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Isobutane dehydrogenation catalyst and preparation method thereof

A dehydrogenation catalyst, isobutane technology, applied in catalysts, carbon compound catalysts, chemical instruments and methods, etc., can solve the problems of poor stability and low activity of isobutane dehydrogenation catalysts

Active Publication Date: 2020-01-03
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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  • Isobutane dehydrogenation catalyst and preparation method thereof
  • Isobutane dehydrogenation catalyst and preparation method thereof
  • Isobutane dehydrogenation catalyst and preparation method thereof

Examples

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Effect test

Embodiment 1

[0024] Weigh 9.38g 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, and 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 0.186g of cerium nitrate and dissol...

Embodiment 2

[0026] Weigh 9.77g 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 0.186g of cerium nitrate and di...

Embodiment 3

[0028] Weigh 8.78g 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 0.186g of cerium nitrate and dissolve t...

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Abstract

The invention relates to an isobutane dehydrogenation catalyst and a preparation method thereof to mainly solve the problem that a dehydrogenation catalyst prepared in the prior art is low in activity and poor in stability. The isobutane dehydrogenation catalyst comprises the following components, by weight part, a) 0.1-5 parts of Pt or an oxide of Pt, b) 0.1-5 parts of rare earth metal or an oxide thereof, c) 0.1-5 parts of Sn or an oxide thereof, d) 0.1-10 parts of AB2O4 having the spinel structure, wherein A is selected from at least one of cations of divalent metals and B is selected from at least one of cations of trivalent metals, and e) 80-99 parts of a Al2O3 carrier. According to the technical scheme, the problem is well solved, and the preparation method can be used for industrial production of the catalyst for preparing isobutene from isobutene through dehydrogenation.

Description

technical field [0001] The invention relates to a catalyst for preparing isobutene from isobutane dehydrogenation and a preparation method thereof. Background technique [0002] In recent years, with the rapid development of petrochemical and polymer industries, the demand for olefins is increasing day by day. Among the abundant C4 resources in my country, oil field butane usually contains 20% to 40% isobutane, while the C4 fraction in my country The utilization rate is very low, except for a small amount for alkylation, most of them are used as fuel for direct consumption. 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, leading to more prominent contradictions of isobutylene resource shortage. Using isobutane as raw material to dehydrogenate iso...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/63B01J23/89B01J23/652C07C5/333C07C11/09
CPCB01J23/005B01J23/63B01J23/6522B01J23/8966B01J23/8993B01J2523/00C07C5/3332C07C2523/63C07C2523/652C07C2523/89B01J2523/828B01J2523/43B01J2523/3712B01J2523/27B01J2523/31B01J2523/842B01J2523/22B01J2523/36B01J2523/847B01J2523/67B01J2523/3706B01J2523/32B01J2523/3718B01J2523/28B01J2523/3725B01J2523/48B01J2523/47C07C11/09
Inventor 姜冬宇吴文海樊志贵曾铁强缪长喜
Owner CHINA PETROLEUM & CHEM CORP
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