Aqueous Acid Environment (i.e.,ph Less Than Or Equal To 4.1) Patents (Class 422/12)
  • Patent number: 9932478
    Abstract: The invention relates to a package of performance additives for bitumen or bituminous compositions including an acidic adjuvant and a H2S scavenger chosen from organic or inorganic copper salts. The invention also relates to the use of said H2S scavenger in order to reduce the H2S emissions of bitumen or of a bituminous composition treated with the acidic adjuvant. The invention additionally relates to a process for the preparation of a bituminous composition. The preparation process according to the invention makes it possible to obtain bitumen/crosslinked polymer compositions having better mechanical and dynamic properties in comparison with the bitumen/crosslinked polymer compositions of the prior art, while substantially reducing the releases of hydrogen sulfide (H2S).
    Type: Grant
    Filed: November 6, 2014
    Date of Patent: April 3, 2018
    Assignee: TOTAL MARKETING SERVICES
    Inventors: Mouhamad Mouazen, Romuald Botel
  • Patent number: 9765287
    Abstract: Stabilized hydrogen peroxide-containing compositions and methods of making same are disclosed. The compositions contain a stabilizer system made up of a disulfonate surfactant, a diester solvent, and a sulfonic acid or a salt thereof in a sufficient quantity to provide the stabilized hydrogen peroxide with an acidic pH value. The compositions are suitable for use as disinfectants, as cleaning agents, and in various personal care applications such as hair care and tooth whitening.
    Type: Grant
    Filed: June 3, 2015
    Date of Patent: September 19, 2017
    Assignee: Metrex Research Corporation
    Inventors: Abhigyan Som, Harish Jani
  • Patent number: 9719035
    Abstract: Corrosion induced by the presence of naphthenic acids in hydrocarbon fluids, particularly where such fluids are at elevated temperatures, may be inhibited or controlled through use of corrosion inhibiting compositions comprising a combination of a minor portion of a phosphorus-based constituent and a major portion of a sulfur-based constituent, nitrogen-based constituent, or combination thereof. In another embodiment the sulfur-based constituent and/or nitrogen-based constituent may be used without any phosphorus-based constituent. Where the compounds are appropriately selected, the compositions may inhibit corrosion to a degree comparable or nearly comparable to the inhibition provided by an equal amount of some conventional phosphorus-based compounds alone, but are significantly less likely to impair catalyst activity in downstream cracking and refinery operations.
    Type: Grant
    Filed: June 24, 2013
    Date of Patent: August 1, 2017
    Assignee: Baker Hughes Incorporated
    Inventors: Michael J. Zetlmeisl, Bradley G. Harrell, Bradley G. Borgard, Scott Bieber
  • Patent number: 9603875
    Abstract: A method of making a consumable product containing purified embryonated Trichuris suis ova (TSO) preferably includes steps of: storing the TSO in an acidic solution; adding a food preservative to the acidic solution to produce a preservative-acid-solution; forming a mixing solution by raising the pH of the preservative-acidic-solution to match the pH of a food substance by titrating the preservative-acidic-solution with an acid neutralizer so that the pH changes at a rate of not more than 1 pH unit per 24 hours, preferably to a pH not higher than 5.0; and producing the consumable product by combining the mixing solution and the food substance while maintaining the temperature of the consumable product between 1 degree Centigrade and 47 degrees Centigrade.
    Type: Grant
    Filed: January 7, 2016
    Date of Patent: March 28, 2017
    Assignee: NeuOva, LLC
    Inventors: Stephan D. Glenn, Daniel T. Gregory, Jr., Roy A. Stimits, Frank Detlev Goj
  • Patent number: 9487674
    Abstract: A chemical mechanical polishing (CMP) composition comprising (A) inorganic particles, organic particles, or a mixture or composite thereof, (B) a glycoside of the formulae 1 to 6 wherein R1 is alkyl, aryl, or alkylaryl, R2 is H, X1, X2, X3, X4, X5, X6, alkyl, aryl, or alkylaryl, R3 is H, X1, X2, X3, X4, X5, X6, alkyl, aryl, or alkylaryl, R4 is H, X1, X2, X3, X4, X5, X6, alkyl, aryl, or alkylaryl, R5 is H, X1, X2, X3, X4, X5, X6, alkyl, aryl, or alkylaryl, and the total number of monosaccharide units (X1, X2, X3, X4, X5, or X6) in the glycoside is in the range of from 1 to 20, and (C) an aqueous medium.
