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Catalyst for preparing propylene by propane dehydrogenation and its prepn.

A propane dehydrogenation and catalyst technology, applied in the direction of catalyst carriers, chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, etc., can solve problems such as no application reports, achieve high propane conversion rate, improve Active, enhance the effect of anti-coking ability

Inactive Publication Date: 2007-08-15
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, this type of catalyst is still in the research stage, and there is no industrial application report

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0025] The preparation method of catalyst of the present invention is:

[0026] Step 1), impregnating the heat-resistant oxide with the rare earth metal aqueous solution at 60-100°C for 2-10 hours, suction filtering, washing with distilled water, drying at 60-180°C for 2-10 hours, and roasting at 400-600°C for 3-10 hours .

[0027] Step 2), co-immerse the carrier modified by the rare earth element metal and the aqueous solution containing the metal of the platinum group element and the metal of the group IVA element at 60-100°C for 2-10h, filter with suction, wash with distilled water, ℃ drying 2 ~ 10h.

[0028] Step 3), adding an inorganic oxide binder and an extrusion aid to the catalyst powder prepared above, and mixing uniformly. At the same time, add acidic peptizer dropwise and extrude into strips.

[0029] Step 4), drying the molded catalyst at 60° C. to 180° C. for 2 to 10 hours, and then activating it in air at 400 to 600° C. for 3 to 10 hours.

[0030] Step 5), r...

Embodiment 1

[0039] Will Al 2 o 3 impregnated La(NO 3 ) 3 After 3 hours of aqueous solution, suction filtration, washing with distilled water, and drying at 80°C for 3 hours, at 80°C, co-immerse in H 2 PtCl 6 and SnCl 4 The aqueous solution was filtered for 3 hours, washed with distilled water, dried at 120°C for 3 hours, calcined in air at 500°C for 4 hours, and reduced in hydrogen at 500°C for 8 hours to obtain the catalyst. The loading amount of each component in the catalyst is: Pt: 0.5wt%, Sn: 1wt%, La: 1.0wt%.

[0040] Evaluation conditions: catalyst mass 2.0g, propane mass space velocity 3.0h -1 , The reaction pressure is 0.1Mpa. The initial reaction temperature is 580°C, the reaction parameters are adjusted according to the actual reaction situation, and the final reaction temperature is 620°C. The pre-hydrogenation temperature of propane reaction gas is 150°C.

[0041] The results show that the catalyst has a propane conversion rate of 30.5% and a propylene selectivity of...

Embodiment 2

[0043] Ce(NO 3 ) 3 After 3 hours of aqueous solution, suction filtration, washing with distilled water, and drying at 80°C for 3 hours, at 80°C, co-immerse in H 2 PtCl 6 and SnCl 4 After 3 hours of aqueous solution, suction filtration, washing with distilled water, and drying at 120°C for 3 hours, adding 5wt% Al 2 o 3 Binder and 2wt% scallop powder, while adding 2wt% dilute HNO 3 Aqueous solution, extrusion molding. Then it was dried at 120°C for 3 hours, calcined in air at 500°C for 4 hours, and reduced in hydrogen at 500°C for 8 hours to obtain a catalyst. The loading amount of each component in the catalyst is: Pt: 0.5wt%, Sn: 1wt%, Ce: 1.2wt%.

[0044] Evaluation conditions: catalyst mass 2.0g, propane mass space velocity: 3.0h -1 , Reaction pressure: 0.1Mpa. The initial reaction temperature is 590°C, the reaction parameters are adjusted according to the actual reaction situation, and the final reaction temperature is 610°C. The pre-hydrogenation temperature of p...

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Abstract

The invention relates to a catalyst for dehydrogenating propane to prepare propone, which uses thermal-resistant oxide as carrier, uses palladium-group metal as main catalyst, uses IV A group metal and rare-earth metal as agents, uses halogen as modifier, and uses inorganic oxide with high temperature resistance as adhesive. The inventive catalyst under high temperature and low pressure has higher propane transfer rate, propone selectivity and reaction stability. And the preparation comprises that at 60-100Deg. C, immerging thermal-resistant oxide with rare-earth metal water solution for 2-10h, at 60-180Deg. C baking for 2-10h, at 400-600Deg. C baking for 3-10h, immerging said carrier and the water solution which contains palladium metal and IVA metal at 60-100Deg. C for 2-10h, and baking for 2-10h at 60-180Deg. C, adding adhesive, protruding agent and acid gel solvent, protruding and shaping, baking for 2-10h at 60-180Deg. C, activating for 3-10h at 400-600Deg. C, and reducing for 2-10h in hydrogen flow at 400-600Deg. C.

Description

technical field [0001] The invention relates to a catalyst for the reaction of propane dehydrogenation to propylene and a preparation method thereof, which is suitable for catalytic reactions and belongs to the catalyst preparation technology in the technical field of industrial catalysis. Background technique [0002] Propylene is an important organic chemical raw material, widely used in the preparation of polymer materials such as polypropylene and polyacrylonitrile. At present, the growth rate of my country's demand for propylene has surpassed that of ethylene, and the construction of new steam cracking units cannot meet the growing demand for propylene. It is necessary to accelerate the development of other alternative technologies, among which propane dehydrogenation to propylene is the most important due to its high selectivity. be watched. At present, there are several industrialized propane catalytic dehydrogenation technologies in the world, including UOP's Oleflex...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/63B01J27/135B01J32/00C07C5/333C07C11/06
CPCY02P20/52
Inventor 周钰明张一卫
Owner SOUTHEAST UNIV
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