李静李国栋
Owner XINJIANG CORPS MODERN GREEN CHLOR ALKALI CHEM ENG RES CENT LTD
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