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Preparation method of HFC-365mfc and HFC-245fa

A technology of hfc-245fa, cf3ch2-ccl2-ch3, applied in chemical instruments and methods, halogenated hydrocarbon preparation, halogen substitution preparation, etc., can solve problems such as unpublished methods, achieve high selectivity, excellent environmental protection performance, conversion high rate effect

Active Publication Date: 2020-11-03
ZHEJIANG RES INST OF CHEM IND CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0015] At present, the method for preparing HFC-365mfc or HFC-245fa from trifluoromethane has not been disclosed in the prior art

Method used

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  • Preparation method of HFC-365mfc and HFC-245fa
  • Preparation method of HFC-365mfc and HFC-245fa

Examples

Experimental program
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Effect test

preparation example 1

[0063] Preparation of catalyst used in step (2) of the present invention.

[0064] Ni(NO 3 ) 2 ·6H 2 O, Rh (NO 3 ) 3 2H 2 O and Mn(NO 3 ) 2 ·6H 2 O, dissolved in 500ml of water, take 25% ammonia solution and add it dropwise to the above solution, control the pH value to 9, and at the same time turn on the magnetic stirring, centrifuge and dry, remove the lower layer of precipitate, dry at 120°C and bake at 450°C for 6h under nitrogen atmosphere Obtain nickel-rhodium-manganese composite catalyst, wherein the molar ratio of nickel, rhodium, and manganese is 1:0.5:0.15.

preparation example 2

[0066] Prepare the catalyst used in step (2) according to the method of Preparation Example 1, the difference is that Zn(NO 3 ) 2 ·6H 2 O instead of Mn(NO 3 ) 2 ·6H 2 O, the nickel-rhodium-zinc composite catalyst is prepared, wherein the mol ratio of nickel, rhodium, and zinc is 1:0.5:0.15.

preparation example 3

[0068] The catalyst used in step (2) was prepared according to the method of Preparation Example 1, except that the molar ratio of the prepared nickel, rhodium, and manganese was 1:1:0.8.

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Abstract

The invention provides a preparation method of HFC-365mfc and HFC-245fa, which comprises the following steps: reacting trifluoromethane with chlorine to obtain CF3Cl, reacting CF3Cl with 2-chloropropene under the action of a catalyst to obtain CF3CH2CCl2CH3, and carrying out fluorination reaction on CF3CH2CCl2CH3 to obtain the HFC365mfc; then reacting CF3Cl with vinyl chloride or vinyl fluoride toprepare CF3CH2CHCl2 or CF3CH2CHFCl, and then carrying out a fluorination reaction to obtain HFC245fa. A catalyst used in the method is high in activity, long in service life, high in raw material conversion rate and high in product selectivity of HFC365mfc and HFC245fa; the raw material trifluoromethane is a by-product in R22 industrial production, and resource utilization of trifluoromethane iswell achieved.

Description

technical field [0001] The invention belongs to the field of fluorine chemical industry and relates to a preparation method of hydrofluorocarbons, in particular to a preparation method of HFC-365mfc and HFC-245fa. Background technique [0002] HFC-23 (CHF3, trifluoromethane, R23), is HCFC-22 (CHClF 2 , Chlorodifluoromethane, R22) is an inevitable by-product in the industrial production process, has a strong greenhouse effect, and its GWP value is as high as 14,800. It has been controlled internationally and is used as a carbon trading object. In general industry, trifluoromethane is treated by incineration, and it is completely decomposed into hydrogen fluoride, carbon dioxide and other substances by calcining. However, incineration treatment needs to be equipped with special incineration equipment, which requires a large investment, and the decomposition product hydrogen fluoride is easy to corrode the equipment. If trifluoromethane can be utilized as a resource and trans...

Claims

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Application Information

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IPC IPC(8): C07C19/08C07C17/20B01J23/89B01J23/656B01J23/60B01J23/889B01J27/13
CPCC07C17/206C07C17/278C07C17/10B01J23/8986B01J23/8953B01J23/6562B01J23/60B01J23/8892B01J23/002B01J27/13B01J2523/00C07C2523/89C07C2523/656C07C2523/60C07C2523/889C07C2527/13C07C19/08C07C19/10B01J2523/72B01J2523/822B01J2523/847B01J2523/27B01J2523/824
Inventor 周飞翔王术成刘武灿张建君韩文锋
Owner ZHEJIANG RES INST OF CHEM IND CO LTD
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