Claims
- 1. An oxidation process comprising contacting an exhaust effluent from an internal combustion engine with a solid catalytic material in the presence of oxygen and under conditions including a temperature from about 150.degree. C. to about 900.degree. C., a pressure of about atmospheric and a gas hourly space velocity, expressed at standard temperature and pressure, of from about 15000 hr.sup.-1 to about 70,000 hr.sup.-1, said solid catalyst material containing a synthetic amorphous solid prepared by the steps of hydrolyzing and polymerizing in the presence of water a silane having the formula R(Si)X.sub.3, wherein R is a nonhydrolyzable organic group, X is a hydrolyzable group and (Si) is selected from the group consisting of ##STR9## and ##STR10## and calcining the polymerized product, said silane being admixed with a second compound, R'.sub.n MY.sub.m, wherein R' is selected from the group consisting of the same groups as R, Y is selected from the group consisting of the same groups as X and oxygen, M is at least one member selected from the group consisting of the elements of Group VIII of the Periodic Table, m is any number greater than 0 and up to 8 and n is from 0 to any number less than 8.
- 2. The process of claim 1 wherein R of said catalyst material is a member selected from the group consisting of alkyl, cycloalkyl, aryl, alkenyl, cycloalkenyl and said members hydroxy-substituted, halogen-substituted and amino-substituted.
- 3. The process of claim 1 wherein X of said catalyst material is a member selected from the group consisting of halogen and alkoxy of from 1 to 10 carbon atoms, alkali metaloxy, alkaline earth metaloxy, carboxy and amino.
- 4. The process of claim 3 wherein X is chlorine.
- 5. The process of claim 3 wherein X is alkoxy.
- 6. The process of claim 5 wherein X is methoxy.
- 7. The process of claim 4 wherein R(Si)X.sub.3 is selected from the group consisting of phenyl trichlorosilane, (C.sub.6 H.sub.5).sub.3 Si--O--SiCl.sub.3, methyl trichlorosilane, ethyl trichlorosilane, dodecyl trichlorosilane and mixtures thereof.
- 8. The process of claim 1 wherein the calcination step in preparation of said catalyst material is carried out at a temperature of from about 200.degree. C. to about 600.degree. C.
- 9. The process of claim 1 wherein there is present in the final calcined catalyst material a member selected from the group consisting of platinum and palladium.
- 10. The process of claim 1 wherein there is present in the hydrolysis and polymerization steps in preparation of said catalyst material an inorganic compound consisting of an anion of M and Y and a cation selected from the group consisting of hydrogen, alkali metal, alkaline earth metal and ammonium.
- 11. The process of claim 10 wherein said inorganic compound is selected from the group consisting of sodium ethyl chloroplatinate and chloroplatinic acid.
- 12. The process of claim 1 wherein the steps of hydrolyzing and polymerizing in preparation of said catalyst material are carried out in the presence of water and an organic solvent.
- 13. The process of claim 12 wherein the organic solvent is an alcohol.
- 14. The process of claim 13 wherein the alcohol is methanol.
- 15. The process of claim 1 wherein the steps of hydrolyzing and polymerizing in preparation of said catalyst material are carried out in the presence of water and a base.
- 16. The process of claim 15 wherein the base is selected from the group consisting of pyridine and triethylamine.
- 17. The process of claim 1 wherein said oxygen is present in excess of that stoichiometrically required for complete combustion by at least about 50 percent.
CROSS-REFERENCE
This is a continuation-in-part of application Ser. No. 738,788, filed Nov. 4, 1976, now abandoned, which was a continuation-in-part of application Ser. No. 638,405, filed Dec. 8, 1975, now U.S. Pat. No. 4,003,825, which was a division of application Ser. No. 450,967, filed Mar. 14, 1974, now U.S. Pat. No. 3,983,055.
US Referenced Citations (5)
Foreign Referenced Citations (2)
Number |
Date |
Country |
586487 |
Apr 1958 |
BEX |
436906 |
Oct 1935 |
GBX |
Divisions (1)
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Number |
Date |
Country |
Parent |
450967 |
Mar 1974 |
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Continuation in Parts (2)
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Number |
Date |
Country |
Parent |
738788 |
Nov 1976 |
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Parent |
638405 |
Dec 1975 |
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