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A kind of method for preparing rh-based catalyst and rh-based catalyst and application

A catalyst and promoter technology, applied in chemical instruments and methods, physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, etc. The effect of handling, safe and simple operation

Active Publication Date: 2018-04-06
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But so far, there has been no report on the use of organic ligands in the preparation of catalysts for the production of C2 and above oxygenates from syngas
This may be due to the fact that most organic ligands are relatively expensive and thus have not received much attention

Method used

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  • A kind of method for preparing rh-based catalyst and rh-based catalyst and application
  • A kind of method for preparing rh-based catalyst and rh-based catalyst and application
  • A kind of method for preparing rh-based catalyst and rh-based catalyst and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] (1) Preparation of catalyst

[0029] 0.154g RhCl 3 ·3H 2 O, 0.0756g MnCl 2 4H 2 O, 0.01726g LiCl·H 2 O and 0.024g urea are dissolved with 15ml deionized water, and the percentage composition corresponding to the carrier of each component is respectively 1.5wt%, 0.525wt%, 0.05wt% and 0.6wt%; Weigh 4g silica gel (20~40 orders) and added to the above impregnating solution, stirred at room temperature for 1 hour and left to dry; put the dried catalyst precursor in an oven at 100°C for 12 hours to further remove the moisture in the catalyst precursor; dry the The catalyst precursor was taken out and placed in a muffle furnace from room temperature to the roasting temperature at a heating rate of 3°C / min, and then roasted at a roasting temperature of 300°C for 3 hours; the roasted catalyst precursor was taken out and placed in In a tube furnace, the reduction is carried out under hydrogen, and the temperature is raised from room temperature to the reduction temperature a...

Embodiment 2

[0039] (1) Preparation of catalyst

[0040] 0.154g RhCl 3 ·3H 2 O, 0.0756g MnCl 2 4H 2 O and 0.016g urea were dissolved in 15ml of deionized water, and the percentages of each component corresponding to the carrier were 1.5wt%, 0.525wt% and 0.4wt% respectively; 4g of silica gel (20-40 mesh) was weighed and added to the above In the impregnating solution, stir at room temperature for 1 hour and let it dry in the air; put the dried catalyst precursor in an oven at 100°C for 12 hours to further remove the moisture in the catalyst precursor; put the dried catalyst precursor Take it out and put it in a muffle furnace for roasting at 300°C, the roasting time is 3 hours, and the heating rate is 3°C / min; take out the roasted catalyst precursor and put it in a tube furnace, and perform reduction under hydrogen at a reduction temperature of 350 ℃, the heating rate is 2℃ / min, the reduction time is 2h, and the hydrogen space velocity is 600ml·g -1 h -1 ; When the temperature in the ...

Embodiment 3

[0050] (1) Preparation of catalyst

[0051] 0.154g RhCl 3 ·3H 2 O, 0.0756g MnCl 2 4H 2 O, 0.01726g LiCl·H 2 O, 0.0233gIrCl 3 and 0.04g urea are dissolved with about 15ml of deionized water, and the percentages of each component corresponding to the carrier are respectively 1.5wt%, 0.525wt%, 0.05wt%, 0.375wt% and 1.0wt%; weigh 4g silica gel ( 20 to 40 mesh) and added to the above impregnating solution, stirred at room temperature for 1 hour and left to dry; put the dried catalyst precursor in an oven at 100°C for 12 hours to further remove the catalyst precursor Moisture; take out the dried catalyst precursor and put it in a muffle furnace for roasting at 300°C, the roasting time is 3h, and the heating rate is 3°C / min; take out the roasted catalyst precursor and put it in a tube furnace, The reduction is carried out under hydrogen, the reduction temperature is 350°C, the heating rate is 2°C / min, the reduction time is 2h, and the hydrogen space velocity is 600ml·g -1 h -...

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Abstract

The invention relates to a method for preparing an Rh-based catalyst, Rh-based catalyst and its application. Rh salt, additives, and urea are dissolved in a solvent to obtain an impregnating liquid; the carrier is immersed in the impregnating liquid, stirred for 1-2 hours, and placed in Dry it at room temperature, keep it in an oven at 100°C for 12h, roast it, and then reduce it with hydrogen to obtain a Rh-based catalyst. The Rh-based catalyst prepared by adding organic ligand urea has very high conversion rate of CO and selectivity of C2-C4 oxygenates, which makes this catalyst have good industrialization prospects.

Description

technical field [0001] The invention relates to a preparation method of an Rh-based catalyst improved by an organic ligand. The present invention also relates to the application of the above-mentioned catalyst in the hydrogenation of CO to produce C2-C4 oxygen-containing compounds. Background technique [0002] In recent years, worldwide demands to reduce dependence on petroleum have promoted the development of syngas chemistry. Syngas can be produced by converting coal, biomass and natural gas. Syngas can be converted into oil products (gasoline, diesel and solid paraffin), alcohol products, aldehyde products, ester products and other chemical products or intermediates. However, so far only syngas-to-oil and syngas-to-methanol processes have industrial scale. It is well known that the added value of C2 and above oxygenated compounds is much higher than that of methanol. C2 and above oxygen-containing compounds have a wide range of applications, and can be used as fuels,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/656C07C29/158C07C31/08C07C31/02C07C1/04
Inventor 丁云杰薛飞陈维苗
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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