Method for preparing 1,2-diol compound by using catalytic hydration of epoxide

A technology of diol compounds and epoxides, applied in hydrolysis preparation, ether preparation, organic chemistry and other directions, can solve the problems of increasing the cost of product post-processing, large amount of fluoroboric acid, reducing selectivity, etc. High rate and good recycling effect

Active Publication Date: 2010-05-12
昌德新材科技股份有限公司
View PDF3 Cites 12 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method needs to use a large amount of methanol as a solvent, and methanol will compete with water to reduce selectivity; and methanol is highly toxic and must be handled with caution; moreover, since methanol needs to be recovered, this will increase the cost of product post-processing; , due to the addition of a large amount of methanol, compared with strong acids such as sulfuric acid, the amount of fluoboric acid used is too large

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

[0019] Take 48 mol of water and 0.001 mol of fluoboric acid into the reactor, set the temperature at 12°C, and start stirring; add 1.0 mol of ethylene oxide into the reactor, add it in about 45 minutes, and react at the same temperature for another 45 minutes; The oil phase was rectified to obtain 54.0 g of 99.5% ethylene glycol, with a total yield of 86.7%. The aqueous phase of the reaction solution is recycled for the next reaction.

Embodiment 2

[0021] Using the water phase of Example 1, 1.0mol ethylene oxide was added under the same conditions as in Example 1 to react. The oil phase of the reaction solution was rectified to obtain 99.6% ethylene glycol 58.5g, and the calculated total yield was 94.0% The aqueous phase of the reaction solution can be recycled for the next reaction.

Embodiment 3

[0023] Take 20 mol of water and 0.0005 mol of fluoboric acid into the reactor, set the temperature at 20°C, and start stirring; add 1.0 mol of propylene oxide into the reactor, add it in about 15 minutes, and react for another 45 minutes at the same temperature; The oil phase was rectified to obtain 70.0 g of 99.7% propylene glycol, with a total yield of 91.8%. The aqueous phase of the reaction solution is recycled for the next reaction.

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

PropertyMeasurementUnit
epoxy valueaaaaaaaaaa
epoxy valueaaaaaaaaaa
Login to view more

Abstract

A method for preparing 1,2-diol compound by using catalytic hydration of epoxide comprises the following steps: adding water and fluoboric acid in a reactor, setting the temperature at 10-99 DEG C, and then adding epoxide in the reactor, wherein the total reaction time is 0.2-5h, and mole ratio of the epoxide, the water and the fluoboric acid is 1:1.5-35:0.00001-0.001. In the invention, the selectivity is high and the separation of the product is simple.

Description

technical field [0001] The invention relates to a method for preparing 1,2-diol compound by catalytic hydration of epoxide. Background technique [0002] 1,2-diol compounds, such as ethylene glycol, 1,2-propanediol, 1,2-butanediol, 1,2-cyclohexanediol, etc., are widely used in synthetic materials. The sources of 1,2-diol compounds are mainly obtained by catalytic hydration of corresponding epoxides. [0003] The hydration of existing epoxides is carried out under alkaline conditions, such as the "1,2-pentanediol production process hydration neutralization method" published in "Fine and Specialty Chemicals" (vol.12(22), 2004). Improvement", using calcium hydroxide and formic acid, hydration at a pH of around 11. Compared with the amount of strong acid and other catalysts, the amount of calcium hydroxide and formic acid used in this method is very large, resulting in high material consumption and a large amount of "three wastes" to be processed. [0004] There are also meta...

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
Patent Type & Authority Applications(China)
IPC IPC(8): C07C29/10C07C31/20C07C35/37C07C35/14C07C41/46C07C43/196C07C43/13C08G59/14
CPCY02P20/52
Inventor 屈铠甲夏立锋蒋卫和
Owner 昌德新材科技股份有限公司
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