Organic compounds -- part of the class 532-570 series – Organic compounds – Carboxylic acids and salts thereof
Reexamination Certificate
2008-01-17
2011-11-15
Katakam, Sudhakar (Department: 1621)
Organic compounds -- part of the class 532-570 series
Organic compounds
Carboxylic acids and salts thereof
C562S400000, C562S497000, C562S512400, C562S517000, C562S521000
Reexamination Certificate
active
08058472
ABSTRACT:
The present invention concerns a new efficient method for the selective transformation, under mild conditions and in aqueous medium, of gaseous (ethane, propane and n-butane) and liquid (n-pentane, n-hexane, cyclopentane and cyclohexane) alkanes into carboxylic acids bearing one more carbon atom, characterized by a single-pot low-temperature (25-60° C.) reaction of the alkane with carbon monoxide in water/acetonitrile liquid medium, either in the absence or in the presence of a metal catalyst, in systems containing also an oxidant (a peroxodisulphate salt).
REFERENCES:
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Reis et al: “Vanadium-catalyzed carboxylation of linear and cyclic C5 and C6 alkanes”, Journal of Catalysis, vol. 235, pp. 333-340, XP002479064, Sep. 4, 2005.
Nizova GV et al: “Carboxylation of methane with CO or CO2 in aqueous solution catalysed by vanadium complexes”, Chemical Communications—Chemcom, Royal Society of Chemistry, No. 17, pp. 1885-1886, XP002286129, Jan. 1, 1998.
Asadullah M et al: “One step carboxylation reaction of saturated hydrocarbons with CO by Co(OAc)2 catalyst under mild conditions”, Applied Catalysis A: General, Elsevier Science, Amsterdam, NL, vol. 194-195, pp. 443-452, XP004272248, Mar. 13, 2000.
Reis P M et al: “Single-Pot Conversion of Methane into Acetic Acid in the Absence of CO and with Vanadium Catalysts Such as Amavadine”, Angewandte Chemie. International Edition, Wiley VCH Verlag, Weinheim, vol. 42, No. 7, pp. 821-823, XP002286136, Feb. 17, 2003.
Frausto Da Silva Joao
Kirillov Alexander
Kirillova Marina
Pombeiro Armando
Silva Jose Armando
Instituto Superior Tecnico
Katakam Sudhakar
Pearl Cohen Zedek Latzer LLP
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