With Nonhydrocarbon Additive Patents (Class 585/2)
  • Patent number: 6316393
    Abstract: Metal powder compositions for powder metallurgy (P/M) applications contain an oxidized high-density polyethylene as a lubricant. The compositions are suitable for either cold or warm compaction. When compacted, the compositions yield parts having relatively high density, high green strength and good surface finish.
    Type: Grant
    Filed: October 2, 2000
    Date of Patent: November 13, 2001
    Assignee: National Research Council of Canada
    Inventors: Yannig Thomas, Linda Tremblay, Sylvain St-Laurent
  • Patent number: 6277269
    Abstract: A bitumen is rendered pipelineable by partially hydroconverting the bitumen and then adding sufficient diluent to the partially hydroconverted bitumen to provide a mixture having an API gravity at 15° C. of at least 19° and a viscosity at 40° C. in the range of about 35 to about 60 cP.
    Type: Grant
    Filed: December 21, 1999
    Date of Patent: August 21, 2001
    Assignee: ExxonMobil Research and Engineering Company
    Inventors: Ronald Damian Myers, John Brenton MacLeod, Mainak Ghosh, Tapan Chakrabarty
  • Publication number: 20010010293
    Abstract: A traction drive fluid comprising a naphthenic compound represented by the formula 1
    Type: Application
    Filed: December 15, 2000
    Publication date: August 2, 2001
    Applicant: Nippon Mitsubishi Oil Corporation
    Inventors: Noboru Ishida, Shinichi Shirahama, Tetsuo Okawa, Shigeki Matsui
  • Patent number: 6232518
    Abstract: A method for separating benzene from a hydrocarbon mixture containing benzene and at least one other organic material is carried out by treating the hydrocarbon mixture with at least one cyclodextrin to form complexes of the cyclodextrin with at least a portion of the benzene present in the hydrocarbon mixture. The cyclodextrin-benzene complexes then are separated from the hydrocarbon mixture.
    Type: Grant
    Filed: July 3, 1997
    Date of Patent: May 15, 2001
    Assignee: Exxon Mobil Chemical Patents Inc.
    Inventor: Di-Yi (John) Ou
  • Patent number: 6227285
    Abstract: A heat storage medium such as paraffin for a latent heat accumulator (cold accumulator), which solidifies while forming crystal structures. In order to achieve improved responsiveness on heat input, the crystal structures are modified by a structure additive preferably in terms of hollow structures, such as e.g. hollow cones.
    Type: Grant
    Filed: June 20, 1997
    Date of Patent: May 8, 2001
    Assignee: Schümann Sasol GmbH & Co. KG
    Inventors: Günter Hildebrand, Michael Matthäi, Norbert Matzat, Rolf Laudi, Klaus Fieback, Wolfgang Ahrens, Thomas Krämer
  • Patent number: 6126862
    Abstract: The present invention is directed to a process for the production of agglomerates of a blend of a sterically hindered phenol antioxidant and an acid neutralizer such that the agglomerates have a balanced hardness to resist abrasion during conveyance yet being readily dispersed in a host plastic. Such agglomerates are achieved through the use of a processing aid consisting of an alcohol of the formula ROH wherein R is an alkyl group of 1 to 8 carbon atoms, either alone or having up to 80% by volume of a cosolvent selected from the group consisting of methylene chloride, chloroform, toluene, acetone, methylethylketone, xylene, cyclohexane, styrene, methylcyclohexane, and hexane. The cosolvent processing aid has at least 1 gram of antioxidant dissolved therein per 100 mL of solvent. The processing aids are used to form a paste of a mixture of antioxidant and an acid neutralizer. The resulting paste is then subjected to agglomeration and the resulting agglomerates are thereafter dried.
    Type: Grant
    Filed: December 2, 1998
    Date of Patent: October 3, 2000
    Assignee: Ablemarle Corporation
    Inventor: John Semen
  • Patent number: 6004361
    Abstract: A low emission diesel fuel suitable for use in underground diesel-engined mining equipment comprises a straight run distillate fuel having an end point not greater than 300.degree. C. (about 660.degree. F.), a cetane number in the range of 55 to 60 a specific gravity not greater than 0.83 a sulfur content not greater than 0.1 wt percent and an aromatics content of 18 to 30 wt. percent. The T.sub.90 of the fuels is typically in the range of 255.degree. to 270.degree. C. (about 490.degree. F. to 525.degree. F.), with an initial boiling points typically in the range of 170.degree. to 190.degree. C. (about 340.degree. to 374.degree. F.). Ten percent points (T.sub.10) are typically in the range from about 200.degree. to 220.degree. C. (about 390.degree. to 430.degree. F.). The API gravity of the fuel is at least 38 and is typically in the range of 38 to 42 and the specific gravity is typically in the range of 0.82 to 0.83.
