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US 4,303,486 AGranted
Methods of photocatalytic decarboxylation of saturated carboxylic acid
AssigneeBoard of Regents, The University of Texas System
InventorsAllen J. Bard, Bernhard Kraeutler
Life of this patent
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Abstract
Methods for heterogeneous photocatalytic decarboxylation of saturated carboxylic acids on several n-type semiconductor powders are disclosed. Major reaction products are the corresponding alkanes and carbon dioxide.
Claims22
A method for decarboxylating an aliphatic carboxylic acid solution comprising:
- providing an aliphatic carboxylic acid solution;
- providing a suitable n-type semiconductor powder;
- mixing said powder in said carboxylic acid solution to form a mixture;
- irradiating said mixture at a temperature and for a time sufficient for the evolution of carbon dioxide gas;
- to form as the major reaction products carbon dioxide and the alkane corresponding to the carboxylic acid of said solution.
2 more elements
A method for the heterogeneous decarboxylation of an aliphatic carboxylic acid solution comprising:
- providing an aliphatic carboxylic acid solution;
- providing an n-type TiO.sub.2 powder;
- mixing at least about 5 mg of said powder per mL in said solution to form a mixture;
- irradiating said mixture, causing the temperature of said mixture to rise to at least about 42.degree. C., and continuing said irradiation for a time sufficient for the evolution of carbon dioxide gas;
- to form as the major reaction products carbon dioxide and the alkane corresponding to the carboxylic acid of said solution.
2 more elements
A method for the heterogeneous decarboxylation of a saturated aliphatic carboxylic acid solution on an n-type semiconductor powder, comprising:
- providing at least about 15 mL of aliphatic carboxylic acid solution;
- providing at least about 100 mg of n-type TiO.sub.2 powder;
- mixing said powder into said solution, to form a mixture;
- irradiating said mixture for at least about one hour at a temperature of said mixture of at least about 42.degree. C. until carbon dioxide gas is evolved;
- to form as the major reaction products carbon dioxide and the alkane corresponding to said carboxylic acid.
2 more elements
Dependencies are inferred from the claim text.