    Type: Grant
    Filed: September 4, 2012
    Date of Patent: November 8, 2016
    Assignee: BASF SE
    Inventors: Yuzhuo Li, Ning Gao, Michael Lauter, Roland Lange
  • Patent number: 9243333
    Abstract: This invention relates to galvanic aluminum alloy powder-pigments coated with semi-conducting corrosion inhibiting compositions and to the process for preparing said coated powder-pigments for coating metal substrates to inhibit corrosion. The coated aluminum alloy powder-pigments are electrically active and prevent corrosion of metals which are more cathodic (electropositive) than the coated aluminum alloy pigments.
    Type: Grant
    Filed: September 27, 2012
    Date of Patent: January 26, 2016
    Assignee: The United States of America, as represented by the Secretary of the Navy
    Inventors: Craig Matzdorf, William Nickerson
  • Patent number: 9242863
    Abstract: Processes and reagents for inhibiting or eliminating scale formation during wet-process phosphoric acid production are provided and include adding to a wet-process phosphoric acid production stream a scale inhibiting amount of a reagent having an aliphatic or aromatic compound containing at least two hydroxy groups, and at least one amine.
    Type: Grant
    Filed: September 23, 2010
    Date of Patent: January 26, 2016
    Assignee: CYTEC TECHNOLOGY CORP.
    Inventors: Sathanjheri A. Ravishankar, Bing Wang
  • Patent number: 9034209
    Abstract: Corrosion protection formulation comprising (A) from 0.01 to 5% by weight of alkylamine ethoxylates as surfactant component, (B) from 0.01 to 10% by weight of corrosion inhibitors, (C) from 0 to 0.3% by weight of thickeners, (D) from 5 to <75% by weight of freezing point-lowering alcohols selected from among alkanols, glycols, polyalkylene glycols and glycerol, (E) from 5 to 90% by weight of vegetable and/or fatty oils, (F) from 0 to 5% by weight of water and (G) from 0 to 5% by weight of conventional emulsifiers. The formulation is particularly suitable for protecting zinc or zinc-plated components or surfaces or cadmium or cadmium-plated metallic surfaces against corrosion caused by runway deicing compositions used at airports.
    Type: Grant
    Filed: August 19, 2013
    Date of Patent: May 19, 2015
    Assignee: BASF SE
    Inventors: Harald Dietl, Uwe Nitzschke
  • Patent number: 9028747
    Abstract: Water treatment compositions are provided that are effective for mitigating corrosion or fouling of surfaces in contact with aqueous systems. The water treatment compositions can include one or more azole compounds, one or more transition metals, and one or more dispersants, in addition to various other additives. The water treatment compositions can exclude phosphorus and still be effective. Methods for mitigating corrosion or fouling of a surface in an aqueous system are also provided.
    Type: Grant
    Filed: December 28, 2012
    Date of Patent: May 12, 2015
    Assignee: Ecolab USA Inc.
    Inventor: Jasbir S. Gill
  • Patent number: 9017700
    Abstract: The present application describes a novel, advantageous purification method which guarantees the embryonation capability and the viability of a worm egg suspension. The T. suis worm eggs are first treated in a non-embryonated condition in a sulfuric acid solution at about =ph 2. Bacteria and viruses are thereby killed successfully. The germination number of yeasts and fungi is reduced. In a second step, the pH-value is increased and an orally tolerated preservative is added. Yeasts and fungi are thereby killed successfully. The suspension medium used in the second purification step can then be used as a culture medium for additional production (embryonation) and storage.
    Type: Grant
    Filed: March 31, 2008
    Date of Patent: April 28, 2015
    Assignee: Dr. Falk Pharma GmbH
    Inventors: Rudolf Wilhelm, Allan Kund Roepstorff, Christian Moliin Outzen Kapel
  • Patent number: 8980173
    Abstract: Disclosed are systems and methods for monitoring and controlling a real-time oxidation-reduction potential in a hot water system to inhibit corrosion in the hot water system. The method includes defining one or more operational protective zones in the hot water system. One or more of the operational protective zones includes an oxidation-reduction potential probe that is operable to measure a real-time oxidation-reduction potential in the hot water system at operating temperature and pressure. The probe transmits the measured real-time potential to the controller, which assesses and interprets the transmitted potential to determine whether it conforms to an oxidation-reduction potential setting. If the measured potential does not conform the oxidation-reduction potential setting, the controller is operable to feed or remove one or more active chemical species into or from the hot water system and further operable to change at least one system parameter.