    Type: Grant
    Filed: February 26, 1999
    Date of Patent: December 21, 1999
    Assignee: Mobil Oil Corporation
    Inventors: Edward G. Barry, John N. Bennett, Dale B. Heck, Peter Heinze
  • Patent number: 5990327
    Abstract: Use of aminotriarylmethanes of the formula ##STR1## where the ring A may be benzofused, andR.sup.1 and R.sup.2 are each substituted or unsubstituted C.sub.1 -C.sub.13 -alkyl or substituted or unsubstituted phenyl, or R.sup.1 and R.sup.2 are together with the nitrogen atom joining them together a heterocyclic radical, or else R.sup.1 is hydrogen,R.sup.3 and R.sup.4 are substituted or unsubstituted C.sub.1 -C.sub.20 -alkyl or else R.sup.3 is hydrogen, andX.sup.1 and X.sup.2 are each substituted or unsubstituted C.sub.1 -C.sub.13 -alkyl or a radical of the formula NR.sup.1 R.sup.2, or else one of X.sup.1 and X.sup.2 is hydrogen,for marking hydrocarbons, hydrocarbons comprising the abovementioned aminotriarylmethanes, a method for detecting the aminotriarylmethanes in hydrocarbons, and novel aminotriarylmethanes.
    Type: Grant
    Filed: November 30, 1995
    Date of Patent: November 23, 1999
    Assignee: BASF Aktiengesellschaft
    Inventors: Ulrike Schloesser, Karin Heidrun Beck
  • Patent number: 5985179
    Abstract: The corrosion of metals in contact with an aqueous alkanolamine solution in an acid gas removal unit is inhibited by adding a corrosion inhibiting amount of an alkanemonothiol or alkanedithiol compound to the aqueous alkanolamine solution. The alkanemonothiol and alkanedithiol compounds are useful for inhibiting the corrosion of metals in both the acid gas rich and lean portions of the acid gas removal unit.
    Type: Grant
    Filed: August 27, 1998
    Date of Patent: November 16, 1999
    Assignee: BetzDearborn, Inc.
    Inventors: Ljiljana V. Minevski, Ann L. Lambousy
  • Patent number: 5986153
    Abstract: A process for substantially stabilizing the color of a fluid which comprises an olefin is disclosed. The process comprises contacting the fluid with a composition, which comprises aluminum, zirconium and a borate, under a condition effective to stabilize the color of the fluid.
    Type: Grant
    Filed: September 30, 1997
    Date of Patent: November 16, 1999
    Assignee: Phillips Petroleum Company
    Inventors: Lyle R. Kallenbach, Jeffrey W. Freeman
  • Patent number: 5976201
    Abstract: A low emission diesel fuel suitable for use in underground diesel-engined mining equipment comprises a straight run distillate fuel having an end point not greater than 300.degree. C. (about 660.degree. F.), a cetane number in the range of 55 to 60 a specific gravity not greater than 0.83 a sulfur content not greater than 0.1 wt percent and an aromatics content of 18 to 30 wt. percent. The T.sub.90 of the fuels is typically in the range of 255.degree. to 270.degree. C. (about 490.degree. F. to 525.degree. F.), with an initial boiling points typically in the range of 170.degree. to 190.degree. C. (about 340.degree. to 374.degree. F). Ten percent points (T.sub.10) are typically in the range from about 200.degree. to 220.degree. C. (about 390.degree. to 430.degree. F.). The API gravity of the fuel is at least 38 and is typically in the range of 38 to 42 and the specific gravity is typically in the range of 0.82 to 0.83.
    Type: Grant
    Filed: October 28, 1996
    Date of Patent: November 2, 1999
    Assignee: Mobil Oil Corporation
    Inventors: Edward G. Barry, John N. Bennett, Dale B. Heck, Peter Heinze
  • Patent number: 5925233
    Abstract: The present invention relates to the use of secondary alkanesulphonic acids as asphaltene dispersing agent in crude oils and products derived therefrom, wherein a chain length of 8 to 22 C atoms is present. The secondary alkanesulfonic acids are employed in an amount of from 1 to 10,000 ppm by volume. The alkanesulfonic acid is preferably formulated as a solution or microemulsion, and can further contain optional alkyl-formaldehyde resin, oxyalkylated amines, or wax-dispersing agents. The alkanesulfonic acids provide reduced precipitate amounts, slow the rate of precipitate formation, form a more finely divided precipitate and reduce the tendency of the precipitate to be deposited on surfaces.
