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Isobutylene oligomerization method

An isobutylene and titanium-based technology, applied in chemical instruments and methods, hydrocarbons, organic compounds/hydrides/coordination complex catalysts, etc., can solve the problem of low dimer selectivity

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

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Problems solved by technology

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

Method used

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Examples

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Effect test

Embodiment 1

[0028] (1) Prepare 20g of aluminum nitrate and 25g of titanium tetrachloride into an aqueous solution a with a mass concentration of 25%, and then prepare a potassium hydroxide alkaline solution b with a mass concentration of 20%, and dissolve the Solution b was added dropwise to solution a, reacted for 10 hours to obtain a white paste precipitate, washed, filtered, dried at 120°C for 10 hours, then extruded according to the conventional method, and then roasted at 500°C for 8 hours to obtain a titanium-based composite oxide carrier.

[0029] (2) Dissolve 15g of phosphomolybdic acid in 200mL of deionized water, and immerse the above-mentioned shaped and roasted catalyst carrier in the heteropolyacid solution for 8 hours, and dry the impregnated material at 120°C for 10 hours, Calcined for 10 hours, the catalyst was prepared, and the composition of the catalyst is shown in Table 1.

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

Embodiment 2-5

[0032]Other conditions are the same as in Example 1, except that the consumption of aluminum 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 rate and dimerization The results of material selectivity are shown in Table 2.

Embodiment 6

[0034] Other conditions are the same as in Example 1, except that aluminum nitrate is changed into zirconium tetrachloride, phosphomolybdic acid is changed into silicomomolybdic acid, and catalysts of different components and compositions are obtained, 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 isobutylene oligomerization method, wherein a heteropoly acid / titanium-based composite oxide is used as a catalyst, the titanium-based composite oxide is selected from at least one of TiO2-Al2O3, TiO2-SiO2 and TiO2-ZrO2; 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 realize continuous production, is simple and convenient to operate in the reactionprocess, 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 isobutylene oligomerization, in particular to a method for heteropolyacid / titanium-based composite oxide as a catalyst to catalyze isobutylene oligomerization. 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 detergent, Impo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
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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