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7553406 |
Process for removing polar impurities from hydrocarbons and mixtures of hydrocarbons
This invention relates to a process for removing polarizable impurities from hydrocarbons and mixtures of hydrocarbons using ionic liquids as an extraction medium. By way of extraction, the degree...
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7517447 |
Sterically hindered N-methylsecondary and tertiary amine sulfur scavengers and methods for making and using same
An new class of oil-soluble, sulfur scavengers or converts are disclosed where the scavengers include substantially monomeric aldehyde-amine adducts from the reaction of at least one sterically...
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7438877 |
Fast, high capacity hydrogen sulfide scavengers
Selective, irreversible removal of hydrogen sulfide (H 2 S) and other sulfhydryl compounds from a gas stream, such as sour natural gas and sour hydrocarbon liquids is achieved with a scavenging...
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7374734 |
Absorbing agent and method for eliminating acid gases from fluids
The disclosure relates to an absorbent for removing acid gases from fluids. The absorbent contains at least one tertiary amine, an amine which is selected from hydroxyethylpiperazine,...
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7153414 |
Process for the upgrading of raw hydrocarbon streams
A process for the upgrading of raw hydrocarbon streams rich in heteroatomic polar compounds and/or unsaturated moieties involving the extractive oxidation of sulfur, nitrogen, conjugated dienes and...
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7001504 |
Method for extraction of organosulfur compounds from hydrocarbons using ionic liquids
A process for the removal of organosulfur compounds from hydrocarbon materials is disclosed. The process includes contacting an ionic liquid with a hydrocarbon material to extract sulfur-containing...
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6893554 |
Naphtha desulfurization with selectively suppressed hydrogenation
Naphtha is selectively hydrodesulfurized in the presence of a sulfided, treated catalyst comprising at least a Group VIB metal catalytic component, to produce sulfur-reduced naphtha with reduced...
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6881325 |
Preparation of components for transportation fuels
Economical processes are disclosed for the production of components for refinery blending of transportation fuels by selective oxidation of feedstocks comprising a mixture of hydrocarbons,...
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6802959 |
Separation of olefinic hydrocarbons from sulfur-containing hydrocarbons by use of a solvent
A process for separating olefins from sulfur-containing hydrocarbons contained in a hydrocarbon feedstock is disclosed and includes contacting the hydrocarbon feedstock with N-hydroxyethyl...
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6673238 |
Acidic petroleum oil treatment
A process for hydrotreating acidic compounds of an acidic petroleum oil is disclosed. The process includes contacting the acidic petroleum oil with a hydrogen donor solvent to thereby produce a...
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6531055 |
Method for reducing the naphthenic acid content of crude oil and fractions
The present invention relates to a process for reducing naphthenic acid content of crude oils and its fractions in the presence of an aqueous base selected from Group IA and IIA hydroxides and...
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6483003 |
Removal of impurities from a hydrocarbon component or fraction
A process for removing impurities from a hydrocarbon component or fraction comprises mixing, in a liquid-liquid extraction step, an impurity-containing liquid hydrocarbon component or fraction, as...
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6444117 |
Sweetening of sour crudes
The general object of this invention is to provide an improved process for sweetening and desulfurizing sulfur-containing crude oil streams. Heating the sulfur-containing crude oil stream to an...
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6441264 |
Method for separating benzothiophene compounds from hydrocarbon mixture containing them, and hydrocarbon mixture obtained by said method
A method for separating at least a benzothiophene compound from a hydrocarbon mixture is disclosed. The method includes contacting the mixture of a fraction obtained therefrom with a reagent...
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6358402 |
Extractive distillation process for the reduction of sulfur species in hydrocarbons streams
A method for separating sulfur species from hydrocarbon streams, particularly cracked naphtha streams, using extractive distillation. The method effectively separates sulfur species from cracked...
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6277271 |
Process for the desulfurization of a hydrocarbonaceoous oil
A process for the desulfurization of hydrocarbonaceous oil wherein the hydrocarbonaceous oil and a recycle stream containing sulfur-oxidated compounds is contacted with a hydrodesulfurization...
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6224750 |
Producing low sulfur hydrocarbons with biologically regenerated caustic
A process is disclosed for producing very low sulfur content hydrocarbon streams by contacting a hydrocarbon feedstream with an aqueous alkaline treatment stream which has been regenerated by the...
