Fluorinated carbons and methods of manufacture
AssigneeThe Electrosynthesis Company, Inc.
InventorNorman L. Weinberg
Life of this patent
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Abstract
Discontinuities, edge sites and grain boundaries in carbons, the primary locations of instabilities for oxidative corrosion and degradation, are prepared by preoxidation to form carbon-oxides followed by highly selective and relatively mild fluorination to specifically substitute carbon-oxygen functionality with stable carbon-fluorine groups. The novel fluorinated carbons have enhanced chemical and/or electrochemical stabilities to corrosion, improved hydrophobicity, lubricating properties, etc.
Claims35
A method of making a specifically fluorinated carbon, which comprises the steps of preoxidizing a carbon, and fluorinating the preoxidized carbon by specific fluorination to form a preoxidized, specifically fluorinated carbon.
A method of regenerating an oxidized or flooded carbon-containing electrode, which comprises the steps of cleaning the electrode, and specifically fluorinating the cleaned electrode.
A method for extending the useful life of a vitreous or glassy carbon electrode, which comprises the steps of preoxidizing the electrode and fluorinating the preoxidized electrode by specific fluorination.
A method of making a specifically fluorinated carbon, which comprises the steps of preoxidizing a carbon, cleaning the preoxidized carbon, and specifically fluorinating the preoxidized and cleaned carbon in the presence of a catalyzing amount of HF, BF.sub.3 or a metal fluoride salt to form a preoxidized, specifically fluorinated carbon.
A preoxidized, specifically fluorinated carbon or carbon substrate having a fluorine content of at least 8 percent by weight fluorine.
A preoxidized, specifically fluorinated carbon or carbon substrate comprising a carbon selected from the group consisting of glassy carbon, soot and charcoal.
A preoxidized, specifically fluorinated crystalline carbon or carbon substrate comprising a crystalline carbon.
A specifically fluorinated crystalline carbon or carbon substrate comprising a crystalline carbon.
A carbon which comprises a specifically fluorinated vitreous or glassy carbon.
A preoxidized, specifically fluorinated carbon or carbon substrate comprising activated carbon.
Dependencies are inferred from the claim text.