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Carbon nanotube-graphene catalyst for synthesizing diethyl carbonate, and preparation method thereof

A technology of diethyl carbonate and carbon nanotubes, applied in the field of gas-phase catalytic synthesis of diethyl carbonate, can solve the problems of poor catalyst stability, equipment corrosion, low catalyst activity, etc., and achieve the effect of stable activity

Inactive Publication Date: 2015-03-11
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Activated carbon-supported chloride catalysts have chlorine loss, poor catalyst stability and equipment corrosion problems, while solid ion-exchange catalysts have low activity and unsatisfactory selectivity

Method used

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  • Carbon nanotube-graphene catalyst for synthesizing diethyl carbonate, and preparation method thereof
  • Carbon nanotube-graphene catalyst for synthesizing diethyl carbonate, and preparation method thereof
  • Carbon nanotube-graphene catalyst for synthesizing diethyl carbonate, and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0014] First, bake 2 g of dried graphite oxide in a muffle furnace at 900°C for 1 h to obtain expanded graphite; then dope copper on the expanded graphite, that is, immerse the expanded graphite in 40 ml of an aqueous solution of 1 mol / L ammonium carbonate. CuCl 2 Add 10ml of 0.5g aqueous solution dropwise into the above solution, stir, stand still, filter, dry, roast for 1 hour and grind into 2.3g of fine powder; finally put the above fine powder into a chemical vapor deposition furnace, pass through carbon The source gas was methane, and a composite of copper-doped carbon nanotubes and graphene was obtained by chemical vapor deposition, and then 3 g of copper-containing carbon nanotubes and graphene were added to 50 mL of PdCl 2 Immersed in methanol solution for 4h, rotary steamed and molded to obtain 3g of copper palladium carbon nanotube-graphene catalyst.

Embodiment 2

[0016] Under the situation that the preparation condition of catalyst is exactly the same as embodiment 1, only change the copper source in the preparation method into Cu(NO 3 ) 2 copper salt to obtain 3 g of catalyst.

Embodiment 3

[0018] Under the situation that the preparation condition of catalyzer is completely identical with embodiment 1, only change the copper source in the preparation method into Cu(CH 3 COO) 2 ·H 2 0 copper salt to obtain catalyst 3g.

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Abstract

The present invention discloses a carbon nanotube-graphene loaded copper palladium catalyst PdCl2 / Cu-nanotube-graphene for synthesizing diethyl carbonate through gas-phase carbonyl oxidation, wherein the carrier of the catalyst is a carbon nanotube-graphene composite material, the active component is any one selected from a divalent copper salt such as CuCl2, Cu(NO3)2, Cu(CH3COO)2 and CuSO4, the auxiliary agent of the catalyst is PdCl2, the copper doping amount is 0.1-2% of the carrier mass, and the palladium loading amount is 0.010-0.025% of the carrier mass. According to the invention, the prepared catalyst is used for the diethyl carbonate synthesis reaction through the gas-phase ethanol oxidation, the conversion rate of the target product diethyl carbonate is high, and the selectivity is good.

Description

technical field [0001] The invention relates to a carbon nanotube-graphene catalyst for synthesizing diethyl carbonate and a preparation method thereof, belonging to the gas phase catalytic synthesis technology of diethyl carbonate. Background technique [0002] Diethyl Carbonate (Diethyl Carbonate, referred to as DEC) is an important substance in carbonates and has a wide range of uses. Because its molecular structure contains ethyl, ethoxy, carbonyl and carboethoxy, its chemical properties are very active. It can react with alcohols, phenols, amines, esters and other compounds. It is an important intermediate in organic synthesis and has high industrial application value. When DEC is discharged into the environment, it can be slowly decomposed into two harmless products, carbon dioxide and ethanol, which are good green chemicals. DEC can be used as solvent, in vacuum tube cathode fixing paint, as surfactant and lithium battery liquid additive, etc. The oxygen value (40.6...

Claims

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Application Information

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IPC IPC(8): B01J27/13C07C68/00C07C69/96
Inventor 张萍波石敏范明明蒋平平
Owner JIANGNAN UNIV
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