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Method for decomposition of peroxide in perfluoropolyether

A technology of perfluoropolyether peroxide and perfluoropolyether, which is applied in chemical instruments and methods, dissolution, chemical/physical processes, etc., and can solve problems such as strong corrosion, easy damage of equipment and its components, and high operating costs , to achieve the effect of low equipment requirements, stable performance and short time

Active Publication Date: 2017-01-11
ZHONGHAO CHENGUANG RES INST OF CHEMICALINDUSTRY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Moreover, due to the strong corrosiveness of the material, the equipment and its parts are easily damaged, so the operating cost is also high.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] The measured peroxide value is 4.2×10 -2 1Kg of perfluoropolyether prepared by mmol / g photooxidative polymerization is placed in a 5L jacketed glass reactor, and then 10 g of powdered platinum carbon catalyst (10% pt content) is added, and the reactor is equipped with a stirring and condensing reflux device, Heat and control the temperature in the kettle to 80°C, react at normal pressure for 10 hours, then lower the temperature, filter and separate the catalyst and the material, and the output product is 0.98Kg (the decomposed product may have a small amount of low-molecular compounds volatilized, and some may be in the Loss in the separation process), the iodometric method records the product peroxide value 1.07 × 10 -5 mmol / g.

Embodiment 2

[0036] The measured peroxide value is 4.2×10 -21Kg of perfluoropolyether prepared by mmol / g photooxidative polymerization is placed in a 5L jacketed stainless steel kettle, and then 10g of KF metal catalyst (KF crystal, easy to absorb moisture) is added, and the reaction kettle is stirred, and the temperature in the kettle is controlled by heating to 100°C, reacted at normal pressure for 6 hours, then lowered the temperature, the output product was 0.97Kg, and the peroxide value of the product was 1.25×10 measured by iodometric method -5 mmol / g.

Embodiment 3

[0038] The measured peroxide value is 4.2×10 -2 1Kg of perfluoropolyether prepared by mmol / g photo-oxidative polymerization is placed in a 5L jacketed stainless steel kettle, and then 10g of granular iron oxide-chromium oxide / carbon metal catalyst (iron oxide-chromium oxide content 10%) is added, and the reaction kettle belt With stirring, heat to control the temperature in the kettle to 100°C, react under normal pressure for 6 hours, then cool down, and the discharged product is 0.97Kg, and the peroxide value of the product measured by iodometric method is 1.18×10 -5 mmol / g.

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Abstract

The invention belongs to the field of organic chemistry, and relates to a method for decomposition of peroxide in perfluoropolyether, one or more of metal catalysts, metal oxide catalysts and metal fluoride catalysts are added to a perfluoropolyether product prepared by a photooxidation method, and the peroxide in the perfluoropolyether product is decomposed at the temperature of 80-150 DEG C. The method provided by the invention has the advantages of relatively thorough decomposition of fluorine-containing peroxide, short time and low requirements for equipment. The peroxide value of perfluoropolyether after treatment is low and the performance is stable. The method can also be used for treatment of similar fluorine-containing peroxide.

Description

technical field [0001] The invention belongs to the field of organic chemistry, in particular to a method for removing peroxides from synthesized perfluoropolyethers. Background technique [0002] Perfluoropolyether (PFPE) is a polymer with only three elements of C, F, and O in the molecule, and it is liquid at room temperature. There are stronger C-F bonds in PFPE molecules instead of C-H bonds in hydrocarbons, and due to the existence of C-O and C-C strong covalent bonds, as well as the neutral characteristics of PFPE molecules, PFPE has higher chemical stability and oxidation stability. and good chemical inertness and insulating properties. This type of perfluoropolyether has a wide range of potential applications, such as when the terminal group is fluorinated to form a stable -CF 3 group, it can be used as perfluoropolyether oil; when the terminal group is hydrolyzed to form -COOH, it can be used as an emulsifier, which is widely used in oil fields, coatings, fluoropo...

Claims

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Application Information

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IPC IPC(8): C08G65/00B01F17/42C09K23/42
Inventor 张鸣张建新陈炯李斌刘波吕太勇罗源军
Owner ZHONGHAO CHENGUANG RES INST OF CHEMICALINDUSTRY CO LTD