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| Number | Title | Issue Date |
| 8088200 | Method for removing acid gases from a fluid stream In a method for removing acid gases from a fluid stream, the fluid stream, which is in contact with an absorption medium within an absorber, is passed through a first absorption zone in the absorber to remove a majority of acid gases from the fluid stream. The fluid... | 01/03/2012 |
| 7998248 | Process for the dehydration of gases Process for the dehydration of gases, comprising: absorbing water vapor by means of a hygroscopic liquid consisting essentially of one or more C2-C8 glycols and an additive capable of forming a minimum type azeotrope with water; distilling the ... | 08/16/2011 |
| 7938888 | Systems and methods for dehumidification A liquid desiccant regenerator system, including a desiccant/air heat exchanger having a first desiccant inlet and a desiccant reservoir. The reservoir has a first desiccant outlet, a second desiccant outlet and a second desiccant inlet. The first desiccant inlet an... | 05/10/2011 |
| 7311001 | Multiphase flow measurement apparatus and method An apparatus is utilized for obtaining flow measurements from an individual oil and gas well. The apparatus utilizes pipe segments rather than vessels to separate the fluid components into a gas phase, a water phase, and an oil phase. Separation of the flow stream i... | 12/25/2007 |
| 6964729 | Oxidizing undesired compounds resident within liquid absorbent compounds, reducing atmospheric pollution, regenerating a liquid absorbent and conserving fuel usage associated with reboiler utilization An improved method and apparatus for oxidizing undesired compounds residing within a liquid glycol based absorbent wherein the compounds are heated within a reboiler chamber to their boiling point to effectuate production of vaporized effluents. The absorbent's vapo... | 11/15/2005 |
| 6793714 | Process for dehydrating and stripping a wet natural gas In a process for dehydration/fractionation of a wet natural gas containing heavy constituents and light constituents, In the presence of methanol, aqueous liquid phases are combined and the resultant combined aqueous liquid phase contacted with the first part of the... | 09/21/2004 |
| 6585807 | Recovery method of ammonia from gaseous mixture An object of the present invention is to carry out separation recovery of ammonia efficiently from a gaseous mixture containing ammonia and carbon dioxide, without generating a solid ammonium carbamate. A recovery method of ammonia from a gaseous mixture,... | 07/01/2003 |
| 6461413 | Method for dehydrating a wet gas using a liquid dessicant, with advanced regeneration of said dessicant In a process using a hydrophilic liquid desiccant, for dehydrating a gas containing water with regeneration of the steps of: (a) absorbing water by contact between the moist gas and regenerated liquid desiccant from step c), producing a dry gaseous efflue... | 10/08/2002 |
| 6447578 | Process for the removal of nitrogen contained in natural gas Process for the removal of nitrogen contained in natural gas wherein are performed the steps of: a) absorbing the hydrocarbon component of natural gas by means of virgin naphtha in an absorption device, discharging the non-absorbed nitrogen; b) stripping the h... | 09/10/2002 |
| 6425942 | Method and device for drying a gas The gas which is to be dried is fed into an absorber (1) where it is brought into contact with a glycol in countercurrent. The glycol absorbs the moisture from the gas and impurities. The glycol laden with water and impurities is removed from the absorber... | 07/30/2002 |
| 6299671 | Device and process for dehydration of water absorbent There is described a method for regeneration of triethylene glycol (TEG) that has been used as a drying medium to remove water from a fluid such as natural gas, where a drier TEG is recovered at the bottom fraction in a regeneration column (7), where wate... | 10/09/2001 |
| 6162282 | Method for determining hydrocarbon saturation of carbon filters in a gas treatment process A method for determining the efficiency of a carbon filter used to absorb hydrocarbons from organic solvents. A sample of the solution, used to remove CO2 and H2 S from natural hydrocarbon gases, is taken after it has passed through ... | 12/19/2000 |
