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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: R 1 and R 2 independently of one another represent C 1 to C 22 alkyl, C 2 ...
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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...
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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...
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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...
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7485234 |
Hydrate-based desalination using compound permeable restraint panels and vaporization-based cooling
Desalination apparatus based on porous restraint panels fabricated from a number of different layers of metal, thermoplastic, or other substances are used as sophisticated heat exchangers to...
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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...
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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,...
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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 R 1 represents hydrogen or C 1 -C 6 alkyl, R 2 represents C 1 -C 24...
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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...
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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...
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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...
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7008544 |
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...
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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...
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6969467 |
Hydrate-based desalination with hydrate-elevating density-driven circulation
In hydrate-based desalination or other water purification conducted using naturally buoyant or trapped-gas-assisted buoyancy hydrate in a hydrate fractionation column, a portion of fresh or...
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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...
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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...
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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...
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6894007 |
Additives for inhibiting gas hydrate formation
The invention relates to the use of compounds of the formula (1)
in which
R 1 is C 1 - to C 24 -alkyl, C 2 - to C 24 -alkenyl or a C 6 - to C 18 -aryl radical which may be substituted by a C...
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6890444 |
Hydrate formation and growth for hydrate-based desalination by means of enriching water to be treated
Water to be desalinated or otherwise purified is enriched by having hydrate-forming substance dissolved into it, without causing hydrate to form. Hydrate kernels are brought into contact with the...
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6867262 |
Grafted polymers as gas hydrate inhibitors
Graft polymers are used as gas hydrate inhibitors.
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6866750 |
Device for desalination of water and methods of use
The present invention provides a device and method for desalinating saltwater which utilizes a heatable vessel wherein is placed a sufficient quantity of a salt which will absorb water of...
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6855852 |
Natural gas hydrate and method for producing same
A method for the production of the natural gas hydrate characterized by the steps of: combining natural gas and water to form a natural-gas water system and an agent adapted to reduce the natural...
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6797039 |
Methods and systems for selectively separating CO2 from a multicomponent gaseous stream
Methods are provided for the selective removal of CO 2 from a multicomponent gaseous stream to provide a CO 2 depleted gaseous stream. In practicing the subject methods, an initial multicomponent...
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6774276 |
Method and system for transporting a flow of fluid hydrocarbons containing water
A method of transporting a flow of fluid hydrocarbons containing water through a treatment and transportation system including a pipeline, wherein the flow of fluid hydrocarbons is introduced into...
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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 (CH 4 ), using commercially available reagents which are strongly water-soluble and soluble in liquid CO 2 in the...
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6703534 |
Transport of a wet gas through a subsea pipeline
A transport process for a wet gas employs a subsea heat exchanger having first and second flowpaths separated by a heat transfer surface. A cooler heat transfer medium is conveyed through the first...
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6673249 |
Efficiency water desalination/purification
Various methods and apparatus for maximizing the efficiency of hydrate-based desalination or other water purification in open-water or partially open-water installations are disclosed. In one...
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6653516 |
Production method for hydrate and device for proceeding the same
A method for producing hydrate includes supplying hydrate producing substance in a gas state into an aqueous phase in a hydrate producing vessel, thereby providing the hydrate producing vessel...
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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...
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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...
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6560971 |
Air conditioning and thermal storage systems using clathrate hydrate slurry
A method and apparatus for making a hydrate slurry, which involves the preparation of an aqueous solution of a guest compound for forming a clathrate hydrate, cooling the aqueous solution, and...
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6492430 |
Methods of making emulsifying and dispersing surfactants and their use
A process for preparing a composition comprising a mixture with ester and amine function in the form of ester-amines, amines, salts of amines, monoglycerides and diglycerides all derived from...
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6451892 |
Method for preventing or retarding the formation of gas hydrates
A composition for preventing or retarding the formation of gas hydrates during the transport of a fluid comprising water and a hydrocarbon through a conduit. The composition is a homopolymer of...
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6444852 |
Amines useful in inhibiting gas hydrate formation
A novel amine is provided with improved water dispersibility which is useful to modify the formation of hydrates in streams containing low-boiling hydrocarbons and water. The amine-has the formula:...
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6436877 |
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...
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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...
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6359047 |
Gas hydrate inhibitor
A gas hydrate inhibitor includes, by weight, a copolymer including about 80 to about 95% of polyvinyl caprolactam (VCL) and about 5 to about 20% of N,N-dialkylaminoethyl(meth)acrylate or...
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6350928 |
Production of a gas hydrate slurry using a fluidized bed heat exchanger
A process is provided for converting a multi-phase fluid stream having an initial gas phase and an initial liquid phase to a gas hydrate slurry. The initial liquid phase includes an initial water...
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6331652 |
Process for producing lycopene and intermediate thereof
There are disclosed a sulfonaldehyde derivative of formula (2): ##STR1## a phosphonium salt of formula (3): ##STR2## processes for producing the same and a sulfone derivative of formula...
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6331508 |
Method for controlling gas hydrates in fluid mixtures
A method for controlling the formation of gas hydrate crystals in a fluid mixture by admixing with said fluid mixture a polyoxyalkylenediamine in an amount effective to prevent and/or inhibit...
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6245955 |
Method for the sub-sea separation of hydrocarbon liquids from water and gases
There is provided a method to separate sub-sea and/or liquid hydrocarbons from the commingled stream of gas, water, oil, and or hydrocarbon condensate produced from subterranean wells comprising...
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6235092 |
System for selectively separating CO2 from a multicomponent gaseous stream
Systems are provided for the selective removal of CO 2 from a multicomponent gaseous stream to provide a CO 2 depleted gaseous stream having at least a reduction in the concentration of CO 2 ...
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6235091 |
Systems for selectively separating CO2 from a multi-component gaseous stream
Systems are provided for the selective removal of CO 2 from a multicomponent gaseous stream to provide a CO 2 depleted gaseous stream having at least a reduction in the concentration of CO 2 ...
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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...
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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 ...
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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...
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6180843 |
Method for producing gas hydrates utilizing a fluidized bed
An apparatus for producing gas hydrates includes a reactor vessel having a fluidized or expanded bed reaction zone. The reactor vessel has an upper portion and a lower portion, wherein a...
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6111155 |
Method of producing gas hydrate in two or more hydrate forming regions
A process for producing natural gas hydrate comprises three states (i), (ii), and (iii). State (i) comprises three pressure vessels (A1, A2, and A3), stage (ii) two pressure vessels (A4 and A5),...
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6106595 |
Methods of selectively separating CO.sub.2 from a multicomponent gaseous stream
Methods are provided for the selective removal of CO 2 from a multicomponent gaseous stream to provide a CO 2 depleted gaseous stream having at least a reduction in the concentration of CO 2 ...
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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...
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