Antifoulant Additive Patents (Class 208/48AA)
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Patent number: 5296130Abstract: In a process for upgrading heavy asphaltenic oil, a feed slurry of a heavy asphaltenic oil and less than 10 ppm of molybdenum, e.g. molybdenum naphthenate, is contacted with a hydrogen-rich gas in a hydroconversion zone at hydrocracking conditions to convert at least a portion of said heavy oil to lower boiling products. This is achieved with minimum coke formation under moderate processing conditions.Type: GrantFiled: January 6, 1993Date of Patent: March 22, 1994Assignee: Energy Mines and Resources CanadaInventors: Jaroslav F. Kriz, Marten Ternan
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Patent number: 5292425Abstract: Reaction products of polyalkenylsuccinimides with triazoles and aldehydes are used as effective antifoulants in liquid hydrocarbonaceous mediums, such as crude oils and gas oils, during processing of such liquids at elevated temperatures. The reaction products are formed via a two-step reaction in which a polyalkenylsuccinic anhydride precursor is reacted with an alkenylpolyamine to form a polyalkenylsuccinimide intermediate which, in turn, is reacted with a triazole and an aldehyde.Type: GrantFiled: October 21, 1992Date of Patent: March 8, 1994Assignee: Betz Laboratories, Inc.Inventor: David R. Forester
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Patent number: 5288394Abstract: An improved process for inhibiting the formation and deposition of polymer-based fouling materials after caustic scrubbing of hydrocarbon streams contaminated with oxygenated compounds with a basic washing solution having a pH>7 comprising adding to the hydrocarbon stream after caustic scrubbing a sufficient amount for inhibiting formation and deposition of polymer-based fouling materials of a composition comprising at least one hydrazide compound characterized by the formula ##STR1## where R is selected from the group consisting of H, NHNH.sub.Type: GrantFiled: July 1, 1992Date of Patent: February 22, 1994Assignee: Nalco Chemical CompanyInventors: Vincent E. Lewis, Carl T. Rowe
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Patent number: 5284574Abstract: A fluid coking-gasification process for converting heavy hydrocarbonaceous chargestocks to lower boiling products in which an inorganic metal composition is used to mitigate slagging in the gasifier, wherein the metal is selected from the alkaline-earths, the rare earths, and zirconium. The inorganic metal composition is added either directly into the gasifier or it is mixed with the coke passing from the heating zone to the gasification zone.Type: GrantFiled: March 12, 1992Date of Patent: February 8, 1994Assignee: Exxon Research and Engineering CompanyInventors: Tan-Jen Chen, Paul E. Eberly, Jr., Francis X. Mayer
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Patent number: 5284994Abstract: A liquid tin-containing antifoulant composition is injected into a metal-walled thermal cracking reactor tube, concurrently with the injection of a gaseous stream (preferably a steam-diluted C.sub.2 -C.sub.4 alkane stream), through a nozzle of an injection quill which is positioned in the center region of the reactor tube substantially parallel to the flow of the gaseous stream.A liquid tin-containing antifoulant is injected into a metal-walled thermal cracking reactor tube through a nozzle of an injection quill at a temperature of about 1000.degree.-1300.degree. F. while a gaseous stream (preferably a steam-diluted C.sub.2 -C.sub.4 alkane stream) flows through the reactor tube, followed by raising the temperature to about 1400.degree.-1800.degree. F. Preferably, the metal walls of the reactor tube are treated with steam after the antifoulant injection at about 1000.degree.-1300.degree. F. but before the antifoulant injection at about 1400.degree.-1800.degree. F.Type: GrantFiled: January 13, 1993Date of Patent: February 8, 1994Assignee: Phillips Petroleum CompanyInventors: Ronald E. Brown, K. James Sasaki, Larry E. Reed
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Patent number: 5282957Abstract: The present invention pertains to methods and compositions for inhibiting polymerization of hydrocarbons during processing and storage. The methods comprise adding an effective amount of a hydroxyalkylhydroxylamine compound to the hydrocarbon sought to be treated.Type: GrantFiled: August 19, 1992Date of Patent: February 1, 1994Assignee: Betz Laboratories, Inc.Inventors: Bruce E. Wright, Carl E. Weaver, Dwight K. Reid
