Claims
- 1. A gas phase process for producing dialkyl carbonates which comprises contacting an alkanol, carbon monoxide, and oxygen with a catalyst to produce dialkyl carbonate, the catalyst having been prepared by heating a solid copper compound in the presence of a zeolite to form a zeolite containing copper.
- 2. The process of claim 1 wherein the zeolite is a hydrogen or a Group IA or IIA Y zeolite having a bulk silica/alumina molar ratio of from about 2:1 to about 30:1, and a framework silica/alumina molar ratio of from about 2:1 to about 30:1, and a ratio of framework to bulk silica/alumina molar ratios of from about 1:1 to about 2:1.
- 3. The process of claim 2 wherein the bulk silica/alumina molar ratio of the Y zeolite is from about 5:1 to about 25:1, the framework silica/alumina molar ratio of from about 9:1 to about 25:1, and the ratio of framework to bulk silica/alumina molar ratios of from about 1:1 to about 1.3:1.
- 4. The process of claim 3 wherein the alkanol is methanol, ethanol, or propanol.
- 5. The process of claim 4 wherein the alkanol is methanol.
- 6. The process of claim 4 wherein the contacting temperature is from about 20.degree. C. to about 350.degree. C.
- 7. The process of claim 6 wherein the contacting temperature is from about 90.degree. C. to about 250.degree. C.
- 8. The process of claim 6 wherein the alkanol, carbon monoxide, and oxygen have a gas hourly space velocity of from about 100 hr.sup.-1 to about 50,000 hr.sup.-1.
- 9. A gas phase process for producing dimethyl carbonate which comprises contacting methanol, carbon monoxide, and oxygen with a catalyst at a temperature of from about 90.degree. C. to about 250.degree. C. to produce dimethyl carbonate, the catalyst having been prepared by heating a solid copper compound in the presence of a Y zeolite to form a Y zeolite containing copper, wherein the Y zeolite has a bulk silica/alumina molar ratio of from about 5:1 to about 25:1, a framework silica/alumina molar ratio of from about 9:1 to about 25:1, and a ratio of framework to bulk silica/alumina molar ratios of from about 1:1 to about 1.3:1; and wherein the methanol, carbon monoxide, and oxygen have a gas hourly space velocity of from about 500 hr.sup.-1 to about 2,000 hr.sup.-1.
Parent Case Info
This application is a continuation-in-part of U.S. application Ser. No. 07/954,771, filed Sep. 30, 1992, now abandoned.
US Referenced Citations (12)
Foreign Referenced Citations (1)
Number |
Date |
Country |
0429675 |
Jun 1990 |
EPX |
Non-Patent Literature Citations (1)
Entry |
Lee et al., "Alkylcarbonate Synthesis by New Catalytic System," Dioxygen Activation and Homogeneous Catalytic Oxidation, pp. 631-640, 1991. |
Continuation in Parts (1)
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Number |
Date |
Country |
Parent |
954771 |
Sep 1992 |
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