Flexible reaction device and method for trifluoroethanol/trifluoroethyl methacrylate

Abstract

The invention relates to a flexible reaction device and method for trifluoroethanol / trifluoroethyl methacrylate. The device comprises an R-133a metering tank, an R-133a metering pump, a raw material mixing kettle, a raw material ramming pump, a venturi ejector, a reactor, a reaction circulating pump, a filter, a distillation kettle, a distillation condenser, a receiving tank, a tail gas condenser,a kettle bottom ramming pump and the like. The venturi ejector is arranged at the upper end of the reactor, and a suction inlet of the venturi ejector is communicated with the side top of the reactorthrough a gas guide pipe to form a venturi ejection reactor and an ejection loop reaction system is formed. Flexible switching production can be achieved through the production device with the specific structure and connection relation, and the device has the advantages of being simple in process, high in reaction rate, high in product yield, stable in product quality, dual-purpose, higher in capacity utilization rate, lower in comprehensive cost and suitable for flexible industrial production of trifluoroethanol / trifluoroethyl methacrylate.

Description

technical field [0001] The invention belongs to the field of fluorine-containing fine chemicals, in particular to a flexible reaction device and method of trifluoroethanol / trifluoroethyl methacrylate. Background technique [0002] Trifluoroethanol is an important aliphatic fluorine-containing fine chemical, which is widely used in the fields of fluorine-containing medicines, pesticide synthesis, advanced solvents, dyes and energy. Its structure is: [0003] CF 3 CH 2 Oh [0004] There are many synthetic methods of trifluoroethanol, including trifluorochloroethane (R-133a) hydrolysis method, trifluoroethane oxidation method, trifluoroacetic acid (derivative) reduction method, trifluoroacetaldehyde (derivative) reduction method , Vinylidene fluoride oxidation and other processes. Among them, the R-133a hydrolysis method has the advantages of low raw material cost, safety and reliability. US2868846 uses water and dihydric alcohol as solvents to synthesize trifluoroethanol...

AI Technical Summary

Problems solved by technology

US2868846 uses water and dihydric alcohol as solvents to synthesize trifluoroethanol by reacting alkali metal acetate with R-133a at 225-300°C, 3.4-18MPa and pH 4-7; US4590310 at 223°C and 9MPa Under certain conditions, trifluoroethanol is synthesized by reacting an aqueous solution of R-133a and metal acetate, wherein the metal acetate is prepared by metal hydroxide, water and acetic acid. The problem of the above two methods is that the metal chloride in the reaction product It is difficult to separate from excess unreacted metal acetate or alkali metal salt catalyst, which will easily cause waste of raw materials and reduce revenue

Moreover, the stirring form and stirring equipment of the reaction mostly adopt traditional stirring reactors, which makes the reaction rate and product yield not very satisfactory.

In the prior art, there is a lack of a flexible device that can produce both trifluoroethanol and trifluoroethyl methacrylate. At the same time, there is a lack of equipment for optimizing the reaction form of material mixing to increase the reaction rate and product yield. and product quality, for this reason, propose the present invention

Images