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| Number | Title | Issue Date |
| 7437891 | Recovery and purification of ethylene A process for the recovery and purification of ethylene and optionally propylene from a stream containing lighter and heavier components that employs an ethylene distributor column and a partially thermally coupled distributed distillation system. ... | 10/21/2008 |
| 7320745 | Energy efficient method for exothermic reactions An energy efficient process scheme for a highly exothermic reaction-distillation system in which the reactor is external to the distillation column and the feed to the reactor is a mixture of at least one liquid product stream from the distillation column with or wi... | 01/22/2008 |
| 7285697 | Reduction of total sulfur in crude and condensate cracking A process for cracking hydrocarbon feedstock comprising at least one sulfur-containing compound comprising: heating the feedstock and a peroxide-containing compound, mixing the heated feedstock and peroxide-containing compound with a fluid and/or a primary dilution ... | 10/23/2007 |
| 7204928 | Process and apparatus for the fractional distillation of crude oil A process for the fractional distillation of crude oil, which comprises the steps of: feeding a continuous current of crude oil at 310–400° C. into a turbomixer comprising a tubular cylindrical body (1) provided with a rotor (9) formed with helicall... | 04/17/2007 |
| 6723231 | Propene recovery Process to separate propene from gaseous fluid catalytic cracking products by performing the following steps: a) separating a feed mixture comprising the gaseous products, propene and other saturated and unsaturated hydrocarbons obtained in a fluid catalytic crackin... | 04/20/2004 |
| 6605208 | Process for reduction of emissions in asphalt production A process and apparatus are disclosed that relate generally to a process for reducing harmful or unwanted emissions during the production of asphalt, such as blue smoke. The process includes the introduction of a pump around of the wax oil fraction for re... | 08/12/2003 |
| 6483002 | Integrated fractional distillation for adsorptive separation process Construction and operational costs of simulated moving bed adsorptive separation process units are reduced by recovering desorbent from both the extract and raffinate streams of the process in a single column. Both streams are fractionated to recover deso... | 11/19/2002 |
| 6395951 | Adsorptive separation product recovery by fractional distillation Construction and operational costs of recovering the extract or raffinate product of a simulated moving bed adsorptive separation process units are reduced by employing a dividing wall column to perform the separation. The raffinate or extract stream is p... | 05/28/2002 |
| 6348637 | Multifunction fractionation column for adsorptive separation processes Construction and operational costs of simulated moving bed adsorptive separation process units are reduced by recovering desorbent from both the extract and raffinate streams of the process in a single column. Both streams are fractionated in the same col... | 02/19/2002 |
| 6278035 | Process for C2 recovery An improved process for separating a hydrocarbon bearing feed gas containing methane and lighter, C2 (ethylene and/or ethane), and heavier components into a fraction containing predominantly methane and lighter components and a fraction contain... | 08/21/2001 |
| 5456823 | Process for dehydration and/or desalination and for simultaneous fractionation of a petroleum deposit effluent A process for the dehydration and/or desalination and simultaneous fractionation of a petroleum deposit effluent containing oil, associated gas and water which can be saline, which process comprises: (a) at least one step for separating the liquid and gaseous ... | 10/10/1995 |
| 5389242 | Process for the fractionation of oil and gas on a petroleum deposit effluent A description is given of a process for the fractionation of oil and gas on a petroleum deposit effluent, including: (a) a stage wherein the liquid and gaseous phases are separated at the gas evacuation pressure P1, producing a gaseous fraction G1, on the one ... | 02/14/1995 |
| 5326927 | Recovery of a useful polymerizable fraction In a process for the recovery of a polymerizable useful fraction, consisting of styrene, methylstyrenes, vinyltoluenes, indene, methylindenes and fractions whose boiling points are between styrene and methylindenes, from the crack gases of a steam cracker... | 07/05/1994 |
