Process for synthesizing dibutyl carbonate

A technology of dibutyl carbonate and dimethyl carbonate, which is applied in the field of catalytic synthesis of dibutyl carbonate with supported catalysts, can solve the problems of low conversion rate of raw materials, production process, environmental pollution, toxicity, etc., and achieve high conversion rate of raw materials, Ease of separation and mild reaction conditions

Inactive Publication Date: 2005-01-26
NINGXIA UNIVERSITY
View PDF0 Cites 15 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Dialkyl carbonates are used in lithium-ion batteries because of their good electrochemical stability, high flash point and low melting point in the electrochemical field. Among them, dibutyl carbonate has a large Molecular weight, its flash point, oxidation resistance are improved, thereby the electrochemical stability of lithium-ion battery electrolyte and the safety of battery are also improved accordingly (Barker, Jeremy, et al, Carbonaceous electrode and compatible electrolyte [P], U S Patent, 5643 695, 1997; Zhuang Quanchao, Wu Shan, etc., Research on Organic Electrolyte for Lithium-ion Batteries, Vol. VII, No. 4, 2001), there are two main problems in the traditional synthesis method, one is that the method should be a reversible reaction , the conversion rate of

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] The present invention is a process for preparing dibutyl carbonate by using dimethyl carbonate and butanol as raw materials under heterogeneous catalytic reaction conditions. The reaction is carried out in a rotary evaporator, and 0.1mol of industrial grade dimethyl carbonate is used, which is chemically pure. Butanol 0.4mol, supported catalyst KOH / AC2.6g (6% of the raw material quality), wherein the KOH load is 30% of the activated carbon (AC) quality, the oil bath heating temperature is 373K, and the reaction time is 6 hours.

[0012] Since this reaction is a two-step reaction, and both are reversible reactions, the thermodynamic equilibrium constant is very small. In order to break the limitation of thermodynamic equilibrium and improve the conversion rate of raw materials and the selectivity of the target product, 50ml / min of N 2 Pass it into the reaction bottle, take the saturated vapor of methanol out of the reactor, and collect it through a cold trap. After the re...

Embodiment 2

[0014] Industrial grade dimethyl carbonate 0.1mol, chemically pure butanol 0.5mol, supported catalyst KOH / AC2.6g (6% of raw material quality), wherein KOH loading is 10% of activated carbon (AC) quality, oil bath heating The temperature was 363K, the reaction time was 5 hours, other conditions were the same as in Example 1, the conversion rate of dimethyl carbonate was 94.3%, and the selectivity of dibutyl carbonate was 43.26%.

Embodiment 3

[0016] Industrial grade dimethyl carbonate 0.1mol, chemically pure butanol 0.5mol, supported catalyst KOH / AC1.3g (3% of raw material quality), wherein KOH loading is 5% of activated carbon (AC) quality, oil bath heating The temperature was 363K, the reaction time was 5 hours, other conditions were the same as in Example 1, the conversion rate of dimethyl carbonate was 93.88%, and the selectivity of dibutyl carbonate was 38.27%.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses a process for synthesizing dibutyl carbonate through the catalysis of load type catalyst, wherein alkali metal hydroxide, alkali metal halides, alkali metal carbonates are loaded onto active aluminium oxide, activated charcoal, or molecular sieve carrier through vacuum dipping method, thus obtaining solid catalyst.

Description

technical field [0001] The invention relates to a method for catalytically synthesizing dibutyl carbonate with a supported catalyst. Background technique [0002] Dialkyl carbonates are used in lithium-ion batteries because of their good electrochemical stability, high flash point and low melting point in the electrochemical field. Among them, dibutyl carbonate has a large Molecular weight, its flash point, oxidation resistance are improved, thereby the electrochemical stability of lithium-ion battery electrolyte and the safety of battery are also improved accordingly (Barker, Jeremy, et al, Carbonaceous electrode and compatible electrolyte [P], U S Patent, 5643 695, 1997; Zhuang Quanchao, Wu Shan, etc., Research on Organic Electrolyte for Lithium-ion Batteries, Vol. VII, No. 4, 2001), there are two main problems in the traditional synthesis method, one is that the method should be a reversible reaction , the conversion rate of raw materials is low, and the other is that th...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): C07C68/06C07C69/96
Inventor 李永昕徐崇福陈兴权
Owner NINGXIA UNIVERSITY
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap