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A kind of quaternary platinum-based low-carbon alkane dehydrogenation catalyst and preparation method thereof

A technology for dehydrogenation catalysts and low-carbon alkanes, which is applied in the fields of hydrocarbons, hydrocarbons, chemical instruments and methods, etc., which can solve the problems of unsatisfactory catalyst activity and selectivity, not involving catalyst performance, and outstanding stability. and other problems, to achieve the effect of improving the high temperature regeneration stability, improving the single-pass conversion rate, and improving the ability to resist carbon deposition.

Active Publication Date: 2018-09-04
CHINA NAT OFFSHORE OIL CORP +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Although there have been a large number of research reports on the preparation of catalysts for the catalytic dehydrogenation of low-carbon alkanes, the activity and selectivity of the catalysts are generally not ideal, and the stability problem is also prominent, especially the existing reports do not involve catalysts. Catalyst performance after multiple regenerations

Method used

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  • A kind of quaternary platinum-based low-carbon alkane dehydrogenation catalyst and preparation method thereof
  • A kind of quaternary platinum-based low-carbon alkane dehydrogenation catalyst and preparation method thereof
  • A kind of quaternary platinum-based low-carbon alkane dehydrogenation catalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] (1) After mixing the 1M aluminum chloride solution with the 0.02M zirconium oxychloride and 0.013M cerium nitrate solution in a volume of 7:1, add ammonia water with a mass concentration of 10%, and put it in a neutralization tank at 70°C Mix evenly under low pressure, control the pH value to 8.0, filter, wash with water, and acidify, pressurize the oily ammonia column into balls, dry, age, and roast at 850°C for one hour to obtain alumina containing 0.5w% Zr and 0.5w% Ce small ball.

[0033] (2) Mix 1ml concentration of 0.2M chloroplatinic acid aqueous solution and 3.7ml concentration of 0.18M stannous chloride hydrochloric acid solution, and add hydrochloric acid and water to the above-mentioned Pt-Sn dipping solution according to the saturated water absorption of the carrier used The concentration of hydrochloric acid in the finally prepared dipping solution is 1.5M. Immerse the configured impregnating solution and the 13.33g carrier in (1) in equal volume for 12 ho...

Embodiment 2

[0037] (1) After mixing the 1M aluminum chloride solution with the 0.04M zirconium oxychloride and 0.013M cerium nitrate solution in a volume of 7:1, add ammonia water with a mass concentration of 10%, and put it in a neutralization tank at 70°C Mix evenly under low pressure, control the pH value to 8.0, filter, wash with water, and acidify, pressurize the oily ammonia column into balls, dry, age, and roast at 850°C for one hour to obtain alumina containing 1.0w% Zr and 0.5w% Ce small ball.

[0038] (2) 1ml concentration of 0.2M chloroplatinic acid aqueous solution and 3.7ml concentration are mixed evenly with the hydrochloric acid solution of 0.18M tin protochloride, according to the saturated water absorption of the carrier used, add hydrochloric acid hydrochloride and Water makes the concentration of hydrochloric acid in the final prepared impregnating solution 1.5M. Immerse the configured impregnating solution and 13.33g of the carrier in (1) in an equal volume for 12 hou...

Embodiment 3

[0042] (1) After mixing the 1M aluminum chloride solution with the 0.06M zirconium oxychloride and 0.013M cerium nitrate solution in a volume of 7:1, add ammonia water with a mass concentration of 10%, and put it in a neutralization tank at 70°C Mix evenly under low pressure, control the pH value to 8.0, filter, wash with water, and acidify, pressurize the oily ammonia column into balls, dry, age, and roast at 850°C for one hour to obtain alumina containing 1.0w% Zr and 0.5w% Ce small ball.

[0043] (2) Mix 1ml concentration of 0.2M chloroplatinic acid aqueous solution and 3.7ml concentration of 0.18M stannous chloride hydrochloric acid solution, and add hydrochloric acid and water to the above-mentioned Pt-Sn dipping solution according to the saturated water absorption of the carrier used The concentration of hydrochloric acid in the finally prepared dipping solution is 1.5M. Immerse the configured impregnating solution and the 13.33g carrier in (1) in equal volume for 12 ho...

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Abstract

The invention discloses a quaternary platinum-based light-alkane dehydrogenation catalyst and a preparation method thereof. The catalyst comprises four components: Pt, Sn, Zr, and Ce, wherein Zr and Ce are added in the preparation of a carrier small aluminium oxide ball, and Sn and the active component Pt are uniformly loaded on the carrier by adopting an impregnation method; based on the weight of the catalyst, the content of Al2O3 is 95.0%-98.0%, the content of Pt is 0.1%-1.0%, the content of Sn is 0.1%-2%, the content of Zr is 0.5%-3.0%, and the content of Ce is 0.5%-2%. The catalyst prepared by the invention has the good catalytic activity when being used in propane dehydrogenation reaction, the catalyst has no obvious activity reduction after multiple-time regeneration, the average conversion per pass of propane is 37% and more, the propylene selection is more than 90%, and the good regeneration stability can be shown.

Description

technical field [0001] The invention relates to the technical field of alkane catalytic dehydrogenation, in particular to a quaternary platinum-based catalyst whose active components are evenly distributed and which is suitable for producing propylene by catalytic dehydrogenation of propane or catalytic dehydrogenation of isobutane to produce isobutene and a preparation method thereof. Background technique [0002] Propylene is an important organic chemical raw material, and its main source is the by-products of traditional oil refining processes such as steam cracking and catalytic cracking. Therefore, the production of propylene is subject to the production of the main products ethylene and refined oil. The propylene output of the current traditional process cannot meet the market demand for propylene, and the market gradually pays attention to the new alternative production process of propylene, including propane dehydrogenation (PDH), methanol to olefins (MTO, MTP), deep ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/63C07C5/333C07C11/06
CPCY02P20/52
Inventor 孙彦民蔡奇王静徐振领吴同旭隋芝宇杨玉旺郭秋双
Owner CHINA NAT OFFSHORE OIL CORP
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