    Type: Grant
    Filed: October 14, 1997
    Date of Patent: July 20, 1999
    Assignee: Clariant GmbH
    Inventors: Dennis Miller, Axel Vollmer, Michael Feustel
  • Patent number: 5886241
    Abstract: The polymerization of an ethylenically unsaturated monomer such as isoprene, butadiene and acrylonitrile is inhibited during storage or handling thereof by the addition of a dihydroxycinnamic acid or derivative thereof.
    Type: Grant
    Filed: April 21, 1998
    Date of Patent: March 23, 1999
    Assignee: BetzDearborn Inc.
    Inventor: Graciela B. Arhancet
  • Patent number: 5869717
    Abstract: Applicants have developed a process for inhibiting the polymerization of vinyl aromatic compound during the distillation of the vinyl aromatic compounds. The process involves adding to the vinyl aromatic compound, e.g., styrene, a nitroso compound such as N-nitroso-N, N'-di-3-pentyl-p-phenylenediamine.
    Type: Grant
    Filed: September 17, 1997
    Date of Patent: February 9, 1999
    Assignee: UOP LLC
    Inventors: Robert R. Frame, Paul R. Kurek
  • Patent number: 5843373
    Abstract: The corrosion of metals in contact with aqueous alkanolamine solution in acid gas removal units is inhibited by maintaining in the alkanolamine solution a corrosion inhibiting amount of a thiodialkanol. The thiodialkanol is useful for inhibiting the corrosion of metals in both the acid gas rich and lean portions of the acid gas removal unit.
    Type: Grant
    Filed: August 22, 1997
    Date of Patent: December 1, 1998
    Assignee: BetzDearborn Inc.
    Inventors: Ljiljana V. Minevski, Sydia B. Anderson, Michael A. Cady
  • Patent number: 5843299
    Abstract: The corrosion of metals in contact with an aqueous alkanolamine solution in an acid gas removal unit is inhibited by adding a corrosion inhibiting amount of an alkanemonothiol or alkanedithiol compound to the aqueous alkanolamine solution. The alkanemonothiol and alkanedithiol compounds are useful for inhibiting the corrosion of metals in both the acid gas rich and lean portions of the acid gas removal unit.
    Type: Grant
    Filed: August 22, 1997
    Date of Patent: December 1, 1998
    Assignee: BetzDearborn Inc.
    Inventors: Ljiljana V. Minevski, Ann L. Lambousy
  • Patent number: 5841010
    Abstract: This invention is directed toward a method for inhibiting the formation (nucleation, growth and agglomeration) of clathrate hydrates. The method comprises adding into a mixture comprising hydrate forming substituents and water, an effective amount of a hydrate inhibitor selected from the group consisting of anionic, cationic, non-ionic and zwitterionic hydrate inhibitors. The hydrate inhibitor has a polar head group and a nonpolar tail group not exceeding 12 carbon atoms in the longest carbon chain.
    Type: Grant
    Filed: June 2, 1995
    Date of Patent: November 24, 1998
    Assignee: Exxon Production Research Company
    Inventors: Manese Rabeony, Dennis George Peiffer, Christine Ann Costello, Pamela Jean Wright, Karla Schall Colle, Larry Dalton Talley
  • Patent number: 5817897
    Abstract: A wax-like substance mainly consisting of a saturated chain hydrocarbon, in which a weight ratio (C/H) of carbon and hydrogen is 5.839-6.018, a total weight % of the carbon and the hydrogen is 98.5%-100%, a number-average molecular weight (Mn) is 3.0.times.10.sup.3 -1.0.times.10.sup.4, a weight-average molecular weight (Mw) is 1.0.times.10.sup.4 -5.0.times.10.sup.4 and Mw/Mn is 1.0-5.0. In the case of using it for carving and casting, for example, wax-like substance can be repeatedly used, and has the excellent workability. Moreover, the wax-like substance provides easy dewaxing from a mold material. In other words, it provides convenient use. In addition, after a master model is made by processing the wax-like substance and covered with a mold material, it is dewaxed. Molten metal is poured into the mold material, and a shaped article is produced by cooling and solidifying the mold material where the molten metal has been poured.
