Propane dehydrogenation catalyst and preparation method thereof

A propane dehydrogenation and catalyst technology, which is applied in the direction of catalyst activation/preparation, chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, etc., can solve the problem that the performance of the catalyst is not particularly ideal, the stability needs to be further improved, Low reaction selectivity and other problems, to achieve the effect of improving anti-carbon deposition ability, ensuring thermal stability, and high dehydrogenation activity

Active Publication Date: 2018-05-25
WANHUA CHEM GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In summary, although there have been a large number of research reports on the catalytic dehydrogenation of propane to propylene, the performance of the catalyst is generally not ideal, and there are still low reaction selectivity, serious carbon deposition, and further improvement in stability. The problem

Method used

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  • Propane dehydrogenation catalyst and preparation method thereof
  • Propane dehydrogenation catalyst and preparation method thereof
  • Propane dehydrogenation catalyst and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0031] Catalyst preparation

[0032] (1) Weigh 35.290g Al(NO 3 ) 3 9H 2 O (molecular weight: 375) and 0.439g Ca (NO 3 ) 2 (Molecular weight: 164) was dissolved in 100ml deionized water to form a solution, and stirred for 1h; the solution was heated to 50°C, neutralized with 5wt% sodium carbonate solution, and the pH was controlled to be 9; after filtering and washing with deionized water, use 12mol / L nitric acid solution was acidified to pH 6, stirred to a sol-like state, and the carrier slurry was obtained. The slurry was taken with a 5mL syringe, fitted with a needle, and the slurry was added dropwise to the oily ammonia column. The sol shrank into a spherical gel, and the small The particle size of the ball is 1.4-1.6 mm. After aging for 2 hours, the gel ball is taken out, washed with deionized water, dried at 120°C for 12 hours, and calcined at 500°C for 8 hours to obtain a composite oxide carrier ball;

[0033] (2) Weigh 0.019g SnCl 2 2H2 O (molecular weight: 226) ...

Embodiment 2

[0038] Catalyst preparation

[0039] (1) Weigh 35.560g Al(NO 3 ) 3 9H 2 O and 0.366g Ca(NO 3 ) 2 Dissolve in 100ml deionized water to form a solution, and stir for 2 hours; heat the solution to 40°C, neutralize with 4wt% sodium carbonate solution, and control the pH to 9; filter and wash with deionized water, use 14mol / L nitric acid solution Acidify to pH 6, stir until it is in the form of a sol to obtain a carrier slurry, use a 5mL syringe to take the slurry, install a needle, add the slurry dropwise to the oily ammonia column, the sol shrinks into a spherical gel, and the particle size of the pellet is controlled to be 1.4 ~1.6mm, after aging for 2 hours, the gel beads were taken out, washed with deionized water, dried at 100°C for 24 hours, and calcined at 600°C for 6 hours to obtain composite oxide carrier beads;

[0040] (2) Weigh 0.029g SnCl 2 2H 2 O and 0.023g BiCl 3 Dissolve in 10.0ml of hydrochloric acid solution with a concentration of 1.0mol / L, make a soluti...

Embodiment 3

[0045] Catalyst preparation

[0046] (1) Weigh 35.330g Al(NO 3 ) 3 9H 2 O and 0.366g Ca(NO 3 ) 2 Dissolve in 100ml deionized water to form a solution, and stir for 1 hour; heat the solution to 60°C, neutralize with 6wt% sodium carbonate solution, and control the pH to 10; filter and wash with deionized water, use 11mol / L nitric acid solution Acidify to pH 6, stir until it is in the form of a sol to obtain a carrier slurry, use a 5mL syringe to take the slurry, install a needle, add the slurry dropwise to the oily ammonia column, the sol shrinks into a spherical gel, and the particle size of the pellet is controlled to be 1.4 ~1.6mm, after aging for 1 hour, take out the gel beads, wash with deionized water, dry at 150°C for 18 hours, and bake at 700°C for 8 hours to obtain composite oxide carrier beads;

[0047] (2) Weigh 0.019g SnCl 2 2H 2 O and 0.060 g BiCl 3 Dissolve in 10.0ml of hydrochloric acid solution with a concentration of 0.5mol / L, make a solution and stir ev...

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Abstract

The invention discloses a propane dehydrogenation catalyst and a preparation method thereof. The propane dehydrogenation catalyst adopts CaO-Al2O3 composite oxide balls as a carrier, adopts metal Pt as an active component, and adopts Sn and Bi as additives; by adoption of the mass of the catalyst as a reference, the content of the metal Pt is 0.1-1.0wt%, the content of the Sn is 0.1-2.0wt%, the content of the Bi is 0.1-1.0wt%, the content of CaO is 1.0-5.0wt% and the rest is Al2O3. The propane dehydrogenation catalyst and the preparation method disclosed by the invention have the beneficial effects that the catalyst is prepared by adopting a coprecipitation process and can ensure heat stability and enough specific surface area and pore volume of catalyst carriers; the reaction property andanti-carbon-deposition capability of the catalyst are excellent; the dehydrogenation activity of the catalyst is very high under a high-temperature condition, the propylene selectivity can reach 90%or more, and the stability is good.

Description

technical field [0001] The invention relates to a propane dehydrogenation catalyst and a preparation method thereof, in particular to a platinum series catalyst loaded on a composite oxide carrier and a preparation method thereof, and its application in propane dehydrogenation to propylene. Background technique [0002] Propylene is the earliest petrochemical raw material used, and it is also one of the important olefins in the production of petrochemical products. It is mainly used in the production of chemical products such as polypropylene, acrylonitrile, propylene oxide, acrylic acid, acrolein, phenol and butanooctanol. At present, propylene mainly comes from petroleum cracking to produce ethylene and the by-products of petroleum catalytic cracking. Due to the high energy consumption, low selectivity of traditional processes, and the shortage of petroleum resources, people are looking for more economical and efficient production methods for low-alkene such as propylene. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/644B01J35/08B01J37/18C07C5/333C07C11/06
CPCB01J23/6447B01J35/08B01J37/18B01J2231/766C07C5/325C07C11/06Y02P20/52
Inventor 蒋锋孔祥明冯培广李江常林张宏科华卫琦
Owner WANHUA CHEM GRP CO LTD
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