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| Number | Title | Issue Date |
| 7405338 | Dehydrogenation reactions in narrow reaction chambers and integrated reactors Methods of dehydrogenating hydrocarbons to yield unsaturated compounds are described. Reactor configurations useful for dehydrogenation are also described. Hydrocarbons can dehydrogenationed, for relatively long periods of time-on-stream, in a reaction chamber havin... | 07/29/2008 |
| 7381309 | Apparatus for prewashing a hydrocarbon stream containing hydrogen sulfide Disclosed is an apparatus for extracting sulfur compounds from a hydrocarbon stream. A prewash section for converting hydrogen sulfide to sodium sulfide by reaction with an alkali such as caustic prepares the hydrocarbon stream for extraction. Spent alkali is contin... | 06/03/2008 |
| 7241376 | Method for passing a fluid through a moving bed of particles A process for contacting a bed of particulate material, usually catalyst, with a transverse flow of fluid is disclosed. The particulate material moves or is prevented from not moving, while the fluid passes through the bed at a rate greater than the stagnant bed pin... | 07/10/2007 |
| 7034196 | Method and apparatus for reducing decomposition byproducts in a methanol to olefin reactor system Disclosed is a method and apparatus for reducing the amount of metal catalyzed side-reaction byproducts formed in the feed vaporization and introduction system of a methanol to olefin reactor system by monitoring and/or maintaining the temperature of at least a port... | 04/25/2006 |
| 6890619 | Optical systems and refractive index-matching compositions Optical systems such as, for example, optical switches, are disclosed comprising a solid component and a refractive index-matching liquid composition interfaced with the solid component. The liquid composition has a refractive-index that is substantially equal to th... | 05/10/2005 |
| 6830676 | Coking and carburization resistant iron aluminides for hydrocarbon cracking A cracking tube includes a lining of a fouling resistant and corrosion resistant iron aluminide alloy. The iron aluminide alloy can include 14-32 wt. % Al, at least 2 vol. % transition metal oxides, 0.003 to 0.020 wt. % B, 0.2 to 2.0 wt. % Mo, 0.05 to 1.0 wt. % Zr, ... | 12/14/2004 |
| 6824672 | Use of austenitic stainless steels in applications requiring anti-coking properties An austenitic stainless steel with a composition comprising: at most 0.15% of C; 2% to 10% of Mn; at most 2% of Ni; at most 4% of Cu; 0.1% to 0.4% of N; ... | 11/30/2004 |
| 6814857 | Method for passing a fluid through a moving bed of particles A process for contacting a bed of particulate material, usually catalyst, with a transverse flow of fluid is disclosed. The particulate material moves or is prevented from not moving, while the fluid passes through the bed at a rate greater than the stagnant bed pin... | 11/09/2004 |
| 6737556 | Method and system for reducing decomposition byproducts in a methanol to olefin reactor system Disclosed is a method and system for reducing the formation of metal catalyzed side-reaction byproducts formed in the feed vaporization and introduction system of a methanol to olefin reactor system by forming and/or coating one or more of the heating devices, feed ... | 05/18/2004 |
| 6657097 | Fluidized bed reactor Disclosed is a fluidized bed reactor wherein the average cross-sectional area occupied by a cooling coil, a dummy pipe and/or a cyclone leg is 10% or more of the average cross-sectional area of said reactor in a dense-phase fluidized catalyst bed region. ... | 12/02/2003 |
| 6475647 | Protective coating system for high temperature stainless steel A method for protecting high temperature stainless steel from coking and corrosion at elevated temperatures in corrosive environments, such as during ethylene production by pyrolysis of hydrocarbons or the reduction of oxide ores, by coating the stainless... | 11/05/2002 |
| 6312652 | Ceramic dip pipe and tube reactor for ethylene production A furnace construction for cracking of saturated hydrocarbon feed stocks to olefinic product mixtures, wherein the reaction lines of such furnace are fabricated of a ceramic refractory feed inlet pipe coaxially located with a ceramic refractory tube to de... | 11/06/2001 |
| 6190536 | Catalytic cracking process Processes and apparatus for providing improved catalytic cracking, specifically improved recovery of olefins, LPG or hydrogen from catalytic crackers. The improvement is achieved by passing part of the wet gas stream across membranes selective in favor of... | 02/20/2001 |
