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Catalyst for isobutane dehydrogenation to isobutene

A technology for preparing isobutene and catalysts, which is applied in metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, chemical elements of heterogeneous catalysts, etc. problem, to achieve the effect of good technical effect

Active Publication Date: 2020-09-04
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Catalyst K-Ce-Pt-Sn / γ-Al disclosed in Chinese patent (CN200910209534.4) 2 o 3 After 6 hours of reaction, the conversion rate of propane was 38%, the selectivity of propylene was 98%, and the amount of carbon deposition was less, the study did not provide stability data
When La is excessive, Pt aggregates and Sn also becomes metal, resulting in a decrease in catalyst activity
[0004] Isobutane dehydrogenation catalysts have made great progress, but there is still room for improvement in catalyst activity
The present invention adopts M1-M2-Al-O as the carrier to load Pt-Sn catalyst to improve the performance of the catalyst, and has good application prospect, but there is no relevant report yet

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
Comparison scheme
Effect test

Embodiment 1

[0031]Weigh 39.97g of beryllium chloride, 133.22g of chromium chloride, 24.52g of lanthanum chloride and 253.34g of soluble salt of aluminum chloride and dissolve them in 1L of deionized water, mix well, slowly drip ammonia water under continuous stirring, Adjust the pH value to 8.0, age the product for 2 hours, filter and wash with 4L of water to obtain a filter cake, dry the filter cake at 90°C for 16 hours, and roast it in a muffle furnace at 600°C for 20 hours to obtain Be 0.5 Cr 0.5 La 0.1 al 1.9 o x carrier. Weigh 9.85g of the carrier and put it into a beaker, then weigh 0.295g of tin tetrachloride and dissolve it in 10mL of hydrochloric acid solution, add the above-mentioned carrier while stirring, mix well, soak at 30°C for 12 hours, and then dry at 90°C for 16 hours. Obtain catalyst precursor, denoted as I. Weigh 0.133 chloroplatinic acid and dissolve it in 10mL water, add it into I under stirring, mix evenly, soak at 30°C for 12 hours, dry at 90°C for 16 hours, ...

Embodiment 2

[0033] Weigh 128.2g of magnesium nitrate, 200.08g of chromium nitrate, 32.49g of lanthanum nitrate and 712.75g of soluble salt of aluminum nitrate, dissolve them in 1L of deionized water, mix well, and slowly drip ammonia water under continuous stirring to adjust the pH value 8.0, the product was aged for 2 hours, filtered and washed with 4L of water to obtain a filter cake, dried at 90°C for 16 hours, and then roasted in a muffle furnace at 600°C for 20 hours to obtain Mg 0.5 Cr 0.5 La 0.1 al 1.9 o x carrier. Weigh 9.85g of the carrier and put it into a beaker, then weigh 0.190g of stannous chloride and dissolve it in 10mL of hydrochloric acid solution, add the above-mentioned carrier under stirring, mix well, soak at 30°C for 12 hours, and then dry at 90°C for 16 hours. Obtain catalyst precursor, denoted as I. Weigh 0.133 chloroplatinic acid and dissolve it in 10mL water, add it into I under stirring, mix evenly, soak at 30°C for 12 hours, dry at 90°C for 16 hours, and ...

Embodiment 3

[0035] Weigh 88.09g of calcium acetate, 200.08g of chromium nitrate, 31.60g of lanthanum acetate and 307.96g of basic aluminum acetate soluble salt, dissolve them in 1L of deionized water, mix well, and slowly drip ammonia water under continuous stirring to adjust the pH The value is 8.0, the product is aged for 2 hours, filtered and washed with 4L of water to obtain a filter cake, dried at 90°C for 16 hours, and then roasted in a muffle furnace at 600°C for 20 hours to obtain Ca 0.5 Cr 0.5 La 0.1 al 1.9 o x carrier. Weigh 9.85g of the carrier and put it into a beaker, then weigh 0.190g of stannous chloride and dissolve it in 10mL of hydrochloric acid solution, add the above-mentioned carrier under stirring, mix well, soak at 30°C for 12 hours, and then dry at 90°C for 16 hours. Obtain catalyst precursor, denoted as I. Weigh 0.133 chloroplatinic acid and dissolve it in 10mL water, add it into I under stirring, mix evenly, soak at 30°C for 12 hours, dry at 90°C for 16 hour...

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Abstract

The invention relates to a catalyst for preparing isobutene by isobutane dehydrogenation, and mainly solves the problem that the activity of a dehydrogenation catalyst prepared in the prior art is low. The composition catalyst is prepared from the following components in parts by weight: a) 0.1-5 parts of Pt or an oxide thereof; b) 0.1-5 parts of Sn or an oxide thereof; and c) 90-99 parts of a compound oxide M1-M2-Al-O carrier, M1 is selected from a mixture of IIA and VIB elements , M2 is selected from at least one of lanthanide elements, and the catalyst can well solve the problem that the activity of the dehydrogenation catalyst prepared in the prior art is low, and can be used for industrial production of the isobutene by isobutane dehydrogenation.

Description

technical field [0001] The invention relates to a catalyst for isobutane dehydrogenation to produce isobutene. Background technique [0002] Isobutene is generally produced as a by-product in refineries and chemical plants. Despite the development and promotion of MGG and catalytic cracking processes that produce more isobutene, the amount of by-product propylene and isobutene from refineries and chemical plants still cannot meet market demand, especially MTBE produced by etherification of isobutene as a low-pollution and high-efficiency Octane gasoline additives have become the fastest growing bulk chemical product in the world, and the demand for isobutylene is increasing day by day. Therefore, the production of isobutene by dehydrogenation of isobutane is favored in regions with abundant propane and isobutane resources. The industrialized dehydrogenation processes in the world include the STAR process of Philips Petroleum Company, the Catofin process of United Catalysis...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/652C07C5/333C07C11/09
CPCB01J23/002B01J23/6522B01J23/6525B01J2523/00C07C5/3332C07C11/09B01J2523/828B01J2523/43B01J2523/31B01J2523/67B01J2523/3706B01J2523/21B01J2523/22B01J2523/23B01J2523/24B01J2523/25B01J2523/68B01J2523/3712
Inventor 姜冬宇缪长喜吴文海樊志贵曾铁强
Owner CHINA PETROLEUM & CHEM CORP
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