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| Number | Title | Issue Date |
| 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 |
| 7316804 | Flow reactors for chemical conversions with heterogeneous catalysts Improved apparatus for use in process systems which include exothermic chemical conversions of organic compounds to value added products is disclosed, more particularly, flow reactors for exothermic chemical conversions using a fixed heterogeneous catalyst with mean... | 01/08/2008 |
| 5336821 | Alkylation process with reactor effluent heat recovery A process for the alkylation of aromatic hydrocarbons such as cumene and ethylbenzene is disclosed. A portion of the effluent stream from an alkylation reactor passes through an indirect heat exchanger to transfer heat to a flashed stream containing the p... | 08/09/1994 |
| 5235121 | Method for reforming hydrocarbons The present invention provides a method and apparatus for reforming a hydrocarbon feedstock in the presence of steam using a steam-active reforming catalyst The present invention can generally be used in conjunction with any steam-active reforming process... | 08/10/1993 |
| 5162599 | Rapid thermal pyrolysis of gaseous feeds containing hydrocarbon molecules mixed with an inert working gas In its simplest sense, the present invention is directed toward a process for the thermal conversion of methane into unsaturated gaseous hydrocarbons, especially olefins, comprising first compressing methane in the presence of an inert gas having a higher... | 11/10/1992 |
| 5030338 | Conversion process using direct heating A process and apparatus are disclosed for the catalytic conversion of hydrocarbons in a transport or sub-transport fluidized bed reaction zone. Inert particles are used to transfer heat to the reaction zone. The particles may be heated separately from the... | 07/09/1991 |
| 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 |
| 4929334 | Fluid-bed reaction process An improved fluid-bed reaction process and apparatus are disclosed in which feedstock is preheated and may be at least partially converted by contacting the feedstock with spent catalyst in a preheat zone. Additional benefits include a reduction in cataly... | 05/29/1990 |
| 4859308 | Two-stage process for conversion of alkanes to gasoline Lower alkanes are converted to olefins in a `third bed` external catalyst cooler (ECC) in which hot catalyst, from a first regenerator (`second bed`) operating in conjunction with a fluid catalytic cracker (`first bed`), thermally cracks and dehydrogenate... | 08/22/1989 |
| 4832919 | Olefin fractionation and catalytic conversion system with heat exchange means A heat balanced system for converting an olefinic feedstock comprising ethylene and C3+ olefins to heavier liquid hydrocarbon product in a catalytic exothermic process. Means are provided for prefractionating the olefinic feedstock t... | 05/23/1989 |
| 4788042 | System for conversion of methanol to gasoline A methanol-to-gasoline (MTG) catalytic conversion system in which the conversion is conducted in a fixed bed catalytic reactor. A C3 -C4 hydrocarbon diluent is generated from pressurized liquid effluent and recycled to the fixed bed ... | 11/29/1988 |
| 4788369 | Conversion of methanol to gasoline A methanol-to-gasoline (MTG type) conversion process in which the conversion is conducted in a fixed bed catalytic reactor. A C3 -C4 hydrocarbon diluent is generated from the effluent in a series of steps and recycled to the fixed be... | 11/29/1988 |
| 4628136 | Dehydrogenation process for production of styrene from ethylbenzene comprising low temperature heat recovery and modification of the ethylbenzene-steam feed therewith An improved process for the production of styrene through dehydrogenation of ethylbenzene in the presence of steam at elevated temperatures, comprising (1) recovering heat of condensation normally lost during separation of the various components of the de... | 12/09/1986 |
| 4511747 | Light olefin conversion to heavier hydrocarbons with sorption recovery of unreacted olefin vapor In the conversion of light olefins to heavier hydrocarbons, an improved recovery technique is provided for selectively removing unreacted light olefins from a catalytic reactor effluent. This system is useful in converting ethene-rich feedstocks to gasoli... | 04/16/1985 |
| 4479025 | Alkylaromatic hydrocarbon dehydrogenation process A hydrocarbon conversion process is disclosed for the dehydrogenation of alkylaromatic hydrocarbons such as ethylbenzene or ethyltoluene. A subatmospheric pressure is maintained in the reaction zone by the use of two separate compressors. The first compre... | 10/23/1984 |
