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A kind of solvent and method adopted by hydrogenation of acetylene to produce ethylene

A technology for acetylene hydrogenation and ethylene production, which is applied in the petrochemical field, can solve the problems of not much promoting effect of reaction conversion rate and low hydrogen solubility, and achieve the effects of preventing deep hydrogenation, improving selectivity and simple process

Active Publication Date: 2018-04-20
BEIJING HUAFU ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the actual reaction, it is found that the solvents selected by the two are only soluble to acetylene, and have little solubility to hydrogen, which does not have much effect on improving the reaction conversion rate.

Method used

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  • A kind of solvent and method adopted by hydrogenation of acetylene to produce ethylene
  • A kind of solvent and method adopted by hydrogenation of acetylene to produce ethylene

Examples

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preparation example Construction

[0044] In the preparation process of the complexed metal catalyst, because metal ions are prone to produce hydroxide precipitation at high pH value, a stabilizer can be added to prevent the generation of precipitation. Therefore, the complexed metal catalyst can also include A small amount of stabilizer.

[0045] Preferably, the stabilizer includes one or more of sorbitan, glucose and fructose. The amount of the stabilizer is enough to ensure that metal ions do not precipitate and the properties of the complexed metal catalyst remain stable in the reaction system.

[0046] Preferably, the molar ratio of hydrogen to acetylene is 5-6:1, preferably 5-5.5:1, more preferably 5:1.

[0047] Preferably, the total flow rate of hydrogen and acetylene is 1500-2000mL / min, preferably 1500mL / min-1600mL / min.

[0048] Preferably, the reaction temperature is 110-150°C, preferably 120-130°C.

[0049] Preferably, the operating pressure is 0.4-1 MPa, preferably 0.4-0.6 MPa, more preferably 0.5...

Embodiment 1

[0055] A method for producing ethylene by hydrogenation of acetylene:

[0056] Using a slurry bed reactor, the gas phase contains hydrogen and acetylene;

[0057] The liquid phase is composed of the following raw materials: 99g of hydrogenated tail oil fraction with a distillation range of 300°C-600°C, and 1g of complexed palladium prepared with nitrilotriacetic acid as a complexing agent;

[0058] Operating temperature: 110°C;

[0059] Operating pressure: 0.4MPa;

[0060] Gas phase flow rate: 1500mL / min;

[0061] Molar ratio of hydrogen to acetylene: 5:1;

[0062] Continuous reaction, gas phase product is collected from the top of the slurry bed reactor to obtain the product.

Embodiment 2

[0064] A method for producing ethylene by hydrogenation of acetylene:

[0065] Using a slurry bed reactor, the gas phase contains hydrogen and acetylene;

[0066] The liquid phase is composed of the following raw materials: 95g of hydrogenated tail oil fraction with a distillation range of 300°C-600°C, 3g of complexed palladium prepared with ethylenediaminetetraacetic acid as a complexing agent, and ethylenediaminetetraacetic acid as a complexing agent 1g of complexed manganese prepared as a complexing agent, and 1g of complexed iron prepared with ethylenediaminetetraacetic acid as a complexing agent;

[0067] Operating temperature: 150°C;

[0068] Operating pressure: 1.0MPa;

[0069] Gas phase flow rate: 2000mL / min;

[0070] Hydrogen and acetylene molar ratio: 6:1;

[0071] Continuous reaction, gas phase product is collected from the top of the slurry bed reactor to obtain the product.

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Abstract

The invention provides a solvent adopted for ethylene preparation through acetylene hydrogenation and a method. The solvent is hydrogenated tail oil which serves as the solvent of ethylene preparation through pure acetylene hydrogenation so as to realize the effect of excellent solubility on green oil, the probability that the green oil covers the surface of a catalyst is greatly reduced, and the service life of the catalyst is prolonged; the boiling point of the solvent is high, the saturated steam pressure is low, and the solvent is not distilled off along with an ethylene product in the hydrogenation reaction, so that increase of the separation cost of a subsequent unit is avoided; the heat stability is good, decomposing does not occur at the reaction temperature, impurities are not generated, and the quality of the ethylene product is guaranteed; and the solvent dissolves a certain amount of green oil, and the acetylene hydrogenation green oil generating reaction can be inhibited.

Description

technical field [0001] The invention relates to the technical field of petrochemical industry, in particular to a solvent and a method for hydrogenation of acetylene to ethylene. Background technique [0002] Ethylene is an important basic raw material in modern industry and one of the most produced chemicals in the world. Ethylene production has become a symbol to measure the development level of a country's petrochemical industry, and its production capacity is regarded as the embodiment of a country's economic strength. [0003] Ethylene is mainly produced by cracking petroleum hydrocarbons. Petroleum is a non-renewable resource, and its price fluctuates greatly with changes in the international environment. At present, my country's annual oil consumption ranks second in the world. In 2014 and 2015, my country's dependence on foreign oil reached 59.6% and 60.4%, respectively. This poses a serious strategic threat to my country, which is not rich in oil resources. Theref...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G45/32C07C5/09C07C11/04
CPCC07C5/09C10G45/32C10G2400/20C07C11/04
Inventor 王洲晖郝毅张晶曹宏成史雪君吴兴松
Owner BEIJING HUAFU ENG
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