Patents Assigned to Petrolite Corporation
  • Use of phosphorylated oxyalkylated polyols in conjunction with sulfite and bisulfite oxygen scavengers
    Patent number: 4213934
    Abstract: This invention relates to the use of phosphorylated oxyalkylated polyols (POP) in conjunction with sulfite oxygen scavengers in inhibiting corrosion in oxygen-containing systems. The phosphorylated oxyalkylated polyols are effective in inhibiting the precipitation of the sulfite and bisulfite oxygen scavengers as scale.
    Type: Grant
    Filed: March 16, 1978
    Date of Patent: July 22, 1980
    Assignee: Petrolite Corporation
    Inventors: Thomas J. Bellos, James E. Davis
  • Inhibiting scale with amino-phosphonic-sulfonic acids
    Patent number: 4212734
    Abstract: This invention relates to compounds characterized by the presence of N-methyl, or substituted methyl, phosphonic acid and N-propylenesulfonic acid groups. These compounds contain at least one or more of each group and are bonded to the same or different amino groups. They are derived by reacting an amine with both propane sultone and with a carbonyl compound, such as formaldehyde, and phosphorous acid or its equivalent.They have a wide variety of uses, for example as scale and corrosion inhibitors, chelating agents, etc.
    Type: Grant
    Filed: December 16, 1977
    Date of Patent: July 15, 1980
    Assignee: Petrolite Corporation
    Inventors: Derek Redmore, Frederick T. Welge
  • Corrosion inhibition
    Patent number: 4212842
    Abstract: This invention relates to a process of inhibiting corrosion which comprises adding an aqueous soluble form of a normally insoluble corrosion inhibitor to an aqueous system which converts the soluble corrosion inhibitor to an insoluble form which coats the metal with a corrosion inhibiting film.For example, a water insoluble heterocyclic amine used as a water soluble salt is dissolved in an aqueous system having a pH in excess of about 6 where the heterocyclic amine itself, i.e., in non-salt form, comes out of solution as a stable, fine dispersion which coats the metal with a uniform and tenacious corrosion inhibiting film.
    Type: Grant
    Filed: March 24, 1975
    Date of Patent: July 15, 1980
    Assignee: Petrolite Corporation
    Inventor: Francis J. Hartke
  • Quaternary polyvinyl heterocyclic compositions and use as corrosion inhibitors
    Patent number: 4212764
    Abstract: Quaternary polyvinyl heterocyclic compositions, as illustrated by polyvinyl pyridine and copolymers thereof, and their use as corrosion inhibitors which are particularly effective in acid systems.
    Type: Grant
    Filed: July 3, 1972
    Date of Patent: July 15, 1980
    Assignee: Petrolite Corporation
    Inventor: Patrick M. Quinlan
  • .DELTA.-2 Tetrahydropyrimidines as corrosion inhibitors
    Patent number: 4212843
    Abstract: A process of converting 2,3,4,5-tetrahydropyrimidines (.DELTA.-1) having at least one hydrogen in the 2-position to 3,4,5,6-tetrahydropyrimidines (.DELTA.-2) which comprises hydrogenating and dehydrogenating said .DELTA.-1 tetrahydropyrimidines. Such hydrogenating and dehydrogenating may be done in either two sequential steps or in one step.Said .DELTA.-1 tetrahydropyrimidines can also be converted to .DELTA.-2 tetrahydropyrimidines by heating in the essential absence of a solvent, and preferably under basic conditions.In addition, corresponding hexahydropyrimidimidines can be converted to corresponding .DELTA.-2 tetrahydropyrimidines by dehydrogenation.This invention also relates to the use of .DELTA.-2 tetrahydropyrimidines, particularly as corrosion inhibitors.
    Type: Grant
    Filed: September 15, 1978
    Date of Patent: July 15, 1980
    Assignee: Petrolite Corporation
    Inventor: Bernardus A. Oude Alink
  • Plural parallel stage desalting and dehydration
    Patent number: 4209374
    Abstract: A desalter/dehydrator having a plurality of electrified coalescing stages in a single vessel, wherein the stages are isolated hydraulically to allow parallel or serial stage operations. In one embodiment, several electrical stages, each separately energized, are operated in parallel to proportionately increase vessel throughput capacity. In another embodiment, series operation is employed, wherein each successive stage receives the product from the preceding stage as feed, with fresh water being added. Placement of electrodes, distributors, collectors, etc. are determined by the type of operation to be performed in the vessel.