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Patent number: 5282956Abstract: A method for the inhibition and removal Of ammonium chloride deposition in hydrocarbon processing units comprising adding to the hydrocarbon liquid an amide selected from the group consisting of dimethylformamide and 1,3-dimethyl-2-thiourea.Type: GrantFiled: July 7, 1992Date of Patent: February 1, 1994Assignee: Betz Laboratories, Inc.Inventor: Carl E. Weaver
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Patent number: 5283006Abstract: 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 adding to the hydrocarbon liquid being processed therein a tertiary amine, including trimethylamine and triethylamine.Type: GrantFiled: November 30, 1992Date of Patent: February 1, 1994Assignee: Betz Laboratories, Inc.Inventors: Scott E. Lehrer, James G. Edmondson
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Patent number: 5271824Abstract: Sulfur containing Mannich reaction product compounds are used as effective antifoulants in liquid hydrocarbonaceous mediums, such as crude and gas oil distillates during processing of such liquids at elevated temperatures.Type: GrantFiled: January 12, 1993Date of Patent: December 21, 1993Assignee: Betz Laboratories, Inc.Inventors: David R. Forester, Paul V. Roling
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Patent number: 5266186Abstract: The present invention provides a method for inhibiting fouling deposits in refinery processing equipment caused by the heat treatment of hydrocarbon feedstocks. The deposits are inhibited by adding to the feedstock an effective amount of an iron sulfide dispersant prepared in accordance with this invention. The dispersants comprise polyimides which are prepared by reacting fatty amines with maleic anhydride/alpha-olefin copolymers.Type: GrantFiled: December 11, 1990Date of Patent: November 30, 1993Assignee: Nalco Chemical CompanyInventor: Morris Kaplan
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Patent number: 5258113Abstract: Coke formation/deposition within and downstream of catalytic cracking reactors is suppressed by adding a coke suppressing additive to the cracking reactor and/or cracked product vapor. Free radical inhibitors, such as oxygenates, are preferred. The additive addition rate is preferably controlled based on temperature of regenerated catalyst, or a direct or indirect measurement of coke accumulation on the transfer line between the cracking reactor and the main fractionator.Type: GrantFiled: February 4, 1991Date of Patent: November 2, 1993Assignee: Mobil Oil CorporationInventors: Mary E. Edgerton, Ajit V. Sapre
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Patent number: 5256276Abstract: A method for the inhibition and removal of ammonium chloride deposition in hydrocarbon processing units comprising adding a phosphatide to the hydrocarbon liquid. A preferred phosphatide is lecithin.Type: GrantFiled: May 18, 1992Date of Patent: October 26, 1993Assignee: Betz Laboratories, Inc.Inventor: Carl E. Weaver
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Patent number: 5232577Abstract: A process for separation and removal of stable polycyclic aromatic dimer foulants from refinery process streams by blending a paraffinic stream with a portion of heavy effluent from a hydrocracking reactor to induce precipitation of foulant, which may then be separated and removed from the hydrocracker. Additional embodiments include introduction of flocculating agents and adjusting the temperature of the blend.Type: GrantFiled: August 14, 1990Date of Patent: August 3, 1993Assignee: Chevron Research and Technology CompanyInventors: John C. Fetzer, John M. Rosenbaum, Robert W. Bachtel, Dennis R. Cash, David G. Lammel
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Patent number: 5221498Abstract: Methods and compositions are provided for inhibiting the polymerization of a vinyl monomer during elevated processing thereof or during storage or shipment of the monomer containing product. The compositions comprise a combination of a dihydroxybenzene compound and an organic amine compound.Type: GrantFiled: July 22, 1991Date of Patent: June 22, 1993Assignee: Betz Laboratories, Inc.Inventors: Dwight K. Reid, Rosalie B. Hart
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Patent number: 5221461Abstract: A method for inhibiting fouling during the elevated temperature processing of hydrocarbon comprising adding to the hydrocarbon a composition comprising a catechol having the structure: ##STR1## wherein R is H or C.sub.1 -C.sub.10 alkyl and, an organic acid.Type: GrantFiled: June 9, 1992Date of Patent: June 22, 1993Assignee: Betz Laboratories, Inc.Inventors: Inge K. Henrici, Dwight K. Reid
