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| Number | Title | Issue Date |
| 8138382 | Process for producing mixed gas hydrate The composition of raw mixed gas and the gas composition of produced mixed gas hydrate are uniformed as rapidly as possible. The process for producing a mixed gas hydrate comprises the gas hydrate forming step of reacting a mixed gas (g) with water (w) to thereby ob... | 03/20/2012 |
| 8067651 | 1-alkyl-5-oxopyrrolidine-3-carboxylic esters with improved biodegradability The invention provides compounds of the formula 1 in which A is a C2- to C4-alkylene group x is from 1 to 100 R1 is C1-C30-alkyl, C2 | 11/29/2011 |
| 8008533 | Process for regasifying a gas hydrate slurry Continuous process for regasifying a feed stream having (i) a slurry phase comprising gas hydrate particles suspended in a produced liquid hydrocarbon and optionally free produced water and (ii) optionally a gaseous phase comprising free produced gaseous hydrocarbon... | 08/30/2011 |
| 7999141 | Process for producing gas hydrate pellet A process for producing gas hydrate pellets includes generating a gas hydrate by reacting raw gas and raw water under predetermined temperature and pressure conditions, and then shaping the gas hydrate into pellets by means of a pelletizer. Newly-formed gas hydrate ... | 08/16/2011 |
| 7994374 | Recovery of kinetic hydrate inhibitor A method for treating a fluid having hydrate-forming constituents is provided. In one or more embodiments, the method includes including a mixture (110) comprising glycol and one or more kinetic inhibitors to a fluid (105) that includes one or more hyd... | 08/09/2011 |
| 7947857 | Stabilization of gas hydrates Provided are compositions and methods for increasing the stability and gas content of gas hydrates. ... | 05/24/2011 |
| 7932423 | Removal of inerts from natural gas using hydrate formation A method for separating a gas stream comprising methane and a contaminate gas comprises the steps of contacting the gas stream with water under temperature and pressure suitable for the formation of methane hydrates so as to form a water/hydrate slurry, separating t... | 04/26/2011 |
| 7863491 | Method for the production of gas clathrates A method is disclosed for continuously producing gas clathrates, comprising: introducing a reaction gas and a reaction liquid both required for clathrate formation into a reaction chamber; adjusting in the reaction chamber the conditions such that clathrates form; a... | 01/04/2011 |
| 7842846 | Process for heterogeneously catalyzed partial dehydrogenation of at least one hydrocarbon to be dehydrogenated A process for heterogeneously catalyzed partial dehydrogenation of a hydrocarbon, in which a reaction gas mixture input stream comprising the hydrocarbon to be dehydrogenated is conducted through a fixed catalyst bed disposed in a shaft and the reaction gas mixture ... | 11/30/2010 |
| 7812203 | Process for continuous production of hydrates A system, process, and apparatus are provided for the efficient continuous production of hydrates. Gas separated from a well fluid is fed into a hydrate reactor that is submerged under the sea at a predetermined depth. The hydrates generated in the hydrate reactor a... | 10/12/2010 |
| 7781627 | System and method for forming gas hydrates A system for forming gas hydrates includes a reactor adapted to receive a hydrate-forming fluid and a reaction fluid and react the hydrate-forming and reaction fluids within a reverse micellar solution to form gas hydrate particles; and a gas hydrate removal system ... | 08/24/2010 |
| 7696393 | Method and compositions for inhibiting formation of hydrocarbon hydrates A method for inhibiting formation of hydrocarbon hydrates in mixtures of water and a hydrate-forming guest molecule has been discovered that involves adding a composition to the mixtures in an amount that is effective in inhibiting formation of the hydrocarbon hydra... | 04/13/2010 |
| 7569737 | Method for excluding salt and other soluble materials from produced water A method for reducing the salinity, as well as the hydrocarbon concentration of produced water to levels sufficient to meet surface water discharge standards. Pressure vessel and coflow injection technology developed at the Oak Ridge National Laboratory is used to m... | 08/04/2009 |
| 7553996 | Gas clathrate hydrate compositions, synthesis and use A solid clathrate hydrate comprising lactate anion and a calcium cation. The clathrate hydrate serves as a sponge that can be used to store a gas such as hydrogen, methane, oxygen, or carbon dioxide. The presence of carboxylate anion (lactate) stabilizes the clathra... | 06/30/2009 |