    Type: Grant
    Filed: November 14, 1978
    Date of Patent: June 24, 1980
    Assignee: Petrolite Corporation
    Inventor: Robert B. Martin
  • Microbiocidal quaternaries of halogen derivatives of alkynoxymethyl amines
    Patent number: 4206233
    Abstract: This invention relates to quaternaries of halogen derivatives of alkynoxymethyl amines and uses thereof. These may be summarized by the following formulae: ##STR1## where R and R' are substituted groups such as alkyl, aryl, etc.; R" is an alkylidene group; and X is halogen and A is an anion; and ##STR2## where R, R' and R" having the same meaning as in (1) and Z is a bridging group, preferably hydrocarbon such as alkylene, alkinylene, alkenylene, arylene, etc.
    Type: Grant
    Filed: November 3, 1978
    Date of Patent: June 3, 1980
    Assignee: Petrolite Corporation
    Inventor: Patrick M. Quinlan
  • Thioether containing quaternary ammonium derivatives of 1,4-thiazines as microbiocides
    Patent number: 4200633
    Abstract: This invention relates to N-alkyl thioethers of quaternary ammonium derivatives of 1,4-thiazines; to the preparation thereof; and to the uses thereof for example as corrosion inhibitors, microbiocides, etc.
    Type: Grant
    Filed: December 4, 1978
    Date of Patent: April 29, 1980
    Assignee: Petrolite Corporation
    Inventor: Patrick M. Quinlan
  • Sulfone containing quaternary ammonium derivatives of 1,4-thiazines as microbiocides
    Patent number: 4200634
    Abstract: This invention relates to N-alkyl sulfone containing quaternary ammonium derivatives of 1,4-thiazines; to the preparation thereof; and to the uses thereof, for example as corrosion inhibitors, microbiocides, etc.
    Type: Grant
    Filed: December 4, 1978
    Date of Patent: April 29, 1980
    Assignee: Petrolite Corporation
    Inventor: Patrick M. Quinlan
  • Cold end corrosion rate probe
    Patent number: 4196057
    Abstract: A cold end corrosion rate measuring probe consisting of a corrosion rate meter probe modified by the addition of a cooling jacket and a temperature measuring device such as a thermocouple. The probe is adapted to be flush mounted in an exhaust line or flue. A coolant, e.g. water, is circulated through the jacket to bring monitored gas to its dew point, at which point, a corrosion rate measurement can be made. The dew point may also be indicated by increased conductivity across two adjacent electrodes of the probe, e.g., the reference and test electrodes. Measurement of corrosion rate and accompanying dew point can be correlated with sulfur trioxide concentration in flue or exhaust gases and hence enables predictability of occurrence and location of "cold end" corrosion, which also indicates inhibitor effectiveness.
    Type: Grant
    Filed: August 31, 1978
    Date of Patent: April 1, 1980
    Assignee: Petrolite Corporation
    Inventors: Walter R. May, Michael J. Zetlmeisl, David F. Laurence
  • Use of electrofilter as an extraction column
    Patent number: 4193856
    Abstract: The use of an electrofilter as an extraction column and/or as an extraction column-filter combination is disclosed. Solvent-extractible solids positioned in an electrically activated electrofilter are subjected to solvent extraction. The solids positioned in the electrically activated electrofilter may be previously unextracted, partially extracted or completely extracted, or combinations thereof. When the process is completed, the solid material can be removed from the electrofilter by electrically deactivating the electrofilter and removing the solids therefrom by any suitable means, such as by means of a solvent wash. The process may be efficiently utilized for oilseed extraction.
    Type: Grant
    Filed: June 24, 1977
    Date of Patent: March 18, 1980
    Assignee: Petrolite Corporation
    Inventor: Leslie R. Watkins
  • ZnO dispersions by decomposition of ZnCO.sub.3
    Patent number: 4193769
    Abstract: This invention relates to stable, fluid zinc-containing dispersions and the preparations thereof by the high temperature decomposition of ZnCO.sub.3 to ZnO in a dispersant-containing fluid.
    Type: Grant
    Filed: October 23, 1978
    Date of Patent: March 18, 1980
    Assignee: Petrolite Corporation
    Inventors: William J. Cheng, David B. Guthrie
  • Dithioles
    Patent number: 4190727
    Abstract: The process of reacting dithiolium compounds with an hydroxy compound such as water, alcohols, etc., under basic conditons so as to substitute the hydroxy constituent into the 3 or 5 position of the thiolium ring thus replacing the positive ionic valency with a covalent bond; and to the dithiole compositions formed and uses therefor, for example as corrosion inhibitors, etc. The process can be reversed to reform the original dithiolium compounds by reacting the dithiole compound under acidic conditions.
    Type: Grant
    Filed: May 13, 1976
    Date of Patent: February 26, 1980
    Assignee: Petrolite Corporation
    Inventor: Bernardus A. Oude Alink
  • Thioether containing quartenary ammonium derivatives of 1,4-thiazines
    Patent number: 4188359
    Abstract: This invention relates to N-alkyl thioethers of quaternary ammonium derivatives of 1,4-thiazines; to the preparation thereof; and to the uses thereof for example as corrosion inhibitors, microbiocides, etc.
