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The process of preparing mtbe by using the c4 fraction in the liquefied gas after ether

A C4 distillate and liquefied gas technology, applied in the chemical industry, can solve the problems that the use effect of pure combustion is not as good as that of civil gas, and the price is expensive

Inactive Publication Date: 2016-06-08
YUHUA CHEM PLANT BINZHOUSNDONG PROV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Ether C4 can be used as civil liquefied gas, but its price is more expensive than ordinary civil gas, and the effect of pure combustion is not as good as civil gas

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] In the synthesis device of MTBE, the raw materials C4 and methanol enter the reactor, and under the action of the catalyst, the isobutene in C4 undergoes an etherification reaction with methanol to generate MTBE. The reaction materials include excess methanol, C4 after ether, product MTBE, by-product dimethyl ether, and C8 tert-butanol are sent to the azeotropic distillation tower for separation, and the crude MTBE product flows out from the bottom of the azeotropic distillation tower.

[0024] Utilize the C4 fraction in the liquefied gas after ether to prepare the technology of MTBE, the parameter of this technology is as follows:

[0025] The temperature of the preheater is: 40~55℃;

[0026] The static mixer is a network structure with a pore size of DN50; the alcohol-ene ratio is 1.2;

[0027] The catalyst is a cationic resin catalyst;

[0028] Reactor pressure 1.0MPa±0.1;

[0029] The temperature at the top of the tower is 40-45°C;

[0030] The intermediate temp...

Embodiment 2

[0038] In the synthesis device of MTBE, the raw materials C4 and methanol enter the reactor, and under the action of the catalyst, the isobutene in C4 undergoes an etherification reaction with methanol to generate MTBE. The reaction materials include excess methanol, C4 after ether, product MTBE, by-product dimethyl ether, and C8 tert-butanol are sent to the azeotropic distillation tower for separation, and the crude MTBE product flows out from the bottom of the azeotropic distillation tower.

[0039] Utilize the C4 fraction in the liquefied gas after ether to prepare the technology of MTBE, the parameter of this technology is as follows:

[0040] The temperature of the preheater is: 40~55℃;

[0041] The static mixer is a network structure with a pore size of DN50; the alcohol-ene ratio is 1.15;

[0042] The catalyst is a cationic resin catalyst;

[0043] Reactor pressure 1.0MPa±0.1;

[0044] The temperature at the top of the tower is 40-45°C;

[0045] The intermediate tem...

Embodiment 3

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

[0053] Utilize the C4 fraction in the liquefied gas after ether to prepare the technology of MTBE, the parameter of this technology is as follows:

[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 is 1.3;

[0056] The catalyst is a cationic resin catalyst;

[0057] Reactor pressure 1.0MPa±0.1;

[0058] The temperature at the top of the tower is 40-45°C;

[0059] The intermediate temp...

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Abstract

The invention belongs to the technical field of chemical techniques, and in particular relates to a process for preparing MTBE (Methyl Tert Butyl Ether) from C4 fraction in an etherified liquefied gas. The process for preparing MTBE (Methyl Tert Butyl Ether) from the C4 fraction in the etherified liquefied gas is characterized in that in an MTBE synthesis device, raw materials C4 and methanol are fed into a reactor, on the presence of a catalyst, isobutene in C4 and methanol are subjected to etherification reaction so as to generate MTBE; the reaction material comprising surplus methanol, etherified C4, the product MTBE, a byproduct dimethyl ether and C8 tertiary butanol is fed into an azeotrope tower; a crude MTBE product flows out from the bottom of the azeotrope tower. By adopting the process for producing MTBE from the C4 fraction in the etherified liquefied gas as the raw material by using the method provided by the invention, the yield of MTBE can be 96%.

Description

technical field [0001] The invention belongs to the technical field of chemical industry, and specifically relates to a process for producing MTBE (methyl tert-butyl ether) by using the C4 fraction in post-ether liquefied gas as a raw material. Background technique [0002] The isobutene in C4 undergoes etherification reaction with methanol to produce MTBE (methyl tert-butyl ether). The product MTBE is used to produce high-purity isobutene, or as an additive to increase the octane number in the production of high-grade gasoline, and the excess methanol in the etherification reaction is recycled for use. The mixed C4 after the etherification reaction is called post-ether C4, and its main components are isobutane, n-butane, n-butene, cis-2-butene, trans-2-butene and a small amount of butadiene. Ether carbon four can be used as civil liquefied gas, but its price is more expensive than ordinary civil gas, and the effect of pure combustion is not as good as civil gas. [0003] ...

Claims

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Application Information

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Patent Type & Authority Patents(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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