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Oligomerization reaction method of isobutene

A technology of isobutene and reaction, applied in the field of oligomerization of isobutene, can solve the problem of low dimer selectivity

Active Publication Date: 2020-07-07
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0014] Aiming at the problem of low dimer selectivity in the isobutylene oligomerization reaction in the prior art, the present invention provides a method for isobutylene oligomerization, using heteropolyacid / aluminum-based composite oxide as a catalyst, which has good reaction performance, and high dimer selectivity

Method used

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  • Oligomerization reaction method of isobutene
  • Oligomerization reaction method of isobutene

Examples

Experimental program
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Embodiment 1

[0028] (1) Prepare 5g of aluminum nitrate and 10g of magnesium nitrate into aqueous solution a with a mass concentration of 20%, and then prepare a potassium hydroxide alkaline solution b with a mass concentration of 15%, and dissolve solution b under normal temperature and stirring Add it dropwise to solution a, react for 6 hours to obtain a white paste precipitate, wash, filter, and dry at 120°C for 10 hours, then extrude it according to the conventional method, and then roast it at 500°C for 8 hours to obtain the composite oxide carrier MgO-Al 2 o 3 .

[0029] (2) Dissolve phosphomolybdic acid in deionized water, immerse the above-mentioned shaped and calcined catalyst carrier in the phosphomolybdic acid solution for 12 hours, dry the impregnated material at 110°C for 12 hours, and roast at 350°C for 10 hours, Prepare the catalyst, and the catalyst composition is shown in Table 1.

[0030] (3) The prepared catalyst is used for the oligomerization of isobutene. The reactio...

Embodiment 2-10

[0032]Other conditions are the same as in Example 1, except that the consumption of magnesium nitrate and phosphomolybdic acid is changed to obtain catalysts of different compositions, see Table 1, adjust the reaction temperature when used for isobutylene oligomerization, specifically see Table 1, isobutylene conversion and dimerization The results of material selectivity are shown in Table 2.

Embodiment 11

[0034] Other conditions are the same as in Example 1, except that magnesium nitrate is changed into zirconium tetrachloride, and phosphomolybdic acid is changed into silicomomolybdic acid to obtain catalysts with different components and compositions, as shown in Table 1, and the results for isobutylene oligomerization are shown in Table 2.

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Abstract

The invention discloses an oligomerization reaction method of isobutene. A heteropoly acid / aluminum-based composite oxide is used as a catalyst, wherein the aluminum-based composite oxide is selectedfrom at least one of MgO-Al2O3 and ZrO2-Al2O3, and the heteropoly acid is selected from at least one of phosphotungstic acid, silicotungstic acid, arsenotungstic acid, germanotungstic acid, phosphomolybdic acid, silicomolybdic acid, arsenomolybdic acid and germanomolybdic acid. The method disclosed by the invention can achieve continuous production, is simple and convenient to operate in the reaction process, has the advantages of high conversion rate, good dimer selectivity and the like when being used for isobutene oligomerization reaction, and is a green and environment-friendly new process.

Description

technical field [0001] The invention relates to a method for oligomerization of isobutylene, in particular to a method for catalyzing the oligomerization of isobutylene with a heteropolyacid / aluminum-based composite oxide as a catalyst. Background technique [0002] At present, isobutene is mostly used in the synthesis of methyl tert-butyl ether (MTBE), which is used as a blending component of high-octane motor gasoline. However, this method of using isobutylene has become unreasonable due to the serious polluting effect of methyl tert-butyl ether on ground water. Therefore, for C 4 It is of great practical significance to seek a more reasonable utilization of isobutene in distillates. [0003] Oligomerization of low-carbon olefins is one of the important chemical processes in oil refining and organic chemical industry. The oligomerization product of butene is an important chemical intermediate, which can be used to produce oligomerized gasoline and diesel oil, as well as ...

Claims

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Application Information

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IPC IPC(8): C07C2/14C07C11/02B01J31/18
CPCC07C2/14B01J27/19C07C11/02Y02P20/52
Inventor 霍稳周吕清林姜睿
Owner CHINA PETROLEUM & CHEM CORP
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