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A kind of synthesis method of dialkyl-α, ω-alkylene dicarbonate and its application in carbon dioxide absorption

A technology of alkylene dicarbonate and butylene dicarbonate, which is applied in the direction of organic carbonate preparation, separation methods, chemical instruments and methods, etc., can solve the problems of non-environmental protection and low process efficiency, and achieve low cost and simplified Process, cost and environmental friendliness

Active Publication Date: 2021-12-07
CHENGDU ORGANIC CHEM CO LTD CHINESE ACAD OF SCI +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In view of the shortcomings of the existing dialkyl-α, ω-alkylene dicarbonate synthesis methods, such as low process efficiency and environmental protection

Method used

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  • A kind of synthesis method of dialkyl-α, ω-alkylene dicarbonate and its application in carbon dioxide absorption
  • A kind of synthesis method of dialkyl-α, ω-alkylene dicarbonate and its application in carbon dioxide absorption

Examples

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Effect test

Embodiment 1

[0028] Add 0.025 mol of 1,3-propanediol, 0.75 mol of dimethyl carbonate, and 0.17 mol of magnesium oxide catalyst into a two-necked flask connected with a condensing reflux tube and a thermometer. Under normal pressure, react at a temperature of 80°C for 4h. After the catalyst was separated by filtration, a reaction liquid containing dimethyl-1,3-propylene dicarbonate was obtained. The dimethyl-1,3-propylene dicarbonate reaction liquid is subjected to vacuum distillation to obtain the dimethyl-1,3-propylene dicarbonate product.

Embodiment 2

[0030] Carry out the synthesis of dimethyl-1,3-butylene dicarbonate by the method of Example 1, replace the dihydric alcohol with 1,3-butanediol. Catalyst replaced by MgO-K 2 O. The reaction temperature is 75°C, and the reaction time is 6h. Other conditions are the same.

Embodiment 3

[0032] Carry out the synthesis of diethyl-1,4-butylene dicarbonate by the method of Example 1, replace dihydric alcohol with 1,4-butanediol, dialkyl carbonate is diethyl carbonate. The catalyst is calcium carbonate. The reaction temperature is 90°C, and the reaction time is 2h. The other conditions are the same.

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Abstract

The invention belongs to the technical field of carbonate materials, and in particular relates to a synthesis method of dialkyl-α, ω-alkylene dicarbonate and its application in carbon dioxide absorption. The existing synthesis methods of dialkyl-α, ω-alkylene dicarbonates have disadvantages such as low process efficiency and environmental protection. The technical solution of the present invention is: mixing aliphatic dihydric alcohol, dialkyl carbonate and a solid base catalyst, and heating and reacting under normal pressure to obtain dialkyl-α, ω-alkylene dicarbonate. In addition, the present invention also provides a method for applying dialkyl-α,ω-alkylene dicarbonate to absorb carbon dioxide. The invention is suitable for industries such as medicine, cosmetics, spices, electrolyte, biomedicine and polymers.

Description

technical field [0001] The invention belongs to the technical field of carbonate materials, and in particular relates to a synthesis method of dialkyl-α, ω-alkylene dicarbonate and its application in carbon dioxide absorption. Background technique [0002] Dialkyl-α,ω-alkylene dicarbonates are non-toxic and non-polluting, and are mainly used in pharmaceuticals, cosmetics, fragrances, electrolytes, biomedicine and polymer industries. Its synthesis methods mainly include phosgene method, oxidative carbonylation method and transesterification method. The traditional phosgene method is gradually being phased out due to safety and environmental issues; the catalyst used in the oxidative carbonylation method is expensive and has low catalytic efficiency, which limits its industrial development; while the reaction conditions of the transesterification method are mild, the reaction process is simple, and no additional solvent is required , High product yield and low raw material po...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C68/06C07C69/96B01D53/14
CPCB01D53/1475B01D53/1493B01D2252/205C07C68/06C07C69/96Y02P20/151Y02C20/40
Inventor 陈彤石娅琴汤志刚王公应
Owner CHENGDU ORGANIC CHEM CO LTD CHINESE ACAD OF SCI