    Type: Grant
    Filed: December 4, 1978
    Date of Patent: February 12, 1980
    Assignee: Petrolite Corporation
    Inventor: Patrick M. Quinlan
  • Process for desalting petroleum oils
    Patent number: 4188277
    Abstract: A desalter/dehydrator having a plurality of electrified coalescing stages in a single vessel, wherein the stages are isolated hydraulically to allow parallel or serial stage operations. In one embodiment, several electrical stages, each separately energized, are operated in parallel to proportionately increase vessel throughput capacity. In another embodiment, series operation is employed, wherein each successive stage receives the product from the preceding stage as feed, with fresh water being added. Placement of electrodes, distributors, collectors, etc. are determined by the type of operation to be performed in the vessel.
    Type: Grant
    Filed: November 14, 1978
    Date of Patent: February 12, 1980
    Assignee: Petrolite Corporation
    Inventor: Robert B. Martin
  • Process of inhibiting corrosion with quaternaries of halogen derivatives of alkynoxymethyl amines
    Patent number: 4187277
    Abstract: This invention relates to quaternaries of halogen derivatives of alkoxynoxymethyl amines and uses thereof. These may be summarized by the following formulae: ##STR1## where R and R' are substituted groups such as alkyl, aryl, etc.; R" is an alkylidene group; and X is halogen and A is an anion; and ##STR2## where R, R' and R" having the same meaning as in (1) and Z is a bridging group, preferably hydrocarbon such as alkylidene, alkinylene, alkenylene, arylene, etc.
    Type: Grant
    Filed: November 3, 1978
    Date of Patent: February 5, 1980
    Assignee: Petrolite Corporation
    Inventor: Patrick M. Quinlan
  • Preparation of pyridyl-4-phosphonates
    Patent number: 4187378
    Abstract: This invention relates to the preparation of pyridyl-4-phosphonates by reacting phosphite ester salts with pyridines which are N-substituted with sterically hindering or "bulky" groups such as "bulky" phenyl groups, for example trityl, .phi..sub.3 C-.
    Type: Grant
    Filed: December 15, 1975
    Date of Patent: February 5, 1980
    Assignee: Petrolite Corporation
    Inventor: Derek Redmore
  • Hydroxypropylene-amino-phosphonic-sulfonic acids
    Patent number: 4187245
    Abstract: This invention relates to compounds characterized by the presence of N-methyl, or substituted methyl, phosphonic acid and N-hydroxy-propylenesulfonic acid groups. These compounds contain at least one or more of each group and are bonded to the same or different amino groups. They are derived by reacting an amine with both (1) an epihalohydrin-bisulfite addition product and (2) with a carbonyl compound, such as formaldehyde, and phosphorous acid or its equivalent.They have a wide variety of uses, for example as scale and corrosion inhibitors, iron oxide removers, chelating agents, etc.
    Type: Grant
    Filed: December 4, 1978
    Date of Patent: February 5, 1980
    Assignee: Petrolite Corporation
    Inventors: Derek Redmore, Frederick T. Welge
  • Polymer compositions containing as antioxidants substituted hexahydropyrimidines
    Patent number: 4185005
    Abstract: This invention relates to diamines prepared by condensing cyclohexanone, or derivatives thereof, with ammonia to yield tetrahydropyrimidines, which can be reduced to hexahydropyrimidines, whose pyrimidine ring can be broken to yield diamines having one primary amino group, which primary group can be reacted with a carbonyl to yield Schiff base imines, which Schiff base imines can be reduced to N-subsituted amino groups. The two amino groups of the reduced Schiff base can be bridged by reaction with an aldehyde to form N,N'-disubstituted hexahydropyrimidines.This invention also relates to the use of these products as antioxidants.
    Type: Grant
    Filed: June 16, 1978
    Date of Patent: January 22, 1980
    Assignee: Petrolite Corporation
    Inventor: Neil E. S. Thompson
  • Plural stage desalter/dehydrator in a single vessel
    Patent number: 4182672
    Abstract: A desalter/dehydrator having a plurality of electrified coalescing stages in a single vessel, wherein the stages are isolated hydraulically to allow parallel or serial stage operations. In one embodiment, several electrical stages, each separately energized, are operated in parallel to proportionately increase vessel throughput capacity. In another embodiment, series operation is employed, wherein each successive stage receives the product from the preceding stage as feed, with fresh water being added. Placement of electrodes, distributors, collectors, etc. are determined by the type of operation to be performed in the vessel.
    Type: Grant
    Filed: January 6, 1978
    Date of Patent: January 8, 1980
    Assignee: Petrolite Corporation
    Inventor: Robert B. Martin