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Method for preparing 1,1,1,2,3,3-hexafluoropropane from 1,1,1,2,3,3-hexafluoropropylene and hydrogen gas

A technology of hexafluoropropylene and hexafluoropropane, which is applied in the field of preparation 1, can solve the problems of high production costs, achieve high raw material utilization, mild reaction conditions, and reduce production costs

Active Publication Date: 2008-03-26
ZHEJIANG LANTIAN ENVIRONMENTAL PROTECTION HI TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] In order to overcome the defect of high production cost of the existing HFC-236ea preparation process by catalytic hydrogenation of hexafluoropropylene, the present invention provides a method with high yield, low cost, and industrial continuous production to prepare HFC-236ea

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Catalyst preparation:

[0043] In the first step of auxiliary agent impregnation, weigh 1.20g La(NO 3 ) 3 ·nH 2 O, add 16ml deionized water to make La(NO 3 ) 3 Solution, add 15.0g 20-40 mesh γ-Al to the solution 2 o 3 , impregnated at room temperature for 18h, then dried at 120°C for 5.0h, and fired at 500°C for 4.0h.

[0044] The second step of impregnation: weigh 14.86g Ni(NO 3 ) 2 ·6H 2 O, 3.42g Cu(nO 3 ) 2 ·3H 2 O, add 10ml deionized water to make Ni(NO 3 ) 2 and Cu(NO 3 ) 2 The mixed solution of the mixed solution, the sample after the previous step of roasting is added to the mixed solution for impregnation, drying and roasting treatment, the treatment conditions are the same as the previous step, and the catalyst Ni-Cu-La 2 o 3 / γ-Al 2 o 3 precursor.

[0045] Weigh 6.0 ml of the prepared catalyst sample and put it into a reaction tube (8 mm in inner diameter, 430 mm in length) made of quartz glass. Introduce a hydrogen-nitrogen mixture, in wh...

Embodiment 2

[0047] Weigh 2.32g Ce(NO 3 ) 3 ·6H 2 O, add 16ml deionized water to make Ce(NO 3 ) 3 Solution, add 15.0g 20-40 mesh γ-Al to the solution 2 o 3 , impregnated at room temperature for 24h, then dried at 100°C for 6.0h, and roasted at 450°C for 5.0h; the second step of impregnation: weigh 22.29g Ni(NO 3 ) 2 ·6H 2 O, 3.42gCu(NO 3 ) 2 ·3H 2 O, add 10ml deionized water to make Ni(NO 3 ) 2 and Cu(NO 3 ) 2 The mixed solution, the sample after the previous roasting is added to the mixed solution for impregnation, drying and roasting treatment, the treatment conditions are the same as the previous step, and the catalyst Ni-Cu-CeO 2 / γ-Al 2 o 3 precursor.

[0048] Catalyst reduction and hydrogenation activity testing methods are the same as in Example 1. The proportion of hydrogen in the reducing gas is 30%, and the space velocity is 400h -1 , firstly from room temperature to 180°C at a heating rate of 2°C / min, at 180°C for 2.0 hours, then at 400°C at a heating rate of ...

Embodiment 3

[0050] Weigh 2.21g (NH 4 ) 6 Mo 7 o 24 4H 2 O, add 16ml deionized water to make a solution, add 15.0g 20-40 mesh γ-Al to the solution 2 o 3 , impregnated at room temperature for 10h, then dried at 90°C for 8.0h, and fired at 550°C for 3.5h; the second step of impregnation: weigh 11.14g Ni(NO 3 ) 2 ·6H 2 O, 5.70gCu(NO 3 ) 2 ·3H 2 O, add 10ml deionized water to make Ni(NO 3 ) 2 and Cu(NO 3 ) 2 The mixed solution, the sample after the previous roasting is added to the mixed solution for impregnation, drying and roasting treatment, the treatment conditions are the same as the previous step, and the catalyst Ni-Cu-MoO 3 / γ-Al 2 o 3 precursor.

[0051] Catalyst reduction and hydrogenation activity testing methods are the same as in Example 1. The proportion of hydrogen in the reducing gas is 5%, and the space velocity is 800h -1 , firstly from room temperature to 230°C at a heating rate of 4°C / min, at 230°C for 1.0h, then at 500°C at a heating rate of 5°C / min, at ...

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Abstract

The process of preparing 1, 1, 1, 2, 3, 3-hexafluoro propane with 1, 1, 1, 2, 3, 3-hexafluoro propylene and hydrogen belongs to the field of hydrogenating organic halide to prepare alkane. Compound 1, 1, 1, 2, 3, 3-hexafluoro propylene and hydrogen are made to react in the presence of catalyst comprising one or several of Ni, Cu, Fe, Cr, Zn and Al and one or several of RE metal oxide, transition metal oxide and alkali metal oxide. The preparation process with non-noble metal as the main active components in the catalyst has greatly lowered cost, simple reaction process, high material utilizing rate and no pollution.

Description

technical field [0001] The invention belongs to the technical field of preparing alkanes by hydrogenation of halogen-containing organic compounds, in particular a method for preparing 1,1,1,2,3,3-hexafluoropropane from hexafluoropropylene and hydrogen in the presence of a catalyst. Background technique [0002] Because CFCs and HCFCs substances widely used in refrigerants, fire extinguishing agents, blowing agents and other industries have a destructive effect on the ozone layer and produce a greenhouse effect, the development of substitutes for CFCs and HCFCs has become a current international hot topic. 1, 1, 1, 2, 3, 3-hexafluoropropane (HFC-236ea) is a non-chlorofluorocarbon, which not only has similar physical and chemical properties to HFC-236fa, but also has an ozone depletion potential (ODP) of 0. The warming potential (GWP) is only 1200 (CO 2 , 100 =1), far lower than the GWP of HFC-236fa=9400. 1,1,1,2,3,3-hexafluoropropane (HFC-236ea) can be used as refrigerant, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C19/08C07C17/354
Inventor 徐卫国刘武灿
Owner ZHEJIANG LANTIAN ENVIRONMENTAL PROTECTION HI TECH
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