| Patent application number | Description | Published |
|---|
| 20080306318 | Process for Producing Para-Xylene - A process for producing a PX-rich product comprises (a) separating a feedstock containing C | 12-11-2008 |
| 20090007782 | Hydrogen Management in Petrochemical Process Units - The management of hydrogen in hydrogen-containing streams associated with petrochemical process units wherein the hydrogen-containing stream is subjected rapid cycle pressure swing adsorption to increase the concentration of hydrogen therein. | 01-08-2009 |
| 20090057200 | Production of an upgraded stream from steam cracker tar by ultrafiltration - This invention relates to a process of producing an upgraded product stream from steam cracker tar feedstream suitable for use in refinery or chemical plant processes or for utilization in fuel oil sales or blending. This process utilizes an ultrafiltration process for separating the steam cracker tar constituents resulting in a high recovery, low-energy process with improved separation and product properties. | 03-05-2009 |
| 20090071332 | Management of Hydrogen in Hydorgen-Containing Streams from Hydrogen Sources - The use of rapid cycle pressure swing adsorption having a cycle time of less than 30 s for increasing the hydrogen concentration in hydrogen-containing steams, from a hydrogen source, such as a stream reforming unit. | 03-19-2009 |
| 20100152508 | Process for Producing Para-Xylene - A process for producing a PX-rich product, the process comprising: (a) providing a PX-depleted stream; (b) isomerizing at least a portion of the PX-depleted stream to produce an isomerized stream having a PX concentration greater than the PX-depleted stream and a benzene concentration of less than 1,000 ppm and a C | 06-17-2010 |
| 20110092755 | Production of Para-Xylene by the Methylation of Benzene and/or Toluene - In a process for the production of para-xylene, methanol is preheated to a first temperature, an aromatic feedstock comprising toluene and/or benzene is preheated to a second temperature and the preheated methanol and aromatic feedstocks are fed to a reactor at a first methanol to aromatic feedstock molar ratio. The preheated aromatic feedstock is contacted with the preheated methanol under alkylation conditions in the reactor in the presence of a catalyst so that the methanol reacts with the aromatic feedstock to produce an effluent comprising para-xylene. During the reaction, a temperature is measured within the reactor and is compared with a predetermined optimal temperature. The methanol to aromatic feedstock molar ratio is then adjusted in a manner to reduce any difference between the measured and predetermined optimal temperatures in the reactor. | 04-21-2011 |
| 20110263918 | Xylene Isomerization Process and Catalyst Therefor - The invention concerns a xylenes isomerization process for the production of equilibrium or near-equilibrium xylenes. The process utilizes a catalyst comprising HZSM-5 or MCM-49 and process conditions including a temperature of less than 295° C. and a pressure sufficient to maintain the xylenes in liquid phase. In embodiments, the process can be operated in a continuous mode with ppm levels of dissolved H | 10-27-2011 |
| 20110319688 | Paraxylene Production Process and Apparatus - The invention concerns a process for the production of paraxylene and an apparatus suitable for said process. The process separates the overhead from a xylenes re-run into a xylene-rich stream and a xylene-lean stream. The xylene-lean stream is isomerized under conditions such that the xylenes are in the liquid phase. | 12-29-2011 |
