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Method for producing trans-1-chloro-3,3,3-trifluoropropene

A manufacturing method and technology of trifluoropropene, applied in chemical instruments and methods, preparation of halogenated hydrocarbons, preparation of dehydrohalogenation, etc., capable of solving heating and other problems

Active Publication Date: 2019-01-22
CENT GLASS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In Patent Document 2, 1233zd and / or 1,3,3,3-tetrafluoropropene (abbreviation: 1234ze) are produced from 240fa by gas-phase fluorination without a catalyst, but heating at high temperature for a long time is required

Method used

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  • Method for producing trans-1-chloro-3,3,3-trifluoropropene
  • Method for producing trans-1-chloro-3,3,3-trifluoropropene
  • Method for producing trans-1-chloro-3,3,3-trifluoropropene

Examples

Experimental program
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Effect test

preparation example 1

[0108] Introduce 4.1g / min of 1,1,1,3,3-pentachloropropane (240fa) and 3.4g / min of hydrogen fluoride ( Molar ratio: 240fa / hydrogen fluoride = about 1 / 9), and the autoclave was heated to 150°C. When the pressure exceeds about 4 MPa, the reaction product gas is discharged from the needle valve at the outlet of the condenser so as to maintain about 4 MPa. The exhausted gas was cooled in an ice water bath, and the acid was absorbed by a fluororesin gas cleaning bottle filled with ice water, and the reaction organic matter was recovered by passing through a glass trap of a dry ice acetone bath. When the liquid volume in the autoclave reached about 1000 ml, the reaction liquid was discharged from a dip tube through a needle valve so as to maintain about 1000 ml. The discharged reaction liquid was collected in a gas cleaning bottle made of fluororesin which was cooled in an ice-water bath and filled with ice water. After continuing the reaction for 24 hours, all the reaction liquid ...

Embodiment 1

[0112] The temperature was raised while flowing nitrogen gas at a rate of 10 ml / min through a cylindrical stainless steel (SUS316L) reaction tube with an inner diameter of 2.7 cm and a length of 40 cm equipped with an electric furnace. When the temperature of the reaction tube reached 320°C, as the reaction raw material, the vaporized reaction solution (halogenated hydrocarbon compound with 3 carbon atoms) was supplied at a flow rate of about 0.32 g / min, and the gasified reaction liquid (halogenated hydrocarbon compound with 3 carbon atoms) was supplied at a flow rate of about 0.12 g / min. Hydrogen fluoride is supplied at a flow rate of 0.8 ml / min, and chlorine gas is supplied at a flow rate of about 0.8 ml / min (molar ratio: halogenated hydrocarbon compound with 3 carbon atoms / hydrogen fluoride / chlorine gas=1 / 3.4 / 0.02, contact time: about 50 seconds) , when the flow is stable, stop the nitrogen supply. The generated gas flowing out of the reactor is passed through a fluororesin...

Embodiment 2

[0114] Regarding the supply amount of the reaction raw material, in addition to supplying the gasified reaction liquid (halogenated hydrocarbon compound with 3 carbon atoms) at a flow rate of about 0.47 g / min, hydrogen fluoride at a flow rate of about 0.10 g / min, In addition to supplying chlorine gas at a flow rate of about 0.8ml / min (molar ratio: halogenated hydrocarbon compound / hydrogen fluoride / chlorine gas with 3 carbon atoms=1 / 2.0 / 0.02, contact time: about 50 seconds), the same as in Example 1 The reaction was carried out in the same manner. The results are shown in Table 3.

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Abstract

The present invention provides a method for efficiently producing 1-chloro-3,3,3-trifluoropropene from a low-reactivity intermediate product. A method for producing trans-1-chloro-3,3,3-trifluoropropene is provided, which is characterized in that a halogenated hydrocarbon compound having 3 carbon atoms represented by the following general formula (1) is Reacts with hydrogen fluoride in the gas phase in the presence of chlorine, C 3 h X Cl Y f Z (1). In the formula, X is 2 or 3, when X=2, Y is an integer of 1 to 4, Z is an integer of 0 to 3, satisfying Y+Z=4; when X=3, Y is an integer of 1 to 5 Integer, Z is an integer of 0 to 4, satisfying Y+Z=5; wherein, the general formula (1) represents that the number of carbon atoms other than trans-1-chloro-3,3,3-trifluoropropene is 3 halogenated hydrocarbon compounds.

Description

technical field [0001] The present invention relates to a method for producing trans-1-chloro-3,3,3-trifluoropropene from a halogenated hydrocarbon compound having 3 carbon atoms. Background technique [0002] Trans-1-chloro-3,3,3-trifluoropropene (abbreviation: 1233zd(E)) is a next-generation polyurethane foaming agent, working fluid, refrigerant, etc. with low global warming potential (GWP). useful compound. [0003] Usually, 1-chloro-3,3,3-trifluoropropene (abbreviation: 1233zd) is fluorinated with hydrogen fluoride to 1,1,1,3,3-pentachloropropane (abbreviation: 240fa) using a fluorination catalyst Or it can be produced by fluorinating 1,1,3,3-tetrachloro-2-propene (referred to as: 1230za) with hydrogen fluoride. This fluorination can be carried out in a gas-phase or liquid-phase reaction, and usually, in the case of a liquid-phase reaction, it is carried out under pressurized conditions. [0004] For example, Patent Document 1 describes a method of reacting 1,1,1,3,3-...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C17/20C07C17/25C07C21/18
CPCC07C17/20C07C21/18C07C17/206C07C17/25
Inventor 冈本觉佐久冬彦金井正富北元崇胜
Owner CENT GLASS CO LTD