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Patent number: 5221462Abstract: The present disclosure is directed to methods for controlling undesirable coke formation and deposition on structural surfaces which is commonly encountered during the high temperature processing of hydrocarbons. Coke formation can be inhibited by adding an effective amount of a dihydroxybenzene to the system suffering from coke formation.Type: GrantFiled: March 27, 1991Date of Patent: June 22, 1993Assignee: Betz Laboratories, Inc.Inventors: Dwight K. Reid, Daniel E. Fields
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Patent number: 5213679Abstract: Catalytic conversion of a hydrocarbon feedstock comprising a stage of catalytic cracking of a hydrocarbon feedstock, a stage of separation of the products of cracking from the catalytic mass, and a stage of regeneration and recycling of the catalytic mass and between the stage of regeneration of the catalytic mass and the stage of separation of the products of cracking there is injected continuously or intermittently, at one or more points, in admixture with at least one hydrocarbon to be treated, at least one diorganophosphite of the general formula ##STR1## where R.sub.1 and R.sub.2, which may be alike or different, are selected from the group consisting of alkyl, aryl or aralkyl groups having from 1 to 30 carbon atoms.Type: GrantFiled: October 15, 1990Date of Patent: May 25, 1993Assignee: Compagnie de Raffinage et de Distribution Total FranceInventors: Michael Bourgogne, Jean-Claude Courcelle, Claude Marty
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Patent number: 5213678Abstract: A method for inhibiting fouling in an organic process stream by adding certain oximes, hydrazine, erythorbic acid, carbohydrazide, or mixtures thereof. The antifoulant is added to the organic stream as an aqueous solution.Type: GrantFiled: February 8, 1991Date of Patent: May 25, 1993Assignee: Ashchem I.P., Inc.Inventors: Kaj D. Rondum, Guy A. DeVicaris, Dwight E. Emerich
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Patent number: 5211835Abstract: Partially glycolated polyalkenylsuccinimide-diisocyanate reaction products are used as effective antifoulants in liquid hydrocarbonaceous mediums, such as crude oils and gas oils, during processing of such liquids at elevated temperatures. The reaction products are formed via a three-step reaction in which a polyalkenylsuccinic anhydride precursor is reacted with an amine to form polyalkenylsuccinimide intermediate which, in turn, is reacted with glycolic acid to form a partially glycolated bis-alkenyl succinimide, followed by adding a diisocyanate to the succinimide.Type: GrantFiled: March 10, 1992Date of Patent: May 18, 1993Assignee: Betz Laboratories, Inc.Inventor: David R. Forester
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Patent number: 5211840Abstract: A process for adding an amine having a pKa of between 5 and 8 to a petroleum refinery distillation unit for the purpose of neutralizing acidic species contained in the hydrocarbon feedstock. The use of these amines raises the dew point pH sufficiently to prevent corrosion of the metallic surfaces of the overhead equipment while reducing the potential for the precipitation of amine salts.Type: GrantFiled: May 8, 1991Date of Patent: May 18, 1993Assignee: Betz Laboratories, Inc.Inventors: Scott E. Lehrer, James G. Edmondson
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Patent number: 5211834Abstract: Polyalkenylsuccinimide-boron compound reaction products are used as effective antifoulants in liquid hydrocarbonaceous mediums, such as crude oils and gas oils, during processing of such liquids at elevated temperatures. The reaction products are formed via a two-step reaction in which a polyalkenylsuccinic anhydride precursor is reacted with an amine to form polyalkenylsuccinimide intermediate which, in turn, is reacted with a boron compound.Type: GrantFiled: January 31, 1992Date of Patent: May 18, 1993Assignee: Betz Laboratories, Inc.Inventor: David R. Forester
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Patent number: 5211836Abstract: Reaction products of polyalkenyl succinic anhydrides with aromatic secondary amines, then further reacted with aminoalcohols are used as effective antifoulants in liquid hydrocarbonaceous mediums, such as crude oils and gas oils, during processing of such liquids at elevated temperatures. The reaction products are formed via a two-step reaction in which a polyalkenylsuccinic anhydride precursor is reacted with an aromatic secondary amine to form polyalkenylsuccinamide intermediate which, in turn, is reacted with an aminoalcohol.Type: GrantFiled: March 12, 1992Date of Patent: May 18, 1993Assignee: Betz Laboratories, Inc.Inventor: David R. Forester