    Type: Grant
    Filed: February 21, 2013
    Date of Patent: March 17, 2015
    Assignee: Nalco Company
    Inventors: Jeffrey V. Fox, George T. Totura, Peter Hicks, David A. Grattan, Martin Godfrey
  • Patent number: 8940227
    Abstract: The present invention relates to the use of a polyesteramine or a polyester polyquaternary ammonium compound as a corrosion inhibitor for metal surfaces, and to a method for protecting a metal surface from corrosion by contacting the metal surface with said corrosion inhibitor.
    Type: Grant
    Filed: August 26, 2011
    Date of Patent: January 27, 2015
    Assignee: Akzo Nobel Chemical International B.V.
    Inventors: Per-Erik Hellberg, Natalija Gorochovceva
  • Publication number: 20150010429
    Abstract: The invention provides the use of a surfactant as a corrosion inhibitor, wherein the surfactant is selected from derivatives of alkyl polyglucosides and derivatives of terpene alkoxylates, and mixtures thereof, provided that the derivatives are not sulfosuccinates. Also provided is a method of preventing or reducing corrosion of a metal component that is in contact with, or will be in contact with, an aqueous fluid, wherein the method comprises providing a surfactant and applying the surfactant to the metal component or adding the surfactant to the aqueous fluid that is in contact with, or will be in contact with, the metal component, wherein the surfactant is selected from derivatives of alkyl polyglucosides and derivatives of terpene alkoxylates, and mixtures thereof, provided that the derivatives are not sulfosuccinates.
    Type: Application
    Filed: January 30, 2013
    Publication date: January 8, 2015
    Inventors: Kevan Hatchman, Alan Fellows, Christopher Raymond Jones, Gareth Collins
  • Patent number: 8865309
    Abstract: The present invention includes compositions and methods of supplying a corrosion inhibitor including placing a corrosion inhibitor attached to a nanostructure carrier, placing the nanostructure carrier containing the corrosion inhibitor at a location and the nanostructure carrier is capable of releasing the corrosion inhibitor.
    Type: Grant
    Filed: January 28, 2013
    Date of Patent: October 21, 2014
    Assignee: National Oilwell Varco, L.P.
    Inventors: Deepthi R. Setlur, Stefan M. Butuc
  • Patent number: 8833450
    Abstract: The present invention relates to nitrogen-containing hydroxyethyl substituted compounds to be used as corrosion inhibitors for metal surfaces, for example in aqueous systems and in particular in oil-field applications, e.g. in oil or gas wells, and which could be used under sweet-well conditions as well as under sour-well conditions. It may also be used in oil-field acidizing and fracture-acidizing well stimulation treatment. The compounds belong to the group of partly ethoxylated fatty alkylamines, partly ethoxylated alkyletheramines and partly or fully hydroxyethyl substituted alkylamidopropylamines.
    Type: Grant
    Filed: April 12, 2013
    Date of Patent: September 16, 2014
    Assignee: Akzo Nobel N.V.
    Inventors: Kornelis Overkempe, William John Ernest Parr, Johanna Christina Speelman
  • Patent number: 8758789
    Abstract: The present invention relates to compositions including medium chain peroxycarboxylic acid, methods for making these compositions, and methods for reducing the population of a microorganism. The compositions can include advantageously high levels of the medium chain peroxycarboxylic acid, can be readily made, and/or can exhibit reduced odor.
    Type: Grant
    Filed: October 22, 2012
    Date of Patent: June 24, 2014
    Assignee: Ecolab USA Inc.
    Inventors: Victor F. Man, Joshua P. Magnuson, Steven E. Lentsch
  • Publication number: 20140135239
    Abstract: The present invention provides the use of a sulfosuccinate as a corrosion inhibitor. In particular, the sulfosuccinate may be used to inhibit the corrosion of a metal component that is, or will be, in contact with an aqueous fluid, in order to prevent or reduce corrosion of the metal component. The sulfosuccinate may be used to inhibit corrosion of a metal component in an industrial aqueous system, such as a hydrocarbon plant; a chemical plant; a water plant; or a paper manufacturing plant, and in particular in an oilfield system or a downstream oil-related system.
