Fragmentation of heavy hydrocarbons using an ozone-containing fragmentation fluid
View Patent ↗A method for recovering valuable chemical products from heavy hydrocarbons such as tar sand or petroleum waste products is disclosed and described. Heavy hydrocarbons can be contacted with a fragmentation fluid which includes ozone and a solvent carrier. The fragmentation fluid can be provided at supercritical conditions. For example, supercritical CO 2 can be an effective liquid solvent carrier for ozone. During contact with the fragmentation fluid, the heavy hydrocarbons are reduced in size to form a product mixture of chemical compounds. This product mixture typically includes chemical species which are more suitable than the original heavy hydrocarbons to commercial uses and/or further separation to provide useful starting materials for a wide variety of synthesis and industrial applications.
1. A method of upgrading heavy hydrocarbons, comprising the step of contacting the heavy hydrocarbons with a fragmentation fluid to form a product mixture of smaller molecular fragments, said fragmentation fluid including ozone and a liquid solvent carrier, wherein the liquid solvent carrier is a supercritical fluid and the heavy hydrocarbons have a molecular weight from about 700 to 2,000,000.
2. The method of claim 1 , wherein the liquid solvent carrier comprises a member selected from the group consisting of supercritical CO 2 , supercritical N 2 O, supercritical NH 3 , supercritical ethane, supercritical lower alkanes, and combinations or mixtures thereof
3. The method of claim 2 , wherein the liquid solvent carrier is supercritical CO 2 .
4. The method of claim 1 , wherein the liquid solvent carrier comprises from about 50 vol % to about 99.9 vol % of the fragmentation fluid.
5. The method of claim 1 , wherein the fragmentation fluid further comprises a secondary liquid solvent.
6. The method of claim 5 , wherein the secondary liquid solvent is a member selected from the group consisting of methanol, ethylene, hydrochloric acid, ammonia, 2-propanol, acetonitrile, dichloromethane, water, and combinations or mixtures thereof.
7. The method of claim 1 , wherein the step of contacting is substantially free of a catalyst that participates in upgrading of the heavy hydrocarbons.
8. The method of claim 1 , wherein the heavy hydrocarbons are a member selected from the group consisting of asphaltenes, paraffin waxes, tar, tar sands, petroleum waste products, and combinations thereof.
9. The method of claim 8 , wherein the heavy hydrocarbons are asphaltenes.
10. The method of claim 8 , wherein the heavy hydrocarbons are petroleum waste products.
11. The method of claim 8 , wherein the heavy hydrocarbons are tar sands.
12. The method of claim 1 , wherein the heavy hydrocarbons have a molecular weight from about 750 to 20,000.
13. The method of claim 1 , wherein the step of contacting occurs over a time from about 30 seconds to 60 minutes.
14. The method of claim 1 , further comprising the step of separating the product mixture from the fragmentation fluid.
15. The method of claim 14 , further, comprising the step of separating the product mixture into useful fractions for further processing.
16. The method of claim 1 , wherein a majority of the product mixture has a molecular weight from about 45 to about 400.