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8177962 |
Metal corrosion inhibitor and hydrogen chloride formation inhibitor in a crude oil atmospheric distillation unit
The quaternary ammonium compound described by general formula 1 below (wherein R1, R2 and R3 are the same or different hydrocarbon radicals with 1 to 4 carbon atoms, and n is an integer between 1...
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8118994 |
Compositions, configurations, and methods of reducing naphtenic acid corrosivity
Naphthenic acid corrosivity of hydrocarbon feedstocks is correlated with the chemical composition of naphthenic acids, and especially with a ratio between an alpha fraction and a beta fraction of...
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8118995 |
Process for inhibiting fouling in hydrocarbon processing
A method for inhibiting the formation of fouling materials including contacting hydrocarbon media containing aldehyde compounds with an antifoulant while treating the hydrocarbon media with a basic...
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8062504 |
Method for reducing oil fouling in heat transfer equipment
A method of reducing asphaltene and particulate induced fouling during the thermal processing of petroleum oils utilizes resin extracts from HSDP crude oils to disperse and solubilize asphaltenes...
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8058493 |
Removing amines from hydrocarbon streams
Corrosive amine salts in hydrocarbon streams such as desalted crude oil streams can be prevented or avoided by adding certain amine scavenging chemicals to the streams to remove the amines...
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7927479 |
Focused beam reflectance measurement to optimize desalter performance and reduce downstream fouling
Performance of equipment, such as a desalter, in a refinery is monitored in real-time and on-line to minimize fouling of downstream equipment. Using an instrument to measure particles and droplets...
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7818156 |
Corrosion assessment method and system
A method includes assessing corrosion in a refinery operation having a piping network. Assessing can include identifying in a petroleum sample a presence and an amount of a species determined to be...
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7615144 |
Hydrocarbon thermal cracking using hardfaced fittings
A thermal cracking process that employs (1) a sinusoidal conduit in the convection section of a thermal cracking furnace, (2) a cross-over conduit, and/or (3) a transfer conduit that contains at...
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7585403 |
Dispersant of saline deposits in hydrocarbon process plants
Use of diaminopropanes, or of a composition thereof as a dispersing agent to prevent the formation or remove already formed deposits of ammonium salt in hydrocarbon process plants, such as...
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7575669 |
Method of removal of carbonyl compounds along with acid gases from cracked gas in ethylene process
A method for mitigating fouling in a wash unit used in a hydrocarbon cracking process wherein the fouling is due to the presence of polymers and deposits thereof formed by condensation of carbonyl...
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7566687 |
Methods and compositions for removing sulfur from liquid hydrocarbons
Improved desulfurization compositions are provided for removing substantial fractions of sulfur, sulfur complexes, and sulfur compounds from liquid hydrocarbons such as crude oil and fuels. The...
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7491318 |
Method for prevention of corrosion by naphthenic acids in refineries
The invention relates to a method for prevention of corrosion by naphthenic acids in a refinery comprising the use of a compound of the formula HS—B—COOR, where B is a saturated bivalent 1-18 C hyd...
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7381384 |
Insulating inserts for elevated temperature process vessels
Insulating members are provided for use in nozzles of elevated temperature process vessels employing a structural metal shell (24), an insulating refractory lining (14) and a corrosion-resistant...
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7381319 |
Multi-amine neutralizer blends
Amine and amine blend compositions neutralize acid environments in distillation overheads of hydrocarbon processing facilities. The neutralizers are composed of certain combinations of amines which...
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7354660 |
High performance alloys with improved metal dusting corrosion resistance
Alloy compositions which are resistant to metal dusting corrosion are provided by the present invention. Also provided are methods for preventing metal dusting on metal surfaces exposed to carbon...
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7279089 |
Method for preventing fouling and corrosion caused by ammonium chloride and ammonium sulphates
Method for preventing fouling and corrosion caused by ammonium chloride and ammonium sulphates, characterised in that it comprises injecting as an additive a choline or a derivative thereof.
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7202391 |
Process for inhibiting polymerization of an aromatic vinyl compound
According to the present invention, there is provided a process for inhibiting the polymerization of an aromatic vinyl compound which is capable of efficiently inhibiting the polymerization of an...
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7125483 |
Corrosion control in olefin production plants
A method for reducing acid corrosion and products of acid corrosion in a thermal cracking plant, the acid corrosion products being compounds of iron, chromium, nickel, lead, cadmium, manganese,...
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6986839 |
Method for prevention of fouling in basic solution by inhibiting polymerization and solubilizing deposits using amino acids
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...
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6902662 |
Method of reducing hydrolysis in hydrocarbon streams
A method of reducing hydrolysis in a hydrocarbon stream comprising adding to a hydrocarbon stream containing a chloride compound which undergoes hydrolysis at elevated temperatures in the presence...
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6821411 |
Steam injection system on the TLE cones of a hydrocarbon cracking furnace
A method is provided to inject steam into a hydrocarbon effluent passing through a transfer line exchanger (TLE) of a hydrocarbon cracking furnace to reduce the formation of a coke material on the...