    Type: Application
    Filed: December 8, 2011
    Publication date: May 15, 2014
    Applicant: Rhodia Operations
    Inventors: Alan Fellows, Kevan Hatchman, Chris Jones
  • Publication number: 20140119984
    Abstract: Acidic fluids used in wells or pipelines cause corrosion of carbon steel. Methods for inhibiting corrosion include contacting carbon steel with a fluid having an aqueous acidic phase including a material selected from the group consisting of: a material of a plant in the Solanaceae family, an extract of a material of a plant in the Solanaceae family, a withanolide, a source of a withanolide, a withanolide derivative, a source of a withanolide derivative, and any combination thereof. The methods have wide application in various kinds of operations involved in the production or transportation of oil and gas, such as acid stimulation in a well or remedial treatment in a pipeline.
    Type: Application
    Filed: October 29, 2012
    Publication date: May 1, 2014
    Applicant: HALLIBURTON ENERGY SERVICES, INC.
    Inventors: Ravikant S. Belakshe, Lalit Pandurang Salgaonkar, Achala V. Danait
  • Patent number: 8580154
    Abstract: Disclosed are quaternary ammonium salts containing non-halogen anions such as carbonates, bicarbonates, phosphates, glycolates and mixtures thereof as conversion coatings or additives imparting anti-corrosive properties to paints. The invention relates to a method for inhibiting the corrosion of metal surfaces by applying a composition containing one or more quaternary ammonium carbonate or bicarbonate. The disclosure is also directed to anti-corrosive coatings for metal substrates containing these compounds and to metal substrates having these anticorrosive coatings.
    Type: Grant
    Filed: December 24, 2012
    Date of Patent: November 12, 2013
    Assignee: Lonza, Inc.
    Inventors: Thomas C. Bedard, Thomas David Burleigh, Larry K. Hall, Joseph Kimler, Joseph W. Scheblein, Michael Y. Chiang
  • Patent number: 8577492
    Abstract: Transport scheduling and transport processes for low microbial (“LM”) bulk products are described. The transport scheduling and processes facilitate low microbial activity in a LM bulk product during the transport of the LM bulk product.
    Type: Grant
    Filed: January 4, 2012
    Date of Patent: November 5, 2013
    Inventors: Robert Mariniello, Edith D. Akins-Lewenthal, Benjamin Warren, Ryan T. Grace
  • Patent number: 8577491
    Abstract: Transport scheduling and transport processes for low microbial (“LM”) bulk products are described. The transport scheduling and processes facilitate low microbial activity in a LM bulk product during the transport of the LM bulk product.
    Type: Grant
    Filed: January 4, 2012
    Date of Patent: November 5, 2013
    Assignee: ConAgra Foods Food Ingredients Company, Inc
    Inventors: Robert Mariniello, Edith D. Akins-Lewenthal, Benjamin Warren, Ryan T. Grace
  • Patent number: 8577490
    Abstract: Transport scheduling and transport processes for low microbial (“LM”) bulk products are described. The transport scheduling and processes facilitate low microbial activity in a LM bulk product during the transport of the LM bulk product.
    Type: Grant
    Filed: January 20, 2011
    Date of Patent: November 5, 2013
    Inventors: Robert Mariniello, Edith D. Akins-Lewenthal, Benjamin Warren, Ryan T. Grace
  • Publication number: 20130233543
    Abstract: The present invention relates to nitrogen-containing hydroxyethyl substituted compounds to be used as corrosion inhibitors for metal surfaces, for example in aqueous systems and in particular in oil-field applications, e.g. in oil or gas wells, and which could be used under sweet-well conditions as well as under sour-well conditions. It may also be used in oil-field acidizing and fracture-acidizing well stimulation treatment. The compounds belong to the group of partly ethoxylated fatty alkylamines, partly ethoxylated alkyletheramines and partly or fully hydroxyethyl substituted alkylamidopropylamines.
    Type: Application
    Filed: April 12, 2013
    Publication date: September 12, 2013
    Applicant: Akzo Nobel N.V.
    Inventors: Kornelis OVERKEMPE, William John Ernest PARR, Johanna Christina SPEELMAN
  • Patent number: 8404181
    Abstract: The present invention relates to a method of preventing or alleviating the problems associated with corrosion and to novel formulations for use in such a method.