| 7511180 | Stabilizing petroleum liquids for storage or transport A process is provided for stabilizing a petroleum liquid feed stream which contains a more volatile hydrocarbon portion, a less volatile hydrocarbon portion and water. The more volatile hydrocarbon portion of the petroleum liquid feed stream is reacted with the wate... | 03/31/2009 |
| 7435845 | Corrosion and gas hydrate inhibitors having improved water solubility and increased biodegradability Corrosion and gas hydrate inhibitors having improved water solubility and increased biodegradability The invention thus provides the use of compounds of the formula (1) where R... | 10/14/2008 |
| 7381689 | Methods for inhibiting hydrate blockage in oil and gas pipelines using amide compounds A method and an amide composition used therein for inhibiting, retarding, mitigating, reducing, controlling and/or delaying formation of hydrocarbon hydrates or agglomerates of hydrates. The method may be applied to prevent or reduce or mitigate plugging of conduits... | 06/03/2008 |
| 7371907 | Ice method for production of hydrogen clathrate hydrates The present invention includes a method for hydrogen clathrate hydrate synthesis. First, ice and hydrogen gas are supplied to a containment volume at a first temperature and a first pressure. Next, the containment volume is pressurized with hydrogen gas to a second ... | 05/13/2008 |
| 7347945 | Method and an installation for separating out multiphase effluents The invention relates to a method and to an installation for separating out an effluent made up of a multi-phase fluid mixture. According to the invention, said installation includes gravity separator means whose geometrical separation characteristics can be adjuste... | 03/25/2008 |
| 7341617 | Corrosion and gas hydrate inhibitors having improved water solubility and increased biodegradability The invention provides the use of compounds of the formula (1) where R1, R2 are each independently C1- to C22-alkyl, C2- to C22-alkenyl, C6... | 03/11/2008 |
| 7323609 | Corrosion and gas hydrate inhibitors having improved water solubility and increased biodegradability The invention provides the use of compounds of the formula (1) where R1, R2 are each independently C1- to C22-alkyl, C2- to C22-alken... | 01/29/2008 |
| 7297823 | Additives for inhibiting the formation of gas hydrates The invention relates to the use of polymers which contain between 1 and 99 mol-% structural units of formula 1, wherein R1 represents hydrogen or C1-C6 alkyl, R2 represents C | 11/20/2007 |
| 7264653 | Methods for inhibiting hydrate blockage in oil and gas pipelines using simple quaternary ammonium and phosphonium compounds A method and a quaternary ammonium or phosphonium composition used therein for inhibiting retarding, mitigating, reducing, controlling and/or delaying formation of hydrocarbon hydrates or agglomerates of hydrates. The method may be applied to prevent or reduce or mi... | 09/04/2007 |
| 7255794 | Hydrate-based reduction of fluid inventories and concentration of aqueous and other water-containing products Toxic waste waters polluted with high levels of chemical byproducts of various industrial processes (e.g., waste water held in industrial holding ponds) are treated using gas hydrate to extract and remove fresh water from the polluted water, thus reducing the volume... | 08/14/2007 |
| 7253138 | Corrosion and gas hydrate inhibitors having improved water solubility and increased biodegradability The invention provides the compounds of the formula (1) where R1 is C1- to C22-alkyl, C2- to C22-alkenyl, C6- to C30-aryl ... | 08/07/2007 |
| 7234524 | Subsea chemical injection unit for additive injection and monitoring system for oilfield operations A system monitors and controls the injection of additives into formation fluids recovered through a subsea well. The system includes a chemical injection unit and a controller positioned at a remote subsea location. The injection unit uses a pump to supply one or mo... | 06/26/2007 |
| 7214814 | Additives for inhibiting gas hydrate formation The invention provides the use of compounds of the formula (1) where R1, R2 are each independently C1- to C22-alkyl, C2- to C22-alken... | 05/08/2007 |
