Patents Assigned to Petrolite Corporation
  • Method and apparatus for measuring total corrosion rate
    Patent number: 4454006
    Abstract: The corrosion of galvanically coupled metals can be measured and monitored by linear polarization techniques using a test galvanic electrode comprising two individual electrodes of different metals preferably connected end to end with a rigid metallic fastener. The galvanic electrode is treated as a single electrode and can be used as the test electrode in any two or three electrode configuration which includes at least the test electrode and a reference electrode. A three electrode configuration, including also an auxiliary electrode, is adapted for use in combination with the PAIR meter.
    Type: Grant
    Filed: July 23, 1982
    Date of Patent: June 12, 1984
    Assignee: Petrolite Corporation
    Inventors: Rudolf H. Hausler, Allen L. Savage, Jack B. Harrell, Jr.
  • Processes for inhibiting corrosion using compounds containing sulfur and amino groups
    Patent number: 4450138
    Abstract: This invention relates to the following:(1) An amino-containing composition characterized by polymercapto groups,(2) A polyamino-containing composition characterized by mercapto or polymercapto groups,(3) A composition characterized by the presence ofA. a mercapto or polymercapto groups, andB. a nitrogen-containing group characterized by at least one of the following:1. an amido or a polyamido group,2. a cyclic amidine or a polycyclic amidine group,3. an epihalohydrin-derived amino-containing group.This invention also relates to the use of the above compositions as corrosion inhibitors.
    Type: Grant
    Filed: October 29, 1982
    Date of Patent: May 22, 1984
    Assignee: Petrolite Corporation
    Inventors: Neil E. S. Thompson, Derek Redmore, Bernardus A. Oude Alink, Benjamin T. Outlaw
  • Processes for inhibiting corrosion using compounds containing sulfur and amino groups
    Patent number: 4450137
    Abstract: This invention relates to the following:(1) An amino-containing composition characterized by polymercapto groups,(2) A polyamino-containing composition characterized by mercapto or polymercapto groups,(3) A composition characterized by the presence ofA. a mercapto or polymercapto groups, andB. a nitrogen-containing group characterized by at least one of the following:1. an amido or a polyamido group,2. a cyclic amidine or a polycyclic amidine group,3. an epihalohydrin-derived amino-containing group.This invention also relates to the use of the above compositions as corrosion inhibitors.
    Type: Grant
    Filed: October 29, 1982
    Date of Patent: May 22, 1984
    Assignee: Petrolite Corporation
    Inventors: Neil E. S. Thompson, Derek Redmore, Bernardus A. Oude Alink, Benjamin T. Outlaw
  • Hydroxy and hydroperoxy tetrahydropyrimidines
    Patent number: 4447606
    Abstract: This invention relates to 5-hydroperoxy and/or 5-hydroxy derivatives of 2,2,4,4-dipentamethylene 5,6-tetramethylene 2,3,4,5-tetrahydropyrimidines; and to the preparation thereof. The compounds of this invention have utility as corrosion inhibitors.
    Type: Grant
    Filed: April 9, 1979
    Date of Patent: May 8, 1984
    Assignee: Petrolite Corporation
    Inventor: Bernardus A. Oude Alink
  • Demulsification of surfactant-petroleum-water flood emulsions
    Patent number: 4446054
    Abstract: This invention relates to the demulsification of surfactant petroleum water flood emulsions which comprises treating such emulsions with a demulsifier in conjunction with an amine, preferably a polyalkylenepolyamine.
    Type: Grant
    Filed: September 21, 1977
    Date of Patent: May 1, 1984
    Assignee: Petrolite Corporation
    Inventor: Donald U. Bessler
  • Preparation of mixture of nitrogen and sulfur-nitrogen heterocyclics and use in corrosion inhibiting
    Patent number: 4446056
    Abstract: A process of preparing sulfur-containing compositions which comprises reacting hexahydrotriazines, or the precursors thereof, with sulfur or sulfur-containing compounds. The products of the reaction are useful as corrosion inhibitors. Additionally, ketones or the reaction products of ketones and ammonia are reacted with sulfur or sulfur-containing compounds to yield corrosion inhibitors.