    Type: Grant
    Filed: November 9, 2006
    Date of Patent: March 26, 2013
    Assignee: Rhodia UK Limited
    Inventors: Chris Jones, Julie Hardy
  • Patent number: 8383559
    Abstract: The present invention includes compositions and methods of supplying a corrosion inhibitor including placing a corrosion inhibitor attached to a nanostructure carrier, placing the nanostructure carrier containing the corrosion inhibitor at a location and the nanostructure carrier is capable of releasing the corrosion inhibitor.
    Type: Grant
    Filed: October 13, 2010
    Date of Patent: February 26, 2013
    Assignee: National Oilwell Varco, L.P.
    Inventors: Deepthi R. Setlur, Stefan M. Butuc
  • Patent number: 8337640
    Abstract: Disclosed are quaternary ammonium salts containing non-halogen anions such as carbonates, bicarbonates, phosphates, glycolates and mixtures thereof as conversion coatings or additives imparting anti-corrosive properties to paints. The invention relates to a method for inhibiting the corrosion of metal surfaces by applying a composition containing one or more quaternary ammonium carbonate or bicarbonate. The disclosure is also directed to anti-corrosive coatings for metal substrates containing these compounds and to metal substrates having these anticorrosive coatings.
    Type: Grant
    Filed: November 23, 2010
    Date of Patent: December 25, 2012
    Assignee: Lonza, Inc.
    Inventors: Thomas C. Bedard, Thomas David Burleigh, Larry K. Hall, Joseph Kimler, Joseph W. Scheblein, Michael Y. Chiang
  • Patent number: 8318085
    Abstract: Methods of inhibiting the corrosion of a metal surface contacted by an aqueous acid solution. The methods combine a corrosion inhibiting composition with the aqueous acid solution, wherein the corrosion inhibiting composition comprises a reaction product of an alpha,beta-unsaturated ketone with a primary or secondary amine. The metal surface is then contacted with the aqueous acid solution comprising the corrosion inhibiting composition, thereby inhibiting corrosion thereon.
    Type: Grant
    Filed: October 18, 2011
    Date of Patent: November 27, 2012
    Assignee: Halliburton Energy Services, Inc.
    Inventors: Juanita M. Cassidy, Keith A. Frost
  • Patent number: 8282974
    Abstract: A method for de-soiling and disinfecting produce, the method including: treating the produce with a catholyte solution to yield a catholyte treated produce; sonicating the catholyte treated produce to yield a sonicated produce; and treating the sonicated produce with an anolyte solution.
    Type: Grant
    Filed: September 17, 2010
    Date of Patent: October 9, 2012
    Assignee: Dole Fresh Vegetables, Inc.
    Inventors: Thomas W. Johnson, Bob J. Dull
  • Patent number: 8216850
    Abstract: Disclosed are nucleic acid-based molecular switches that respond to changes in pH. The switches may be used in DNA nanodevices. The switches may also act as sensors for measuring the pH of a sample, including cells, regions thereof, and whole organisms. The switch includes an A-motif that forms at acidic pH. Also disclosed are compositions and methods for measuring the pH of cells or regions thereof, such as vesicles, the nucleus, mitochondrial matrix, or the Golgi lumen.
    Type: Grant
    Filed: August 12, 2011
    Date of Patent: July 10, 2012
    Assignee: National Center for Biological Sciences
    Inventors: Yamuna Krishnan, Saikat Chakraborty
  • Patent number: 8153437
    Abstract: Disclosed are nucleic acid-based molecular switches that respond to changes in pH. The switches may be used in DNA nanodevices. The switches may also act as sensors for measuring the pH of a sample, including cells, regions thereof, and whole organisms. The switch includes an A-motif that forms at acidic pH. Also disclosed are compositions and methods for measuring the pH of cells or regions thereof, such as vesicles, the nucleus, mitochondrial matrix, or the Golgi lumen.
    Type: Grant
    Filed: March 10, 2010
    Date of Patent: April 10, 2012
    Assignee: National Center for Biological Sciences
    Inventors: Yamuna Krishnan, Saikat Chakraborty
  • Publication number: 20120045361
    Abstract: The present invention relates to inhibition of high temperature naphthenic acid corrosion occurring in hydrocarbon processing units.
    Type: Application
    Filed: April 15, 2010
    Publication date: February 23, 2012
    Applicant: DORF KETAL CHEMICALS (I) PRIVATE LIMITED
    Inventor: Mahesh Subramaniyam
  • Patent number: 8119573
    Abstract: Provided is an anticorrosive composition for use in aqueous salt solutions. The composition contains an antimony compound and at least two other components selected from morpholine derivatives, acetylenic alcohols, ascorbic acid derivatives, and selenium compounds. The composition is particularly useful for inhibiting corrosion of metallic surfaces of drilling devices or refrigeration systems that are in contact with salt brines at elevated temperatures.