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6207043 |
Method of preparing low-sulphur aliphatic compounds
Low-sulfur aliphatic compounds are obtained from olefin-rich starting materials contaminated with organic sulfur compounds.
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6187227 |
Thiacrown ether compound corrosion inhibitors for alkanolamine units
The corrosion of metals in contact with aqueous alkanolamine solution in acid gas removal units is inhibited by adding to the alkanolamine solution a corrosion inhibiting amount of a thiacrown...
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6171478 |
Process for the desulfurization of a hydrocarbonaceous oil
A process for the desulfurization of hydrocarbonaceous oil wherein the hydrocarbonaceous oil is contacted with a hydrodesulfurization catalyst in a hydrodesulfurization reaction zone to reduce the...
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6153100 |
Removing iron salts from NGL streams
The aqueous wash stream of an electrolytic precipitation system treating natural gas liquid (NGL) is maintained at a pH sufficiently basic to decrease the solubility of iron sulfide in the aqueous...
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6120679 |
Method of hydrodesulfurizing catalytic cracked gasoline
A method of hydrodesulfurizing a catalytic cracked gasoline which comprises providing a presulfided catalyst modified with a basic organic nitrogen compound and contacting the catalytic cracked...
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6117310 |
Process for treating a hydrocarbon substrate with a bisoxazolidine hydrogen sulfide scavenger
The present invention provides a method for scavenging sulfhydryl compounds from sour hydrocarbon substrates, preferably crude oils, refined distillate streams, and natural gas, by mixing the...
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6024866 |
Method of scavenging hydrogen sulfide from hydrocarbons
Hydrocarbons, gas mixtures of hydrocarbons, and the like containing hydrogen sulfide are brought into intimate contact with a hydrogen sulfide scavenger prepared by reacting an alkylenepolyamine...
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6013175 |
Quaternary ammonium hydroxides as mercaptan scavengers
A method for scavenging mercaptans in a hydrocarbon fluid is disclosed. According to the method, an effective mercaptan-scavenging amount of an aqueous scavenging composition is added to the fluid....
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6007705 |
Method for demetallating petroleum streams (LAW772)
The present invention relates to a process for demetallating a petroleum stream by contacting a metals-containing petroleum feed in the presence of an aqueous base selected from Group IA and IIA...
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5980733 |
Method of removing sulfur compounds from hydrocarbon streams
A method of removing hazardous sulfur compounds, such as hydrogen sulfide, mercaptans and sulfur oxides, from a fluid stream comprising contacting the fluid stream with an aqueous composition...
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5980845 |
Regeneration of hydrogen sulfide scavengers
The present invention generally provides sulfide scavenger solutions and processes that have high sulfide scavenging capacity, provide a reduction or elimination of solids formation and avoid the...
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5921911 |
Methods of inhibiting foam formation in alkanolamine systems
A method for inhibiting foam formation in a stripper of an amine unit is disclosed. The addition of non-foaming demulsifiers to the liquid, compressed hydrocarbon stream entering or the aqueous...
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5807476 |
Method of removing sulfur compounds from sour crude oil and sour natural gas
A method of removing hazardous sulfur compounds, such as hydrogen sulfide and sulfur dioxide, from sour crude oil and sour natural gas. An aqueous composition of an amine oxide surfactant, and...
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5753102 |
Process for recovering organic sulfur compounds from fuel oil
The present invention provides a process and equipment for efficiently and economically recovering organic sulfur compounds in a fuel oil while maintaining the original chemical structures thereof....
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5744024 |
Method of treating sour gas and liquid hydrocarbon
Reaction of 1,3,5-tri-substituted-hexahydro-1,3,5-triazine is accelerated in H 2 S scavenging by the addition of quaternary ammonium compound. The preferred hexahydro triazines are...
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5700368 |
Treatments to reduce aldol condensation and subsequent polymerization in caustic acid gas scrubbers
The present invention provides a number of agents that are useful to inhibit aldol condensation in caustic scrubbers. Preferred agents include, but are not necessarily limited to benzoic hydrazide,...
