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Catalyst for isobutane dehydrogenation production of isobutylene and preparation method thereof

A dehydrogenation catalyst, a technology for producing isobutene, applied in chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, etc. lower problem

Active Publication Date: 2017-05-03
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] One of the technical problems to be solved by the present invention is the problem of low activity and poor stability of the isobutane dehydrogenation catalyst in the prior art, and a new catalyst for isobutane dehydrogenation is provided

Method used

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  • Catalyst for isobutane dehydrogenation production of isobutylene and preparation method thereof
  • Catalyst for isobutane dehydrogenation production of isobutylene and preparation method thereof
  • Catalyst for isobutane dehydrogenation production of isobutylene and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0024] Weigh 9.36g of alumina carrier and pour it into 200mL of deionized water and stir for 1 hour, weigh 1.637g of aluminum nitrate and 0.649g of zinc nitrate and dissolve them in 50mL of deionized water respectively, then mix the two evenly, pour alumina and water After continuing to stir for 1 hour, ammonia water was slowly added dropwise under continuous stirring until the pH was 8.5. Aging the product for 2 hours, filtering and washing with 2L of water to obtain a filter cake, drying the filter cake at 90°C for 16 hours, and then roasting it in a muffle furnace at 580°C for 20 hours to obtain ZnAl 2 o 4 -Al 2 o 3 carrier. Weigh 0.190g of stannous chloride and dissolve it in 10mL of hydrochloric acid solution, add it to the above-mentioned carrier under stirring, mix well, soak at 30°C for 12 hours, and then dry at 90°C for 16 hours to obtain the catalyst precursor, which is recorded as I. Weigh 0.159g of chloroplatinic acid and 0.207g of potassium nitrate and dissolv...

Embodiment 2

[0026] Weigh 9.75g of alumina carrier and pour it into 200mL of deionized water and stir for 1 hour, weigh 0.041g of aluminum nitrate and 0.017g of zinc nitrate and dissolve them in 50mL of deionized water respectively, then mix the two evenly, pour alumina and water After continuing to stir for 1 hour, ammonia water was slowly added dropwise under continuous stirring until the pH was 8.5. Aging the product for 2 hours, filtering and washing with 2L of water to obtain a filter cake, drying the filter cake at 90°C for 16 hours, and then roasting it in a muffle furnace at 580°C for 20 hours to obtain ZnAl 2 o 4 -Al 2 o 3 carrier. Weigh 0.295g of tin tetrachloride and dissolve it in 10mL of hydrochloric acid solution, add it to the above-mentioned carrier under stirring, mix evenly, impregnate at 10°C for 24 hours, and then dry at 90°C for 16 hours to obtain the catalyst precursor, which is recorded as I. Weigh 0.159g of chloroplatinic acid and 0.207g of potassium nitrate and...

Embodiment 3

[0028] Weigh 8.76g of alumina carrier and pour it into 200mL of deionized water and stir for 1 hour, weigh 4.093g of aluminum nitrate and 1.623g of zinc nitrate and dissolve them in 50mL of deionized water respectively, then mix the two evenly, pour alumina and water After continuing to stir for 1 hour, ammonia water was slowly added dropwise under continuous stirring until the pH was 8.5. Aging the product for 2 hours, filtering and washing with 2L of water to obtain a filter cake, drying the filter cake at 90°C for 16 hours, and then roasting it in a muffle furnace at 580°C for 20 hours to obtain ZnAl 2 o 4 -Al 2 o 3 carrier. Weigh 0.190g of stannous chloride and dissolve it in 10mL of hydrochloric acid solution, add it to the above-mentioned carrier under stirring, mix well, soak at 80°C for 1 hour, and then dry at 90°C for 16 hours to obtain the catalyst precursor, which is designated as I. Weigh 0.159g of chloroplatinic acid and 0.207g of potassium nitrate and dissolv...

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Abstract

The invention relates to a catalyst for isobutane dehydrogenation production of isobutylene and a preparation method thereof. The catalyst solves the problem that the dehydrogenation catalyst prepared by the prior art has low activity and poor stability. The catalyst provided by the invention comprises, by weight, a) 0.1 to 5 parts of Pt or an oxide thereof, b) 0.1 to 5 parts of an alkaline metal or an oxide thereof, c) 0.1 to 5 parts of Sn or an oxide thereof, d) 0.1 to 10 parts of AB2O4 having a spinel structure, wherein A represents at least one divalent metal cation and B represents at least one trivalent metal cation, and e) 80 to 99 parts of a carrier Al2O3. The catalyst well solves the problem and can be used for isobutane dehydrogenation industrial production of isobutylene.

Description

technical field [0001] The invention relates to a catalyst for isobutane dehydrogenation to produce isobutene and a preparation method thereof. Background technique [0002] Isobutylene is an important chemical raw material, mainly used to produce polyisobutylene, butyl rubber and methyl tert-butyl ether (MTBE). MTBE is a high-octane liquid that is often used to increase the octane number of gasoline Additives, the market demand is relatively large, which drives the development and utilization of MTBE upstream products. At present, the supply of isobutene in my country is in short supply, and the source is mainly the by-product C4 fraction of naphtha steam cracking ethylene plant and the by-product C4 fraction of refinery fluid catalytic cracking (FCC) unit. In my country, isobutane is not used for alkylation, but mostly as civil fuel, with low utilization value. Using isobutane as raw material to dehydrogenate isobutene can not only improve the utilization value of isobut...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/62B01J23/835B01J23/86C07C5/333C07C11/09
Inventor 姜冬宇吴文海吴省刘瑞丹缪长喜
Owner CHINA PETROLEUM & CHEM CORP
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