    Type: Grant
    Filed: February 12, 2007
    Date of Patent: February 21, 2012
    Assignee: Bromine Compounds Ltd.
    Inventors: Serge Gutman, Sharon Krumbein, David Itzhak, Mira Bergstein Freiberg
  • Publication number: 20120035086
    Abstract: Methods of inhibiting the corrosion of a metal surface contacted by an aqueous acid solution. The methods combine a corrosion inhibiting composition with the aqueous acid solution, wherein the corrosion inhibiting composition comprises a reaction product of an alpha,beta-unsaturated ketone with a primary or secondary amine. The metal surface is then contacted with the aqueous acid solution comprising the corrosion inhibiting composition, thereby inhibiting corrosion thereon.
    Type: Application
    Filed: October 18, 2011
    Publication date: February 9, 2012
    Applicant: Halliburton Energy Services, Inc.
    Inventors: Juanita M. Cassidy, Keith A. Frost
  • Patent number: 8105988
    Abstract: One or more methods for inhibiting corrosion in a fluid that contain a composition with a specified generic formula are disclosed. The fluid can be contained in an oil or gas pipeline or refinery.
    Type: Grant
    Filed: March 9, 2009
    Date of Patent: January 31, 2012
    Assignee: Nalco Company
    Inventors: Erick J. Acosta, Jeffery Caleb Clark
  • Patent number: 8105987
    Abstract: One or more methods for inhibiting corrosion in an aqueous medium that contain a composition with a specified generic formula are disclosed. The aqueous medium can be contained in an oil or gas pipeline or refinery.
    Type: Grant
    Filed: October 6, 2008
    Date of Patent: January 31, 2012
    Assignee: Nalco Company
    Inventors: Erick J. Acosta, Jeffery Caleb Clark
  • Patent number: 8101125
    Abstract: A method and system for reducing corrosion in a turbomachine. The method may include providing a process gas to a condenser, wherein the process gas contains a condensate having a pH level that is acidic. The condenser may be configured to remove at least a portion of the condensate from the process gas. Any condensate that is not removed is a remaining condensate. The method may further include increasing the pH level of the remaining condensate to above about 4 by mixing the process gas and the remaining condensate with an amount of pH modifier to form a mixture, and directing the mixture to a compressor coupled to the condenser, wherein the compressor is configured to compress the mixture.
    Type: Grant
    Filed: May 27, 2009
    Date of Patent: January 24, 2012
    Assignee: Dresser-Rand Company
    Inventors: Robert R. Odle, David C. Seib
  • Patent number: 8066902
    Abstract: Disclosed are coolants comprising brazed metal corrosion inhibitors. In one embodiment, the disclosed brazed metal corrosion inhibitor will comprise a polycarboxylic acid functional compound having the structure: wherein R1, R2, R3, and R4 are each independently selected from the group consisting of H, OH, COOH, C1-C10alkyl groups, glycol esters, anhydride groups, —COOM, and combinations thereof, wherein M is at least one of H, alkali metal ions, alkali earth metal ions, NH4+, amines, imidazoline, polyalcohol esters, C1 to C12 alkyl groups, and combinations thereof; wherein (1) at least three of R1, R2, R3, and R4 contain the group —COOM, wherein M is defined above; or (2) at least two of R1, R2, R3, and R4 contain an anhydride group, and at least one of R1, R2, R3, and R4 contain the group —COOM, wherein M is defined above.
    Type: Grant
    Filed: June 26, 2006
    Date of Patent: November 29, 2011
    Assignee: Prestone Products Corporation
    Inventors: Bo Yang, Peter M. Woyciesjes, Aleksei V. Gershun, Filipe J. Marinho
  • Patent number: 8062586
    Abstract: Methods and compositions are provided that inhibit the corrosion of metal surfaces by aqueous acid solutions. The inhibition is basically achieved by the addition of a reaction product of an alpha, beta-unsaturated aldehyde or ketone with a primary or secondary amine to the aqueous acid solution.
    Type: Grant
    Filed: November 19, 2009
    Date of Patent: November 22, 2011
    Assignee: Halliburton Energy Services, Inc.
