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| Number | Title | Issue Date |
| 8007661 | Modified absorption recovery processing of FCC-produced light olefins Processing schemes and arrangements are provided arrangements are provided for the processing a heavy hydrocarbon feedstock via hydrocarbon cracking processing with selected hydrocarbon fractions being obtained via absorption-based product recovery while minimizing ... | 08/30/2011 |
| 7544284 | Process for the recovery of a hydrogen-rich gas and a stabilized liquid Process for the treatment of a hydrocarbon mixture that comprises hydrogen, in which the mixture is separated at pressure P1 into a liquid L1 and a gas G1 that is compressed under a pressure P2>2×P1; compressed gas G1** is ... | 06/09/2009 |
| 7132044 | Device that comprises recycling to a separator a liquid effluent that is obtained from an absorber and is mixed with a feedstock A device comprising at least one absorber, at least one cold separator from which is extracted a gaseous phase that feeds the absorber, at least one recycling to said cold separator of at least a portion of liquid effluent that is obtained from the absorber and whic... | 11/07/2006 |
| 7074323 | Use of low pressure distillate as absorber oil in a FCC recovery section A process for the recovery of gaseous products from the product mixture obtained by contacting a hydrocarbon feed with a catalyst in a fluid catalytic cracking process, wherein the liquid, obtained by separating the top product of main fractionators into gaseous and... | 07/11/2006 |
| 7060865 | Recovery of C4 olefins from a product stream comprising C4 olefins, dimethyl ether and C5+ hydrocarbons Disclosed is a process for removing DME from a stream containing C4 olefins. The process includes providing a first stream comprising C4 olefins, C5+ hydrocarbons, DME, and methanol. The first stream is separated into a second stream comprising the C4 olefins and th... | 06/13/2006 |
| 6740226 | Process for increasing hydrogen partial pressure in hydroprocessing processes In a hydrocracking unit, the flash gases from the high-pressure separator are fed to the bottom of an absorption zone where the entering gases are counter-currently contacted with a lean solvent. The lean solvent absorbs away the contained methane, ethane, propane, ... | 05/25/2004 |
| 6303022 | Method of gas stream purification having independent vapor and liquid refrigeration using a single refrigerant A process for recovering a hydrogen-rich gas and for increasing the recovery of liquid hydrocarbon products from a hydrocarbon conversion zone effluent by adsorption of the liquifiable products from a chilled gaseous stream with a chilled liquid stream is... | 10/16/2001 |
| 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 |
| 6190540 | Selective purging for hydroprocessing reactor loop A process for hydroprocessing a fluid stream containing at least hydrogen and hydrocarbons. The process uses a hydrocarbon-selective membrane to reduce the concentration of hydrocarbons and contaminants in the hydrogen stream recycled to the hydroprocessi... | 02/20/2001 |
| 6171472 | Selective purge for reactor recycle loop Processes and apparatus for providing improved contaminant removal and hydrogen reuse in reactors, particularly in refineries and petrochemical plants. The improved contaminant removal is achieved by selective purging, by passing gases in the reactor recy... | 01/09/2001 |
| 6165350 | Selective purge for catalytic reformer recycle loop Processes and apparatus for providing improved catalytic reforming, specifically improved recovery of reformate and hydrogen from catalytic reformers. The improvement is achieved by passing portions of the reactor effluent or streams derived from the reac... | 12/26/2000 |
| 6121505 | Process for synthesizing and purifying olefins comprising dehydrogenating a paraffin The present invention relates to a process for the production of olefins from a hydrocarbon cut, comprising a step for separating at least one paraffin contained in the hydrocarbon cut, a step for dehydrogenating the paraffin and a step for purifying the ... | 09/19/2000 |
| 5965014 | Method of gas stream purification having independent vapor and liquid refrigeration using a single refrigerant A process for recovering a hydrogen-rich gas and for increasing the recovery of liquid hydrocarbon products from a hydrocarbon conversion zone effluent by adsorption of the liquifiable products from a chilled gaseous stream with a chilled liquid stream is... | 10/12/1999 |
