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| Number | Title | Issue Date |
| 7615102 | Corrosion and gas hydrate inhibitors with an increased biological degradability and a reduced toxicity The invention relates to the use of compounds of formula (1) as corrosion and gas hydrate inhibitors. In said formula: R1 and R2 independently of one another represent C1 to C22 alkyl, C2 to C22 alken... | 11/10/2009 |
| 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 |
| 7309381 | Gas storage canister A vapor storage canister used to treat fuel vapor of an automotive internal combustion engine. The vapor storage canister includes a casing. A granular formed heat accumulative material is disposed in the casing and includes a powdered heat accumulative agent formed... | 12/18/2007 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| 7008466 | Method for inhibiting hydrate formation A method for inhibiting the formation of gas hydrates within a fluid comprising a gaseous hydrocarbon phase, a liquid hydrocarbon phase and an aqueous phase which method comprises mixing a polymeric emulsifier and optionally a non-ionic non-polymeric co-emulsifier w... | 03/07/2006 |
| 6973968 | Method of natural gas production A method and system for dissociating methane hydrate deposits in-situ is provided wherein an oxidizer fluid and a supply of fuel, both at a pressure higher than that of the methane hydrate deposit, are supplied and delivered to the methane hydrate deposit. The fuel ... | 12/13/2005 |
| 6946017 | Process for separating carbon dioxide and methane A process for separation of carbon dioxide and methane in which a gas mixture comprising carbon dioxide and methane is brought into contact with a methane hydrate solid material disposed in a reactor vessel, whereby the methane hydrate is displaced by carbon dioxide... | 09/20/2005 |
| 6916361 | Method for separation of non-hydrocarbon gases from hydrocarbon gases A method for the separation of non-hydrocarbon gases from hydrocarbon gases, the method comprising the steps of: adding water and an agent adapted to reduce the interfacial tension between water and hydrocarbons to a first stream of desired hydrocarbon and undesired... | 07/12/2005 |
| 6905605 | Method for inhibiting the plugging of conduits by gas hydrates A method for inhibiting hydrate formation in a hydrocarbon flow by adding an amount of a dendrimeric compound effective to inhibit formation of hydrates at conduit temperatures and pressures, and flowing the mixture containing the dendrimeric compound and any hydrat... | 06/14/2005 |
| 6878187 | Seeded gas-liquid separator and process A separation process, the steps that include: providing an expansion zone, flowing a gaseous fluid into and through the expansion zone, flowing a spray of liquid droplets into the expansion zone to mix with the gaseous fluid and produce nucleation sites, then expand... | 04/12/2005 |
| 6867262 | Grafted polymers as gas hydrate inhibitors Graft polymers are used as gas hydrate inhibitors. ... | 03/15/2005 |
| 6797039 | Methods and systems for selectively separating CO2 from a multicomponent gaseous stream 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 that includes a gaseous CO2 | 09/28/2004 |
| 6733573 | Catalyst allowing conversion of natural gas hydrate and liquid CO2 to CO2 hydrate and natural gas A method for recovering large volumes of hydrocarbon fuels, particularly methane (CH4), using commercially available reagents which are strongly water-soluble and soluble in liquid CO2 in the presence of liquid CO2 injected into the ... | 05/11/2004 |
| 6602326 | Method for separation of gas constituents employing hydrate promoter The present invention relates to a method for separation of gas constituents from a multicomponent gaseous mixture employing a hydrate promoter. The method for separation of gas constituents from a multicomponent gaseous mixture includes the steps of reac... | 08/05/2003 |
| 6596911 | Composition and method for inhibition of formation of gas hydrates A method and a composition used therein are disclosed for inhibiting formation of hydrocarbon hydrates. The composition comprises an onium compound, an amine salt and, optionally, a solvent. The method and composition are particularly useful for oil and g... | 07/22/2003 |
| 6417417 | Additive formulation for improving transport of oilfield effluents which may contain hydrates, and a process using this formulation In order to improve the transport of oilfield effluents comprising water, a gas and possibly a liquid hydrocarbon phase under thermodynamic conditions which can lead to the formation of hydrates, a formulation containing at least two additives, one of whi... | 07/09/2002 |
