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| Number | Title | Issue Date |
| 8008534 | Liquid phase hydroprocessing with temperature management A method of hydroprocessing hydrocarbons is provided using a substantially liquid-phase reactor having first and second catalyst beds with a heat transfer section positioned therebetween. The first and second catalyst beds and the heat transfer section are combined ... | 08/30/2011 |
| 7193120 | Colloid-catalyzed gas transfer in supercritical phases The invention relates to a process for hydrogen transfer to chemical compounds, wherein hydrogen transfer is carried out in a supercritical or subcritical phase using stabilized and dispersed metal particles. The invention further provides for the use of metal collo... | 03/20/2007 |
| 6905576 | Method and system for producing silane This invention relates to a continuous process for the preparation of silane by catalytic disproportionation of trichlorosilane in a reactive/distillative reaction zone having a catalyst bed of catalytically active solid. ... | 06/14/2005 |
| 6822128 | Flow control in a three-phase monolithic catalyst reactor A method is disclosed for maintaining a volumetric gas to liquid ratio in a segmented gas/liquid flow along a reactor of monolithic catalyst beds in series. The present invention includes the steps of: initiating the segmented gas/liquid flow at a first end of the r... | 11/23/2004 |
| 6365791 | Process for converting hydrocarbons by treatment in a distillation zone comprising extracting a hydrocarbon cut as a side stream, associated with a reaction zone, and its use for hydrogenating benzene The invention provides a process for converting hydrocarbons in which said feed is treated in a distillation zone associated with a reaction zone, the feed for the reaction zone being drawn off at the height of at least one draw-off level, the effluent fr... | 04/02/2002 |
| 6238549 | Process for converting hydrocarbons by treatment in a distillation zone associated with a reaction zone, comprising re-contacting a vapor distillate with the feed, and its use for hydrogenating benzine The invention concerns a process for converting a hydrocarbon feed in which said feed is treated in a distillation zone producing an overhead vapor distillate and a bottom effluent, associated with an at least partially external reaction zone comprising a... | 05/29/2001 |
| 6194623 | Hydrogenation of organic compounds with the use of the NEMCA effect A process is provided for the selective hydrogenation of at least one organic compound having at least one unsaturated group, by bringing the at least one organic compound into contact with a hydrogen-containing gas in the presence of a catalyst, wherein ... | 02/27/2001 |
| 6156933 | Supercritical hydrogenation Process for the selective hydrogenation of alphatic or aromatic substrates under supercritical or near critical conditions. Hydrogenation is effected using a heterogeneous catalyst in a continuous flow reactor containing a supercritical or near critical r... | 12/05/2000 |
| 6118034 | Process for the selective hydrogenation of dienes in reformate flows In the process for the selective hydrogenation of dienes in diene-containing feed streams, a diene-containing feed stream is hydrogenated over a nickel-containing precipitated catalyst at from 40 to 100° C., a pressure of from 3 to 20 bar and a WHSV (wei... | 09/12/2000 |
| 6084141 | Hydrogenation process comprising a catalytic distillation zone comprising a reaction zone with distribution of hydrogen The invention concerns a reactive distillation process comprising a distillation zone, associated with a reaction zone which is at least in part internal to said distillation zone and comprises at least one catalytic bed in which the feed is transformed i... | 07/04/2000 |
| 6037510 | Catalytic gas-phase hydrogenation of olefins The gas-phase hydrogenation of a feed containing at least 50% by weight of at least one C6 -C20 -olefin with a gas containing at least hydrogen over a catalyst is carried out by a process in which the feed is introduced as a liquid i... | 03/14/2000 |
| 6011188 | Multi-bed selective hydrogenation of acetylenes Compensation for catalyst activity decline in multi-bed selective hydrogenation of acetylenes in the presence of olefins by providing inter-bed heating so that the product from the first bed is heated before it is fed to the second bed, and the temperatur... | 01/04/2000 |
| 5962755 | Process for the isomerization of benzene containing feed streams A process for saturating benzene in a light paraffin isomerization process can accommodate varying quantities of benzene through the incorporation of progressive steps that control temperatures in the isomerization zone while performing a majority of the ... | 10/05/1999 |
| 5817901 | Selective hydrogenation of hydrocarbon cuts containing monounsaturated and polyunsaturated hydrocarbons A process for the selective hydrogenation of a fraction of hydrocarbons containing 2 to 20 carbon atoms and comprising monounsaturated olefinic hydrocarbons and/or aromatic compounds and at least one polyunsaturated hydrocarbon from the group formed by ac... | 10/06/1998 |
