Reaction system and method for preparing ethylene through acetylene hydrogenation

A reaction system, a technology for acetylene hydrogenation, applied in the fields of hydrogenation to hydrocarbons, bulk chemical production, organic chemistry, etc., can solve the problems of declining ethylene yield and catalyst deactivation, and achieve the effect of improving selectivity and increasing yield

Active Publication Date: 2015-12-16
北京锦泰诚瑞科技发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Furthermore, in the slurry bed process for preparing ethylene by hydrogenation of acetylene disclosed in the prior art, although the solvent used can fully dissolve acetylene, when the reaction temp

Method used

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  • Reaction system and method for preparing ethylene through acetylene hydrogenation

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Comparison scheme
Effect test

Embodiment 1

[0022] Provide a "gas-liquid phase" two-phase contact reaction system; the two-phase contact reaction system is composed of a liquid phase and a gas phase;

[0023] Hydrogen and acetylene are contained in the gas phase;

[0024] The liquid phase is composed of the following raw materials: 98 g of N-methyl-2-pyrrolidone, a non-polar solvent, and 2 g of complexed palladium prepared with nitrilotriacetic acid as a complexing agent.

Embodiment 2

[0026] Provide a "gas-liquid phase" two-phase contact reaction system; the two-phase contact reaction system is composed of a liquid phase and a gas phase;

[0027] Hydrogen and acetylene are contained in the gas phase;

[0028] The liquid phase is composed of the following raw materials: 95 g of non-polar solvent N-methyl-2-pyrrolidone, 3 g of palladium complexed with ethylenediaminetetraacetic acid as a complexing agent, and ethylenediaminetetraacetic acid as a complexing agent 1g of complexed manganese and 1g of complexed iron configured with ethylenediaminetetraacetic acid as complexing agent.

Embodiment 3

[0030] Ethylene is prepared as follows:

[0031] Hydrogen and acetylene are composed of gas phase raw materials at a molar ratio of 4:1, and are passed into the reaction system provided in Example 1 from the bottom at a flow rate of 1000mL / min, with an operating pressure of 0.2MPa, continuous reaction at 140°C, and separation and outflow from the top The gas phase product is the product.

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Abstract

The invention relates to a reaction system for preparing ethylene through acetylene hydrogenation. The reaction system is a gas phase-liquid phase two-phase contact reaction system. By means of the system, a traditional solid catalyst can be replaced by a liquid-phase catalyst, so that a traditional gas-solid two phase or gas-liquid-solid three-phase contact reaction is changed into a gas-liquid contact reaction, and coverage of the catalyst activity center by produced green oil is avoided; meanwhile, the hydrogenation activity of the liquid-phase catalyst is under the suitable condition through regulation of proportions of different kinds of complexation metals in the liquid-phase catalyst, the high conversion rate of acetylene is guaranteed, production of the green oil due to self-polymerization of acetylene is avoided, and production of ethane through deep acetylene hydrogenation can be inhibited. The invention further relates to a method for preparing the ethylene with the reaction system. By means of the method, the selectivity of production of the ethylene through acetylene hydrogenation is improved and the yield of the ethylene in product gas is increased.

Description

technical field [0001] The invention belongs to the technical field of gas treatment and processing methods, and in particular relates to a high-concentration acetylene hydrogenation reaction system and method for producing ethylene. Background technique [0002] With the depletion of petroleum resources, the development of coal chemical industry as a raw material chemical process has become an important process to replace the petrochemical route, which has attracted widespread attention and achieved rapid development. In coal chemical technology, the production of acetylene by using coal as raw material through calcium carbide process has been widely used. Using acetylene as raw material under the action of selective hydrogenation catalyst to produce ethylene products through hydrogenation can further expand the route of coal chemical industry. And in recent years, the main downstream product of acetylene, polyvinyl chloride (PVC), has been oversupplied, and the PVC industr...

Claims

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Application Information

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IPC IPC(8): C07C11/04C07C5/09
CPCY02P20/52
Inventor 闫琛洋杜少春吴道洪
Owner 北京锦泰诚瑞科技发展有限公司
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