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WO/2004/003110A1 |
A method for inhibiting and dissolving polymeric deposits on the internal surfaces of a caustic wash unit system in a hydrocarbon cracking process wherein said deposits result from polymerization of at least one component contained withi...
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WO/2003/093397A1 |
A method for inhibiting and dissolving the deposits formed on caustic or alkaline scrubbers used in scrubbing acidic gases such as carbon dioxide, hydrogen sulfide, which are formed during the pyrolytic cracking of naphtha, ethane, and p...
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WO/2003/072836A1 |
A copper-base alloy, which is resistant or immune to carburization, metal dusting and coking, resistant to oxidation and said alloy having the following composition (all contents in weight-%): Al > 0-15; Si ≥ 0-6; Mg ≥ 0-6, one or mo...
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WO/2003/072837A1 |
A copper−base alloy, which is resistant or immune to carburization, metal dusting and cooking, resistant to oxidation and said alloy having the following composition (all contents in weight−%): Al >0 − 15 Si ≥0 − 6 Mg ≥0 − ...
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WO/2003/016432A1 |
The levels of iron sulfide present in a conduit, such as a pipeline, are reduced by contacting the conduit, on an inner surface, with a composition obtained from an aqueous solution containing at least one compound of Formula (I) and at ...
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WO/2003/012253A2 |
A method of reducing the aggregation and deposition of asphaltene from a fluid containing asphaltene, such as crude oil, which method comprises the addition to the fluid of a compound of formula (I): wherein A is an optionally substitute...
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WO/2003/011507A1 |
An improved centrifugally-cast tube (10) is provided, along with a related method and apparatus (22) of making the tube (10). The tube (10) includes a plurality of grooves (20) and bosses (18) that are mechanically machined into an inter...
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WO/2003/006584A2 |
The present invention relates to a method for inhibiting high temperature corrosion of corrosion prone metal surfaces by organic acid-containing petroleum streams by providing an effective corrosion-inhibiting amount of triphenylstibine,...
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WO/2003/006580A2 |
The present invention relates to a method for inhibiting high temperature of corrosion-prone metal surfaces by organic acid-containing petroleum streams by providing an effective corrosion-inhibiting amount of phosphorous acid, typically...
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WO/2003/006581A2 |
The persent invention relates to a method for inhibiting corrosion of corrosion-prone metal surfaces by organic acid-containing petroleum streams by providing an effective corrosion-inhibiting amount of sulfur and phosphorus-free aromati...
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WO/2003/006579A1 |
In an embodiment, the invention relates to a method for reducing coke in agglomeration in petroleum streams derived form coking processes. In a preferred embodiment, the invention relates to a method for mitigating filter fouling in a co...
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WO/2003/006583A1 |
The present invention relates to a method for inhibiting high temperature corrosion of corrosion prone metal surfaces by organic acid-containing petroleum streams by providing an effective corrosion-inhibiting amount of an additive aroma...
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WO/2003/006582A1 |
The present invention relates to a method for inhibiting high temperature corrosion of corrosion prone metal surfaces by organic acid-containing petroleum streams by providing an effective corrosion-inhibiting amount of 4-sulfophthalic a...
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WO/2002/077132A1 |
A fuel additive for preventing slagging which comprises a composition comprising water and/or an oil and, dispersed stably therein, one or more of an aluminum compound, a silica compound, a titanium compound and a zirconium compound in t...
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WO/2002/034862A1 |
A method for minimizing the formation of polymers and other heavy molecular weight products upond heating a hydrocarbon stream in a hydroconversion process is described. Specifically, sufficient hydrogen containing gas (2) is added to th...
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WO/2002/014581A1 |
A method of reducing the formation of coke deposits on the heat-transfer surfaces of an ethylene dichloride to vinyl chloride pyrolysis furnace comprising exposing the heat transfer surfaces of said pyrolysis furnace to a phosphine selec...