| 5763713 | Process for the isomerization of benzene containing feed streams A process for saturating benzene in a light paraffin isomerization process can accommodate varying quantities of benzene through the incorporation of progressive steps that control temperatures in the isomerization zone while performing a majority of the ... | 06/09/1998 |
| 5731485 | Method of controlling a heater using heat flux ratios An improved method of continuously controlling a multi-zone heater used in a chemical process has been developed. Each zone of the multi-zone heater has an ideal heat flux, FI, and an actual heat flux, FA, and the difference between the heat flux ratios, ... | 03/24/1998 |
| 4617110 | Control of a hydrofining process for hydrocarbon-containing feed streams which process employs a hydrodemetallization reactor in series with a hydrodesulfurization reactor In a two-stage hydrofining process, hydrogen is utilized as a quench fluid to reduce the temperature of the effluent withdrawn from the hydrodemetallization stage prior to providing such effluent to the hydrodesulfurization stage and the flow of such hydr... | 10/14/1986 |
| 4472264 | Process for converting solid carbonaceous materials to methane Process for converting solid carbonaceous materials to methane, comprising (a) converting the carbonaceous material by means of a reducing gas at 300°-500° C. to a semi-oily phase adapted to be pumped and atomized, (b) heating falling droplets of said s... | 09/18/1984 |
| 4367354 | Temperature control of a selective hydrogenation process In a selective hydrogenation process wherein at least two catalyst beds in series are utilized, the temperature of the feed stream flowing to the first catalyst bed and the temperature of the feed stream flowing from the first catalyst bed to the second c... | 01/04/1983 |
| 4345915 | Mixed feed evaporator In the preparation of the gaseous reactant feed to undergo a chemical reaction requiring the presence of steam, the efficiency of overall power utilization is improved by premixing the gaseous reactant feed with water and then heating to evaporate the wat... | 08/24/1982 |
| 4251674 | Method and apparatus for improving the selectivity of a process for hydrogenating acetylene to ethylene In an ethylene manufacturing process in which the effluent from the cracking furnaces is provided to an acetylene reactor to therein selectively hydrogenate acetylene to ethylene, method and apparatus is provided whereby methanol is injected into the crac... | 02/17/1981 |
| 4249908 | Temperature control of exothermic reactions A selective hydrogenation process wherein at least two catalyst beds in series is controlled by predicting the inlet temperature to the first catalyst bed in the series required to maintain the concentration of the component being selectively hydrogenated... | 02/10/1981 |
| 4249907 | Temperature control of exothermic reactions In a selective hydrogenation process wherein at least one catalyst bed is utilized, the temperature of the feed stream to the catalyst bed is controlled so as to maintain a desired reaction temperature in the catalyst bed. Primary control is based on an a... | 02/10/1981 |
| 4241230 | Control system for the selective hydrogenation of acetylene present in ethylene product streams Acetylene contained in an ethylene product stream in minor amounts is selectively hydrogenated to ethylene in the presence of suitable catalysts in a two stage converter having a primary reactor stage providing hydrogenation of a portion of the acetylene ... | 12/23/1980 |
| 4234314 | Guard-bed vapor bypass to overcome pressure drop in mixed-phase reactions In a mixed-phase hydrocarbon hydroprocessing catalytic reaction system, wherein a guard-bed of particulate matter is employed above one or more individual beds of catalyst particles, the adverse detrimental effects of excessive reaction zone pressure drop... | 11/18/1980 |
| 4132530 | Temperature control in exothermic/endothermic reaction systems Control of temperature increases (delta-T) through a reaction zone, in which both exothermic and endothermic reactions are effected, is achieved by sensing the inlet temperature of the charge stock, a highest temperature from a plurality of intermediate l... | 01/02/1979 |
| 4129606 | Temperature control of integrated fractionation column and reaction zone A hydrocarbon stream comprising C2 to C8 hydrocarbons is stripped at a high temperature to allow passage of the stripper bottoms stream into a reaction zone without further heating, and the effluent of the reaction zone is then heat ... | 12/12/1978 |
| 4032591 | Preparation of alpha-olefin oligomer synthetic lubricant An alpha-olefin oligomer synthetic lubricant having an improved viscosity-volatility relationship is prepared from an alpha-olefin such as 1-decene.... | 06/28/1977 |
| 3947509 | Method for preparation of hydrocarbon liquid polymers A method of effecting polymerization of olefins having 6 or more carbon atoms or mixtures of such olefins (hereinafter referred to as the feed olefin), to produce a hydrocarbon liquid polymer which comprises mixing a catalyst composed of aluminum chloride... | 03/30/1976 |
