Method of continuous catalytic synthesis of 1-alkoxyl-1,1,2,2-tetrafluoroethane in fixed bed

A technology of tetrafluoroethane and fixed bed, which is applied in the field of continuous catalytic synthesis of 1-alkoxy-1,1,2,2-tetrafluoroethane in a fixed bed, which can solve the difficulty of large-scale industrial production and the difficulty of catalyst separation , Catalyst recovery difficulties and other problems, to achieve the effect of easy industrial production, large production scale, and improved affinity

Active Publication Date: 2014-05-07
JUHUA GROUP TECH CENT
View PDF4 Cites 7 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The above patents and literature technologies use alkali metal compounds as catalysts. The catalysts are difficult to recover, the slag content is high, the product and the catalyst are dif

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

[0028] A method for the continuous catalytic synthesis of 1-methoxy-1,1,2,2-tetrafluoroethane in a fixed bed, comprising the following steps:

[0029] (1) Preparation of strong basic solid catalyst with multifunctional groups

[0030] Weigh quantitative chloromethylated polystyrene spheres ( Anhui Samsung Resin Technology Co., Ltd. Production) into the reactor, and then add trimethylamine and 1,1,1-trifluoroisopropylamine. Among them, the mass ratio of chloromethylated polystyrene spheres, trimethylamine and 1,1,1-trifluoroisopropylamine is 100:35:14, the temperature is raised to 40°C, the reaction is kept for 12 hours, the reaction is completed, and the material is washed and discharged , to obtain a strong basic solid catalyst with a multifunctional group. The content of fluorine-containing aliphatic amine groups in the strongly basic solid catalyst with multifunctional groups is 18% of the mole (mol) number of -OH groups.

[0031] (2) Continuous catalytic synthesis reac...

Embodiment 2

[0035] A method for the continuous catalytic synthesis of 1-methoxy-1,1,2,2-tetrafluoroethane in a fixed bed, comprising the following steps:

[0036] (1) Preparation of strong basic solid catalyst with multifunctional groups

[0037] Weigh quantitative chloromethylated polystyrene spheres ( Shanghai Puzhen Biotechnology Co., Ltd. Production) into the reactor, and then add trimethylamine and 1,1,1-trifluoroisopropylamine. Among them, the mass ratio of chloromethylated polystyrene spheres, trimethylamine and 1,1,1-trifluoroisopropylamine is 100:50:5, the temperature is raised to 30°C, and the reaction is kept for 20 hours. Material, obtain the strong basic solid catalyst of multifunctional group. The content of fluorine-containing aliphatic amine groups in the strong basic solid catalyst with multifunctional groups is 7% of the mole (mol) number of -OH groups

[0038] (2) Continuous catalytic synthesis reaction

[0039] An isothermal fixed-bed reactor is used for the react...

Embodiment 3

[0042] A method for the continuous catalytic synthesis of 1-methoxy-1,1,2,2-tetrafluoroethane in a fixed bed, comprising the following steps:

[0043] (1) Preparation of strong basic solid catalyst with multifunctional groups

[0044] Weigh quantitative chloromethylated polystyrene spheres ( Shanghai Puzhen Biotechnology Co., Ltd. Production) into the reactor, and then add trimethylamine and 1,1,1-trifluoroisopropylamine. Among them, the mass ratio of chloromethylated polystyrene spheres, trimethylamine and 1,1,1-trifluoroisopropylamine is: 100:20:20, heat up to 50°C, keep warm for about 5 hours, finish the reaction, wash with water and put Material, obtain the strong basic solid catalyst of multifunctional group. The content of fluorine-containing aliphatic amine groups in the strongly basic solid catalyst with multifunctional groups is 25% of the mole (mol) number of -OH groups.

[0045] (2) Continuous catalytic synthesis reaction

[0046] An isothermal fixed-bed reacto...

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 method of continuous catalytic synthesis of 1-alkoxyl-1,1,2,2-tetrafluoroethane in a fixed bed. The method comprises the following steps: (1) carrying out a reaction on a chloromethylated polystyrene sphere, trimethylamine and fluorine-containing fatty amine in a weight ratio of 100:(20-50):(5-20), wherein the reaction temperature is 30-50 DEG C and the reaction time is 5-20 hours, and after reaction, obtaining a strongly basic solid catalyst with multifunctional groups; (2) filling tetrafluoroethylene and alcohol into the fixed bed of the catalyst obtained in the step (1) to react, wherein the reaction condition is that the alkene and alcohol ratio is 1-4, the air speed is 1-3/h, the reaction pressure is 0.1-0.8MPa and the reaction temperature is 20-60 DEG C, and collecting reaction products for gas-liquid separation to obtain a 1-alkoxyl-1, 1, 2, 2-tetrafluoroethane product. The method disclosed by the invention has the advantages of simple process, high yield, less three wastes and easiness in industrialization.

Description

technical field [0001] The invention relates to a production method of 1-alkoxy-1,1,2,2-tetrafluoroethane, in particular to a fixed-bed continuous catalytic synthesis of 1-alkoxy-1,1,2,2-tetrafluoroethane Methods. Background technique [0002] 1-Alkoxy-1,1,2,2-tetrafluoroethane has excellent properties such as low toxicity, low global warming potential and low greenhouse effect, compared with long carbon chain perfluoroalkyl compounds, It has fewer fluorine atoms, low price, and low long-term residual rate in the environment. It can be used as a refrigerant with excellent cleaning performance, foaming agent, cleaning agent, aerosol and waterproof drying solvent, and can also be used to produce polyurethane Foam or polyisocyanurate foam blowing agent, its performance is under development, the market prospect is promising. [0003] The preparation routes of hydrofluoroethers mainly include: hydroalkoxylation of unsaturated hydrocarbons and alcohols, and alkylation of acid fl...

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): C07C43/12C07C41/06B01J31/08
CPCB01J31/08B01J2231/32C07C41/06C07C43/12
Inventor 王金明
Owner JUHUA GROUP TECH CENT
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