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A kind of method that is produced ethylene by acetate

A technology of acetate and ethylene, applied in chemical instruments and methods, bulk chemical production, hydrocarbons, etc., can solve the problems of acetic acid price drop, acetic acid overcapacity, etc., and achieve the effect of broadening raw material channels

Inactive Publication Date: 2018-01-26
DATANG INT CHEM TECH RESINST
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Problems solved by technology

With the shortage of oil resources in the world and the emphasis on clean energy, the scale of domestic coal chemical industry has expanded rapidly in recent years, but this has led to a continuous decline in the price of coal chemical product acetic acid, and the domestic acetic acid production capacity is seriously overcapacitated. However, no new consumption of acetic acid has been formed so far. Demand to digest acetic acid capacity

Method used

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  • A kind of method that is produced ethylene by acetate

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Embodiment

[0038] Combine below figure 1 Specific embodiments will be described.

[0039] Embodiment Gas chromatography is used to analyze the concentration of acetate and ethylene before and after the reaction, so as to calculate the conversion rate of acetate and the selectivity of ethylene.

[0040] Ethyl acetate 1 is pumped into the acetate preheater 2 through a high-pressure liquid feed pump, wherein the feed rate of ethyl acetate 1 is 150mol / h, and the high-temperature hydrogenation product gas 12 from the hydrogenation reactor 11 is in the acetate preheater 2. Heat exchange preheating occurs in the preheater 2 to obtain ethyl acetate vapor 3 at 250°C. The mixed hydrogen 5 obtained after the hydrogen 4 is mixed with the high-pressure cycle gas 23 is fed into the hydrogen preheater 6, wherein the flow rate of the hydrogen 4 is 27Nm 3 / h, after heat exchange, high-temperature hydrogen gas 7 with a temperature of 230°C is obtained.

[0041]Mix high-temperature hydrogen gas 7 and et...

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Abstract

The invention relates to a method for preparing high-purity ethylene from acetate. In the method, acetate is used as a raw material to couple the hydrogenation-dehydration process, and a high acetate conversion rate and high ethylene selectivity are realized under the action of a catalyst. The product gas obtained by the reaction is After separation, high-purity ethylene is obtained, which has the characteristics of high ethylene purity, short production cycle, not easy to cause environmental pollution, and relatively simple subsequent separation. At the same time, the reaction heat is fully utilized to preheat the reaction raw materials to reduce heating and cooling energy consumption, and the process is simple and easy to control.

Description

technical field [0001] The invention relates to a method for producing ethylene. In particular, the present invention relates to a process for the production of ethylene using acetate. It belongs to the field of chemical technology. Background technique [0002] The demand for ethylene as a substitute is becoming more and more urgent, and more than 70% of chemical products are produced directly or indirectly by ethylene, known as the "leader" of the petrochemical industry. With the rapid development of ethylene derivative industries such as chemical industry, energy and materials, the demand for ethylene is increasing. [0003] At present, ethylene production methods at home and abroad include petroleum raw material catalytic cracking method and ethanol dehydration method, CN1269341A has reported ethane oxidative cracking ethylene process; CN86104433A has reported the method for the selective production of ethylene and propylene with ethane and propane; CN1280117A has repo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C11/04C07C1/213
CPCY02P20/52
Inventor 李春启余铭程刘学武梅长松
Owner DATANG INT CHEM TECH RESINST
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