Method for synchronously preparing hydrofluoroether and fluorine-containing olefine ether

Abstract

The invention discloses a method for synchronously preparing hydrofluoroether and fluorine-containing olefine ether. The method for synchronously preparing the hydrofluoroether and the fluorine-containing olefine ether comprises the following steps of making fluorine-containing olefine react with alcohol in a solvent in the presence of a catalyst, and controlling reaction pressure to be 0.2MPa to 1.5MPa through regulating the introduction amount of the fluorine-containing olefine in a reaction process, wherein the molar ratio of the alcohol to the solvent to the catalyst is 1: (0.5 to 3): (0.1 to 1.5), and a reaction temperature is 50 DEG C to 150 DEG C; when the molar ratio of the introduction amount of the fluorine-containing olefine to the alcohol is (1.0 to 1.2): 1, terminating a reaction, and carrying out distillation separation to obtain products of the hydrofluoroether and the fluorine-containing olefine ether respectively. The method for synchronously preparing the hydrofluoroether and the fluorine-containing olefine ether has the advantages of being simple in technique, high in operating flexibility, low in cost, green and environmentally-friendly.

Description

technical field [0001] The invention relates to the technical field of fluorine fine chemical industry, in particular to a method for simultaneously preparing hydrofluoroether and fluorine-containing alkenyl ether. Background technique [0002] With the improvement of environmental protection requirements, the protection of the atmospheric ozone layer is increasingly strengthened. Deadlines for restricted use and phase-out of fluorotrichloromethane (R-11), difluorodichloromethane (R-11), difluorochloromethane (R-22) refrigerants, foaming agents, and fluorinated cleaning agents is approaching, there is an urgent need for environmentally friendly refrigerants, blowing agents and electronic cleaners that can protect the ozone layer. Fluorine-containing ethers, especially hydrofluoroethers and fluorine-containing alkenyl ethers, have zero ozone-depleting potential (ODP), low global warming potential (GWP) and short atmospheric residence time, and have little impact on the envir...

AI Technical Summary

Problems solved by technology

The disadvantage is that only a single product of hydrofluoroether can be obtained, the operation flexibility is small, and it cannot respond to market demand in time

The disadvantage is that only a single product of hydrofluoroether can be obtained, the operation flexibility is small, and the market demand cannot be responded to in a timely manner, and the boiling point of the solvent is high, and the recovery energy consumption and cost are high

No solvent or fluorine-containing catalyst is used in the reaction process. The disadvantage is that only a single product of hydrofluoroether can be obtained, the operation flexibility is small, the market demand cannot be responded to in time, and the production cost is high.