Method for defluorinating and degrading complete fluorine substituted compounds

A fluorooctane sulfonate, perfluorooctanoic acid technology, applied in chemical instruments and methods, organic decomposition, solid waste removal, etc., can solve the problems of unclear changes in PFOS, inability to effectively decompose PFOA and PFOS, etc.
CN100347137CInactive Publication Date: 2007-11-07TSINGHUA UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
TSINGHUA UNIV
Publication Date
2007-11-07
Estimated Expiration
Not applicable · inactive patent

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Abstract

A defluorinating and degrading method of fluorine substituted compound is characterized by vacuum ultraviolet irradiating PFOS and PFOA etc. fluorine substituted compound at anaerobic condition, defluorinating reacting fluorine substituted compound at irradiation of 185nm ultraviolet mercury vapour light or 172nm xenon quasi molecule laser light, inducing protective inert gas or reducing gas for realizing anaerobic condition, or adding reducing substance or semiconductor catalyst with high conducting band energy level during reacting process to improve defluorinating and decomposing ratio. It achieves simple operation and non-toxic.
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Description

technical field

[0001] The invention relates to the technical field of decomposition of perfluorooctanoic acid or perfluorooctane sulfonate, and is used for eliminating perfluorooctanoic acid or perfluorooctane sulfonate in water, air and soil. Background technique

[0002] Perfluorinated compounds (PFCs) refer to organic compounds in which the hydrogen (H) connected to the carbon atom (C) in the organic structure is replaced by fluorine (F), such as carbon tetrafluoride (CF 4 ) and perfluorooctane sulfonate (PFOS) - CF 3 -CF 2 -CF 2 -CF 2 -CF 2 -CF 2 -CF 2 -CF 2 -SO 3 - . Perfluorinated compounds have been used since the 1950s and are widely used in industrial and consumer products, including as protective coatings for fabrics and carpets, paper coatings, insecticide components, surfactants, etc.

[0003] Since many research reports have shown that a widely used perfluorinated compound-perfluorooctane sulfonate (PFOS) exists in wild animals and humans around the ...

Claims

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