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WO/2001/079396A1 |
The present invention is a process to reduce the fouling of equipment for processing petroleum feedstreams. The fouling is reduced by reducing the presence of peroxides and hydroperoxides in the feedstream. The steps of the process inclu...
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WO/2001/079390A1 |
The present invention is a process to reduce the fouling of equipment for processing petroleum feedstreams. The steps of the process include mixing the feedstream with an aqueous electrolyte forming an oil-in-water dispersion, passing th...
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WO/2001/055281A1 |
It has been discovered that various ester and ether reaction products are excellent asphaltene deposition inhibitors or dispersants for use in hydrocarbons such as crude oils. The asphaltene inhibiting compounds may be (1) esters formed ...
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WO/2001/047844A1 |
A composition comprising a nitroxide or dinitroxide and an aromatic amine is used as an additive for preventing polymeric fouling in petrochemical apparatuses for producing, storing, refining, fractionating, pressurizing and extracting o...
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WO/2001/040410A1 |
Petroleum additive formulations include a petroleum additive dissolved in a carrier fluid including at least one compound of the formula (I): (R?2¿)¿p?-Ph-(CH¿2?)¿m?-COO-(AO)¿n?-R?1¿ where; R?1¿ is C¿1? to C¿10? alkyl; AO is alk...
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WO/2001/040412A1 |
The present invention accordingly provides a petroleum fuel additive formulation which includes at least one petroleum fuel additive, particularly at least one paraffin wax pour point depressant and/or at least one dehazing agent dissolv...
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WO/2001/036563A1 |
A method for mitigating the condensation of liquid hydrocarbons and subsequent coke deposition in refinery reactor units by dew point suppression.
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WO/2001/036562A1 |
A method for removing or reducing coke deposits in a refinery reactor unit utilizing a reactant gas, preferably steam, and catalyst.
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WO/2001/027438A1 |
Described are compositions for preventing the precipitation of asphaltenes in crude oils or for removing solid asphaltene residues from the surface of production plants or the petroleum-containing formation surrounding the well in the pr...
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WO/2000/077121A1 |
The present invention is a method for mitigating the fouling from thermally cracked oils by minimizing the residence time at the temperature when the fouling is highest.
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WO/2000/061701A1 |
An antigelling agent for a hydrocarbon mixture containing a conjugated diene, which comprises (a) at least one compound selected from the group consisting of compounds having an NO radical in the molecule and precursors capable of formin...
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WO/2000/032546A1 |
The present invention is an asphaltene dispersant containing an aromatic, a sulfonic acid head, and an alkyl tail containing 16 carbons or more and at least one branch of a methyl or longer alkyl. Preferably, the aromatic is a fused two ...
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WO/2000/031006A1 |
The present invention includes a process for blending two or more petroleum oils, any component of which may be an unprocessed crude oil or a processed oil derived from petroleum, in a manner to minimize fouling and coking of refinery pr...
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WO/2000/022068A1 |
The invention concerns anti-coking coats for refractory alloys used in the oil industry. Said coats are obtained by a method comprising the following steps: 1) submitting the refractory alloy surface (5) to the action of an oxygen and/or...
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WO/2000/001785A1 |
Disclosed are methods and compositions for inhibiting corrosion in the overhead of a crude unit distillation tower by washing the crude oil with water containing a hydrophilic, polymeric, nitrogenous base, a di- or multivalent metallic b...
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WO/1999/061551A1 |
A process is provided by the invention which comprises: (a) providing a tubular reactor (28) having an inlet and an outlet, a furnace (30) for heating the reactor, and a cooler (32) having an inlet in communication with the reactor outle...
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WO/1999/041328A1 |
A method is disclosed for mitigating fouling and reducing viscosity in primary fractionators and quench sections of ethylene plants by adding to a hydrocarbon stream a mono and/or a polyalkyl-substituted phenol-formaldehyde resin having ...
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WO/1999/010448A1 |
The corrosion of metals in contact with an aqueous alkanolamine solution in an acid gas removal unit is inhibited by adding a corrosion inhibiting amount of an alkanemonothiol or alkanedithiol compound to the aqueous alkanolamine solutio...