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6767452 |
Process for treatment of petroleum acids
The invention is a process for decreasing the acidity of an organic acid containing petroleum oil, comprising contacting said petroleum oil containing organic acids with an effective amount of an...
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6679987 |
Process for decreasing the acid content and corrosivity of crudes
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...
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6652660 |
Method for treating hazardous and corrosion-inducing sulfur compounds
A method for treating compounds which contain reactive sulfur is disclosed, wherein the treatment produces compounds which contain sulfur in a non reactive form. The method is based on the use of...
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6551660 |
Method for removing reactive metal from a reactor system
A method for reducing catalyst contamination in a hydrocarbon conversion reactor system, comprising the steps of contacting at least a portion of a metal-coated hydrocarbon conversion reactor...
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6348145 |
Chromized refractory steel, a process for its production and its uses in anti-coking applications
Coated steel articles are described which exhibit anti-coking properties, and a process for producing such articles by depositing an anti-coking coating on a matrix constituted by a steel, in...
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6258256 |
Cracking processes
Methods for cracking hydrocarbons in reactor systems having improved resistances to carburization and coking. The reactor system comprises a steel portion having provided thereon a chromium...
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6258258 |
Process for treatment of petroleum acids with ammonia
The present invention is a process for decreasing the acidity of a starting acidic crude oil by contacting an acidic crude with an effective excess of ammonia dissolved in said crude to form an...
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6251305 |
Esterification of acidic crudes
The present invention relates to a process for reducing the acidity of a petroleum oil containing organic acids comprising treating said petroleum oil containing organic acids with an effective...
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6190541 |
Process for treatment of petroleum acids (LAW824)
The invention is a process for decreasing the acidity of an organic acid containing petroleum oil, comprising contacting said petroleum oil containing organic acids with an effective amount of an...
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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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6171521 |
Zwitterionic water-soluble substituted imine corrosion inhibitors
This invention is directed to a zwitterionic water-soluble imine of formula: ##STR1##wherein R1 is heterocyclyl, heteroaryl, aryl, arylalkyl, cycloalkyl or lower alkyl; R2 is alkyl, alkenyl,...
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6103100 |
Methods for inhibiting corrosion
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,...
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6086751 |
Thermal process for reducing total acid number of crude oil
TAN containing oils, e.g., crudes, are treated by flashing to remove substantially all of the water therefrom, thermally treating the recovered liquid to reduce the naphthenic acid content thereof,...
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6036888 |
Corrosion inhibitor 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 sulfur...
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6030523 |
Process for neutralization of petroleum acids (LAW810)
The present invention describes a process for decreasing the acidity of a starting calcium containing, non-acid treated acidic crude oil by adding such an acidic crude oil to an effective amount of...
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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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6022494 |
Process for decreasing the acid content and corrosivity of crudes
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5993607 |
Process for the purification of chlorinated aromatic hydrocarbons
In a process for the purification by distillation of chlorinated aromatic hydrocarbons originating from the chlorination of aromatic hydrocarbons in the presence of FeCl3, the crude reaction...
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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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5976359 |
Methods for reducing the concentration of amines in process and hydrocarbon fluids
Disclosed is a method for reducing the concentration of amines in hydrocarbon fluids and process streams by generating therein a nitrosating agent. The nitrosating agent will react with the amines...
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5965785 |
Amine blend neutralizers for refinery process corrosion
This invention relates to inhibiting corrosion in systems of condensing hydrocarbons which contain water and chlorides, and, more particularly, in the overhead of crude oil atmospheric pipestills,...
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5948238 |
Metal compounds as accelerators for petroleum acid esterification
The present invention relates to a process for reducing the acidity of a petroleum oil containing organic acids comprising treating said petroleum oil containing organic acids with an effective...
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5942654 |
Process for the removal of corrosive compounds from a fluid stream
A process for the removal of corrosive compounds from a fluid stream, comprising the steps of: in an extraction column with an outer steel tube and an inner tube of corrosion resistant material...
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5879540 |
Process for reducing corrosion in a system for separating aromatic hydrocarbons from a mixture with aliphatic hydrocarbons
Disclosed is a process for reducing corrosion in a system in which aromatic hydrocarbons are separated from a mixture with aliphatic hydrocarbons. The aromatic hydrocarbons are extracted from the...
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5863415 |
Control of naphthenic acid corrosion with thiophosporus compounds
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 a...
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5863418 |
Low-sulfur reforming process
Disclosed is a method for reforming hydrocarbons comprising contacting the hydrocarbons with a catalyst in a reactor system of improved resistance to carburization and metal dusting under...
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5858206 |
Process for improved water wash in FCC gas concentration units
Wash water is used to remove impurities such as hydrogen sulfide, ammonia, and hydrogen cyanide from light hydrocarbons and gases derived from refinery fluid catalytic cracking operations. The...
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5853619 |
Low toxic corrosion inhibitor
A low toxic corrosion inhibitor comprises (A) mercaptocarboxylic acid having from 2 to 6 carbon atoms, and (B) a polyamine/fatty acid/carboxylic acid adduct. The preferred combination of (A) and...
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5807842 |
Hydrocarbon processing in equipment having increased halide stree-corrosion cracking resistance
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...
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