| 7198108 | Changing the temperature of offshore produced water Water that is produced during offshore hydrocarbon processing, such as hot produced water accompanying hydrocarbons taken from subsea reservoirs, or cold water resulting from heating LNG (liquified natural gas) to convert it to gas, is changed in temperature to be c... | 04/03/2007 |
| 7183240 | Additives for inhibiting the formation of gas hydrates The present invention relates to an additive, and its use for inhibiting nucleation, growth and agglomeration of gas hydrates by adding an effective amount of an inhibitor to a multiphasic mixture which tends to hydrate formation and consists of water, gas and optio... | 02/27/2007 |
| 7178610 | Subterranean treatment fluids comprising polyoxazoline compositions and methods of use in subterranean formations The present invention relates to subterranean treatment fluids. In particular, the present invention relates to subterranean treatment fluid compositions that comprise polyoxazoline compositions and methods for using such compositions in subterranean applications. I... | 02/20/2007 |
| 7164051 | Gas hydrate inhibitors A method for inhibiting formation of hydrocarbon hydrates in mixtures of water and a hydrate-forming guest molecule involves adding a reaction product to the mixtures in an effective amount to inhibit formation of the hydrocarbon hydrates under conditions otherwise ... | 01/16/2007 |
| 7160507 | Corrosion inhibitors with improved water solubility and improved film persistence The invention relates to an additive and to a method of corrosion inhibition on devices for the recovery and transportation of hydrocarbons in crude oil recovery and processing by adding an effective amount of an inhibitor. The inhibitor comprises an alkoxylated qua... | 01/09/2007 |
| 7159407 | Atomized liquid jet refrigeration system A system for controlling temperature includes an atomizer that forms micron-sized hydrogen-bonded refrigerant droplets within a chamber. A vacuum pump is coupled to the chamber to lower its interior pressure. Under these conditions, the refrigerant droplets evaporat... | 01/09/2007 |
| 7152431 | Removing contaminants from natural gas A process for removing contaminants from a natural gas feed stream including water and sour species is provided, which process comprises the steps of cooling the natural gas feed stream in a first vessel (12) to a first operating temperature at which hydrates... | 12/26/2006 |
| 7128777 | Methods and systems for selectively separating COfrom a multicomponent gaseous stream to produce a high pressure COproduct Methods are provided for the selective removal of CO2 from a multicomponent gaseous stream to provide a CO2 depleted gaseous stream. In practicing the subject methods, an initial multicomponent gaseous stream is contacted with an aqueous fluid ... | 10/31/2006 |
| 7098171 | Synthetic filtration control polymers for wellbore fluids New polymers, and their applications in water-based wellbore service fluids, such as, for example, drilling fluids, yield desirable filtration control and rheological properties to such fluids even after exposure to HTHP aging. Typical temperatures encountered durin... | 08/29/2006 |
| 7093655 | Method for the recovery of hydrocarbons from hydrates A method for recovering hydrocarbon trapped in a hydrate formation, comprising the steps of (a) contacting the hydrate formation with an aqueous solution comprising from 10% to 75% by weight of a salt such as potassium formate or acetate salt to liberate hydrocarbon... | 08/22/2006 |
| 7060653 | Method of producing gas occluding material The gas storage method comprises a step of keeping a gas to be stored and an adsorbent in a vessel at a low temperature below the liquefaction temperature of the gas to be stored so that the gas to be stored is adsorbed onto the adsorbent in a liquefied state, a ste... | 06/13/2006 |
| 7033504 | Method for recovering water soluble surfactants Disclosed is a method for recovering and re-employing ionic surfactants from solutions, dispersions and emulsions of water and liquid hydrocarbons, by the addition of a second non-aqueous polar phase and an inorganic salt which changes the ionic strength of the surf... | 04/25/2006 |
| 7013673 | Hydrate-based desalination/purification using permeable support member Processes and apparatus are disclosed for separating and purifying aqueous solutions such as seawater by causing a substantially impermeable mat of gas hydrate to form on a porous restraint. Once the mat of gas hydrate has formed on the porous restraint, the portion... | 03/21/2006 |
