Process for producing wind electricity grade of bisphenol F epoxy resin

A technology of epoxy resin and wind power, which is applied in the field of preparation of wind power grade bisphenol F epoxy resin, can solve the problems of low para-isomer content, low product purity, and difficulty in control, and achieve simple synthesis method and high efficiency. Epoxy value, moisture reduction effect

Inactive Publication Date: 2009-05-13
XIANGTAN UNIV
View PDF10 Cites 14 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Chinese patent CN96115169.2 has reported the method of using phosphoric acid as a catalyst to synthesize bisphenol F in two steps. Although phenol and formaldehyde are close to the equivalent ratio and the reaction temperature is normal temperature, the yield is only 60-80%. The content of isomers is low, and the purity of the product is not high
In addition, both this patent and the patent JP05202165 use liquid caustic soda (concentration of 30-50%) t...

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

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Process for producing wind electricity grade of bisphenol F epoxy resin
  • Process for producing wind electricity grade of bisphenol F epoxy resin
  • Process for producing wind electricity grade of bisphenol F epoxy resin

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031]Step 1: Add 188.5g of raw material phenol and 35g of methanol into a 1000mL three-necked flask equipped with an electric stirrer, a thermometer and a reflux condenser, heat in a water bath, and after the phenol is fully melted, add 76.5g of phosphoric acid with a mass fraction of 85% , water 32g, and through strong stirring, the system is mixed evenly, and then 32.5g of formaldehyde solution with a mass fraction of 37% is added dropwise at a certain speed, and the stirring speed is fixed. Reduce the stirring speed by half, stop after 30 minutes, then separate the inorganic phase and the organic phase (bisphenol F isomer mixture), most of the phosphoric acid is recovered in the form of 70% aqueous solution, and can be used as a catalyst after concentration, and the organic phase Use solid sodium bicarbonate to neutralize to a pH value of about 5.0, and the generated carbon dioxide is discharged into the atmosphere, and the sodium phosphate precipitate is removed by filtrat...

Embodiment 2

[0037] Step 1: Add 188.5g of raw material phenol and 50g of methanol into a 1000mL three-neck flask equipped with an electric stirrer, a thermometer and a reflux condenser, heat in a water bath, and after the phenol is fully melted, add 76.5g of phosphoric acid with a mass fraction of 85% , 35g of water, and through strong stirring, the system is mixed evenly, and then 40.6g of formaldehyde solution with a mass fraction of 37% is added dropwise at a certain speed, and the stirring speed is fixed. Reduce the stirring speed by half, stop after 30 minutes, then separate the inorganic phase and the organic phase (bisphenol F isomer mixture), most of the phosphoric acid is recovered in the form of 70% aqueous solution, and can be used as a catalyst after concentration, and the organic phase Use solid sodium bicarbonate to neutralize to a pH value of about 5.0, and the generated carbon dioxide is discharged into the atmosphere, and the sodium phosphate precipitate is removed by filtr...

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
Viscosityaaaaaaaaaa
Epoxy equivalentaaaaaaaaaa
Viscosityaaaaaaaaaa
Login to view more

Abstract

The invention provides a comprehensive preparation technology for preparing bisphenol F with high para isomeride content first and then preparing wind-power bisphenol F epoxy resin with high epoxide number and low viscosity through the bisphenol F. The comprehensive preparation technology is as follows: formaldehyde and phenol are taken as raw materials, subjected to phenol formaldehyde condensation in a methanol solvent by adoption of a phosphoric acid as catalyst, and subjected to toluene recrystallization and freezing to obtain the bisphenol F with high para 4, 4'-isomer content; the bisphenol F and epichlorohydrin are taken as raw materials, added with dichlorohydrin, and subjected to ring-opening addition etherification reaction in the presence of catalyst hyamine benzyltrim-ethy-lammonium chloride, so as to generate a bisphenol F dichloro-alcohol ether intermediate; the bisphenol F dichloro-alcohol ether intermediate is added with solid alkali in batch, subjected to primary ring-closure epoxidation dechlorination reaction, and added with adequate diluted liquid alkali and adequate toluene solvent for secondary ring-closure epoxidation dechlorination reaction after separation of superfluous epichlorohydrin; and the bisphenol F dichloro-alcohol ether intermediate is subjected to crystallization of the toluene solvent, hot-water washing, vacuum drying and so on to obtain the bisphenol F epoxy resin product with high epoxide number and low viscosity.

Description

technical field [0001] The invention relates to a preparation method of wind power grade bisphenol F epoxy resin. The whole process is divided into four stages: (1) preparation of bisphenol F; (2) refining of bisphenol F; (2) preparation of bisphenol F resin; (3) Refined bisphenol F resin. technical background [0002] Wind power generation has the advantages of utilizing and transforming natural wind energy, not polluting the environment, and being flexible to use. It is an energy project encouraged and urgently needed by the state. Composite wind turbine blades are one of the key components of wind turbines. Megawatt-level blades need to consume a lot of raw materials such as epoxy resin, glass fiber, PVC, and coatings. The price of the blades accounts for about 25% of the generator set. Wind turbine blades work in the open air and have to withstand the test of natural weather and severe climate. Therefore, they have very high requirements in terms of weather resistance (...

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): C08G59/06
Inventor 刘跃进廖勇勇彭艳枚李胜国刘杰陈少华
Owner XIANGTAN UNIV
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