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Patent number: 5196619Abstract: Inhibition of popcorn polymer growth by treatment with a sulfur-containing compound. The sulfur-containing compound can be added to organic material from which popcorn polymer is formed, or applied to extant popcorn polymer.Type: GrantFiled: January 29, 1991Date of Patent: March 23, 1993Inventors: Hsiang-ning Sun, John J. Cikut, Roque V. Martir, Jos P. Wristers
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Patent number: 5194620Abstract: Phosphorus derivatives of polyalkenylsuccinimides and methods of use of such derivatives as antifoulants in liquid hydrocarbonaceous mediums, such as crude oil, during processing at elevated temperatures are disclosed. The derivatives are formed via reaction of a polyalkenylsuccinimide intermediate with formaldehyde and a phosphorus compound having at least one acidic hydrogen P-H bond. The intermediate is first formed via reaction of polyalkenylsuccinic anhydride and polyamine.Type: GrantFiled: April 20, 1992Date of Patent: March 16, 1993Assignee: Betz Laboratories, Inc.Inventors: Paul V. Roling, David R. Foresteer, Bruce E. Wright
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Patent number: 5194143Abstract: A method for inhibiting the formation of polymeric based fouling deposits normally formed during the caustic washing to hydrocarbons is disclosed. The method comprises adding an effective amount for the purpose of an acetoacetate ester compound to the caustic wash system.Type: GrantFiled: November 18, 1991Date of Patent: March 16, 1993Assignee: Betz Laboratories, Inc.Inventor: Paul V. Roling
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Patent number: 5194142Abstract: Enaminones of polyalkenylsuccinimides are used as effective antifoulants in liquid hydrocarbonaceous mediums, such as crude oils and gas oils, during processing of such liquids at elevated temperatures. The enaminones are formed via reaction of polyalkenylsuccinimide and a dicarbonyl compound. The polyalkenylsuccinimide intermediate is first formed via reaction of polyalkenylsuccinic anhydride and polyamine.Type: GrantFiled: August 26, 1991Date of Patent: March 16, 1993Assignee: Betz Laboratories, Inc.Inventor: David R. Forester
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Patent number: 5186815Abstract: A method of decoking the inside walls of a hydrocarbon steam-cracking installation by means of solid particles of very small size, which particles are injected into the hydrocarbon feedstock flowing through tubes (12) of the steam-cracking furnace (10) and through indirect quench means (16). A cyclone (28) at the outlet from said indirect-quench means serving to separate the solid particles from the gaseous products and enabling the solid particles to be recycled through the installation after being mixed with a liquid or a gas and after their pressure has been raised. The invention also relates to a steam-cracking installation enabling the method to be performed.Type: GrantFiled: December 12, 1990Date of Patent: February 16, 1993Assignee: Procedes Petroliers et PetrochimiquesInventor: Eric Lenglet
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Patent number: 5183555Abstract: Glyoxylic acid/alkylphenol derivatives of polyalkenylsuccinimides are used as effective antifoulants in liquid hydrocarbonaceous mediums, such as crude and gas oil distillates during processing of such liquids at elevated temperatures.Type: GrantFiled: August 29, 1991Date of Patent: February 2, 1993Assignee: Betz Laboratories, Inc.Inventors: David R. Forester, Paul V. Roling
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Patent number: 5183554Abstract: Reaction products of (a) polyalkenylsuccinic anhydride; (b) secondary, aromatic amines, and (c) hindererd alcohols are used as effective antifoulants in liquid hydrocarbonaceous mediums, such as crude oils and gas oils, during processing of such liquids at elevated temperatures. The reaction products are formed via a two-step reaction in which the polyalkenylsuccinic anhydride is reacted with the secondary, aromatic amine as a first step. The resulting polyalkenylsuccinimide is then reacted with a hindererd alcohol to form the desired antifoulant.Type: GrantFiled: September 9, 1991Date of Patent: February 2, 1993Assignee: Betz Laboratories, Inc.Inventor: David R. Forester
