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Device and method for producing ethylene through hydrogenation of high concentration acetylene

A technology for acetylene hydrogenation and ethylene production, which is applied in the petrochemical field, can solve problems such as complex reaction process, and achieve the effects of simple process, avoiding multi-column rectification and separation, and advanced process.

Inactive Publication Date: 2016-03-23
BEIJING HUAFU ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, when removing acetylene in the petroleum industry, the millisecond cracking furnace is usually used, and at the same time, the original one-stage hydrogenation process is changed to a multi-stage hydrogenation process with three beds connected in series and inter-stage cooling. The reaction process is relatively complicated.

Method used

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  • Device and method for producing ethylene through hydrogenation of high concentration acetylene

Examples

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Effect test

Embodiment 1

[0064] Acetylene from outside enters the acetylene tank, the pressure of acetylene entering the acetylene tank is 0.02-0.2MPaG, preferably 0.15MPaG in this example, and the temperature is -20-40°C, preferably 10°C in this example. Mix with the solvent in the acetylene tank and dissolve completely in the solvent. The solvent is one or more combinations of N-methylpyrrolidone, dimethylformamide, dimethyl sulfoxide, monomethylamine and acetone. In this example, N - Methylpyrrolidone. The flow ratio of solvent to acetylene is 2-20:1 (mass ratio), preferably 10:1 in this example. The solvent carrying acetylene is boosted by a pump, heated by a heat exchanger, and then sent to the acetylene hydrogenation reactor. Hydrogen is mixed with acetylene at the inlet of the acetylene hydrogenation reactor and sent into the hydrogenation reactor together. The hydrogen feed temperature is 20-200°C, preferably 40°C in this example. The feed pressure is 0.2-2.0MPaG, preferably 1.5MPaG in this...

Embodiment 2

[0075] Acetylene from outside enters the acetylene tank, the pressure of acetylene entering the acetylene tank is 0.02-0.2MPaG, preferably 0.15MPaG in this example, and the temperature is -20-40°C, preferably -10°C in this example. Mix with the solvent in the acetylene tank and completely dissolve in the solvent. The solvent is one or more combinations of N-methylpyrrolidone, dimethylformamide, dimethyl sulfoxide, monomethylamine and acetone. In this case, acetone is preferred . The flow ratio of solvent to acetylene is 2-20:1 (mass ratio), preferably 5:1 in this example. The solvent carrying acetylene is boosted by a pump, heated by a heat exchanger, and then sent to the acetylene hydrogenation reactor. Hydrogen is mixed with acetylene at the inlet of the acetylene hydrogenation reactor and sent into the hydrogenation reactor together. The hydrogen feed temperature is 20-200°C, preferably 40°C in this example. The feed pressure is 0.2-2.0MPaG, preferably 0.45MPaG in this e...

Embodiment 3

[0082] Acetylene from outside enters the acetylene tank, the pressure of acetylene entering the acetylene tank is 0.02-0.2MPaG, preferably 0.15MPaG in this example, and the temperature is -20-40°C, preferably -10°C in this example. Mix with the solvent in the acetylene tank and completely dissolve in the solvent. The solvent is one or more combinations of N-methylpyrrolidone, dimethylformamide, dimethyl sulfoxide, monomethylamine and acetone. In this case, acetone is preferred . The flow ratio of solvent to acetylene is 2-20:1 (mass ratio), preferably 5:1 in this example. The solvent carrying acetylene is boosted by a pump, heated by a heat exchanger, and then sent to the acetylene hydrogenation reactor. Hydrogen is mixed with acetylene at the inlet of the acetylene hydrogenation reactor and sent into the hydrogenation reactor together. The hydrogen feed temperature is 20-200°C, preferably 40°C in this example. The feed pressure is 0.2-2.0MPaG, preferably 0.45MPaG in this e...

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Abstract

The invention provides a device and method for producing ethylene through hydrogenation of high concentration acetylene. The device comprises an acetylene hydrogenation reactor, a solvent absorbing tower, and an ethylene condensing device. The structure of the device is simple. An acetylene feed pipeline is connected to the acetylene hydrogenation reactor through an acetylene solvent tank; acetylene is dissolved into a solvent and then introduced into the acetylene hydrogenation reactor; through liquid phase pressurization, the pressure limitation of acetylene is overcome, thus hydrogenation of acetylene can be carried out under a pressure of 1.5 MPaG or more; the acetylene hydrogenation reactor is connected to the solvent absorbing tower, after the acetylene hydrogenation, the obtained gas phase is absorbed by the solvent, the multi-tower rectification separation in the conventional technology is not needed therefore, and the energy consumption is low. The provided device and method can utilize the excess calcium carbide product, greatly relieves the demand on ethylene in our country, and has an important meaning for the sustainable development of acetylene industry of our country, energy saving, and emission reduction.

Description

technical field [0001] The invention relates to the technical field of petrochemical industry, in particular to a device and method for hydrogenating high-concentration acetylene to produce 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 the cracking of petroleum hydrocarbons. Petroleum is a scarce 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 2011, the dependence on foreign oil has reached 56.5%, which poses a serious strategic threat to my country, which has not rich oil reserves. Therefore, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C11/04C07C5/09
CPCC07C5/09C07C11/04Y02P20/10Y02P20/584
Inventor 郝毅侯丽伟王洲晖杨春生杨守成李秀芝唐振华
Owner BEIJING HUAFU ENG
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