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Process for preparing ETBE (Ethyl Tert Butyl Ether) by using C4 fraction in etherified liquefied gas

A C4 fraction, liquefied gas technology, applied in the chemical industry, can solve the problem of unutilized reaction heat

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

[0007] From the perspective of the type of reactor, ETBE production technology can be divided into fixed bed technology and catalytic distillation technology. The fixed bed technology is adopted, the equipment is simple, and the operation is convenient. not available

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Utilize the C4 fraction in the liquefied gas after ether to prepare the technology of ETBE, the step of this technology is as follows:

[0036] In the synthesis device of ETBE, raw materials C4 and ethanol enter the reactor, and under the action of the catalyst, C4 and ethanol undergo an etherification reaction to generate ETBE. The reaction materials include excess ethanol, C4 after ether, product ETBE, by-products The product dimethyl ether and C8 tert-butanol are sent to the azeotropic distillation tower for separation, and the crude ETBE product flows out from the bottom of the azeotropic distillation tower.

[0037] The process of preparing ETBE by using the C4 fraction in the liquefied gas after ether, in this process:

[0038] The temperature of the preheater is: 40~55℃;

[0039]The static mixer is a network structure with a pore size of DN50; the alcohol-ene ratio in it is 1.15-1.3;

[0040] The catalyst is a cationic resin catalyst;

[0041] Reactor pressure...

Embodiment 2

[0051] Utilize the C4 fraction in the liquefied gas after ether to prepare the technology of ETBE, the step of this technology is as follows:

[0052] In the synthesis device of ETBE, raw materials C4 and ethanol enter the reactor, and under the action of the catalyst, C4 and ethanol undergo an etherification reaction to generate ETBE. The reaction materials include excess ethanol, C4 after ether, product ETBE, by-products The product dimethyl ether and C8 tert-butanol are sent to the azeotropic distillation tower for separation, and the crude ETBE product flows out from the bottom of the azeotropic distillation tower.

[0053] The process of preparing ETBE by using the C4 fraction in the liquefied gas after ether, in this process:

[0054] The temperature of the preheater is: 40~55℃;

[0055] The static mixer is a network structure with a pore size of DN50; the alcohol-ene ratio in it is 1.15-1.3;

[0056] The catalyst is a cationic resin catalyst;

[0057] Reactor pressur...

Embodiment 3

[0070] Utilize the C4 fraction in the liquefied gas after ether to prepare the technology of ETBE, the step of this technology is as follows:

[0071] In the synthesis device of ETBE, raw materials C4 and ethanol enter the reactor, and under the action of the catalyst, C4 and ethanol undergo an etherification reaction to generate ETBE. The reaction materials include excess ethanol, C4 after ether, product ETBE, by-products The product dimethyl ether and C8 tert-butanol are sent to the azeotropic distillation tower for separation, and the crude ETBE product flows out from the bottom of the azeotropic distillation tower.

[0072] The process of preparing ETBE by using the C4 fraction in the liquefied gas after ether, in this process:

[0073] The temperature of the preheater is: 40~55℃;

[0074] The static mixer is a network structure with a pore size of DN50; the alcohol-ene ratio in it is 1.15-1.3;

[0075] The catalyst is a cationic resin catalyst;

[0076] Reactor pressur...

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PUM

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Abstract

The invention relates to the technical field of chemical engineering, and particularly relates to a process for preparing ETBE (Ethyl Tert Butyl Ether) by using a C4 fraction in an etherified liquefied gas as a raw material. A process for preparing the ETBE by using the C4 fraction in the etherified liquefied gas is characterized in that in a synthesis device of ETBE, the raw material C4 and alcohol enter a reactor, isobutene in the C4 and the alcohol generate an etherification reaction under the action of a catalyst to generate ETBE, the reaction materials including redundant alcohol, etherified C4, product ETBE, byproduct dimethyl ether and C8 tertiary butanol are sent to an azeotrope tower so as to be separated, and an ETBE crude product flows out from the bottom of the azeotrope tower. By adoption of a process for producing the ETBE by using the C4 fraction in the etherified liquefied gas as the raw material according to the method provided by the invention, the yield of the ETBE can reach 96 percent.

Description

technical field [0001] The invention belongs to the technical field of chemical industry, and specifically relates to a process for producing ETBE (ethyl tert-butyl ether) by using C4 fraction in post-ether liquefied gas as a raw material. Background technique [0002] The isobutene in C4 undergoes etherification reaction with ethanol to produce ETBE (ethyl tert-butyl ether). Ethyl tert-butyl ether is referred to as ETBE, alias tert-butyl ethyl ether, ethyl tertiary butyl ether, is a high-octane gasoline blending component with excellent performance, and is a legal gasoline improver in the United States (including methyl tert-butyl ether) Butyl ether, ethanol and ethyl tert-butyl ether). [0003] Industrial ETBE is generally produced by the reaction of isobutene and ethanol in mixed C4 under the action of an acidic catalyst. This reaction is an exothermic reaction. The catalysts in industrial production basically use macroporous sulfuric acid ion exchange resins. The side ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C43/04C07C41/06
CPCC07C41/06C07C43/04
Inventor 胡从乔树奎王振坤
Owner YUHUA CHEM PLANT BINZHOUSNDONG PROV
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