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Patent number: 5173213Abstract: The corrosion and fouling of metal surfaces in contact with corrosive acid fluids or acid salts in the presence of an aqueous medium is reduced by contacting the surfaces with a composition which comprises (a) an anti-fouling amount of a hydroxyl amine compound of the formulaR.sub.1 R.sub.2 N--OHwherein R.sub.1 and R.sub.2 are independently hydrogen or a hydrocarbyl or inertly substituted hydrocarbyl or both R.sub.1 and R.sub.2 are collectively a divalent hydrocarbyl combined with said nitrogen to form a heterocyclic ring, and (b) a corrosion-inhibiting amount of a reaction product of or a mixture for the purpose of a reaction product of a polyalkylene polyamine and an alkynediol. The polyalkylene polyamine is one that contains from 2-10 amine groups, each separated from another by an alkylene group having from 2-6 carbon atoms. The alkynediol has from 2 to 6 carbon atoms.Type: GrantFiled: November 8, 1991Date of Patent: December 22, 1992Assignee: Baker Hughes IncorporatedInventors: Richard F. Miller, John Petersen
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Patent number: 5171420Abstract: Reaction products of (a) hydrocarbon substituted succinic acid or anhydride, (b) mono to hexa-hydroxy alcohols, (c) primary or secondary hydroxy substituted amines, (d) polyalkenylsuccinimide, and (e) a polyoxyalkyleneamine, are effective antifoulants in liquid hydrocarbonaceous mediums, such as in crude oils and gas oils. The reaction products are fed to the liquid hydrocarbon during elevated heat temperature processing of the hydrocarbon so as to inhibit fouling that would otherwise occur.Type: GrantFiled: September 9, 1991Date of Patent: December 15, 1992Assignee: Betz Laboratories, Inc.Inventor: David R. Forester
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Patent number: 5171421Abstract: Polyalkenylsuccinimide-maleic anhydride reaction products are used as effective antifoulants in liquid hydrocarbonaceous mediums, such as crude oils and gas oils, during processing of such liquids at elevated temperatures. The reaction products are formed via a two-step reaction in which a polyalkenylsuccinic anhydride precursor is reacted with an amine to form polyalkenylsuccinimide intermediate which, in turn, is reacted with maleic anhydride.Type: GrantFiled: September 9, 1991Date of Patent: December 15, 1992Assignee: Betz Laboratories, Inc.Inventor: David R. Forester
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Patent number: 5160425Abstract: A method for inhibiting the formation of fouling materials during the caustic washing of hydrocarbons contaminated with oxygen compounds is disclosed. The method comprises adding an effective amount of carbohydrazide to the caustic wash system.Type: GrantFiled: June 21, 1991Date of Patent: November 3, 1992Assignee: Nalco Chemical CompanyInventor: Vincent E. Lewis
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Patent number: 5158666Abstract: The present invention is directed to an antioxidant material and its use in petroleum and petrochemical processes to reduce and/or control fouling problems specifically as regards hydrocarbons having a bromine number of 10 or less and containing oxygen. The inventive antioxidant material is 1-(2-aminoethyl) piperazine.Type: GrantFiled: August 13, 1990Date of Patent: October 27, 1992Assignee: Betz Laboratories, Inc.Inventor: Dwight K. Reid
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Patent number: 5158667Abstract: This invention relates to processes for inhibiting fouling in fluid catalytic cracking units. The processes comprise adding to the hydrocarbon being processed a polymer formation inhibiting amount of aminoethyl piperazine.Type: GrantFiled: August 23, 1991Date of Patent: October 27, 1992Assignee: Betz Laboratories, Inc.Inventors: Raymon C. Barlow, Dwight K. Reid
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Patent number: 5156975Abstract: The methods and test kit of the present invention provide a fast, inexpensive, reproducible, simple, and accurate method for optimizing the dosage of an asphaltene dispersant antifouling agent for a given crude oil containing asphaltenes. A method is provided wherein a sample of the crude oil is diluted with a quantity of an aromatic organic solvent. To the diluted crude oil is added a known amount of the antifouling agent being evaluated. A portion of the diluted crude oil containing the antifouling agent is removed and mixed with a quantity of a liquid paraffinic hydrocarbon. The concentration of materials which remain dispersed in the liquid paraffinic hydrocarbon is measured. The inventive methods are useful to evaluate a single dose of an antifouling agent or may be used to simultaneously evaluate a plurality of doses in order to determine which dose is most effective for a given sample of crude oil.Type: GrantFiled: July 3, 1990Date of Patent: October 20, 1992Assignee: Nalco Chemical CompanyInventor: Mark A. Nelson
