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Isobutane dehydrogenation catalyst with rodlike mesoporous molecular sieve silica gel composite material as supporter as well as preparation method and application thereof

A technology for dehydrogenation catalysts and mesoporous molecular sieves, applied in the direction of molecular sieve catalysts, including molecular sieve catalysts, carbon compound catalysts, etc., can solve problems such as unfavorable storage, transportation, post-processing and application, poor catalytic activity, and poor fluidity. Achieve the effect of simple preparation process, reduce preparation cost and improve selectivity

Inactive Publication Date: 2019-12-27
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to overcome the poor fluidity and easy agglomeration of existing rod-shaped ordered mesoporous materials, which is not conducive to its storage, transportation, subsequent processing and application, and thus leads to the preparation of existing rod-shaped ordered mesoporous materials. The supported isobutane dehydrogenation catalyst has defects such as poor catalytic activity, and provides an isobutane dehydrogenation catalyst whose carrier is a rod-shaped mesoporous molecular sieve silica gel composite material and its preparation method and isobutane dehydrogenation prepared by the method Catalyst and application of the isobutane dehydrogenation catalyst in isobutane dehydrogenation to isobutene

Method used

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  • Isobutane dehydrogenation catalyst with rodlike mesoporous molecular sieve silica gel composite material as supporter as well as preparation method and application thereof
  • Isobutane dehydrogenation catalyst with rodlike mesoporous molecular sieve silica gel composite material as supporter as well as preparation method and application thereof
  • Isobutane dehydrogenation catalyst with rodlike mesoporous molecular sieve silica gel composite material as supporter as well as preparation method and application thereof

Examples

Experimental program
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Embodiment approach

[0038] Preferably, in step (a), the mixing and contacting conditions include: a temperature of 25-60° C., a time of more than 25 minutes, and a pH of 1-6. In order to be more conducive to the uniform mixing of various substances, according to a preferred embodiment of the present invention, the mixing and contacting is carried out under stirring conditions.

[0039] In the present invention, in step (a), the amount of the template agent and the silicon source can be changed within a wide range, for example, the molar ratio of the template agent and the silicon source amount can be 1:10 -90; preferably 1:50-75.

[0040] In the present invention, in step (a), the selection of the template agent is preferably such that the obtained mesoporous material raw powder has a two-dimensional hexagonal pore distribution structure, and the pore volume of the mesoporous material raw powder is 0.8- 1.2mL / g, the specific surface area is 600-700m 2 / g, the average pore diameter is 5-10nm, pr...

preparation example 1

[0077] Preparation Example 1: Preparation of composite material F1 containing rod-shaped mesoporous molecular sieve C1 and silica gel A

[0078] (1) 4g (0.0007mol) of template agent P123 was added to a solution containing 37% by weight of hydrochloric acid (16.4mL) and water (128mL), stirred at 40°C until P123 was completely dissolved; then 8.86g (0.042mol) ) tetraethyl orthosilicate was added to the above solution, stirred at 40°C for 24h, then the obtained solution was transferred to a polytetrafluoroethylene-lined reactor, crystallized at 90°C for 24h, then filtered and used Washing with deionized water for 4 times, then performing suction filtration and drying to obtain the raw powder of mesoporous material; washing the raw powder of mesoporous material with ethanol under reflux conditions for 24 hours, removing the template agent, and obtaining rod-shaped mesoporous molecular sieve C1;

[0079] (2) At 25° C., 20 g of rod-shaped mesoporous molecular sieve C1 and 10 g of ES...

preparation example 2

[0086] Preparation Example 2: Preparation of composite material F2 containing rod-shaped mesoporous molecular sieve C2 and ES955 silica gel B

[0087] (1) Add 4g (0.0007mol) template agent P123 to a solution containing 37% by weight of hydrochloric acid (16.4mL) and water (128mL), and stir at 40°C until P123 is completely dissolved; then add 10.9g (0.0525mol ) was added to the above solution, stirred at 40°C for 24h, then transferred the obtained solution to a polytetrafluoroethylene-lined reactor, crystallized at 100°C for 20h, then filtered and used Washing with deionized water for 4 times, and then performing suction filtration and drying to obtain the raw powder of mesoporous material; washing the raw powder of mesoporous material with ethanol under reflux conditions for 24 hours, removing the template agent, and obtaining rod-shaped mesoporous molecular sieve C2;

[0088] (2) At 25° C., 30 g of rod-shaped mesoporous molecular sieve C2 and 10 g of ES955 silica gel B (see T...

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Abstract

The invention relates to the field of catalysts, and discloses an isobutane dehydrogenation catalyst with a rodlike mesoporous molecular sieve silica gel composite material as a supporter, a preparation method of the isobutane dehydrogenation catalyst, the isobutane dehydrogenation catalyst prepared by the method, and an application of the isobutane dehydrogenation catalyst in isobutene preparation by isobutane dehydrogenation. The method for preparing the isobutane dehydrogenation catalyst comprises the following steps: (a) preparing mesoporous material raw powder; (b) carrying out template agent removal treatment on the mesoporous material raw powder to obtain a rod-like mesoporous molecular sieve; (c) preparing a rodlike mesoporous molecular sieve silica gel composite material supporter; and (d) carrying out dipping treatment on the rod-like mesoporous molecular sieve silica gel composite material supporter in a solution containing a Pt component precursor and a Zn component precursor, and then sequentially carrying out solvent removal treatment, drying treatment and roasting treatment. The obtained isobutane dehydrogenation catalyst has good dehydrogenation activity and carbondeposition resistance.

Description

technical field [0001] The invention relates to the field of catalysts, in particular to an isobutane dehydrogenation catalyst whose carrier is a rod-shaped mesoporous molecular sieve silica gel composite material, a preparation method thereof, an isobutane dehydrogenation catalyst prepared by the method, and the isobutane dehydrogenation catalyst Application of hydrogen catalyst in isobutane dehydrogenation to isobutene. Background technique [0002] Isobutylene is a very important organic chemical raw material, mainly used in the preparation of methyl tert-butyl ether, butyl rubber, methyl ethyl ketone, polyisobutylene, methyl methacrylate, isoprene, tert-butylphenol, tert-butylamine, 1, Various organic raw materials and fine chemicals such as 4-butanediol and ABS resin. The main source of isobutene is the by-product C4 fraction of naphtha steam cracking ethylene unit, the by-product C4 fraction of refinery fluid catalytic cracking (FCC) unit and the by-product tert-butan...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/03B01J37/02B01J37/08B01J37/10B01J35/10B01J32/00C07C5/333C07C11/09
CPCB01J29/0325B01J37/0201B01J37/08B01J37/0018B01J37/10C07C5/333C07C2529/03B01J2229/18B01J35/617B01J35/638B01J35/635B01J35/67B01J35/647B01J35/615C07C11/09
Inventor 亢宇刘红梅刘东兵
Owner CHINA PETROLEUM & CHEM CORP
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