    Type: Grant
    Filed: December 10, 1979
    Date of Patent: May 1, 1984
    Assignee: Petrolite Corporation
    Inventor: Neil E. S. Thompson
  • Tetrahydrothiazole phosphonic acids or esters thereof
    Patent number: 4443609
    Abstract: This invention relates to tetrahydrothiazole phosphonic acids or phosphonates and to the preparation thereof by reacting dihydrothiazoles with phosphorous acid or esters thereof.
    Type: Grant
    Filed: May 19, 1980
    Date of Patent: April 17, 1984
    Assignee: Petrolite Corporation
    Inventors: Bernardus A. Oude Alink, Derek Redmore
  • Preparation of amines by the reduction of imines with phosphorous acid
    Patent number: 4442286
    Abstract: This invention relates to the preparation of amines by the reduction of imines with phosphorous acid, preferably under basic conditions.
    Type: Grant
    Filed: October 15, 1976
    Date of Patent: April 10, 1984
    Assignee: Petrolite Corporation
    Inventor: Derek Redmore
  • Oxidized alpha-olefins
    Patent number: 4426229
    Abstract: In contrast to hydrocarbon waxes, alpha-olefin waxes can be oxidized with little if any reduction in hardness. The oxidized product can be used as such or further reacted with polyisocyanates to yield isocyanated products. Salts of the isocyanated products (preferably lithium salts) are also prepared which are capable of forming colloidal solutions. These solutions preferably in hydrocarbons have superior film-forming properties when used in polishes, thus yielding when applied to a surface a finish of high gloss, durability, protection, etc. The isocyanated products and salts thereof when employed in carbon paper inks yield a carbon paper having superior properties.
    Type: Grant
    Filed: September 26, 1980
    Date of Patent: January 17, 1984
    Assignee: Petrolite Corporation
    Inventors: Malcolm E. Bolton, Joseph O. Bienvenu
  • One step modification and oxidation of waxes
    Patent number: 4426329
    Abstract: This invention relates to a one step process of oxidizing a natural or synthetic non-benzenoid hydrocarbon wax in the presence of a metal oxide or hydroxide, such as potassium, sodium or lithium oxide or hydroxide, and to the product formed by such oxidation.
    Type: Grant
    Filed: July 31, 1981
    Date of Patent: January 17, 1984
    Assignee: Petrolite Corporation
    Inventors: John H. Woods, Charles E. Laughlin, Toby R. Graves
  • Corrosion inhibition of halocarbon systems
    Patent number: 4422953
    Abstract: This invention relates to a method of inhibiting corrosion in halohydrocarbon systems such as haloethylene or other corrosive systems, which comprises treating such system with alkyl, alkenyl, or alkyl-X succinic acids or derivatives thereof, for example, salts thereof, where X is an oxygen, sulfur, amino, etc. containing group.
    Type: Grant
    Filed: April 21, 1982
    Date of Patent: December 27, 1983
    Assignee: Petrolite Corporation
    Inventors: Mark T. Grace, Michael I. Naiman, Eddie C. French
  • Quaternary aminomethyl phosphonates as scale inhibitors
    Patent number: 4420399
    Abstract: This invention relates to quaternary aminomethyl phosphonates and uses thereof for example as scale inhibitors, corrosion inhibitors, chelating agents, etc.
    Type: Grant
    Filed: May 28, 1982
    Date of Patent: December 13, 1983
    Assignee: Petrolite Corporation
    Inventor: Derek Redmore
  • Silicon-containing quaternary ammonium thiazines
    Patent number: 4418195
    Abstract: This invention relates to silicon-containing thiazines and to the process of preparing them. These are illustrated by the following formulae: ##STR1## where R and R' are substituted groups, for example hydrocarbon groups such as alkyl, aryl, cycloalkyl, etc.; A is alkylene, Z is a sulfur-containing group such as S, SO, SO.sub.2 and X is an anion.These compositions have a wide variety of uses including their use as corrosion inhibitors, microbiocides, etc.
