Method for synthesizing diethyl carbonate and dibutyl carbonate

A technology of diethyl and butyl carbonate, which is applied in chemical instruments and methods, preparation of carbonate/haloformate, preparation of organic compounds, etc., can solve the problem of increasing the difficulty of reaction operation, insufficient catalyst activity, and dibutyl carbonate Problems such as low ester yield, to achieve the effect of easy scale-up and industrial application, high catalytic activity and reaction selectivity, and simple preparation process

Inactive Publication Date: 2011-06-15
LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

Although this patent has used a higher reaction temperature, the yield of dibutyl carbonate is still very low, which may be that the activity of the catalyst is not high enough; a more important problem is that this patent

Method used

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Examples

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Embodiment 1

[0022] Add 100 g of cerium nitrate into a 150 ml crucible, and then bake at 600° C. for 3 hours to prepare catalyst A.

Embodiment 2

[0024] Add 100 g of cadmium nitrate into a 150 ml crucible, and then bake at 500° C. for 3 hours to prepare catalyst B.

Embodiment 3

[0026] Add 100 g of lanthanum nitrate into a 150 ml crucible, and then bake at 500° C. for 3 hours to prepare catalyst C.

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Abstract

The invention discloses a method for synthesizing diethyl carbonate and dibutyl carbonate. A metal oxide is used as a catalyst, and carbon dioxide is used as an accelerant of reaction and an absorbent of ammonia; and in a reaction-separation system consisting of a tank reactor and a gas storage-condensation-ammonium carbamate catcher, ethyl carbamate or butyl carbamate and corresponding ethanol or butanol are catalytically reacted to obtain the corresponding diethyl carbonate or dibutyl carbonate respectively. The catalyst has high activity and selectivity, and is convenient for product separation and reuse.

Description

technical field [0001] The invention relates to a method for synthesizing diethyl and butyl carbonate. Background technique [0002] Diethyl carbonate and dibutyl carbonate are important intermediates and solvents for the synthesis of organic compounds (G S. Abbas, S. Swaminathan, Chem Rev. 96 (1996) 951-976). Specifically, diethyl carbonate (DEC) can be used as a solvent, used in vacuum tube cathode fixing paint, used as a surfactant and lithium battery fluid additive, etc. Electronic-grade pure DEC can be used as a cleaning agent for color TV picture tubes. The oxygen content of 40.6% of diethyl carbonate is much higher than that of methyl tert-butyl ether (MTBE) (18.2%). It can be used as an oxygen-containing additive for gasoline and diesel engine fuel to improve the combustion performance of gasoline and reduce the emission of pollutants. The United States and Western Europe have gradually restricted the use of MTBE. Among the possible alternatives, DEC's oil / water p...

Claims

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Application Information

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IPC IPC(8): B01J23/10B01J21/10C07C69/96B01J23/06C07C68/00
Inventor 邓友全马昱博石峰亓娟何昱德马祥元卢六斤
Owner LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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