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| 20100300830 | Apparatus for Removing a Contaminant from a Solvent Separation Process - The invention is a process and apparatus for removing a contaminant from an aromatic selective solvent. A feed stream comprising an aromatic hydrocarbon and a non-aromatic hydrocarbon is contacted with the aromatic selective solvent in an extractive distillation zone to produce a raffinate stream comprising the non-aromatic hydrocarbon, and a rich solvent stream comprising the aromatic hydrocarbon and the solvent. The rich solvent stream is separated in a second distillation zone to produce an extract stream comprising the aromatic hydrocarbon, and a lean solvent stream comprising the contaminant and the aromatic selective solvent. At least a portion of the lean solvent stream is washed with a non-aromatic hydrocarbon to produce a clean solvent stream, at least a portion of which is passed to at least one of the extractive distillation zone and the second distillation zone. | 12-02-2010 |
| 20100300939 | Process for Removing a Contaminant from an Aromatic Selective Solvent - The invention is a process and apparatus for removing a contaminant from an aromatic selective solvent. A feed stream comprising an aromatic hydrocarbon and a non-aromatic hydrocarbon is contacted with the aromatic selective solvent in an extractive distillation zone to produce a raffinate stream comprising the non-aromatic hydrocarbon, and a rich solvent stream comprising the aromatic hydrocarbon and the solvent. The rich solvent stream is separated in a second distillation zone to produce an extract stream comprising the aromatic hydrocarbon, and a lean solvent stream comprising the contaminant and the aromatic selective solvent. At least a portion of the lean solvent stream is washed with a non-aromatic hydrocarbon to produce a clean solvent stream, at least a portion of which is passed to at least one of the extractive distillation zone and the second distillation zone. | 12-02-2010 |
| 20110240525 | Distillation Column Pressure Control - Methods and systems for controlling the pressure of distillation columns, for example those operating under vacuum pressure and conventionally equipped with a steam ejector system, are described. Representative distillation columns are used in the separation of thermally unstable components, such as the physical solvent sulfolane, having relatively low volatility. Such columns are employed in aromatic hydrocarbon extraction processes for the recovery of purified C | 10-06-2011 |
| 20120073951 | METHODS AND EXTRACTION UNITS EMPLOYING VAPOR DRAW COMPOSITIONAL ANALYSIS - Embodiments of extraction unit and an analysis method are provided. In one embodiment, the analysis method includes the steps of providing a feed stream and a species-selective solvent to the distillation column, drawing a vapor sample from the distillation column, condensing the vapor sample, and analyzing at least a portion of the condensed vapor sample. | 03-29-2012 |
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| 20090088144 | MANAGING CONTACT STATUS UPDATES IN A PRESENCE MANAGEMENT SYSTEM - Managing online presence information for contacts involves propagating contact status updates from a contact to an interested identity. A contact list may include hundreds to thousands of contacts for an identity. When one of those contacts changes presence status (e.g., from available to do-not-disturb), the change is propagated from a device of the contact, to a server, to one or more devices of the identity maintaining the contact list. Although that single change or status update consumes a small amount of resources, status updates for a larger number of contacts occurring at various times consumes a more substantial amount of resources, including bandwidth and power. Although power consumption may not be a factor for a desktop computer, power consumption for large scale and/or frequent status updates on devices with more limited power sources (e.g., mobile phones, personal data assistants, etc.) may be a significant factor. | 04-02-2009 |
| 20090089308 | MAPPING ONLINE CONTACT INFORMATION INTO A CONTACTS LIST - A presence management system may communicate contact information with mapped values. Contact information may be stored in a hierarchical, extensible structure (“hierarchical extensible contact structure”). Devices in a presence management system utilize a mapping scheme to map contact values (e.g., e-mail address, phone number, etc.) to the appropriate field of the hierarchical extensible contact structure. When devices in the presence management system communicate information for thousands of contacts, employing mapped values to navigate the hierarchical extensible contact structure reduces the size of the messages, thus reducing resource consumption (e.g., bandwidth), particularly on the scale of an enterprise. | 04-02-2009 |
| 20090089804 | PRIORITIZATION FOR ONLINE CONTACT STATUS UPDATES - Communicating information about a contact, such as presence status, may be regulated in accordance with priority values associated with contacts. Various parameters about contacts with respect to a particular environment may be collected and utilized to assign priority values to the contacts. Flow of information about the contacts is regulated based on the assigned priority values. Information about contacts with higher priority values may be communicated more frequently to client devices from one or more servers than those contacts with lower priority values. In addition, information about contacts associated with priority values that satisfy one or more criteria may be prefetched from a server to a client device. | 04-02-2009 |
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| 20090156545 | Substituted Phosphate Esters of Nucleoside Phosphonates - Compounds and compositions are provided for treatment, prevention, or amelioration of a variety of medical disorders associated with viral infections and/or cell proliferation. The compounds provided herein are obtained by attaching the phosphonate nucleoside of interest to alkyloxyalkyl-phosphate or alkyl-phosphate in a phosphate-phosphono anhydride linkage to provide a modified nucleoside phosphonate drug. | 06-18-2009 |
| 20090215726 | Phosphono-Pent-2-en-1-yl Nucleosides and Analogs - Compounds and compositions are provided for treatment, prevention, or amelioration of a variety of medical disorders associated with viral infections and/or cell proliferation. The compounds provided herein are 5-phosphono-pent-2-en-1-yl nucleosides and esters thereof. | 08-27-2009 |
| 20100173870 | Phosphonate Compounds - The present invention relates to phosphonate compounds, compositions containing them, processes for obtaining them, and their use for treating a variety of medical disorders, e.g., osteoporosis and other disorders of bone metabolism, cancer, viral infections, and the like. | 07-08-2010 |
| 20100249056 | Metabolically Stable Alkoxyalkyl Esters of Antiviral or Antiproliferative Phosphonates, Nucleoside Phosphonates and Nucleoside Phosphates - The present invention relates to phosphonate, nucleoside phosphonate or nucleoside phosphate compounds, compositions containing them, processes for obtaining them, and their use in treating a variety of medical disorders, in particular viral infections, cancers and the like. | 09-30-2010 |
| 20120058975 | Phosphonate Compounds - The present invention relates to phosphonate compounds, compositions containing them, processes for obtaining them, and their use for treating a variety of medical disorders, e.g., osteoporosis and other disorders of bone metabolism, cancer, viral infections, and the like. | 03-08-2012 |
