Electrolysis: processes – compositions used therein – and methods – Electrolytic synthesis – Preparing inorganic compound
Reexamination Certificate
2008-05-20
2008-05-20
Phasge, Arun S. (Department: 1795)
Electrolysis: processes, compositions used therein, and methods
Electrolytic synthesis
Preparing inorganic compound
C205S687000, C205S768000
Reexamination Certificate
active
11333628
ABSTRACT:
This invention relates to technology of carbographite materials, in particular, to production of oxidized graphite for making low foaming temperature foamed graphite, which is used for manufacturing flexible foil, fireproof materials, water-purification sorbents, materials for cleaning up spills of petroleum products, and so on. The method for producing oxidized low foaming temperature graphite comprises the stages of (a) preparing a mixture based on graphite particles and at least one aqueous solution of an acid; (b) activating the surface of said graphite particles to produce acid-containing functional groups on the surface of the particles; (c) treating the graphite particles to produce a graphite intercalation compound; (d) washing said compound with water; (e) drying said compound, and heat-treating it to produce foamed graphite, wherein stage (b) and (c) are carried out by electrochemical treatment at a quantity of electricity within 300 to 600 mA·hour/g of graphite. The technical result is oxidized graphite having improved characteristics, in particular, high uniformity, low bulk density, and capacity for foaming at temperatures of 150° C. to 260° C.
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Avdeev Viktor Vasilievich
Finaenov Alexandr Ivanovich
Ionov Sergey Gennadievich
Krasnov Vladimir Vasilievich
Maksimova Nataliya Vladimirovna
Avdeev Viktor Vasilievich
Houston Eliseeva LLP
Phasge Arun S,.
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