Did You Know...
...that the x-ray was discovered purely by accident? When German physicist Wilhelm Konrad von Roentgen was experimenting with cathode rays in 1895, he put an activated Crookes tube in a book and went out to lunch. When he returned, he discovered that a key that had also been placed in the book showed up as an image on the developed film!
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| Number | Title | Issue Date |
| 7686948 | Method of removing sulfur from sulfur-containing hydrocarbon streams The use of one or more alkali metals, preferably sodium, to remove sulfur from hydrocarbon streams containing up to about 100 wppm sulfur. The hydrocarbon stream is introduced into a reactor where it is contacted with one or more alkali metals. The treated hydrocarb... | 03/30/2010 |
| 7588680 | Desulphurization of petroleum streams using metallic sodium In some embodiments, the invention is a method of removing sulfur from a hydrocarbon feed using the steps of dissolving metallic sodium in a first solvent, combining the sodium/first solvent solution with a sulfur-free alkane or cycloalkane second solvent, vaporizin... | 09/15/2009 |
| 7527724 | Process for desulfurization of hydrocarbons The present invention is a method of removing sulphur from a hydrocarbon feed stream, comprising the steps of: (a) dissolving sodium in a liquid solvent to form a solution containing sodium atoms; (b) combining the... | 05/05/2009 |
| 7507327 | Desulfurizing organosulfur heterocycles in feeds with supported sodium Refractory or hard sulfur found in a hydrocarbon stream containing refractory sulfur heterocycle compounds, particularly those exhibiting steric hindrance, is removed from the stream by contacting it with a sodium reagent comprising a sodium component, having free s... | 03/24/2009 |
| 7192516 | Desulfurization of petroleum streams using metallic sodium The invention is a method of removing sulfur from a hydrocarbon feed using the steps of dissolving metallic sodium in a solvent and combining the sodium/solvent solution with a liquid hydrocarbon feed containing an organosulfur species. The pressure of combination i... | 03/20/2007 |
| 6210564 | Process for desulfurization of petroleum feeds utilizing sodium metal Sulfur-containing petroleum feeds are desulfurized by contacting the feeds with staged addition of sodium metal at temperatures of at least about 250° C. in the presence of excess hydrogen to sodium metal. The formation of Na2 S is substantial... | 04/03/2001 |
| 5250181 | Process for removing elemental sulfur from fluids A process for removing elemental sulfur from fluids such as refined petroleum products transported through pipelines for the transportation of sour hydrocarbon streams. The fluids are contacted with an aqueous solution containing caustic, an aliphatic mer... | 10/05/1993 |
| 5160045 | Process for removing elemental sulfur from fluids A process for removing elemental sulfur from fluids such as refined petroleum products transported through pipelines for the transportation of sour hydrocarbon streams. The fluids are contacted with an aqueous solution containing caustic, sulfide and opti... | 11/03/1992 |
| 4719000 | Upgrading petroleum asphaltenes 1. A process for reducing the sulfur content of petroleum asphaltenes containing sulfur comprising: (1) forming a mixture of petroleum asphaltenes containing sulfur and a liquid selected from the group consisting of water, methanol, carbon dioxide and mix... | 01/12/1988 |
| 4566965 | Removal of nitrogen and sulfur from oil-shale Disclosed is a method for enhancing the removal of nitrogen and sulfur from oil-shale which process comprises heating the oil-shale with a basic solution comprised of one or more hydroxides of the alkali metal and alkaline-earth metals.... | 01/28/1986 |
| 4255252 | Procedure for the reprocessing of used lubricating oils A method for reprocessing used lubricating oils is disclosed wherein the oil is dried, treated with finely dispersed sodium metal at elevated temperature, the remaining free or organically bound metal is decomposed by means of an active hydrogen containin... | 03/10/1981 |
| 4076613 | Combined disulfurization and conversion with alkali metals Improved processes for the combined desulfurization and hydroconversion of various sulfur-containing pertroleum oils, and particularly various residua feedstocks, are disclosed. These feedstocks are thus contacted with alkali metals, such as sodium, in th... | 02/28/1978 |
| 4062762 | Process for desulfurizing and blending naphtha A sulfur-containing naphtha is separated into at least three fractions. Each fraction is desulfurized separately by a different desulfurization method. Subsequently, the desulfurized fractions are recombined. The intermediate boiling point naphtha fractio... | 12/13/1977 |
| 3976559 | Combined catalytic and alkali metal hydrodesulfurization and conversion process A process for the combined hydrodesulfurization and hydroconversion of certain heavy hydrocarbon feedstocks is disclosed. Specifically, asphaltene-containing feedstocks, such as residua feedstocks, are initially contacted with a hydrodesulfurization catal... | 08/24/1976 |