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5689033 |
Process for removal of impurities from light paraffin isomerization feedstocks
A process is directed to the removal of impurities such as sulfur compounds, oxygenates, and/or olefins from a light paraffin hydrocarbon feedstock such as a C 4 -C 6 fraction, which may be used...
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5625117 |
Fuel gas stripping of rich amine to remove hydrocarbons
Minor amounts of C 3 -C 4 hydrocarbons from amine absorbents used in removing H 2 S liquid C 3 -C 4 hydrocarbon are recovered. The process features recovery of the C 3 -C 4 hydrocarbon in a...
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5603832 |
Method for removing hydrogen sulphide from oil-containing water and equipment therefor
The invention relates to a method for removing hydrogen sulphide (H 2 S) from oil-containing water and equipment therefor. Oil-containing water and nitrate is conducted through a bioreactor to...
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5552036 |
Process for reducing the level of sulfur in a refinery process stream and/or crude oil
This invention relates to a process for reducing the sulfur in a refinery process stream and/or crude oil, which comprises treating said refinery process stream and/or crude oil with an effective...
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5462721 |
Hydrogen sulfide scavenging process
The levels of hydrogen sulfide and organic sulfides present in gaseous or liquid hydrocarbon streams or mixtures thereof are reduced by contacting the streams with a composition comprising the...
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5417845 |
Use of decahydro pyrazino [2,3-b] pyrazine for the reduction of the proportion of free or combined hydrogen sulphide present in a fluid
Process and use of decahydro pyrazino [2,3-b] pyrazine for the reduction of the proportion of free or combined hydrogen sulphide present in a fluid.
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5354453 |
Removal of H.sub.2 S hydrocarbon liquid
Reactive S (e.g. H 2 S and mercaptans) in petroleum liquid are scavenged by the use of oil soluble trialkyl hexahydro triazines wherein at least one alkyl group, and preferably all three, contain...
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5344555 |
Treatment of oils using reaction products of epoxides and tertiary amines
Sour sulfhydryl group containing oils are treated with an effective amount of a sweetening, hydrogen sulfide vapor reducing quaternary ammonium compound of the formula ##STR1## (a) wherein (i) R 1...
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5283006 |
Neutralizing amines with low salt precipitation potential
A method for neutralizing acidic species and inhibiting the deposition of amine acid salts on the internal surfaces of elevated temperature processing units in a petroleum refinery comprising...
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5271835 |
Process for removal of trace polar contaminants from light olefin streams
A process is disclosed for improving catalyst performance and yields in the manufacture of motor gasoline components. More particularly the process is directed to the removal of H 2 S, sulfur...
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5223127 |
Hydrogen sulfide scavengers in fuels, hydrocarbons and water using amidines and polyamidines
A method for scavenging hydrogen sulfide in an aqueous and/or hydrocarbon medium is disclosed. According to the method, the medium is contacted with an effective amount of an amidine selected from...
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5213680 |
Sweetening of oils using hexamethylenetetramine
Sour sulfhydryl-group containing oils are treated with an amount of hexamethylenetetramine effective to sweeten the oil and reduce headspace H 2 S to a desired level.
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5208164 |
Process for monitoring alkanolamine solutions
(a) An alkanolamine solution containing anions, a conductance probe connected through a meter to a recorder and a stirrer are provided in a container, (b) the solution is stirred at a constant rate...
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5200062 |
Process for removing elemental sulfur from fluids
A process for removing elemental sulfur from fluids such as refined petroleum products transported through pipelines for the transportation of sour hydrocarbon streams. The fluids are contacted...
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5190640 |
Treatment of oils using aminocarbinols
Sour sulfhydryl group containing oils and gases are treated with an effective amount of a sweetening, hydrogen sulfide quantity reducing aminocarbinol of the formula R 2 N--CH(--R 1 )OH wherein...
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H001147 |
Method of inhibiting corrosion in oil field produced fluids
A method for treating a hydrocarbon stream containing free sulfur wherein a formulation comprising a diaryldisulfide and a film forming corrosion inhibitor are introduced into the hydrocarbon stream.
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5183560 |
Treatment of oils using choline base
In accordance with this invention, a method is provided for decreasing hydrogen sulfide atmosphere, over sour heavy fuel oils to a predetermined acceptable level, which comprises treating such fuel...
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