    Type: Grant
    Filed: July 11, 1977
    Date of Patent: November 29, 1983
    Assignee: Petrolite Corporation
    Inventor: Patrick M. Quinlan
  • Antistatic agents for organic liquids
    Patent number: 4416668
    Abstract: This invention relates to imides of .alpha.-olefin-maleic copolymers and to blends of imides of .alpha.-olefin-maleic copolymer and .alpha.-olefin-sulfur dioxide copolymers; and to systems, such as hydrocarbon fuels, containing such compositions as antistatic agents.
    Type: Grant
    Filed: June 4, 1982
    Date of Patent: November 22, 1983
    Assignee: Petrolite Corporation
    Inventor: Neil E. S. Thompson
  • Method for the removal of asphaltenic deposits
    Patent number: 4414035
    Abstract: This invention relates to the removal of organic deposits containing asphaltenic compounds from surfaces with hydrocarbon-substituted arylsulfonic acids such as alkaryl sulfonic acids; a composition comprising a mixture of:(1) an aromatic hydrocarbon, and(2) a hydrocarbon-substituted-alkarylsulfonic acid such as an alkaryl sulfonic acid, for example an alkylbenzenesulfonic acid where the alkyl group has at least 5 carbon atoms, for example, from about 5 to 20 carbon atoms can be used for the removal of organic deposits containing asphaltenic compounds from surfaces.
    Type: Grant
    Filed: May 21, 1979
    Date of Patent: November 8, 1983
    Assignee: Petrolite Corporation
    Inventors: Michael E. Newberry, Kenneth M. Barker
  • Use of polyamines as demulsifiers
    Patent number: 4411814
    Abstract: This invention relates to the use of polyamines and/or polyamine salts, preferably those having 20 or less amino groups, as demulsifiers. This invention is particularly useful in breaking emulsions formed in surfactant flooding of oil bearing subterranean formations.
    Type: Grant
    Filed: February 10, 1981
    Date of Patent: October 25, 1983
    Assignee: Petrolite Corporation
    Inventor: Charles W. Burkhardt
  • Zinc oxide dispersions by decomposition of zinc acetate
    Patent number: 4410446
    Abstract: This invention relates to stable, fluid zinc-containing dispersions and the preparations thereof by the high temperature decomposition of zinc acetate to ZnO in a dispersant-containing fluid, said dispersant being stable at the temperature of decomposition.
    Type: Grant
    Filed: June 7, 1979
    Date of Patent: October 18, 1983
    Assignee: Petrolite Corporation
    Inventors: William J. Cheng, David B. Guthrie
  • N,N-Dimethylene phosphonic acids of alkylene diamines
    Patent number: 4409151
    Abstract: This invention relates to a process of preparing N,N'-disubstituted methylene phosphonic acids by reacting .alpha.,.omega.-alkylene diamines with essentially 2 equivalents of formaldehyde and phosphorus acid based on replaced nitrogen-bonded hydrogens.This invention also relates to compositions formed by the process and to the uses for these compositions such as for inhibiting scale, etc.
    Type: Grant
    Filed: December 28, 1981
    Date of Patent: October 11, 1983
    Assignee: Petrolite Corporation
    Inventors: Derek Redmore, William S. Paley
  • Hydrocarbon foams as well stimulants
    Patent number: 4404112
    Abstract: This invention relates to the use of silicone-induced hydrocarbon foams as well stimulants, for example as illustrated by their use in fracturing well formations, removal of paraffin in wells, removal of condensate hydrocarbons from blocked gas wells, etc.
    Type: Grant
    Filed: July 8, 1981
    Date of Patent: September 13, 1983
    Assignee: Petrolite Corporation
    Inventors: Gary A. Scherubel, Michael A. Thorne
  • Block polymers of alkanolamines
    Patent number: 4404362
    Abstract: This invention relates to block polymers of polyalkanolamine, for example a polymer where one block is polyethanolamine and the other block is polypropanolamine, etc.; and to uses thereof, for example as demulsifiers.
    Type: Grant
    Filed: December 14, 1981
    Date of Patent: September 13, 1983
    Assignee: Petrolite Corporation
    Inventor: Thomas J. Bellos