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Catalyst for isobutane dehydrogenation to isobutene

A technology for producing isobutylene and catalysts, which is applied in metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, chemical instruments and methods, etc., and can solve problems such as low activity and poor stability

Active Publication Date: 2020-02-04
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem 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 to isobutene
  • Catalyst for isobutane dehydrogenation to isobutene
  • Catalyst for isobutane dehydrogenation to isobutene

Examples

Experimental program
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Effect test

Embodiment 1

[0025] Weigh 9.31g 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, 0.295g of calcium nitrate and 0.207g of po...

Embodiment 2

[0027] Weigh 9.70g 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, 0.295g of calcium nitrate and 0.20...

Embodiment 3

[0029] Weigh 8.71g 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, 0.295g of calcium nitrate and 0.207g of po...

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Abstract

The invention relates to a catalyst for isobutane dehydrogenation production of isobutylene. 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 earth metal or an oxide thereof, c) 0.1 to 5 parts of Sn or an oxide thereof, d) 0.1 to 5 parts of an alkali metal or an oxide thereof, e) 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 f) 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. 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. The content of isobutane in the mixed C4 by-product of catalytic cracking unit is as high as 45.5%, and most enterprises directly sell isobutane as liquefied gas. With the continuous expansion of the scale of domestic oil refining units and catalytic cracking units, the production capacity of isobutane will be further increased in the future, and how to improve the economic benefits of isobutane has gradually become a hot spot in the utilization of C4 resources. Using isobutane as raw mate...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/60B01J23/89B01J23/652B01J23/62B01J23/63
Inventor 姜冬宇刘剑锋吴文海樊志贵缪长喜
Owner CHINA PETROLEUM & CHEM CORP
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