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Process for preparing MEK (Methyl Ethyl Ketone) by utilizing C4 fraction in etherified liquefied petroleum gas

A C4 fraction and liquefied gas technology, applied in the chemical industry, can solve problems such as equipment corrosion

Inactive Publication Date: 2014-04-23
YUHUA CHEM PLANT BINZHOUSNDONG PROV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The process of this method is simple, but the equipment is severely corroded, and heavy metals are needed as catalysts. This method has not been applied to large-scale production

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] The process of preparing MEK from the C4 fraction in the liquefied gas after ether. The steps of the process are as follows:

[0040] In the MEK synthesis device, the raw materials C4, sulfuric acid and butanol enter the reactor. Under the action of the catalyst, C4 reacts with butanol and sulfuric acid to form acid sulfate and Chinese sulfate, which are diluted with water and hydrolyzed to produce sec-butyl The aqueous alcohol solution is dehydrated and concentrated to obtain sec-butanol, and pure sec-butanol is catalytically dehydrogenated by a catalyst to obtain MEK.

[0041] In the process of the present invention for preparing MEK from the C4 fraction in the liquefied gas after ether:

[0042] The temperature of the preheater is: 40~55℃;

[0043] The static mixer has a mesh structure with a pore diameter of DN50; the alcohol-to-ene ratio is 1.2;

[0044] Catalyst nickel

[0045] The pressure of the reactor is 1.0MPa±0.1;

[0046] The top temperature of the tower is 40~45℃;

[...

Embodiment 2

[0054] The process of preparing MEK from the C4 fraction in the liquefied gas after ether. The steps of the process are as follows:

[0055] In the MEK synthesis device, the raw materials C4, sulfuric acid and butanol enter the reactor. Under the action of the catalyst, C4 reacts with butanol and sulfuric acid to form acid sulfate and Chinese sulfate, which are diluted with water and hydrolyzed to produce sec-butyl The aqueous alcohol solution is dehydrated and concentrated to obtain sec-butanol, and pure sec-butanol is catalytically dehydrogenated by a catalyst to obtain MEK.

[0056] In the process of the present invention for preparing MEK from the C4 fraction in the liquefied gas after ether:

[0057] The temperature of the preheater is: 40~55℃;

[0058] The static mixer has a mesh structure with a pore diameter of DN50; the alcohol-to-ene ratio is 1.15;

[0059] Catalyst nickel

[0060] The pressure of the reactor is 1.0MPa±0.1;

[0061] The top temperature of the tower is 40~45℃;

...

Embodiment 3

[0071] The process of preparing MEK from the C4 fraction in the liquefied gas after ether. The steps of the process are as follows:

[0072] In the MEK synthesis device, the raw materials C4, sulfuric acid and butanol enter the reactor. Under the action of the catalyst, C4 reacts with butanol and sulfuric acid to form acid sulfate and Chinese sulfate, which are diluted with water and hydrolyzed to produce sec-butyl The aqueous alcohol solution is dehydrated and concentrated to obtain sec-butanol, and pure sec-butanol is catalytically dehydrogenated by a catalyst to obtain MEK.

[0073] In the process of the present invention for preparing MEK from the C4 fraction in the liquefied gas after ether:

[0074] The temperature of the preheater is: 40~55℃;

[0075] The static mixer has a mesh structure with a pore size of DN50; the alcohol-to-ene ratio is 1.3;

[0076] Catalyst zinc oxide;

[0077] The pressure of the reactor is 1.0MPa±0.1;

[0078] The top temperature of the tower is 40~45℃;

...

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Abstract

The invention belongs to the technical field of chemical industry, and particularly relates to a process for producing MEK (Methyl Ethyl Ketone) by utilizing C4 fraction in etherified liquefied petroleum gas as a raw material. The process for preparing MEK by utilizing C4 fraction in etherified liquefied petroleum gas is characterized in that in a synthesis device for MEK, the raw material C4, sulfuric acid and butyl alcohol enter a reactor in the presence of a catalyst, isobutylene in the C4 reacts with butanol and the sulfuric acid to generate ethereal sulfate and neutral sulfate; water is added for dilution, sec-butyl alcohol aqueous solution is generated by hydrolysis; dehydration and concentration are carried out to obtain sec-butyl alcohol; and pure sec-butyl alcohol is subjected to catalytic dehydrogenation by the catalyst to obtain the MEK. By adopting the process for producing MEK by taking C4 fraction in etherified liquefied petroleum gas as the raw material, the MEK yield can reach 96%.

Description

Technical field [0001] The invention belongs to the technical field of chemical industry, and specifically relates to a process for producing MEK (ethyl tert-butyl ether) from the C4 fraction in the liquefied gas after ether. Background technique [0002] Butanone is mainly used as a solvent, such as dewaxing of lubricating oil, paint industry and azeotropic distillation of various resin solvents, vegetable oil extraction process and refining process. Its advantages are strong solubility and lower volatility than acetone. Medium-boiling ketone solvents, butanone is also an intermediate for the preparation of medicines, dyes, detergents, fragrances, antioxidants and certain catalysts, synthetic anti-peeling agent methyl ethyl ketoxime, polymerization catalyst methyl ethyl ketone peroxide , Corrosion inhibitor methyl pentynol, etc., used as a developer after integrated circuit photolithography in the electronics industry. [0003] Butanone is the raw material for the preparation of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C49/10C07C45/29C07C43/04C07C41/01
CPCC07C45/29C07C41/01C07C49/10C07C43/04
Inventor 王振坤胡从盖建忠
Owner YUHUA CHEM PLANT BINZHOUSNDONG PROV
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