| 6409802 | Method for preventing scaling in wet-process waste gas treatment equipment A method for preventing scale formation in a wet type exhaust gas treating apparatus is disclosed. An exhaust gas is contacted with a washing liquid containing water. The washing liquid contains at least one chelating agent which reacts with ions becoming... | 06/25/2002 |
| 6232273 | Clathrate hydrate inhibitor and method of inhibiting the formation of clathrate hydrates using it Disclosed herein are clathrate hydrate inhibitors and the method of inhibiting the formation, agglomeration, and deposition of clathrate hydrate using the inhibitors. The clathrate hydrate inhibitor comprises a macromolecular compound in which 3-15 member... | 05/15/2001 |
| 6214091 | Method and compound for inhibiting the plugging of conduits by gas hydrates A method is disclosed for inhibiting the plugging of a conduit for the transport of hydrocarbon fluids by gas hydrates., wherein use is made of a hydrate formation inhibitor component of formula (R1)(R2)(R3)(R4)A | 04/10/2001 |
| 6194622 | Method for inhibiting hydrate formation A method for inhibiting the formation of gas hydrates in a petroleum fluid having hydrate-forming constituents is claimed. More specifically, the method can be used to treat a petroleum fluid, such as natural gas conveyed in a pipe, to inhibit the formati... | 02/27/2001 |
| 6180699 | Blend for preventing or retarding the formation of gas hydrates A composition is provided herein for preventing or retarding the formation of gas hydrates or for reducing the tendency of gas hydrates to agglomerate, during the transport of a fluid comprising water and a hydrocarbon, through a conduit. The composition ... | 01/30/2001 |
| 6177497 | Additives for inhibiting gas hydrate formation The invention relates to an additive for inhibiting gas hydrate formation, containing a) from 5 to 90% by weight of 2-isobutoxyethanol, b) from 5 to 60% by weight of a copolymer which has structural units which are derived from maleic acid, maleic anhydride or... | 01/23/2001 |
| 6152993 | Method for inhibiting the plugging of conduits by gas hydrates A method is disclosed for inhibiting the plugging of a conduit for the transport of hydrocarbon fluids by gas hydrates, wherein use is made of a hydrate formation inhibitor component of formula (R1) (R2) (R3) (R4)A | 11/28/2000 |
| 6107531 | Method for inhibiting hydrate formation A method for inhibiting the formation of clathrate hydrates in a fluid having hydrate-forming constituents involves treating the fluid with an inhibitor comprising a substantially water soluble polymer having a polymer backbone .with a pendant C1 | 08/22/2000 |
| 6102986 | Method of inhibiting gas hydrate formation The present application relates to a method for inhibiting gas hydrate formation, which involves the addition to the aqueous phase, in the case of multiphase mixtures comprising water, gas and possibly condensate, of an amine oxide or salts thereof.... | 08/15/2000 |
| 6093862 | Process for slowing the growth and/or agglomeration and possibly retarding the formation of hydrates in a production effluent A process for slowing the growth and/or agglomeration of hydrates in a fluid comprising water and gases by adding at least one essentially water-soluble polyoxyalkylene glycol macromer or at least one essentially water-soluble polymer containing a single ... | 07/25/2000 |
| 6093863 | Method for inhibiting the formation of gas hydrates A composition for preventing or retarding the formation of gas hydrates or for reducing the tendency of gas hydrates to agglomerate, during the transport of a fluid comprising water and a hydrocarbon, through a conduit, comprising, (a) a polymer or copoly... | 07/25/2000 |
| 6076278 | Methods of drying pipelines The present invention provides improved methods of drying pipelines containing water which are to transport hydrate forming gaseous fluids. The methods basically comprise flowing a liquid which forms an azeotrope mixture with water into contact with water... | 06/20/2000 |
| 6063972 | Hydrate inhibition A method of inhibiting or retarding formation of hydrates from water and a lower alkane, such as methane or ethane, involves adding additives which comprise (i) a corrosion inhibitor and (ii) a salt which is of formula [R1 (R2)XR | 05/16/2000 |
| 6028234 | Process for making gas hydrates The present invention provides a process for continuously producing clathrate hydrate. This process includes comprising the steps of: (a) pressurizing a hydrate-forming gas to an elevated pressure and cooling the hydrate-forming gas below the gas-water-hydrate... | 02/22/2000 |
| 6028236 | Process for slowing the growth and/or agglomeration of hydrates in a production effluent The process for slowing the growth and/or agglomeration of hydrates in a fluid comprising water and gases comprises adding gas hydrate growth and/or agglomeration inhibitors comprising an essentially water soluble polymer, characterized by a total number ... | 02/22/2000 |