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Patent number: 5154817Abstract: Gum and sediment formation in liquid hydrocarbon mediums are inhibited by adding to the medium a branched or straight chain C.sub.1 -C.sub.8 aminoalcohol. The invention is particularly well-suited for use in hydrodesulfurizer processes wherein the hydrocarbon medium is typically a naphtha, diesel, kerosene, light gas and or residual fuel charge and the charge or medium is subjected to high temperature and pressure treatment in the presence of a catalyst. The invention also shows particular advantage in distillate fuels, such as in blended diesel fuels, both before and during heat treatment processing thereof.Type: GrantFiled: May 24, 1990Date of Patent: October 13, 1992Assignee: Betz Laboratories, Inc.Inventor: Dwight K. Reid
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Patent number: 5143594Abstract: An asphalt or asphaltene refinery anti-foulant technique comprising the use in crude oil, or crude oil fraction, streams of alkyl-substituted phenol formaldehyde liquid resins in combination with hydrophilic-lipophilic vinylic polymers. The polymeric anti-foulant is added to asphalt or asphaltene containing crude oil streams to prevent fouling of metallic, or other, i.e. ceramic, surfaces, especially heat transfer surfaces.Type: GrantFiled: November 12, 1991Date of Patent: September 1, 1992Assignee: Nalco Chemical CompanyInventors: William K. Stephenson, Bradley D. Mercer, David G. Comer
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Patent number: 5139643Abstract: Phosphorus derivatives of polyalkenylsuccinimides and methods of use of such derivatives as antifoulants in liquid hydrocarbonaceous mediums, such as crude oil, during processing at elevated temperatures are disclosed. The derivatives are formed via reaction of a polyalkenylsuccinimide intermediate with formaldehyde and a phosphorus compound having at least one acidic hydrogen P--H bond. The intermediate is first formed via reaction of polyalkenylsuccinic anhydride and polyamine.Type: GrantFiled: March 13, 1991Date of Patent: August 18, 1992Assignee: Betz Laboratories, Inc.Inventors: Paul V. Roling, David R. Forester, Bruce E. Wright
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Patent number: 5132225Abstract: Samples of a petroleum oil stream (e.g. crude oil feed stream to a refinery) are continually monitored to determine incompatible asphaltenes therein and the rate of antifoulant is adjusted in response to changes in the level of incompatible asphaltenes. The method of the present invention employs thin layer chromatographic films for separating incompatible asphaltenes and for measuring an optical property indicative of the incompatible asphaltenes, and for varying antifoulant addition in response to changes of the optical property measured.Type: GrantFiled: June 14, 1991Date of Patent: July 21, 1992Assignee: Exxon Chemical Patents Inc.Inventor: Ghazi B. Dickakian
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Patent number: 5128023Abstract: Methods and compositions are provided for inhibiting the formation and deposition of pyrolytic coke on metal surfaces in contact with a hydrocarbon feedstock undergoing pyrolytic processing. Coke inhibition is achieved by adding a coke inhibiting amount of a combination of a boron compound and a dihydroxybenzene compound.Type: GrantFiled: March 27, 1991Date of Patent: July 7, 1992Assignee: Betz Laboratories, Inc.Inventors: Dwight K. Reid, Daniel E. Fields
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Patent number: 5128022Abstract: Methods and compositions are provided for inhibiting the formation of polymers in petroleum or petrochemical processes that subsequently foul heat transfer surfaces. The compositions comprise a combination of N-Phenyl-N'-(1,3-dimethylbutyl)-p-phenylenediamine (PDA) and an organic acid. The methods comprise adding from 1 to 2500 ppm PDA and 1 to 3500 ppm organic acid to the system experiencing the fouling problem.Type: GrantFiled: January 18, 1991Date of Patent: July 7, 1992Assignee: Betz Laboratories, Inc.Inventor: Dwight K. Reid