| 4476918 | Method and apparatus for a temperature-shifted chemical heat pipe A method and apparatus are provided in a chemical heat pipe for shifting the reaction equilibrium in order to operate at a "shifted" temperature without also "shifting" the pressure. A diluent is added to the heat pipe in a constant-pressure manner near a... | 10/16/1984 |
| 4450311 | Heat exchange technique for olefin fractionation and catalytic conversion system A heat balanced technique for converting an olefinic feedstock comprising ethylene and C3+ olefins to heavier liquid hydrocarbon product in a catalytic exothermic process. Methods and means are provided for prefractionating the olefi... | 05/22/1984 |
| 4417083 | Process for the dehydrocyclization of paraffins at low pressure A process for the production of aromatic hydrocarbons from petroleum fractions containing paraffins which comprises passing said charge in the presence of hydrogen at 400° C.-550° C. over a catalyst containing from 0.1 to 1.5% by weight of at least one ... | 11/22/1983 |
| 4279734 | Quench Process A method of recovering heat energy from hydrocarbon pyrolysis effluent characterized by differentiated cooling systems, reduced coking, and high quality steam generation. Steam quality is improved by utilization of a minimum quenched effluent temperature ... | 07/21/1981 |
| 4138440 | Conversion of liquid alcohols and ethers with a fluid mass of ZSM-5 type catalyst The conversion of alcohols and ethers to gasoline boiling constituents with HZSM-5 catalyst in a fluid catalyst system is arranged for reactant plug flow wherein the reaction temperature is controlled by the heat of vaporization of liquid reactant charged... | 02/06/1979 |
| 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 |
| 4123219 | Chemical storage of radiant energy A method for the chemical storage of radiant energy in which substituted naphthalenes undergo photochemical dimerization by exposure to radiant energy to form 1,2,2a,7,8,12b-hexahydro-1,8,2,7-ethanedihylidenedibenzo[a,e]cyclobuta[c]c yclooctenes, whic... | 10/31/1978 |
| 4108914 | Aromatic hydrocarbon alkylation process A process for the production of alkylaromatic hydrocarbons by the alkylation of benzene wherein the alkylation zone effluent is fractionated to form a bottoms stream comprising benzene, the alkylaromatic hydrocarbon and a light paraffin. The light paraffi... | 08/22/1978 |
| 4071573 | Prolonging zeolite catalyst life in methanol conversion to gasoline by disposing of exothermic reaction heat A method for effecting chemical reactions of aliphatic hetero compounds comprising alcohols, halides, mercaptans, sulfides, amines, ethers and carbonyl compounds with a fluidized crystalline zeolite catalyst and regeneration of a portion of the catalyst u... | 01/31/1978 |
| 4058576 | Conversion of methanol to gasoline components A method and sequence of process steps is described for effecting the conversion of lower alcohols comprising methanol, ethanol and propanol to gasoline boiling range component arranged to significantly extract reaction heat and selectively control the re... | 11/15/1977 |
| 4044061 | Preheating methanol effects steady state operation of conversion to gasoline The conversion of methanol to gasoline boiling hydrocarbons in a thermally balanced operation with a special group of zeolite catalysts having a constraint index of 1 to 12, a silica to alumina ratio of at least about 12 and a crystal density of not subst... | 08/23/1977 |
| 4021501 | Production of hydrocarbons In the thermal cracking of a hydrocarbon feedstock, the quenching of the gases leaving the cracking zone is deliberately deferred for a very short time to permit continued endothermic reaction and thereby increase the ethylene yield.... | 05/03/1977 |
| 4008289 | Adsorbent treating method A more economical method of removing materials adsorbed on solid adsorbents used to treat hydrocarbon streams is presented. The method comprises removing a liquid hydrocarbon stream from a distillation column, vaporizing the liquid stream and superheating... | 02/15/1977 |
| 3998899 | Method for producing gasoline from methanol A method for converting lower alcohols to ethers and hydrocarbons in an exothermic restricted process control arrangement with efficient utilization of process generated heat is described.... | 12/21/1976 |
| 3994675 | Chemical storage of radiant energy A system for the chemical storage of radiant energy in which either: A. 1,8-diaryl-1a,2,7,7a-tetrahydro-1,2,7-metheno-1H-cyclopropa[b]naphthalenes (1) are converted on heating to 1,2-diaryl-2a,8b-dihydrocyclobuta[a]naphthalenes (2) or 8,9-diaryl-benz... | 11/30/1976 |