| 6156102 | Method and apparatus for recovering water from air A process of separating water from ambient air involves a liquid desiccant to first withdraw water from air and treatment of the liquid desiccant to produce water and regenerated desiccant. Water lean air is released to the atmosphere. Heat generated in t... | 12/05/2000 |
| 6152994 | Process for the purification of an alkanolamine A process for the purification of an aqueous alkanolamine which process involves subjecting the alkanolamine to a distillation process carried out in one or more film-type evaporators and involves at least two steps, wherein in the first step water is rem... | 11/28/2000 |
| 5766313 | Hydrocarbon recovery system Apparatus for treating emissions from a reboiler used to remove glycol from water laden glycol wherein the emissions are condensed; pressurized and separated so that hydrocarbon vapors may be directed to a burner used to supply heat to a reboiler. Control... | 06/16/1998 |
| 5536303 | Method of low temperature regeneration of glycol used for dehydrating natural gas A method of low temperature regeneration of glycol used for dehydrating natural gas in a glycol dehydration system including the steps of passing natural gas against flowing glycol in an absorber vessel so that the glycol absorbs water from the gas, provi... | 07/16/1996 |
| 5490873 | Hydrocarbon emission reduction An improved process for the glycol dehydration of water-containing natural gas comprises contacting the natural gas and glycol in a contacting zone to produce a dried natural gas and a water-rich glycol, and heating the water-rich glycol in a regeneration... | 02/13/1996 |
| 5453114 | Method of dehydrating natural gas for reducing emissions of hydrocarbon impurities A method of dehydrating natural gas and for reducing emissions of hydrocarbon aromatics including the steps of passing natural gas upwardly in an absorber against downwardly flowing liquid desiccant to provide treated gas, the desiccant absorbing water an... | 09/26/1995 |
| 5133949 | Process and device for the removal of H2 S Process for removing hydrogen sulfide at low concentration in a gas containing water vapor. The gas is cooled to a temperature below the dew point of water, which condenses and separates the water. The dry gas is scrubbed free of hydrogen sulfide by an H | 07/28/1992 |
| 4979966 | Process and apparatus for the dehydration, deacidification, and separation of a condensate from a natural gas The invention relates to a process and apparatus for the treatment of a gas containing methane, water, at least one hydrocarbon other than methane, as well as at least one acid gas.... | 12/25/1990 |
| 4965062 | Hydrogen sulfide removal and sulfide recovery A process and apparatus for removing hydrogen sulfide from high pressure gas and recovering liquid sulfur, which includes reacting the H2 S with sulfite ions and an acetic acid-acid salt buffering system in an aqueous stream whereby liquid sulf... | 10/23/1990 |
| 4691074 | Monochlorobiphenyl:cuprous aluminum tetrachloride A compound, monochloro biphenyl: CuAlCl4, has been isolated and proven to exist. Monochloro biphenyl can be any one of the possible three isomers, ortho, meta and para or can be any mixture of the three isomers. An improved process is provided for t... | 09/01/1987 |
| 4556546 | Bis tertiary amino alkyl derivatives as solvents for acid gas removal from gas streams A process is set forth for the selective removal of acid gases such as H2 S, COS and CO2 from a gas stream by contacting the stream with a bis tertiary amino alkyl solvent compound such as 4,4'-(oxydi-2,1-ethanediyl) bismorpholine. W... | 12/03/1985 |
| 4525180 | Process for recovery of ethylene from gaseous mixture With application of new liquid absorbent, comprised of a compound selected from a group composed of silver halide and cuprous halide, an aluminium halide, a polymer selected from a group composed of styrene and styrene derivatives, and an aromatic hydroca... | 06/25/1985 |
| 4504449 | Process of regenerating absorbent solutions for sulfur-containing gases In a process of regenerating laden absorbent solutions used to desulfurize gases which contain H2 S and CO2 and possibly COS, which solutions contain at least one highly volatile secondary amine in an organic solvent, the laden absor... | 03/12/1985 |
| 4488890 | Low temperature separation of gaseous mixture for methanol synthesis For the low-temperature separation of a gaseous mixture containing essentially hydrogen, C1+ -hydrocarbons, and carbon monoxide, resulting in a purified gaseous mixture to be processed, after the low-temperature separation, in methanol synthesi... | 12/18/1984 |