    Type: Grant
    Filed: September 7, 1995
    Date of Patent: October 6, 1998
    Inventor: Nabhikhi Itou
  • Patent number: 5800729
    Abstract: The invention discloses novel azeotrope-like mixtures of fluorinated compounds which are useful for heating and cooling as heat transfer agents and/or refrigerants. The azeotrope-like mixture comprises: (a) pentafluoropropane; and (b) a hydrofluorocarbon of the formula: C.sub.x F.sub.y H.sub.z, wherein x is 3, 4, 5, or 6 and y and z are each independently 1 or a positive whole number such that the result of y/(y+z) is greater than 0.67.
    Type: Grant
    Filed: July 25, 1996
    Date of Patent: September 1, 1998
    Assignee: Electric Power Research
    Inventors: David P. Wilson, Rajiv R. Singh, Rajat S. Basu, Ellen L. Swan, David Nalewajek
  • Patent number: 5756870
    Abstract: The polymerization of an ethylenically unsaturated monomer such as isoprene and butadiene is inhibited during storage or handling thereof by the addition of a dihydroxycinnamic acid or derivative thereof.
    Type: Grant
    Filed: May 3, 1996
    Date of Patent: May 26, 1998
    Assignee: BetzDearborn Inc.
    Inventor: Graciela B. Arhancet
  • Patent number: 5744672
    Abstract: A method for inhibiting the polymerization of vinyl aromatics such as styrene with a mixture of 3,5-di-tert-butyl-4-hydroxy-N,N-dimethylbenzyl amine and carboxylic acids or anhydrides thereof, in the presence of air or oxygen. The weight ratio of said 3,5-Di-tert-butylhydroxy-N,N-dimethylbenzyl amine, carboxylic acid (or carboxylic acid anhydride) and the air is 1:1 to 0.05:0.05 to 15, respectively.
    Type: Grant
    Filed: January 23, 1996
    Date of Patent: April 28, 1998
    Inventors: Vladimir Anatolievich Kourbatov, Nataljya Pavlovna Boreyko, Valerii Pavlovich Zouev, Alexandr Grigorievich Liakumovich
  • Patent number: 5672294
    Abstract: Azeotrope-like compositions of 1,1,1,3,3-pentafluoropropane and at least one hydrocarbon selected from the group n-pentane, iso-pentane, cyclopentane, n-hexane and iso-hexane are provided. The compositions of the invention are useful in the preparation of polyurethane and polyisocyanurate foams.
    Type: Grant
    Filed: April 10, 1996
    Date of Patent: September 30, 1997
    Assignee: AlliedSignal Inc.
    Inventors: Earl August Eugene Lund, deceased, Robert Christian Parker, Ian Robert Shankland
  • Patent number: 5659095
    Abstract: A polymerization inhibitor composition for inhibiting the polymerization of aromatic vinyl monomers at elevated temperatures comprising:(a) a benzofuroxan derivative of the formula ##STR1## wherein R is C.sub.1 -C.sub.4 alkyl or alkoxy; R.sup.1 is a nitro group; and m and n are each independently 0, 1, or 2; and(b) a solvent selected from the group consisting of toluene, xylene, ethylbenzene, vinyltoluene, divinylbenzene, alpha-methylstyrene, and a C.sub.12 -C.sub.18 hydrocarbon,and methods for inhibiting the polymerization of aromatic vinyl monomers at elevated temperatures using this composition.
    Type: Grant
    Filed: March 13, 1996
    Date of Patent: August 19, 1997
    Assignee: Uniroyal Chemical Company, Inc.
    Inventors: Howard Stephen Friedman, Gerald John Abruscato, John Matthew DeMassa, Anthony Vincent Gentile, Anthony Vincent Grossi
  • Patent number: 5648572
    Abstract: Compositions and methods for inhibiting vinyl aromatic monomer polymerization during processing are disclosed. The compositions comprise a dinitrosalicylic acid derivative and a hydroxylamine compound. The methods comprise adding the composition to the monomer during processing. The preferred composition comprises 3,5-dinitrosalicylic acid or 3,5-dinitrosalicylic methyl ester and bis-(hydroxypropyl)hydroxylamine.
    Type: Grant
    Filed: May 31, 1995
    Date of Patent: July 15, 1997
    Assignee: BetzDearborn Inc.
