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Copper-based catalyst and preparation method and application thereof

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

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] According to the ratio that isopropanol mass percentage is 3.3%, AEO-7 mass percentage is 1.6%, triethanolamine mass percentage is 0.7%, isopropanol, AEO-7, triethanolamine are added to deionized water, prepare solution; According to Cu The element accounts for 20% of the mass percentage of the catalyst, and the Zr element accounts for 1.2% of the catalyst mass percentage. Add copper nitrate and zirconium oxychloride to the solution, stir and dissolve completely to obtain an impregnation solution, and then carry out an equal-volume reaction with 10g of alumina carrier. Dipping, aging at room temperature for 8 hours, and drying at 80°C for 48 hours. The obtained material was placed in a tube furnace and heated to 145°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 calcined at 550°C for 10h; the catalyst was prepared, and the XRD results were shown in figure 1 . ...

Embodiment 2

[0038] According to the ratio of 4.8% by mass percentage of isopropanol, 0.9% by mass percentage of AEO-7, and 1.8% by mass percentage of triethanolamine, isopropanol, AEO-7, and triethanolamine are added to deionized water to prepare a solution; The element accounted for 15% by mass of the catalyst, and the Zr element accounted for 3.5% by mass of the catalyst. Add copper nitrate and zirconium oxychloride to the solution, stir and dissolve completely to obtain an impregnating solution, and then carry out an equal-volume Dipping, aging at room temperature for 10 hours, and drying at 120°C for 24 hours. The obtained material was placed in a tube furnace and heated to 130° C. under nitrogen, treated with 60% water vapor-40% nitrogen mixture for 2.5 hours, switched to nitrogen, and purged for 2 hours. Then the treated material was calcined at 600°C for 8h; the catalyst was prepared, and the XRD results were shown in figure 1 . The most intense X-ray diffraction When the cryst...

Embodiment 3

[0040] According to the ratio that isopropanol mass percentage is 5%, AEO-7 mass percentage is 1.5%, triethanolamine mass percentage is 1.3%, isopropanol, AEO-7, triethanolamine are added to deionized water, prepare solution; According to Cu The element accounts for 15% of the mass percentage of the catalyst, and the Zr element accounts for 2.2% of the catalyst mass percentage. Add copper nitrate and zirconium oxychloride to the solution, stir and dissolve completely to obtain an impregnating solution, and then carry out an equal volume with 10g of alumina carrier. Dipping, aging at room temperature for 9 hours, and drying at 90°C for 40 hours. The obtained material was placed in a tube furnace and heated to 130° 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 700°C for 8h; the catalyst was prepared, and the XRD results were shown in figure 1 . The most i...

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Abstract

The invention discloses a copper-based catalyst and a preparation method and an application thereof. The catalyst has CuO characteristic crystal faces of {110}, {111} and {202}, wherein the crystal face with maximum X-ray diffraction intensity is taken as a reference, the relative intensity of each crystal face is 15-20, is 90-95, is 20-25, is 8-10, and is 12-15. The preparation method of the catalyst comprises the following steps: 1) preparing an aqueous solution containing alcohols, a surfactant and triethanolamine, dissolving a copper precursor and a zirconium precursor in the solution; 2) aging the carrier in the prepared solution with equal volume, and drying the material; 3) performing hydro-thermal processing on the prepared material in the step 2); and 4) roasting the prepared material in the step 3) to obtain the catalyst. The copper-based catalyst can increase the conversion rate of bromomethane and selectivity of dimethyl ether.

Description

technical field [0001] The invention relates to a copper-based catalyst and its preparation method and application. 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 ...

Claims

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Application Information

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IPC IPC(8): B01J23/72C07C43/04C07C41/01
Inventor 张信伟李杰倪向前张舒冬孙晓丹
Owner CHINA PETROLEUM & CHEM CORP
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