| 4356161 | Process for reducing the total sulfur content of a high CO2 -content feed gas In the process for reducing the total sulfur content of a high CO2 -content feed gas stream, the feed gas is first passed to an absorption column. The unabsorbed, high CO2 -content gas is then routed to a reduction step where it is c... | 10/26/1982 |
| 4346561 | Generation of energy by means of a working fluid, and regeneration of a working fluid A method of optimizing, within limits imposed by a heating medium from the surface of an ocean and a cooling medium from an ocean depth, the energy supply capability of a gaseous working fluid which is expanded from a charged high pressure level to a spen... | 08/31/1982 |
| 4345918 | Process for purification of gas streams A process for separation of carbon dioxide and sulfur containing compounds from a gas stream including the step of feeding the liquid physical solvent absorbent containing dissolved carbon dioxide and sulfur containing gases into the central region of a f... | 08/24/1982 |
| 4336044 | Process for separating coal synthesized methane from unreacted intermediate and contaminant gases Gas produced from coal and containing CH4, CO, CO2, H2 and H2 S is contacted with CO2 scrub liquid to form (1) a liquid CO2 stream containing as solutes CH4, H2 S and minor... | 06/22/1982 |
| 4332596 | Energy efficient scrubbing of sulfur compounds from moist gaseous mixtures In the selective removal of sulfur compounds, e.g., H2 S, COS, from moist gaseous mixtures, comprising scrubbing the gaseous mixture in a column at a temperature below 0° C., with toluene or xylene as the scrubbing liquid, and prior to the scr... | 06/01/1982 |
| 4332598 | Process for treating industrial gas stream This invention relates to a method for producing a hydrogen stream and a carbon dioxide stream from a mixed gas feedstock containing hydrogen, carbon dioxide, and contaminant sulfur compounds. The method comprises scrubbing the gas feedstock with a carbon... | 06/01/1982 |
| 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 |
| 4210426 | Process for recovering propene and propene/propane mixtures from the off-gases from the hydroformylation of propene A process for recovering propene and propene/propane mixtures from the off-gases obtained from the hydroformylation of propene involves contacting the off-gases with a liquid absorbent comprising at least one of the liquid substances formed during the hyd... | 07/01/1980 |
| 4191620 | Electrochemical conversion of sulfur-containing anions to sulfur An aqueous solution comprising one or more sulfur-containing anions is introduced into a diaphragmless, mercury, electrolytic cell wherein, in the presence of an impressed direct electric current, the sulfur-containing anions are electro-chemically conver... | 03/04/1980 |
| 4191732 | Method of removing sulfur dioxide from gases Sulfur dioxide is removed from a sulfur dioxide-containing gas mixture by contacting the gas mixture with a monoolefin or diolefin.... | 03/04/1980 |
| 4175929 | Process for control of pollutants generated during coal gasification The present invention is directed to an improvement in the coal gasification process that effectively eliminates substantially all of the environmental pollutants contained in the producer gas. The raw producer gas is passed through a two-stage water scru... | 11/27/1979 |
| 4150956 | Producing medical grade oxygen for human, animal, or laboratory use by paramagnetic separation of oxygen from air The aeration of specific inert, nonmagnetic liquids, under superatmospheric pressure, and ambient temperature, increases both the oxygen and nitrogen solubility of the liquid. Filtered, sterilized air, within a controlled temperature range is dissolved un... | 04/24/1979 |
| 4120667 | Isolation of pure ammonia from gas mixtures containing ammonia and carbon dioxide To isolate ammonia from gas mixtures containing ammonia and carbon dioxide, the gas mixture is first partially absorbed in a solvent, with residence times of at most 0.1 second, and the non-absorbed gas is then separated from the solution obtained. The so... | 10/17/1978 |
| 4110087 | Sulfur dioxide removal by absorption and fractionation Anhydrous liquid sulfur dioxide is recovered from environmentally unsuitable vapor or liquid streams comprising water, sulfur dioxide and carbon dioxide. The vapor streams are fed into an absorption zone and contacted with a lean liquid water stream. A re... | 08/29/1978 |
