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Method for preparing isobutene through n-butene skeletal isomerization

A technology of n-butene and isobutene, which is applied in the field of preparing isobutene by skeletal isomerization of n-butene, can solve problems such as poor catalyst stability, and achieve the effect of good stability

Active Publication Date: 2016-01-27
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The technical problem to be solved by the present invention is that there is a problem of poor catalyst stability in the prior art, and a new method for preparing isobutene through isomerization of n-butene is provided

Method used

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  • Method for preparing isobutene through n-butene skeletal isomerization
  • Method for preparing isobutene through n-butene skeletal isomerization
  • Method for preparing isobutene through n-butene skeletal isomerization

Examples

Experimental program
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Effect test

Embodiment 1

[0025] [Example 1] Synthetic directing agent

[0026] Press 1Al 2 o 3 :29.8SiO2 2 :4.33M 2 O:12.07R:1523H 2 O molar ratio, 1.03 gram of sodium aluminate is dissolved in 76.08 gram of water, add 0.99 gram of potassium hydroxide to dissolve, add template agent ethylenediamine 3.00 gram, stir evenly, add the silica sol 18.51 gram that concentration is 40w%, stir 1 Hours, placed in an oven at 40°C, and left to stand for three days, the resulting mixture was the directing agent.

Embodiment 2

[0027] [Example 2] synthetic directing agent

[0028] Press 1Al 2 o 3 :30.02SiO2 2 :3.03M 2 O:20.08R:2015H 2 The molar ratio of O is that 1.52 grams of aluminum sulfate is dissolved in 112.50 grams of water, and 1.00 grams of sodium hydroxide is added to dissolve, and 8.21 grams of template agent cyclohexylamine are added, stirred evenly, and the addition concentration is 18.60 grams of 40w% silica sol, stirred for 1 hour, Place it in an oven at 60°C and let it stand for three days to obtain a mixture that is the directing agent.

Embodiment 3

[0029] [embodiment 3] synthetic directing agent

[0030] Press 1Al 2 o 3 :60.03SiO2 2 :6.01M 2 O:18.33R:999.4H 2 The molar ratio of O is to dissolve 1.37 grams of sodium aluminate in 69.20 grams of water, add 2.67 grams of sodium hydroxide to dissolve, add 10.00 grams of template agent pyridine, stir evenly, add a modulus of 3.1, with SiO 2 45.60 grams of water glass with a concentration of 42w%, stirred for 1 hour, placed in an oven at 80° C., and left to stand for two days, the resulting mixture was used as the directing agent.

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Abstract

The present invention relates to a method for preparing isobutene through n-butene skeletal isomerization. A purpose of the present invention is mainly to solve the problem of poor stability of the catalyst in the prior art. According to the present invention, the raw material containing n-butene contacts the catalyst to carry out a skeletal isomerization reaction so as to generate the effluent containing isobutylene, wherein the catalyst is the ZSM-35 molecular sieve prepared by using the directing agent method. With the technical scheme of the present invention, the problem in the prior art is well solved, and the method can be used in the isobutene preparation from the n-butene in the industrial production.

Description

technical field [0001] The invention relates to a method for preparing isobutene through isomerization of n-butene. Background technique [0002] Isobutylene is C 4 One of the important components of hydrocarbons, it is an important organic chemical raw material, mainly used in the synthesis of methyl tert-butyl ether (MTBE), butyl rubber, methyl methacrylate (MMA), polybutene and polyisobutylene Wait. Isobutene can prepare a series of different products according to its raw material specifications, such as: mixed C 4 Isobutene with a content of more than 90% can produce MMA, isoprene, etc.; isobutene with a content of more than 99% can produce butyl rubber, polyisobutylene, 2,4-di-tert-butylcresol, tert-butylamine, pivalic acid, methallyl chloride and other products. [0003] The raw material of isobutene mainly comes from the following ways: C of naphtha steam cracking unit 4 Distillate (after butadiene extraction, the obtained raffinate-1 contains about 45m% isobuten...

Claims

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Application Information

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IPC IPC(8): B01J29/65C07C11/09C07C5/25
Inventor 李亚男金照生周海春孙兰萍
Owner CHINA PETROLEUM & CHEM CORP