| 5858206 | Process for improved water wash in FCC gas concentration units Wash water is used to remove impurities such as hydrogen sulfide, ammonia, and hydrogen cyanide from light hydrocarbons and gases derived from refinery fluid catalytic cracking operations. The present invention is a process of low pressure recirculation o... | 01/12/1999 |
| 5414168 | Absorption and cold separation process for recovering purified hydrogen from a catalytic dehydrogenation zone effluent Purified hydrogen is recovered from the effluent of a catalytic dehydrogenation zone using an integrated cold absorption process. The effluent, which contains olefinic hydrocarbons and hydrogen is compressed, cooled and contacted with a liquid absorbent. ... | 05/09/1995 |
| 5360533 | Direct dry gas recovery from FCC reactor A FCC product recovery section operates at greater efficiency by recovering separate riser product streams and reactor product streams and quenching and absorbing lighter, more valuable hydrocarbon products from the reactor product stream in separate quen... | 11/01/1994 |
| 5332492 | PSA process for improving the purity of hydrogen gas and recovery of liquefiable hydrocarbons from hydrocarbonaceous effluent streams A process for recovering hydrogen-rich gases and increasing the recovery of liquid hydrocarbon products from a hydrocarbon conversion zone effluent is improved by a particular arrangement of a refrigeration zone, a pressure swing adsorption (PSA) zone, an... | 07/26/1994 |
| 5238555 | Process for purifying a hydrogen gas and recovering liquifiable hydrocarbons from hydrocarbonaceous effluent streams A process for recovering hydrogen-rich gases and increasing the recovery of liquid hydrocarbon products from a hydrocarbon conversion zone effluent is improved by a particular arrangement of two refrigeration zones and an absorption vessel.... | 08/24/1993 |
| 5178751 | Two-stage process for purifying a hydrogen gas and recovering liquifiable hydrocarbons from hydrocarbonaceous effluent streams A process for recovering hydrogen-rich gases and increasing the recovery of liquid hydrocarbon products from a hydrocarbon conversion zone effluent is improved by a particular arrangement of a refrigeration zone and two separation zones.... | 01/12/1993 |
| 5074989 | Process for the separation of fine catalyst particles for a hydrocarbon feedstock by filtration through mineral barries and a filtration loop This invention relates to a process for the separation of fine catalyst particles from a hydrocarbon feedstock coming from a catalytic cracking unit by filtration through mineral barriers and a filtration loop. The process consists of filtering the feedstock t... | 12/24/1991 |
| 4840721 | Process for treating a temperature-sensitive hydrocarbonaceous stream containing a non-distillable component to produce a hydrogenated distillable hydrocarbonaceous product A process for treating a temperature-sensitive hydrocarbonaceous stream containing a non-distillable component to produce a hydrogenated distillable hydrocarbonaceous product and a heavy product comprising the non-distillable component while minimizing th... | 06/20/1989 |
| 4793915 | Short contact time fluid catalytic cracking process A process and apparatus for fluid catalytic cracking (FCC) of a hydrocarbon feed. The process and apparatus includes a riser which upwardly discharges into a deflector baffle located within a stripping vessel. The stripping vessel is located within a dise... | 12/27/1988 |
| 4743356 | Increasing resid hydrotreating conversion Resid hydrotreating conversion of resid can be substantially increased by decreasing the feed gas rate and simultaneously increasing the concentration of hydrogen in the feed gases. Hydrogen purity can be increased by increasing the flow rate of lean spon... | 05/10/1988 |
| 4702818 | Process for recovering heat of a tar-containing high-temperature gas A process for recovering heat from a tar-containing gas while simultaneously cooling the gas in a 3-stage cooling step by (1) directing a tar-containing gas through a jet cooler comprising a bed of solid particles so that the gas contacts the solid partic... | 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 |
| 4483766 | Process for catalytic reforming An improved catalytic reforming process is disclosed wherein hydrogen and light hydrocarbons generated in the catalytic reaction zone are passed to a hydrogen production/purification zone and are reacted and processed therein to produce substantially pure... | 11/20/1984 |