    Inventors: Juanita M. Cassidy, Keith A. Frost
  • Patent number: 8022017
    Abstract: Corrosion of metallic tubulars in an oil, gas or geothermal well may be inhibited by introducing into the well a dithiazine of the formula: wherein R is selected from the group consisting of a C1 to C10 saturated or unsaturated hydrocarbyl group or a C1 to C10 ?-hydroxy saturated or unsaturated hydrocarbyl group. The dithiazine may be isolated from a whole spent fluid formed by reaction of hydrogen sulfide and a triazine. Alternately, the whole spent fluid containing the dithiazine may be introduced into the well. In addition, the dithiazine or whole spent fluid may be formulated with at least one component selected from alkyl, alkylaryl or arylamine quaternary salts; mono or polycyclic aromatic amine salts; imidazoline derivative or a quaternary salt thereof; a mono-, di- or trialkyl or alkylaryl phosphate ester; or a monomeric or oligomeric fatty acid.
    Type: Grant
    Filed: December 21, 2009
    Date of Patent: September 20, 2011
    Assignee: Baker Hughes Incorporated
    Inventor: Grahame Nigel Taylor
  • Patent number: 8022018
    Abstract: Corrosion of metallic tubulars in an oil, gas or geothermal well may be inhibited by introducing into the well a dithiazine or dithiazine of the formula: wherein R is selected from the group consisting of a C1 to C12 saturated or unsaturated hydrocarbyl group or a C1 to C10 ?-hydroxy saturated or unsaturated hydrocarbyl group; R1 is selected from the group consisting of a C1-C24 straight chain or branched alkyl group or a C1-C24 arylalkyl; R2 is selected from the group consisting of X-R4-X, R4 being a C1-C6 alkyl group; and X is chlorine, bromine or iodine. The dithiazine may he isolated from a whole spent fluid formed by reaction of hydrogen sulfide and a triazine. Alternately, the whole spent fluid containing the dithiazine may be introduced into the well. The dithiazines of formulae (II) and (III) are quaternized derivatives of the dithiazine of formula (I).
    Type: Grant
    Filed: August 24, 2010
    Date of Patent: September 20, 2011
    Assignee: Baker Hughes Incorporated
    Inventor: Grahame Nigel Taylor
  • Patent number: 7989403
    Abstract: A method of inhibiting corrosion in a fluid is disclosed. The method comprises: adding to the fluid an effective corrosion inhibiting amount of a synergist, a synergist when H2S is present in the fluid, or no synergist when H2S is present in the fluid, and a composition comprising specified following formula and optionally salts thereof.
    Type: Grant
    Filed: March 2, 2009
    Date of Patent: August 2, 2011
    Assignee: Nalco Company
    Inventors: Erick J. Acosta, Peter A. Webber, Keith A. Monk
  • Patent number: 7951347
    Abstract: A sour gas sweetening solution comprises an aqueous solution of a silicon-containing compound and an amine-containing compound. The silicon-containing compound is preferably maintained at a concentration less than or equal to 500 parts per million (“ppm”) more preferably less than or equal to 400 ppm, and most preferably between about 100 ppm and 300 ppm as SiO2. The silicon-containing compound can be MxSiyOz, wherein “M” is a metal and “x”, “y” and “z” are numbers greater than zero. The amine-containing compound can be selected from the group consisting of primary amines, secondary amines and tertiary amines.
    Type: Grant
    Filed: September 1, 2007
    Date of Patent: May 31, 2011
    Assignee: Novum Energy Technology, LLC
    Inventor: Marvin Johnson
  • Publication number: 20110070123
    Abstract: The invention involves a method of reducing corrosion inside power generation cycle equipment during plant shutdown and start-up periods by substantially reducing or totally eliminating internal contamination with corrosion causing acidic gases such as carbon dioxide and oxides of sulfur and nitrogen. Acidic gases are removed at their potential points of entry into the cycle either from ingressing ambient air or dissolved in make-up water in different kinds of filters.
    Type: Application
    Filed: March 27, 2009
    Publication date: March 24, 2011
    Inventor: Jan Stodola
  • Patent number: 7829750
    Abstract: The present invention relates to processes for fluidizing a population of catalyst particles that are depleted of catalyst fines. In one embodiment, the process includes providing a plurality of catalyst particles in the reactor, wherein the catalyst particles have a d2 value of greater than about 40 microns. The catalyst- particles are contacted with a fluidizing medium under conditions effective to cause the catalyst particles to behave in a fluidized manner and form a fluidized bed. The particles are contacted with one or more primary obstructing members while in the fluidized bed. By fluidizing the catalyst particles in this manner, the catalyst particles can be maintained at an axial gas Peclet number of from about 10 to about 20.