    Inventors: Graciela B. Arhancet, Inge K. Henrici, J. Frederick Martin
  • Patent number: 5488192
    Abstract: In the production of styrene, spontaneous polymerization of styrene monomer causes reduced efficiency and as such it is desirable to prevent the formation of polymer by the addition of inhibitors. A known inhibiting composition is 3,5-di-tert-butyl-4-hydroxy-N,N-dimethylbenzyl amine and carboxylic acid, or an anhydride of said carboxylic acid which is added to a styrene-containing mixture. However large quantities are required and often portions of the inhibiting composition are not utilized resulting in nonproductive loss. The efficiency of the specific inhibitor can be improved by supplying air simultaneously with the inhibiting composition in a weight ratio of 3,5-di-tert-butyl-4-hydroxy-N,N-dimethylbenzyl amine to carboxylic acid to air, said ratio being 1:1-0.05:0.05-15.
    Type: Grant
    Filed: May 5, 1994
    Date of Patent: January 30, 1996
    Assignee: Kourbatov
    Inventors: Vladimir A. Kourbatov, Nataljya P. Boreyko, Valerii P. Zouev, Alexandr G. Liakumovich
  • Patent number: 5475171
    Abstract: This invention relates to a two-stroke engine oil which comprises polybutene base oils which are either very low in or are substantially free of n-butenes in the polymer backbone. The absence of n-butenes in the polybutenes significantly reduces smoke emission in exhaust gases generated by the use of the engine oil. Polybutenes such as ULTRAVIS.RTM. which are substantially free of chlorine and have a high degree of terminal unsaturation are particularly preferred.
    Type: Grant
    Filed: August 4, 1994
    Date of Patent: December 12, 1995
    Assignee: BP Chemicals Limited
    Inventors: John McMahon, John D. Fotheringham
  • Patent number: 5464851
    Abstract: A composition which contains a 2-halo-2-halomethyl glutaronitrile and a 4,5-polymethylene-4-isothiazolin-3-one. The compositions exhibit anti-microbial activity and certain combinations of isothiazolinones together with the glutaronitrile are surprisingly effective against both bacteria and fungi.
    Type: Grant
    Filed: July 29, 1994
    Date of Patent: November 7, 1995
    Assignee: Zeneca Limited
    Inventor: Fraser F. Morpeth
  • Patent number: 5437722
    Abstract: The water resistance of gypsum compositions, such as those used in gypsum wallboard, is improved by incorporating in the compositions an aqueous emulsion containing a paraffinic hydrocarbon having a melting point of 40.degree. to 80.degree. C., montan wax and polyvinyl alcohol.
    Type: Grant
    Filed: March 1, 1994
    Date of Patent: August 1, 1995
    Assignee: Bakor Inc.
    Inventor: Lionel Borenstein
  • Patent number: 5414168
    Abstract: Purified hydrogen is recovered from the effluent of a catalytic dehydrogenation zone using an integrated cold absorption process. The effluent, which contains olefinic hydrocarbons and hydrogen is compressed, cooled and contacted with a liquid absorbent. The purified hydrogen can be recycled to the dehydrogenation zone and the olefinic hydrocarbons are recovered as product. The present invention will recover higher purity hydrogen and liquefiable hydrocarbons more economically than prior art processes.
    Type: Grant
    Filed: May 6, 1993
    Date of Patent: May 9, 1995
    Assignee: UOP
    Inventor: Norman H. Scott
  • Patent number: 5396005
    Abstract: Disclosed are compositions and methods for inhibiting polymerization of ethylenically unsaturated monomers. The compositions comprise a methoxyphenol compound selected from the group consisting eugenol and 2-tert-butyl-4-hydroxyanisole and a phenylenediamine compound. The methods comprise adding from about 1 to about 10,000 parts per million to the ethylenically unsaturated monomer during processing.
    Type: Grant
    Filed: January 19, 1994
    Date of Patent: March 7, 1995
    Assignee: Betz Laboratories, Inc.
    Inventor: Graciela B. Arhancet
  • Patent number: 5345030
    Abstract: 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: Grant
    Filed: March 11, 1993
    Date of Patent: September 6, 1994
    Assignee: Exxon Chemical Patents Inc.
