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Solid catalyst and its preparation and method of catalytic preparation epoxy propane hexafluoride

A technology of hexafluoropropylene oxide and solid catalyst is applied in chemical instruments and methods, physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, etc., and can solve the problem of low conversion rate of hexafluoropropylene and industrialization. Difficulty in application, reduced selectivity of hexafluoropropylene oxide, etc.

Active Publication Date: 2007-05-02
SHANDONG DONGYUE WEILAI HYDROGEN ENERGY MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Catalysts in the prior art catalyze the preparation of hexafluoropropylene oxide. The conversion rate of hexafluoropropylene is too low, which will inevitably bring complicated post-treatment processes. If the conversion rate of hexafluoropropylene is increased, the selection of hexafluoropropylene oxide will be caused. The performance is reduced, so that it brings difficulties to industrial applications

Method used

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  • Solid catalyst and its preparation and method of catalytic preparation epoxy propane hexafluoride

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Weigh 2g of oxalic acid and dissolve it in 5ml of water, then mix it with 5ml of ethylenediamine, add 3.5g of silver oxide under full stirring, and continue stirring to dissolve it to form a silver ammonium complex solution. Weigh SiO 2 3g, mixed with 0.5g BaF thoroughly, then granulated, screened 20-200 (preferably 20-60) mesh particles, added to the above solution, mixed for 1 hour while stirring and ultrasonic to form a uniform slurry. After drying in an oven at 100°C for 5 hours, calcining in a muffle furnace at 450°C for 6 hours, granulating after natural cooling, and sieving to get 20-200 mesh (preferably 20-60 mesh) particles. The composition of this catalyst is:

[0024] Ag 30%

[0025] BaF 10%

[0026] SiO 2 60%

[0027] Put the catalyst of this composition in a tubular reactor, maintain the reaction temperature at 135°C, feed hexafluoropropylene and molecular oxygen, the molar ratio i...

Embodiment 2

[0029] The preparation method is the same as in Example 1, but BaF is changed to BaCl 2 . The composition of the catalyst is:

[0030] Ag 30%

[0031] BaCl 2 10%

[0032] SiO 2 60%

[0033] Put the catalyst of this composition in a tubular reactor, maintain the reaction temperature at 120°C, feed hexafluoropropylene and molecular oxygen, the molar ratio is 1:0.5, and the reaction pressure is 2.5Mpa, the result is: the conversion of hexafluoropropylene The yield was 51.3%, and the selectivity of hexafluoropropylene oxide was 70.2%.

Embodiment 3

[0035] The preparation method is the same as in Example 1, except that BaF is changed to CsCl. The catalyst consists of:

[0036] Ag 30%

[0037] CsCl 10%

[0038] SiO 2 60%

[0039]Put the catalyst of this composition in a tubular reactor, maintain the reaction temperature at 135°C, feed hexafluoropropylene and molecular oxygen, the molar ratio is 1:0.5, and the reaction pressure is 2.5Mpa, the result is: the conversion of hexafluoropropylene The yield was 40.3%, and the selectivity of hexafluoropropylene oxide was 48.2%.

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Abstract

An Ag-series solid catalyst for preparing hexafluoroepoxy propane from hexapropene and molecular oxygen by gas-phase method in tubular reactor contains Ag (10-50 mass%), alkali (or alkali-earth) metal compound (1-20), and carrier (49-89). It has high output rate and selectivity of product.

Description

technical field [0001] The invention relates to a solid catalyst and a method for preparing hexafluoropropylene oxide by catalyzing the same. The catalyst is used for preparing hexafluoropropylene oxide by taking hexafluoropropylene and molecular oxygen as starting materials to undergo catalytic oxidation reaction in a reactor. Background technique [0002] Hexafluoropropylene oxide C 3 f 6 O, also known as perfluoropropylene oxide, is an important intermediate for the synthesis of perfluorinated ion exchange resins, perfluorinated plastics, perfluororubbers, perfluorinated lubricating oils, perfluorinated heat-resistant media, fluorosurfactants, solvents and other organic fluorine materials body. Known oxidation hexafluoropropylene is prepared the oxidizing agent used of hexafluoropropylene oxide mainly to be: hydrogen peroxide (US3358003,1967; US 3250808,1966; JP 63027487,1988); Hypochlorite (US 4902810,1990); Peroxide (GB 1547493, 1979); Carbonate (US 4287128, 1981); ...

Claims

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Application Information

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IPC IPC(8): B01J23/66C07D303/48
Inventor 张永明张恒黄忠喜王汉利秦建昭
Owner SHANDONG DONGYUE WEILAI HYDROGEN ENERGY MATERIAL CO LTD
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