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WO/1999/010445A1 |
The corrosion of metals in contact with aqueous alkanolamine solution in acid gas removal units is inhibited by maintaining in the alkanolamine solution a corrosion inhibiting amount of a thiodialkanol. The thiodialkanol is useful for in...
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WO/1999/010444A1 |
The corrosion of metals in contact with aqueous alkanolamine solution in acid gas removal units is inhibited by maintaining in the alkanolamine solution a corrosion inhibiting amount of a compound having formula (I) where R is S or O, an...
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WO/1998/040158A1 |
The present invention relates to a synergistic mixture containing 5 to 95 wt. % of a compound A of the formula (I) or (II) defined in the description, and 5 to 95 wt. % of the compound B of the formula (III) defined in the description as...
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WO/1998/033869A1 |
The present invention provides for methods for forming a durable, corrosion-inhibiting film on the surface of metals in crued oil processing systems by the periodic addition of a film forming phosphorus-containing compound. This periodic...
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WO/1998/028381A1 |
The present invention is directed to an aqueous amine resin corrosion inhibitor composition and methods of using the same for inhibiting corrosion in equipment in contact with alkanolamine, hot carbonate solutions, diglyme and/or other s...
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WO/1998/018885A1 |
The additive described consists essentially of a selected oxalkylated fatty amine or fatty amine derivative and a special mineral salt compound, preferably a metal soap. Said additive for heavy oils produces good emulsification and dispe...
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WO/1998/016718A2 |
The invention concerns the use of secondary alkanesulphonic acids as asphaltene dispersants in crude oils and products derived therefrom, the chain being between 8 and 22 carbon atoms long.
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WO/1998/016595A1 |
The invention concerns crude oils and products derived therefrom containing as asphaltene dispersants sarcosinates of general formula (I), in which R�1? designates C�7?-C�21? alkyl or alkenyl, and R�2? designates H or C�1?-C�...
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WO/1997/045503A1 |
Corrosion of iron-containing metal surfaces in a hydrocarbon fluid having a temperature of from about 175 �C to about 400 �C and containing a corrosive amount of naphthenic acid is inhibited by adding to the fluid or to a feed theref...
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WO/1997/045507A1 |
Compounds of formula (I) where R1 is a C10-C32 alkenyl group and R2 and R3 are (-OCH2CH2-)nOH, (-OCH2CHCH3-)nOH or -OCH2CHOHCH2OH in which n is an integer from 1 to 10 are lubricity and corrosion-prevention additives for fuels.
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WO/1997/036970A2 |
Process for the preparation of an aqueous tar suspoemulsion by mixing a mixture comprising: (a) a viscous tar composition formed from a tar, from inorganic solids and, optionally, from water; (b) water (W); (c) a surface-active agent (SA...
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WO/1997/028235A1 |
A hydrocarbon conversion process wherein austenitic stainless steel portions that are subject to halide stress-corrosion cracking conditions, such as the colder portions of the process equipment including effluent coolers, knockout drums...
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WO/1997/008271A1 |
The invention relates to a process for treating acidic crudes or fractions thereof to reduce or eliminate their corrosivity by addition of suitable amounts of Group IA or Group IIA oxides, hydroxides, hydroxides hydrates or naphthenate s...
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WO/1997/008270A1 |
The invention relates to processes for treating acidic crudes or fractions thereof to reduce or eliminate their acidity and corrosivity by addition of suitable amounts of Group IA or Group IIA oxides, hydroxides and hydrates. The process...
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WO/1994/015896A2 |
At least a portion of a hydrodealkylation reactor is treated with a carburization resistant composition, e.g. a film or coating applied to the base construction material; the reactor is operated under low sulfur conditions.
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JP2023518537A |
The present invention reduces prediction error, which corresponds to the sum of false predictions and lack of prediction, and allows better identification of operating parameters or characteristic values that may cause clogging. [Solutio...
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