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Method for improving content of 2-methyl-2-butylene

A technology of butene and methyl, which is applied in the field of increasing the content of 2-methyl 2-butene, can solve the problems of increasing the burden of product purification, and achieve the effect of eliminating abnormal fluctuations in catalyst bed temperature and reducing content

Active Publication Date: 2017-04-26
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But its disadvantage is that another substance is introduced into the reaction system, which obviously increases the burden of product purification

Method used

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  • Method for improving content of 2-methyl-2-butylene
  • Method for improving content of 2-methyl-2-butylene
  • Method for improving content of 2-methyl-2-butylene

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Experimental program
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Embodiment

[0022] Embodiment [1-10]

[0023] Embodiments 1 to 10 use methyl tert-amyl ether as a raw material to obtain isopentene products with higher 2-methyl-2-butene content through the following process:

[0024] 1) methyl tert-amyl ether is carried out etherolysis reaction by gas phase through the catalyst bed of sulfonic acid group cation exchange resin, and methyl tert-amyl ether is decomposed into isopentene and methanol;

[0025] 2) Obtain etherolysis reaction product isopentene by step 1) and carry out isomerization reaction through catalyst bed layer with liquid phase, catalyzer is noble metal catalyst, the 2-methyl-1-butene in isopentene is converted into 2 - Methyl-2-butene;

[0026] 3) The crude isopentene obtained in step 2) can be further rectified, methanol and heavy component impurities are removed from the tower bottom, and the isopentene product is obtained at the top of the tower.

[0027] The technological conditions of each embodiment are shown in Table 1 and Ta...

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PUM

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Abstract

The invention discloses a method for improving the content of 2-methyl-2-butylene and particularly relates to a method for improving the content of 2-methyl-2-butylene in isopentene by taking tert-amyl methyl ether as a raw material and adopting methods for ether reaction, isomerization reaction and purification by rectification. Through the technical processes, the mass ratio of 2-methyl-2-butylene to 2-methyl-1-butylene in isopentene can be improved to (8-14):1, so that the quality requirements for subsequent processing are met.

Description

technical field [0001] The present invention relates to a method for increasing the content of 2-methyl-2-butene, in particular to isoamyl obtained through the etherolysis of methyl tert-amyl ether, which further undergoes a hydroisomerization reaction to increase the content of 2-methyl-2-butene in isoamyl. The method of base-2-butene content. Background technique [0002] Isoamyl is an important chemical raw material, used to produce pinacolone, and then to produce high-efficiency triazole fungicides, plant growth regulators, herbicides, etc. It is also used as an intermediate for many spices and pesticides, and can also be used as UV absorbers, photographic photosensitive materials and concrete dispersants, etc. . Isoamyl is usually a mixture of 2-methyl-2-butene and 2-methyl-1-butene. Since only 2-methyl-2-butene is the active ingredient for most reactions, isoamyl The higher the 2-methyl-2-butene content, the higher the application value. [0003] Isoamylene mainly ...

Claims

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Application Information

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IPC IPC(8): C07C11/10C07C5/25C07C1/20
CPCC07C1/20C07C5/2556C07C2521/04C07C2523/44C07C11/10
Inventor 黄勇许惠明秦技强孙荣华罗群王萍王世卿
Owner CHINA PETROLEUM & CHEM CORP
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