Isobutane dehydrogenation catalyst and preparation method thereof and method for preparing isobutene from isobutane dehydrogenation

A technology of dehydrogenation catalyst and isobutane, which is applied in the direction of catalyst activation/preparation, catalyst, molecular sieve catalyst, etc., can solve the problems of uneven dispersion of noble metal active components, poor catalytic activity and stability, and poor effect of removing impurities. The effect of reducing the risk of carbon deposition, high membrane surface velocity, and reducing the cost of preparation

Active Publication Date: 2021-09-21
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] The purpose of the present invention is to overcome the complicated preparation process of the existing isobutane dehydrogenation catalytic catalyst, the preparation process is easy to cause environmental pollution, the effect of removing impurities is poor, and the energy consumption is high. In order to solve the defects of uneven dispersion, poor catalytic activity and stability, a method for preparing an isobutane dehydrogenation catalyst, an isobutane dehydrogenation catalyst prepared by the method and a method for preparing isobutene from isobutane dehydrogenation are provided, The method provided by the invention is easy to operate, low in energy consumption, environmentally friendly and low in cost, and the isobutane dehydrogenation catalyst prepared by the method can achieve better dehydrogenation under the condition that the load of precious metal is very low Activity, selectivity, stability and carbon deposition resistance

Method used

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  • Isobutane dehydrogenation catalyst and preparation method thereof and method for preparing isobutene from isobutane dehydrogenation
  • Isobutane dehydrogenation catalyst and preparation method thereof and method for preparing isobutene from isobutane dehydrogenation

Examples

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Effect test

Embodiment 1

[0068] This example is used to illustrate the isobutane dehydrogenation catalyst and its preparation method.

[0069] (1) Preparation of silica gel carrier

[0070] Water glass with a concentration of 15% by weight, sulfuric acid solution with a concentration of 12% by weight, n-butanol and glycerin are mixed in a weight ratio of 5:1:1:1 and contacted for 1.5 hours at 30°C. A pH adjustment of 3 for 98% by weight sulfuric acid gives the contact product A1. Pass the contact product A1 into a ceramic membrane filtration system and filter and wash with deionized water and ethanol until the content of sodium ions in the material is 0.02% by weight in terms of sodium element, and then collect the washing product B1 in the ceramic membrane filter tube, Get 30g of the washing product B1 and put it into a 100ml ball milling tank, wherein the material of the ball milling tank is polytetrafluoroethylene, the material of the grinding balls is agate, the diameter of the grinding balls is ...

Embodiment 2

[0094] This example is used to illustrate the isobutane dehydrogenation catalyst and its preparation method.

[0095] (1) Preparation of silica gel carrier

[0096]Water glass with a concentration of 15% by weight, sulfuric acid solution with a concentration of 12% by weight, n-butanol and glycerol are mixed in a weight ratio of 4:1:1:1 and contacted for 1.5h at 40°C. A pH adjustment of 2 for 98% by weight sulfuric acid gives contact product A2. Pass the contact product A2 into a ceramic membrane filtration system and filter and wash it with deionized water until the content of sodium ions in the material is 0.01% by weight in terms of sodium element, then collect the washing product B2 in the ceramic membrane filter tube and take 30g The washed product B2 is put into a 100ml ball mill jar, wherein the ball mill jar is made of polytetrafluoroethylene, the ball is made of agate, the diameter of the ball is 3mm, the number is 1, and the rotation speed is 400r / min. Close the ba...

Embodiment 3

[0105] This example is used to illustrate the isobutane dehydrogenation catalyst and its preparation method.

[0106] (1) Preparation of silica gel carrier

[0107] Water glass with a concentration of 15% by weight, sulfuric acid solution with a concentration of 12% by weight, n-butanol and glycerol are mixed in a weight ratio of 6:1:1:1 and contacted for 1.5 hours at 20°C. Adjustment of pH to 4 for 98% by weight sulfuric acid gives contact product A3. Pass the contact product A3 into a ceramic membrane filtration system and filter and wash with deionized water and ethanol until the content of sodium ions in the material is 0.03% by weight in terms of sodium element, and then collect the washing product B3 in the ceramic membrane filter tube, Get 30g of said washing product B3 and put it into a 100ml ball milling tank, wherein the material of the ball milling tank is polytetrafluoroethylene, the material of the grinding balls is agate, the diameter of the grinding balls is 3m...

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Abstract

The invention relates to the field of catalysts, and discloses an isobutane dehydrogenation catalyst, a preparation method thereof and a method for preparing isobutene from isobutane dehydrogenation. The method for preparing the isobutane dehydrogenation catalyst comprises: (a) contacting water glass, inorganic acid solution, n-butanol and glycerol, and then sequentially filtering and washing, ball milling, slurrying and spraying the obtained contact product Drying to obtain a silica gel carrier; (b) impregnating the silica gel carrier obtained in step (a) in a solution containing a Pt component precursor and a Zn component precursor, and then performing solvent removal and drying successively, wherein the step ( The filtering and washing described in a) is carried out in a ceramic membrane filter, and the content of sodium ions in the filtered and washed material in terms of sodium element is not higher than 0.2% by weight. The method has the advantages of simple operation, energy saving and environmental friendliness, and the obtained isobutane dehydrogenation catalyst can achieve better catalytic activity and stability under the condition that the loaded amount of noble metal is very low.

Description

technical field [0001] The invention relates to the field of catalysts, in particular to a method for preparing an isobutane dehydrogenation catalyst, an isobutane dehydrogenation catalyst prepared by the method and a method for preparing isobutene from isobutane dehydrogenation. 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-butanol (TAB ). [0003] In recent years, with the development and utilization of isobutene downstream products, the demand for isobutene has been in...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J29/03B01J35/00B01J35/02B01J35/10B01J37/02C07C11/09C07C5/333
CPCB01J29/0325B01J35/0066B01J35/023B01J35/1019B01J35/1047B01J35/1057B01J37/0201B01J2229/18C07C5/3337C07C2529/03C07C11/09
Inventor 亢宇刘红梅薛琳
Owner CHINA PETROLEUM & CHEM CORP
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