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Copper-based catalyst and preparation method thereof

A copper-based catalyst and catalyst technology, applied in chemical instruments and methods, heterogeneous catalyst chemical elements, physical/chemical process catalysts, etc., can solve poor stability, deactivation, methyl bromide conversion rate, low dimethyl ether selectivity, etc. problems, to achieve the effect of excellent performance, mild reaction conditions, simple and controllable operation

Active Publication Date: 2017-05-17
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the conversion rate of methyl bromide and the selectivity of dimethyl ether of this bulk catalyst are low, and the stability is poor, and it begins to deactivate within half an hour

Method used

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  • Copper-based catalyst and preparation method thereof
  • Copper-based catalyst and preparation method thereof
  • Copper-based catalyst and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0037] According to the ratio that isopropanol mass percentage is 4.1%, AEO-7 mass percentage is 0.8%, triethanolamine mass percentage is 1.5%, isopropanol, AEO-7, triethanolamine are added to deionized water, prepare solution; According to Cu The element accounts for 15.2% of the mass percentage of the catalyst, the Zr element accounts for 3.2% of the catalyst mass percentage, and the La element accounts for 1.5% of the catalyst mass percentage. Copper nitrate, zirconium oxychloride and lanthanum nitrate are added to the solution, stirred and dissolved to completely prepare The impregnation solution was obtained, and then impregnated with 10 g of alumina carrier in equal volume, aged at room temperature for 8 hours, and dried at 120° C. for 24 hours. The obtained material was placed in a tube furnace and heated to 130° C. under nitrogen, treated with 65% water vapor-35% nitrogen mixture for 2.5 hours, switched to nitrogen, and purged for 2 hours. Then the treated material was...

Embodiment 2

[0039] According to the ratio that isopropanol mass percentage is 2.5%, AEO-7 mass percentage is 1.9%, triethanolamine mass percentage is 0.6%, isopropanol, AEO-7, triethanolamine are added to deionized water, prepare solution; According to Cu The element accounted for 20.2% by mass of the catalyst, the Zr element accounted for 1.1% by mass of the catalyst, and the La element accounted for 0.8% by mass of the catalyst. Add copper nitrate, zirconium oxychloride and lanthanum nitrate to the solution, stir and dissolve to completely prepare The impregnation solution was obtained, and then impregnated with 10 g of alumina carrier in equal volume, aged at room temperature for 10 h, and dried at 80° C. for 48 h. The obtained material was placed in a tube furnace and heated to 145°C under nitrogen, treated with 55% water vapor-45% nitrogen mixture for 3 hours, switched to nitrogen, and purged for 2 hours. Then the treated material was calcined at 550° C. for 10 h; the catalyst was pr...

Embodiment 3

[0041] According to the ratio that isopropanol mass percentage is 4.8%, AEO-7 mass percentage is 1.7%, triethanolamine mass percentage is 1.1%, isopropanol, AEO-7, triethanolamine are added to deionized water, prepare solution; According to Cu The element accounts for 15.5% of the mass percentage of the catalyst, the Zr element accounts for 2.0% of the catalyst mass percentage, and the La element accounts for 2.5% of the catalyst mass percentage. Copper nitrate, zirconium oxychloride and lanthanum nitrate are added to the solution, stirred and dissolved to completely prepare The impregnation solution was obtained, and then impregnated with 10 g of alumina carrier in equal volume, aged at room temperature for 8 hours, and dried at 120° C. for 24 hours. The obtained material was placed in a tube furnace and heated to 130° C. under nitrogen, treated with 50% water vapor-50% nitrogen mixture for 4 hours, switched to nitrogen, and purged for 2 hours. Then the treated material was c...

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Abstract

The invention discloses a copper-based catalyst and a preparation method thereof. The catalyst has characteristic crystal faces of CuO, namely {110}, {111}, {202} and {113}, wherein when the crystal face with the maximum X-ray diffraction intensity is the standard, relative intensity of each crystal face is respectively as follows: I{110} / I{111} is 11-20; I{111} / I{111} is 80-88; I{202} / I{111} is 17-22; I{202} / I{111} is 7-9; and I{113} / I{111} is 11-14. The preparation method of the catalyst comprises the following steps: (1) preparing an aqueous solution containing alcohols, a surfactant and triethanolamine, and dissolving a copper precursor, a zirconium precursor and a lanthanum precursor into the solution; (2) carrying out equivalent-volume impregnation on a carrier by the use of the solution prepared in the step (1), aging and drying; (3) carrying out hydro-thermal treatment on a material prepared in the step (2); and (4) roasting the material obtained in the step (3) so as to prepare the catalyst. The copper-based catalyst prepared by the method can raise conversion rate of bromomethane and selectivity of dimethyl ether.

Description

technical field [0001] The invention relates to a copper-based catalyst and a preparation method thereof. Background technique [0002] Dimethyl ether is an important chemical raw material, and its main uses are: (1) Preparation of light olefins (DTO); (2) Synthesis of fine chemical products through carbonylation, alkylation, and oxidation reactions; (3) Can be used as Aerosol propellants, foaming agents, etc.; (4) instead of Freon as a refrigerant. Current research shows that dimethyl ether also has excellent combustion performance, and its liquefied properties are similar to liquefied petroleum gas; because its cetane number is higher than that of diesel, it can also be used as an ideal substitute for diesel. DME has low toxicity and low corrosivity, and is a clean fuel that can achieve high-efficiency combustion. It has broad application prospects in the fields of transportation, power generation, civil use, and gas. [0003] The current industrial production method of ...

Claims

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Application Information

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IPC IPC(8): B01J23/83C07C41/01C07C43/04
CPCB01J23/002B01J23/83B01J2523/00C07C41/01B01J2523/17B01J2523/3706B01J2523/48B01J2523/31C07C43/043
Inventor 张信伟李杰倪向前张舒冬孙晓丹
Owner CHINA PETROLEUM & CHEM CORP
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