    Type: Grant
    Filed: December 2, 2005
    Date of Patent: November 9, 2010
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: James H. Beech, Jr., Nicolas Coute, Jeffrey S. Smith, Michael Peter Nicoletti
  • Patent number: 7704748
    Abstract: A novel Flame Temperature Analyzer (FTA) method and apparatus for measuring combustible gas concentration and oxygen content in a sample gas includes supplying a mixture of oxidant and fuel to a sensing flame and measuring the temperature of the flame as the sample is added to the combustion chamber.
    Type: Grant
    Filed: June 26, 2003
    Date of Patent: April 27, 2010
    Assignee: Control Instruments Corporation
    Inventors: Christopher G. Schaeffer, Matthew James Schaeffer, Pravin Patel
  • Patent number: 7585460
    Abstract: The invention relates to a method for inhibiting the biological acidification of water which is in contact with materials containing sulfur in reduced form or with elemental sulfur, susceptible to oxidation on the part of Thiobacilli, comprising putting said materials in contact with soluble inorganic salts at concentrations ranging from 0.4 normal to saturation.
    Type: Grant
    Filed: April 26, 2004
    Date of Patent: September 8, 2009
    Assignees: ENI S.p.A., Enitecnologie S.p.A.
    Inventors: Francesco Crescenzi, Antonella Crisari, Cesare Achille Piatti
  • Publication number: 20090169422
    Abstract: An industrial brine which exhibits improved corrosion inhibition which contains a carbohydrate having a molecular weight in the range of about 180 to 342 and where said carbohydrate is present in a concentration sufficient to reduce the corrosion rate of said brine by at least about 70%. The brine includes chloride salts such as magnesium chloride, calcium chloride, sodium chloride and mixtures thereof.
    Type: Application
    Filed: December 23, 2008
    Publication date: July 2, 2009
    Applicant: Sears Petroleum & Transport Corporation and Sears Ecological Applications Co., LLC
    Inventors: Robert A. Hartley, David H. Wood
  • Patent number: 7407623
    Abstract: Lecithin and 2-bromo-2-nitropropane-1,3 diol (BNPD) are used to inhibit corrosion in boiler steam condensate systems. Aqueous steam condensate corrosion inhibiting compositions of these components are also disclosed. BNPD is also used as a preservative in lecithin containing and in other GRAS additive containing compositions.
    Type: Grant
    Filed: October 5, 2004
    Date of Patent: August 5, 2008
    Assignee: GE Betz, Inc.
    Inventors: Wilson K. Whitekettle, Rosa Crovetto
  • Patent number: 7264770
    Abstract: A method for mitigating stress corrosion cracking of a component exposed to a high temperature water in a high temperature water system is provided. The method comprises the steps of lowering corrosion potential conditions to a desired low corrosion potential in the high temperature water environment; and introducing a first material comprising zinc into the high temperature water environment, such that the desired low corrosion potential facilitates transport of the first material into cracks in a structure communicative with the high temperature water environment.
    Type: Grant
    Filed: May 2, 2005
    Date of Patent: September 4, 2007
    Assignee: General Electric Company
    Inventors: Peter Louis Andresen, Young-Jin Kim, Sam Hettiarachchi, Thomas Pompilio Diaz, Thomas Martin Angeliu, Martin Mathew Morra
  • Patent number: RE41109
    Abstract: A composition of matter and the method of making that provides a low pH acidic composition that is useful for destroying microorganisms that are undesirable and useful for destroying or reducing melanomas on human skin. The composition and method include sulfuric acid combined with distilled water and ammonium sulfate under at least 15 psi pressure in a pressurized container, all of which is heated to approximately 800° F. or more for at least 3 hours. The final cooled mixture is stabilized with 10 percent of the original mixture. The resultant composition is useful for preserving food, such as fresh fish, and for skin treatment of melanoma and as bactericides, fungicides, or viricides.
    Type: Grant
    Filed: June 3, 2003
    Date of Patent: February 9, 2010
    Assignee: Phitex, L.L.L.P.
    Inventor: Barry W. Cummins