| 4431529 | Power recovery in gas concentration units An absorption process is disclosed for the recovery of normally liquid hydrocarbons from a gas stream. The process is useful in recovering hydrocarbons from the gas stream discharged by the main fractionation column of a fluidized catalytic cracking unit.... | 02/14/1984 |
| 4431521 | Benzene recovery process A process is disclosed for improving the recovery of benzene from a reforming process by adding to the reformer effluent a heavy oil, then recovering the benzene in a flash drum.... | 02/14/1984 |
| 4374726 | Separation of hydrogen from a catalytic reforming zone effluent stream A process for the catalytic reforming of a hydrocarbonaceous feedstock at reforming conditions including a pressure of from about 50 to about 250 psig. is disclosed. A portion of the hydrogen-rich vapor phase recovered from the reforming zone effluent at ... | 02/22/1983 |
| 4364820 | Recovery of C3 + hydrocarbon conversion products and net excess hydrogen in a catalytic reforming process This invention relates to a hydrocarbon conversion process effected in the presence of hydrogen, especially a hydrogen-producing hydrocarbon conversion process. More particularly, this invention relates to the catalytic reforming of a naphtha feedstock, a... | 12/21/1982 |
| 4333817 | Separation of normally gaseous hydrocarbons from a catalytic reforming effluent and recovery of purified hydrogen A process for the catalytic reforming of a hydrocarbonaceous feedstock, preferably to produce high quality gasoline boiling range products, is disclosed. Relatively impure hydrogen is separated from the reforming zone effluent, compressed, and recontacted... | 06/08/1982 |
| 4333820 | Recovery of normally gaseous hydrocarbons from net excess hydrogen in a catalytic reforming process A process is disclosed for the catalytic reforming of hydrocarbons in the presence of hydrogen, preferably to produce high quality gasoline boiling range products. An improved recovery of normally gaseous hydrocarbons from the net excess hydrogen is reali... | 06/08/1982 |
| 4333819 | Separation and recovery of hydrogen and normally gaseous hydrocarbons from net excess hydrogen from a catalytic reforming process A process is disclosed for the catalytic reforming of hydrocarbons in the presence of hydrogen, preferably to produce high quality gasoline boiling range products. An improved recovery of normally gaseous hydrocarbons from the net excess hydrogen is reali... | 06/08/1982 |
| 4333818 | Separation of normally gaseous hydrocarbons from a catalytic reforming effluent and recovery of purified hydrogen A process for the catalytic reforming of a hydrocarbonaceous feedstock, preferably to produce high quality gasoline boiling range products, is disclosed. Relatively impure hydrogen is separated from the reforming zone effluent, compressed, and recontacted... | 06/08/1982 |
| 4225415 | Recovering hydrocarbons from hydrocarbon-containing vapors Values are recovered from a hydrocarbon-containing vapor by contacting the vapor with quench liquid consisting essentially of hydrocarbons to form a condensate and a vapor residue, the condensate and quench fluid forming a combined liquid stream. The comb... | 09/30/1980 |
| 4212726 | Method for increasing the purity of hydrogen recycle gas Disclosed is a process for hydrotreating hydrocarbon feedstocks and for recovering from the resulting effluent stream selected hydrocarbon fractions, and hydrogen for recycle and other uses with improved purity. Relatively pure hydrogen is provided by sep... | 07/15/1980 |
| 4188796 | Method of and apparatus for the cooling (quenching) of cracking gases Cracking gases are cooled by spraying them through a multiplicity of orifices into a cooling oil bath below the surface thereof.... | 02/19/1980 |
| 4159937 | Mixed-phase reaction product effluent separation process Multiple-stage separation of a mixed-phase product effluent resulting from the hydrocracking and/or hydrorefining conversion of a hydrocarbonaceous charge stock. Reaction product effluent is initially separated in a high temperature, high pressure first s... | 07/03/1979 |
| 4159935 | Conversion of hydrocarbonaceous black oils Hydrocarbonaceous black oils are converted into lower-boiling hydrocarbons via a process which utilizes two separate catalytic reactor systems interconnected by way of a multiple-stage separation facility. Fresh feed charge stock is reacted in the first r... | 07/03/1979 |
| 4072604 | Process to separate hydrocarbons from gas streams A process for the separation of specific C2 to C6 hydrocarbons from a gaseous feed stream containing C1 to C6 -plus hydrocarbons. The feed stream enters an absorber and is first contacted by a primary lean liqui... | 02/07/1978 |