| 5252201 | Fractionating process and fractionator An improved fractionating process is provided wherein a liquid stream is withdrawn from the separation zone of the fractionator, is cooled and is recycled to the fractionator at a location below the location of withdrawal of the liquid stream. An improved... | 10/12/1993 |
| 5180474 | Method of separation of aromates by extractive distillation A method of separation of aromates from hydrocarbon mixtures by extractive distillation with a selective solvent, includes introducing a hydrocarbon mixture into the extractive distillation column, distillating out non-aromate components of the introduced... | 01/19/1993 |
| 5167773 | Distillation tower and sidestream stripper therefor A distillation tower (1) has a plurality of liquid sidestream lines (5, 6, 7) and a multi-stage sidestream stripper (13) which includes a respective stripping section (14, 15, 16) for each sidestream line housed in a common, upright, cylindrical shell (28... | 12/01/1992 |
| 5139651 | Aromatic extraction process using mixed polyalkylene glycol/glycol ether solvents Processes are provided for the recovery of aromatic hydrocarbons from feeds comprising mixtures of aromatic and non-aromatic hydrocarbons using a mixed aromatic extraction solvent at extraction temperature of less than 250° F. The mixed extraction solven... | 08/18/1992 |
| 5116485 | Apparatus and method for recovering diesel-quality fuel from produced crude oil An apparatus and process for recovering a diesel-quality fuel from produced crude oil is described. The diesel-quality fuel is produced by flashing the crude feedstock at high temperatures and recovering the diesel quality fuel as a liquid from a refluxin... | 05/26/1992 |
| 5105041 | Effluent separation method for aromatic hydrocarbon alkylation process A process for the production of alkylaromatic hydrocarbons uses a working fluid to reduce the costs of separating an unreacted aromatic feed substrate from aromatic hydrocarbon products. Unreacted aromatic substrate is combined with a light hydrocarbon, s... | 04/14/1992 |
| 5031754 | Method of working up an overhead product of an extractive distillation of a hydrocarbon mixture and apparatus for same A hydrocarbon material of the starting product is separated in an extractive distillation column in which an N-substituted morpholine whose substituents do not have more than seven carbon atoms is used as a selective solvent. The overhead product comes do... | 07/16/1991 |
| 5022981 | Aromatic extraction process using mixed polyalkylene glycol/glycol ether solvents Processes are provided for the recovery of aromatic hydrocarbons from feeds comprising mixtures of aromatic and non-aromatic hydrocarbons using a mixed aromatic extraction solvent at extraction temperature of less than 250° F. The mixed extraction solven... | 06/11/1991 |
| 4994168 | Lube oil product stripping The quality and yield of dewaxed, hydrotreated lube oil base stocks are improved by reducing the top temperature in the hydrotreated lube stripper so as to increase the proportion of heavy kerosene components in the lube oil base stock. The separation sys... | 02/19/1991 |
| 4954247 | Process for separating hydrocarbons A process for improving the separation of a hydrocarbonaceous oil is provided, in which the oil is separated into fractions in an atmospheric distillation zone. The heavy bottoms fraction (atmospheric residuum) is split into two streams. One stream is pas... | 09/04/1990 |
| 4952305 | Process and apparatus for the separation of hydrocarbons In a process for obtaining higher-boiling hydrocarbons from a gaseous stream, the latter is first partially condensed and the thus-formed liquid fraction is introduced into a rectification process whereas the gaseous fraction is scrubbed in a scrubbing co... | 08/28/1990 |
| 4941967 | Process for re-refining spent lubeoils Process for re-refining spent lubeoils, wherein a lubeoil freed from water and sludge forming impurities is subjected to a pre-destillation at reduced pressure and with a short residence time of the oil in the distillation column and is subsequently subje... | 07/17/1990 |
| 4925535 | Process for the production of an aromate concentrate suitable for use as blending component for gasification fuel The process for production of an aromate concentrate for use as a blending component for gasification fuel includes subjecting another feed hydrocarbon mixture to an extractive distillation using N-substituted morpholines as selective solvent in a extract... | 05/15/1990 |
