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US 5,347,057 AGranted
Method for oxidation of methane and other hydro-carbons
OwnerMirza M. T. Khaninventor
Life of this patent
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Abstract
This invention teaches the oxidation of alkanes and cycloalkanes in the presence of air or oxygen and a ruthenium metal complex catalyst containing an end or bridged-oxo group with a liquid L and carboxylato groups. This oxidation process results in very high yields, utilizes very little energy and has a high catalyst turnover rate.
Claims16
A process for selectively oxidizing alkanes or aromatic hydrocarbons where the products of oxidation are alcohols, ketones or mixtures thereof comprising the steps of:
- (a) placing the alkane or aromatic hydrocarbon in contact with oxygen, and
- (b) adding a ruthenium metal complex catalyst activated by an "end-oxo"
- group, said catalyst having the formula LRu=O, where L is a Schiff or a substituted Schiff base;
- or
- a "bridging -oxo" group, said catalyst having the formula:
- ##STR3## wherein L is a Schiff base or a substitute Schiff base and R is H, or an alkyl (C<10) or an aryl (C<30).
3 more elements
A process for selectively oxidizing alkanes or aromatic hydrocarbons comprising the steps of:
- (a) adding said alkane or hydrocarbon to a mixed aqueous-organic solvent in the presence of oxygen;
- (b) adding a ruthenium metal complex, activated by an end-oxo group, said catalyst having the formula LRu-), where L is a Schiff or a substituted Schiff base;
- (c) or a bridging-oxo group said catalyst having the formula:
- ##STR4## wherein L is a Schiff base or a substituted Schiff base and R is H or alkyl (C40) or an aryl (CL30).
- (d) and at least one carboxylato group to the solvent system in a concentration range of 10.sup.3 to 10.sup.-6 moles of catalyst per liter of solution and
- (e) where the temperature ranges between 20.degree.-60.degree. C. and the pressure ranges between 5-20 atmospheres.
3 more elements
Dependencies are inferred from the claim text.