Preparation method and preparation system for obtaining triisobutene by C4 composite oil

A technology of trimerized isobutylene and superimposed oil, which is applied in the field of preparation of carbododecene from separation and can solve the problems of difficult preparation of trimerized isobutylene, high process cost, and low purity

Active Publication Date: 2019-05-17
丹东明珠特种树脂有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the invention of the present application is to solve the technical problems of difficult preparation of trimeric isobutylene, high process cost, low purity, and small mass production, and to provide a simple process method, wide range of applicable raw materials, and high yield to prepare high-purity trimeric isobutylene. Preparation method and preparation system for obtaining trimeric isobutene from carbon four-fold oil and suitable for large-scale mass production

Method used

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  • Preparation method and preparation system for obtaining triisobutene by C4 composite oil

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] operating conditions

[0031]Wherein, a pipeline 4 at the top of the C8 rectification tower 20 C8 discharge mixes with the C4 raw material pipeline 5 and is incorporated into the feed pipe of the fixed reaction bed. Another branch line at the top of the distillation tower 20 is the C8 output line 3, and the molar ratio between the branch line 4 and the output line 3 is 1:3; The pressure is 1.5Mpa, the total space velocity of the material is 0.5h -1 , the copolymerization reaction product is merged into the light-removing tower feed pipe 1 of the separation process part by the outlet pipe 8, and after measurement, the selectivity of isobutene in the reactor 40 being converted into trimeric isobutene is 63%, and the total conversion rate of isobutene is 98%. The purity of the obtained C12 product is greater than 98%, the purity of the trimeric isobutene is greater than 90%, and the yield is greater than 99%.

Embodiment 2

[0033] operating conditions

[0034] Wherein, a pipeline 4 at the top of the C8 rectification tower 20 C8 discharge is mixed with the C4 raw material pipeline 5 and merged into the feed pipe of the fixed reaction bed, and the mol ratio of its isobutylene to C8 is 1.0, and C8 is refined Another branch line at the top of the distillation tower 20 is the C8 output line 3, and the molar ratio between the branch line 4 and the output line 3 is 1:3; The pressure is 1.2Mpa, the total space velocity of the material is 0.5h -1 , the copolymerization reaction product is merged into the light-removing tower feed pipe 1 of the separation process part by the outlet pipe 8, and after measurement, the selectivity of isobutene in the reactor 40 being converted into trimeric isobutene is 65%, and the total conversion rate of isobutene is 94%. The purity of the obtained C12 product is greater than 98%, the purity of the trimeric isobutene is greater than 90%, and the yield is greater...

Embodiment 3

[0036] operating conditions

[0037] Wherein, a pipeline 4 at the top of the C8 rectification tower 20 C8 discharge is mixed with the C4 raw material pipeline 5 and merged into the feed pipe of the fixed reaction bed, and the mol ratio of its isobutylene to C8 is 1.0, and C8 is refined Another branch line at the top of the distillation tower 20 is the C8 output line 3, and the molar ratio between the branch line 4 and the output line 3 is 1:3; The pressure is 1.2Mpa, the total space velocity of the material is 0.5h -1 , the copolymerization reaction product is merged into the light-removing tower feed pipe 1 of the separation process part by the outlet pipe 8, and after measurement, the selectivity of isobutene in the reactor 40 being converted into trimeric isobutene is 63%, and the total conversion rate of isobutene is 96%. The purity of the obtained C12 product is greater than 98%, the purity of the trimeric isobutene is greater than 90%, and the yield is greater...

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Abstract

The application provides a preparation method and a preparation system for obtaining triisobutene by C4 composite oil. The method for preparing the triisobutene comprises the following steps: separating light components of the C4 composite oil and C8; then mixing the separated C8 with isobutene-containing hybrid C4, and carrying out preparation reaction of copolymerization C12; separating the light components, the C8 and the C12 to obtain the triisobutene of the C12. A system device of the preparation system comprises a copolymerization part and a separation flow part consisting of a lightlowcomponent removal tower, a C8 rectification tower and a C12 rectification tower. According to the technical scheme, the technical difficult problems of difficult preparation of the triisobutene, highprocess cost, low purity and low yield are solved.

Description

technical field [0001] This patent application relates to the chemical separation technology of petroleum components, in particular, to a preparation method and a preparation system for obtaining carbon dodecene mainly by separation using C4 superimposed oil as a raw material. Background technique [0002] Trimeric isobutylene is a fine chemical raw material, widely used as a tackifier, various surfactants and plasticizers for rubber synthesis. At present, there is no relatively mature technology for preparing trimeric isobutylene finished products. [0003] Patent publication technologies DD160037 and DD152330 describe a catalyst for preparing low-carbon dimer olefin and its preparation process. The catalyst is prepared by depositing nickel hydroxide and aluminum hydroxide on silica gel or X-amorphous aluminum silicate, using aqueous ammonia solution as a precipitant, and performing suction filtration, washing, drying, molding and roasting. The process method is as follow...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C7/04C07C11/02C07C2/08
Inventor 吕晓东王义成冷东斌段宏毅管秀明彭慧敏张蕾孙明丽
Owner 丹东明珠特种树脂有限公司
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