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Method for producing hydrofluoroolefin

A technology of hydrofluoroolefins and manufacturing methods, which is applied in the field of hydrofluoroolefins manufacturing, can solve the problems of low global warming coefficient and easy decomposition by ultraviolet rays, and achieve the effect of excellent selectivity

Pending Publication Date: 2022-04-12
ASAHI GLASS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In particular, hydrofluoroolefins, which are known as one type of hydrofluorocarbons, contain carbon-carbon double bonds in their molecules, so they are easily decomposed by ultraviolet rays and have a low global warming coefficient

Method used

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  • Method for producing hydrofluoroolefin
  • Method for producing hydrofluoroolefin

Examples

Experimental program
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Effect test

Embodiment 1

[0175] [Pd 3 Preparation of Bi-supported silica 1]

[0176] Preparation of Pd by co-infiltration method 3 Bi supported silica 1. A specific preparation method will be described. In silica gel (Fuji Silysia Chemical Ltd., CARiACT G-6) as a carrier, with respect to 100 parts by mass of Pd 3 Nitric acid solutions of palladium nitrate and bismuth nitrate pentahydrate containing palladium and bismuth at an atomic ratio of 3 / 1 were added to Bi-supported silica 1 and the supported amount of palladium was 3 parts by mass, and stirred for 5 minutes to prepare a silica gel dispersion. After stirring, the silica gel dispersion was allowed to stand for 24 hours. Afterwards, dry at 110 °C, and then, under atmospheric pressure of H 2 The reduction treatment was performed by maintaining at 800° C. for 1 hour under air flow. Immediately after the reduction, the flow gas was switched to Ar gas, and naturally cooled to room temperature to obtain Pd 3 Bi supported silica 1(Pd 3 Bi / SiO 2...

Embodiment 2

[0181] [Pd 3 Preparation of In supported silica]

[0182] Preparation of Pd by successive impregnation method 3 In supported silica. A specific preparation method will be described. To the palladium-supported silica prepared by the above-mentioned method, an aqueous solution in which indium nitrate n-hydrate was dissolved was added in such a manner that the loading amount of palladium and indium became 3 / 1 in terms of atomic ratio, and stirred for 5 minutes to prepare palladium-supported silica. Silica dispersion. After stirring, the palladium-supported silica dispersion was left to stand for 24 hours. Afterwards, dry at 110 °C, and then, under atmospheric pressure of H 2 The reduction treatment was performed by maintaining at 800° C. for 1 hour under gas flow. Immediately after the reduction, the flow gas was switched to Ar gas, and naturally cooled to room temperature to obtain Pd 3 In supported silica (Pd 3 In / SiO 2 ).

Embodiment 3

[0184] [Pd 3 Preparation of Sn-loaded silica]

[0185] Preparation of Pd by successive impregnation method 3 Sn supported silica. A specific preparation method will be described. To the palladium-supported silica prepared by the above method, an ethanol solution in which tin chloride dihydrate was dissolved was added so that the supported amount of palladium and tin became 3 / 1 in atomic ratio, and stirred for 5 minutes to prepare palladium Loaded silica dispersion. After stirring, the palladium-supported silica dispersion was left to stand for 24 hours. Afterwards, dry at 110 °C, and then, under atmospheric pressure of H 2 The reduction treatment was performed by maintaining at 800° C. for 1 hour under gas flow. Immediately after the reduction, the flow gas was switched to Ar gas, and naturally cooled to room temperature to obtain Pd 3 Sn supported silica (Pd 3 Sn / SiO 2 ).

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Abstract

A method for producing a hydrofluoroolefin in which a chlorofluoroolefin having 8 or less carbon atoms represented by formula (I) or formula (II) is reacted with a hydrogen molecule in the presence of an intermetallic compound containing a first metal and a second metal different from the first metal. The first metal is at least one selected from the group consisting of palladium and the like, and at least one chlorine atom represented by Cl among the chlorine atoms contained in formula (I) or formula (II) is substituted by a hydrogen atom. In formula (I) or formula (II), R1-R10 each represents a hydrogen atom, a fluorine atom, a chlorine atom, or an alkyl group optionally substituted by a fluorine atom or a chlorine atom, and at least one fluorine atom is included in formula (I) or formula (II). And n represents an integer of 0-5.

Description

technical field [0001] The present disclosure relates to methods for the production of hydrofluoroolefins. Background technique [0002] Hydrofluorocarbons obtained by replacing chlorine atoms contained in chlorofluorocarbons with hydrogen atoms are useful as substitute compounds for chlorofluorocarbons used as refrigerants and solvents. [0003] In particular, hydrofluoroolefins, which are one type of hydrofluorocarbons, are known to contain carbon-carbon double bonds in their molecules, and thus are easily decomposed by ultraviolet rays, and have a low global warming coefficient. Therefore, there is a need for a method for efficiently producing hydrofluoroolefins from chlorofluoroolefins, which are one type of chlorofluorocarbons, while maintaining the carbon-carbon double bond. [0004] As a method for producing hydrofluoroolefins from chlorofluoroolefins, there is known a method of reacting a specific chlorofluoroolefin with hydrogen in the presence of a catalyst suppor...

Claims

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Application Information

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IPC IPC(8): C07C17/23C07C21/18B01J23/62B01J23/644
CPCC07C17/23B01J23/62C07B61/00B01J37/18B01J37/088B01J37/0201B01J23/6447B01J23/626B01J23/628C07C21/18B01J21/08
Inventor 小松隆之高山大鉴有山悟史山田拓
Owner ASAHI GLASS CO LTD
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