| 4919794 | Process for separating hydrocarbons A process for improving the separation of a hydrocarbon mixture is provided in which the hydrocarbon mixture is separated into fractions in a distillation zone. A liquid fraction and a portion of the vapor phase fraction are removed from the distillation ... | 04/24/1990 |
| 4894145 | Automatic control of feedstock vacuum towers In a fractional distillation tower which is divided into a plurality of sections by total drawoff trays, and wherein at least one fraction is withdrawn from each section. The cut point temperature between fractions is determined based on the partial press... | 01/16/1990 |
| 4885424 | Effluent separation method for aromatic hydrocarbon alkylation process A process for the production of alkylaromatic hydrocarbons uses a light hydrocarbon recycle to reduce the costs of separating an unreacted aromatic feed substrate from aromatic hydrocarbon products. Unreacted aromatic substrate is combined with a light hy... | 12/05/1989 |
| 4859310 | Catalytic cracking of whole crude oil An effective, economical catalytic cracking process is provided to produce quality gasoline and other hydrocarbons from whole crude oil. The catalytic cracking process is operable and particularly useful during maintenance or shutdown of associated pipest... | 08/22/1989 |
| 4832830 | Method for olefinic separation A process and apparatus for separating selected C4 olefinic products from combinations thereof with lower boiling point compounds comprises partially condensing a stream containing said products and compounds, atmospherically separating said pa... | 05/23/1989 |
| 4822480 | Hydrocarbon product stripping Improved product stripping in a catalytic hydrodesulfurization (CHD) product stream is obtained by employing off-gas from the unit as a stripping medium. The compressed off-gas is introduced into the stripper below the stripper feed level. The stripper ma... | 04/18/1989 |
| 4776948 | Fractionation method with quench liquid recycle Method and apparatus for fractionating a hot vaporous hydrocarbon feed from a fluid catalytic cracking reactor wherein the hot vaporous feed is introduced into a fractionator zone near one end thereof and liquid is removed from a liquid collection zone an... | 10/11/1988 |
| 4702819 | Process for separation of hydrocarbon mixtures A process for separating gaseous or liquid hydrocarbons in first and second fractionation zones wherein the first fractionation zone employs a side reboiler discharging below the side draw point. A vapor sidestream is removed from the first fractionator b... | 10/27/1987 |
| 4673488 | Hydrocarbon-conversion process with fractionator overhead vapor recycle An improved method for processing the effluent of a hydrocarbon conversion zone. The invention is particularly useful in a catalytic reforming reaction, wherein practice of the invention results in an increased recovery of butane and propane. The effluent... | 06/16/1987 |
| 4664784 | Method and apparatus for fractionating hydrocarbon crudes A method and apparatus are provided for distillation of hydrocarbon oil subject to coking threshold temperature limits. A hydrocarbon oil is heated to a first predetermined maximum temperature above which coking is likely to occur. The heated hydrocarbon ... | 05/12/1987 |
| 4664786 | Process for the separation of hydrocarbons from a mixed feedstock In a steam distillation process for the recovery of aromatic hydrocarbons wherein there is (i) a primary flash zone at the top of the distillation zone in which rich solvent is flashed and/or (ii) provision for the removal of side cut distillate vapors fr... | 05/12/1987 |
| 4662995 | Distillation process A method and apparatus for improving the separation of a distillation system comprising a main distillation zone and at least one sidestream separation zone is described. The method comprises returning vapor separated in the sidestream separation zone to ... | 05/05/1987 |
| 4606816 | Method and apparatus for multi-component fractionation Fractionation method and apparatus are provided, wherein heavy product is withdrawn from a first fractionator and introduced into a second fractionator, which operates in a predetermined moderate pressure range. The withdrawn heavy product is separated in... | 08/19/1986 |
| 4587370 | Aromatic hydrocarbon alkylation process product recovery method A fractionation method is disclosed for the recovery of product alkylaromatic hydrocarbons produced by the alkylation of aromatic hydrocarbons. Three fractionation columns are employed in series. Aromatic feed hydrocarbons are recycled from the overhead o... | 05/06/1986 |