| 6027635 | Continuous pyrolysis and decoking process for use in the production of acetylene A process for the pyrolysis of hydrocarbons in a reactor with at least two rows which are parallel to each other in which at least one row is supplied with a non hydrocarbon fluid containing steam to decoke the reaction zone at least in part. At least one... | 02/22/2000 |
| 5944981 | Pyrolysis furnace tubes An improved method for cracking a hydrocarbon feedstock comprising passing the feedstock through furnace tubes at high temperatures. The improvement comprises tubes comprised of a nickel-cobalt alloy containing: nickel; 27.0-33.0 weight percent cobalt; 26... | 08/31/1999 |
| 5847251 | Multibed transalkylator and process A transalkylation reactor having a plurality of catalyst beds with individual feed points for each bed for converting poly alkylated benzene, typically products from a alkylation process, to mono alkylated benzene. Only so many of the catalyst beds are us... | 12/08/1998 |
| 5600051 | Enhancing olefin yield from cracking An improved method of thermally cracking hydrocarbons to produce olefin wherein a gaseous stream containing hydrocarbons is passed through a heated metal tube in a pyrolysis furnace, the improvement comprising enhancing the olefin yield by exposing the ga... | 02/04/1997 |
| 5371052 | Process for recovering boron trifluoride There is provided a process for recovering boron trifluoride catalyst from an oligomerization mixture, which comprises introducing an oligomerization mixture containing catalyst comprising boron trifluoride and a complex of boron trifluoride and cocatalys... | 12/06/1994 |
| 5259958 | Hydrocarbon extractor A hydrocarbon extractor, intended to be disposed above a tank (10) containing a mixture of a liquid and a liquid hydrocarbon, comprises a belt (16) made of an oleophilic material which is adapted to be immersed in the mixture and two oleophilic rollers (2... | 11/09/1993 |
| 5202517 | Process for production of ethylene from ethane An apparatus and system for the dehydrogenation of ethane to produce ethylene and hydrogen through the use of a catalytic ceramic membrane having selective permeability, thus permitting separation of hydrogen from the reaction zone which causes further de... | 04/13/1993 |
| 5095167 | Isoparaffin:olefin alkylation process The present invention provides a process and apparatus for alkylating an isoparaffin with an olefin which decreases the required catalyst inventory while improving alkylate quality by internally admixing unreacted isoparaffin and alkylate product with the... | 03/10/1992 |
| 4929798 | Pseudoadiabatic reactor for exothermal catalytic conversions A multitubular catalytic reactor for exothermal catalytic reactions comprises a bundle of parallel tubes all of the same length and a catalyst within the tubes. The tube bundle has an inlet side and an outlet side. Devices are provided for introducing sep... | 05/29/1990 |
| 4885421 | Multistage reactor system for production of fuels An integrated reactor system for conversion of methanol to ether-containing high octane gasoline and distillate. Methanol is converted to olefins in the presence of zeolite MTO catalyst. C4 and C5 olefin fraction is converted to MTBE... | 12/05/1989 |
| 4857667 | System for conversion of crude oxygenate to gasoline with feedstock extraction Apparatus for converting crude aqueous oxygenate feedstock, such methanol or the like, to liquid hydrocarbons in contact with a medium pore shape selective crystalline acid zeolite catalyst, such as HZSM-5. In a preferred embodiment, the novel technique c... | 08/15/1989 |
| 4132743 | Reduction of metal surface-initiated cracking in dehydrogenation reactors Low yield thermal cracking of a hydrocarbon such as ethylbenzene caused by contact with active metal surfaces in a catalytic dehydrogenation reactor is reduced by coating the metal surfaces, particularly those in the feed inlet end, with a thin layer of a... | 01/02/1979 |
| 3949011 | Method of preparing cycloolefines The method of preparing cycloolefines consists in that, according to the invention, the corresponding cyclodienes are hydrogenated with hydrogen in the presence of a catalyst which is an alloy of palladium with ruthenium or rhodium, the ruthenium content ... | 04/06/1976 |
| 3931345 | Hydrogenation and hydrodealkylation process Hydrogenation and hydrodealkylation catalysts of aromatic hydrocarbons comprising a palladium alloy with molybdenum, containing from 0.1 to 30 percent by weight of molybdenum. The catalyst can be manufactured in the form of powders, blacks, membranes, foi... | 01/06/1976 |
