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Method and device for preparing diisobutylene, triisobutylene and tetraisobutylene by isobutene polymerization

A technology of triisobutene and diisobutene, which is applied in the field of isobutene polymerization, can solve the problems of many by-product high polymers, difficulty in controlling the degree of polymerization, unstable operation, etc., achieve low raw material specification requirements, easy temperature control, and reduce production costs Effect

Inactive Publication Date: 2017-07-11
SHANDONG CHENGTAI CHEM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the difficulty of using isobutene to produce diisobutene, triisobutene and tetraisobutene mainly lies in the fact that the heat of reaction is too large, the degree of polymerization is difficult to control, it is easy to overheat, the operation is very unstable, and there are many by-products and high polymers in the product. And it is easy to cause pipeline blockage. The present invention perfectly solves the above problems and obtains qualified products.

Method used

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  • Method and device for preparing diisobutylene, triisobutylene and tetraisobutylene by isobutene polymerization
  • Method and device for preparing diisobutylene, triisobutylene and tetraisobutylene by isobutene polymerization

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Embodiment 1

[0044] Embodiment 1, a kind of isobutene polymerization prepares the method for diisobutene, triisobutene and tetraisobutene, comprises the steps:

[0045] 1. Catalyst preparation steps;

[0046] The catalyst is composed of the following parts by weight, 10 parts of amorphous silicon aluminum, 20 parts of molecular sieve, 13 parts of magnesium oxide, 9 parts of sodium carbonate, 13 parts of activated carbon, 8 parts of basic aluminum sulfate, 8 parts of kaolin, 17 parts of boron, 15 parts of ferric oxide, 25 parts of nano zinc oxide particles, 8 parts of calcium oxide;

[0047] Described molecular sieve is the mixture of SAPO-11 molecular sieve and beta zeolite molecular sieve, and the mass ratio of SAPO-11 molecular sieve and beta zeolite molecular sieve is 1:2;

[0048] The particle size of the nano zinc oxide particles is 50-10nm, and the length is 80-30nm.

[0049]The relative crystallinity of the SAPO-11 molecular sieve is 98%, and the crystal particle size is 2.0 μm; ...

Embodiment 2

[0063] Example 2, such as figure 1 , figure 2 As shown, a device for preparing diisobutene, triisobutene and tetraisobutene by polymerization of isobutene includes an isobutene high-efficiency polymerization device R1, a primary product heat exchanger E1, a secondary product heat exchanger E2, and a tertiary product heat exchanger E3, Raw material preheater E4, primary product circulating pump P1, secondary product circulating pump P2, tertiary product circulating pump P3, polymerization inhibitor feeding pump P4, raw material pump P5, static mixer H1.

[0064] The isobutylene high-efficiency polymerization device R1 includes a tank body. The tank body 1 is respectively provided with a raw material inlet a1, a secondary polymerization crude product feed port a2, and a tertiary polymerization crude product feed port a3 from top to bottom on the tank body 1. From top to bottom, there are also first-level polymerization crude product outlet b2, second-level crude product outlet...

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Abstract

The invention discloses a method and a device for preparing diisobutylene, triisobutylene and tetraisobutylene by isobutene polymerization, the method includes a catalyst preparation step and a catalytic reaction step; the catalytic reaction step is as follows: weighing a catalyst, adding the catalyst into a fixed bed thermostatic section, using a high temperature resistant material for fixing the two ends of the catalyst, heating to 120 DEG C to 180 DEG C, introducing a liquid mixed carbon-4 material with the isobutylene content of 25%-80% and a polymerization inhibitor in the flow rate of 20-50ml / h, controlling reaction pressure at 1-5MPa, and reacting for 5h to obtain the diisobutylene, the triisobutylene and the tetraisobutylene at a reactor outlet. The diisobutylene, the triisobutylene and the tetraisobutylene can be simultaneously produced, the temperature is easy to control, the method has the advantages of less by-product, high purity, high conversion rate, high recovery rate, continuous production, and the purity of the product can reach 99.8%.

Description

technical field [0001] The invention relates to the technical field of isobutene polymerization, in particular to a method and a device for preparing diisobutene, triisobutene and tetraisobutene by isobutene polymerization. Background technique [0002] my country has abundant isobutylene resources, it is a very good chemical raw material, but currently it is mainly used to produce methyl tert-butyl ether, tert-butanol, butyl rubber, etc. with low added value and huge demand. For isobutylene, it is a very serious waste of resources. [0003] Since methyl tert-butyl ether, as a gasoline additive, has potential pollution risks to water sources, it has been banned in the United States, making its production and application prospects very uncertain. Therefore, a new chemical process is developed to prepare isobutene into diisobutene, triisobutene and tetraisobutene, which become high value-added products and solve the problem of isobutene. Therefore, it becomes necessary to dev...

Claims

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Application Information

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IPC IPC(8): C07C11/02C07C2/12B01J29/85C07C7/20
CPCC07C2/12B01J29/005B01J29/7615B01J29/85B01J2229/18C07C7/20C07C2529/80C07C11/02
Inventor 刘明久韩海滨文斌李金
Owner SHANDONG CHENGTAI CHEM IND
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