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Patent number: 5114436Abstract: This invention relates to processes and compositions for stabilizing distillate fuel oil which comprises adding to the distillate fuel oil an effective stabilizing amount of a mixture of (a) a phosphite compound having the formula ##STR1## wherein R, R' and R" are the same or different and are alkyl, aryl, alkaryl or aralkyl groups, and (b) an effective carboxylic acid having from 2 to about 20 carbon atoms, wherein the weight ratio of (a):(b) is from about 1:5 to aboug 1000:1.Type: GrantFiled: April 20, 1987Date of Patent: May 19, 1992Assignee: Betz Laboratories, Inc.Inventor: Dwight K. Reid
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Patent number: 5100532Abstract: 2'-hydroxy-4' or 5'-alkylacetophenone oximes and 2-hydroxy-4 or 5-alkylbenzaldehyde oximes are used to deactivate iron species contained in hydrocarbon fluids. Left untreated, iron leads to decomposition of the hydrocarbon, resulting in the formation of gummy, polymer masses in the hydrocarbon liquid.Type: GrantFiled: December 5, 1990Date of Patent: March 31, 1992Assignee: Betz Laboratories, Inc.Inventors: Paul V. Roling, John E. Martin
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Patent number: 5039391Abstract: The present disclosure is directed to a composition and methods for controlling undesirable coke formation and deposition commonly encountered during the high temperature processing of hydrocarbons. Coke formation can be inhibited by adding a sufficient amount of a combination of a boron compound and a dihydroxyphenol.Type: GrantFiled: January 3, 1991Date of Patent: August 13, 1991Assignee: Betz Laboratories, Inc.Inventors: Dwight K. Reid, Daniel E. Fields
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Patent number: 5034114Abstract: Boiler fouling, particularly in air preheater section, is minimized by combining with a substance designed to neutralize acids a detergent builder such as the sodium, potassium and ammonium phosphates, polyphosphates, silicates, metasilicates, borates, metaborates and sesquicarbonates.Type: GrantFiled: July 28, 1989Date of Patent: July 23, 1991Inventor: Ira Kukin
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Patent number: 5015358Abstract: The formation of carbon on metals exposed to hydrocarbons in a thermal cracking process is reduced by contacting these metals with an antifoulant selected from the group consisting of a combination of titanium and tin and a combination of titanium and antimony.Type: GrantFiled: August 30, 1990Date of Patent: May 14, 1991Assignee: Phillips Petroleum CompanyInventors: Larry E. Reed, Randall A. Porter
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Patent number: 5000836Abstract: Methods and compounds for inhibiting coke formation in pyrolytic reactors and furnaces are disclosed wherein a molybdenum coke retarding treatment is used. Optionally, but preferably, a boron compound is used in conjunction with the molybdenum to provide optimal coke retarding performance.Type: GrantFiled: September 26, 1989Date of Patent: March 19, 1991Assignee: Betz Laboratories, Inc.Inventor: David R. Forester
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Patent number: 4964974Abstract: In a ebullated bed process, a residual hydrocarbon oil is hydrotreated at a reaction temperature of 750.degree. F. to 875.degree. F. and pressure of 1500 psig to 10,000 psig in a single or multiple reaction zone. A sample of hydrotreated liquid effluent is flash separated to obtain a nominal 650.degree. F.+ liquid which is magnified to 100.times.. Area precent, average diameter and maximum size of insoluble agglomerates is measured from the magnified view. Reactor temperature is varied with the area percent, average diameter and maximum size of insoluble agglomerates to control downstream sediment formation and plug formation at an acceptable level.Type: GrantFiled: November 20, 1989Date of Patent: October 23, 1990Assignee: Texaco Inc.Inventors: Glenn A. Clausen, Karen A. Kuhn, Kathryn P. Weldon
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Patent number: 4961840Abstract: An improved delayed coking process using an improved method for adding antifoam materials to the delayed coking process. The process is directed to injecting a polysiloxane antifoam material in mixture with an inert gas in the absence or substantial absence of steam and wherein this mixture is heated and thereafter injected into a delayed coking drum. The process allows improved use of antifoam materials and prevents downstream contamination of process units with silica materials which can be broken down when the polysiloxane antifoam material is contacted with large quantities of steam within the coking drum.Type: GrantFiled: April 13, 1989Date of Patent: October 9, 1990Assignee: Amoco CorporationInventor: Shri K. Goyal