Catalyst used for synthesizing vinyl chloride through acetylene hydrochlorination

A technology for the synthesis of vinyl chloride and catalysts by hydrochlorination of acetylene, applied in the field of catalysis, can solve the problems of low selectivity, many side reactions, and low catalyst activity, and achieve the effects of high activity, high selectivity, and high degree of graphitization

Inactive Publication Date: 2017-04-26
XINJIANG CORPS MODERN GREEN CHLOR ALKALI CHEM ENG RES CENT LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The invention provides a catalyst with better stability, which solves the shortcomings of the prepared catalyst, such as low activity, many side reactions, and low selectivity, the catalyst has a simple production and preparation method, and the catalyst preparation cost is low

Method used

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  • Catalyst used for synthesizing vinyl chloride through acetylene hydrochlorination

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Weigh 5ml of citric acid, add 30ml of deionized water, stir to dissolve, and control the temperature of the dipping solution to 40°C by heating with an electric heating mantle. Add 15g of dry activated carbon, immerse and stir at 60°C for 12h, dry at 105°C for 8h, and carbonize at 450°C in a tube furnace for 2h at high temperature (modification) to obtain the treated carrier, and then load the active component of bismuth chloride. The initial conversion rate can reach 100%.

Embodiment 2

[0021] Connect the inert gas source nitrogen, control the gas flow rate to 20min / h, measure 20ml of lactic acid, and control the temperature of the impregnation solution to 40°C by heating with the electric heating mantle (to ensure that the liquid level can boil in a large area under the entrainment of the gas, and the steam is carried into the reactor) , Weigh 8g of activated carbon and add it to the reactor. The temperature of the reactor is controlled at 300°C (that is, modification), and the treatment time is maintained for 3 hours to obtain the treated carrier activated carbon, which is then loaded with the active component of copper chloride. The initial conversion rate can reach 100%.

Embodiment 3

[0023] Connect the inert gas source nitrogen, control the gas flow rate at 15ml / min, measure 15ml of tartaric acid, 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 15g of dry activated carbon, impregnate at room temperature for 7h, oven dry at 110°C for 6.5h, and roast in a nitrogen atmosphere in a tube furnace for 3h (modification) to obtain an acetylene hydrochlorination catalyst with an acetylene conversion rate of 67%.

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Abstract

The invention provides a catalyst used for synthesizing vinyl chloride through acetylene hydrochlorination. Alpha-hydroxy acid is adopted for modifying a carrier, and in combination with high-temperature roasting, the catalyst used for acetylene hydrochlorination is prepared after loading and steeping. The selected alpha-hydroxy acid has good water solubility, biocompatibility and degradability, can well modify the carrier at high temperature, and is high in graphitization degree. Hydroxy and carboxyl in a carrier modifying agent can be well bonded to an active carbon carrier at high temperature and anchor and strengthen active components, and prolongs the service life of the catalyst; the activity of the catalyst is improved.

Description

technical field [0001] The invention belongs to the field of catalysis, in particular to a catalyst for acetylene hydrochlorination to synthesize vinyl chloride. 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 mercury-free catalyst with the best application pro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/10B01J27/122B01J21/18B01J27/25B01J27/18C07C17/08C07C21/06
CPCB01J27/10B01J21/18B01J27/122B01J27/1817B01J27/25C07C17/08C07C21/06
Inventor 谢东阳王小昌王小艳轩卫华靳芳明李国栋李春华张学鲁
Owner XINJIANG CORPS MODERN GREEN CHLOR ALKALI CHEM ENG RES CENT LTD
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