    Inventors: Hsiang-ning Sun, John J. Cikut, Roque V. Martir, Jos P. Wristers
  • Patent number: 5321172
    Abstract: Solvent-free lubricant compositions having improved lubricity properties comprising a basestock having a kinematic viscosity of about 1.5 to 3.0 cSt at 100.degree. C., about 3 to 15 wt % of bright stock having a kinematic viscosity about 20 to 40 cSt at 100.degree. C., about 3 to 15 wt % of a polyisobutylene having a number average molecular weight of about 400 to 1050 and about 3 to 15 wt % of a polyisobutylene having a number average molecular weight of about 1150 to 1650. Minor amounts of the lubricant composition may be incorporated into a distillate fuel to provide a lubricant oil-fuel composition for two-cycle engines.
    Type: Grant
    Filed: February 26, 1993
    Date of Patent: June 14, 1994
    Assignee: Exxon Research and Engineering Company
    Inventors: A. Gordon Alexander, Alan G. Blahey
  • Patent number: 5302681
    Abstract: The premature free-radical polymerization of a non-linear, readily polymerizable organic monomer under conditions where the monomer would otherwise polymerize is inhibited by incorporating within the non-linear, readily polymerizable monomer a polymerization inhibiting amount of a fullerene or a derivative thereof.
    Type: Grant
    Filed: December 10, 1992
    Date of Patent: April 12, 1994
    Assignee: Nalco Chemical Company
    Inventor: Robert D. McClain
  • Patent number: 5276248
    Abstract: The present invention relates to the use of hydrocarbon-rich gels as a safe storage or transportation form for liquid hydrocarbons and to a process for the safe storage and safe transportion of liquid hydrocarbons, characterised in thata) the hydrocarbon is converted into a hydrocarbon-rich gel by addition of a surfactant and water andb) after storage or transportation has taken place, the hydrocarbon-rich gel is broken down again.
    Type: Grant
    Filed: September 2, 1992
    Date of Patent: January 4, 1994
    Assignee: Cassella Aktiengesellschaft
    Inventors: Fritz Engelhardt, Gerlinde Ebert, Heinz Hoffmann, Gerhard Platz, Werner Ritschel, deceased
  • Patent number: 5246469
    Abstract: Distillate fuel is stabilized against degradation during storage by inserting into storage tanks solid materials containing polar sites to enable polar condensation of the fuel constituents active in degradation. Polyether or polyester polyurethane open cell foams are the prime solid stabilizers proposed.
    Type: Grant
    Filed: February 29, 1988
    Date of Patent: September 21, 1993
    Assignee: The Commonwealth of Australia
    Inventors: William Arfelli, Alan Power, Richard Solly
  • Patent number: 5213678
    Abstract: 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: Grant
    Filed: February 8, 1991
    Date of Patent: May 25, 1993
    Assignee: Ashchem I.P., Inc.
    Inventors: Kaj D. Rondum, Guy A. DeVicaris, Dwight E. Emerich
  • Patent number: 5196619
    Abstract: 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: Grant
    Filed: January 29, 1991
    Date of Patent: March 23, 1993
    Inventors: Hsiang-ning Sun, John J. Cikut, Roque V. Martir, Jos P. Wristers
  • Patent number: 5189231
    Abstract: The filter plugging point and the pour-point at low temperatures of compositions based on liquid hydrocarbons from refining are improved by means of the addition, preferably in solution, of a mixture of an ethylene copolymer with another copolymerizable monomer and of an imidized acrylic polymer.
    Type: Grant
    Filed: April 29, 1991
    Date of Patent: February 23, 1993
    Assignee: Societa' Italiana Additivi Per Carburanti s.r.l.
    Inventors: Luciano Canova, Ettore Santoro, Luciano Bonoli, Paolo Falchi
  • Patent number: 5158666
    Abstract: 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: Grant
    Filed: August 13, 1990
    Date of Patent: October 27, 1992
    Assignee: Betz Laboratories, Inc.
    Inventor: Dwight K. Reid
  • Patent number: 5072064
    Abstract: Inhibition of popcorn polymer growth by treatment with a compound including a Group IV element, and at least one hydrogen bonded to the Group IV element. This compound can be admixed with organic material from which popcorn polymer is formed, or added to a system for the recovery, use or storage of such organic material.
    Type: Grant
    Filed: January 29, 1991
    Date of Patent: December 10, 1991
    Assignee: Exxon Chemical Patents Inc.
    Inventor: Hsiang-ning Sun
  • Patent number: 5072066
    Abstract: Inhibition of popcorn polymer growth by treatment with an inorganic acid ester. This compound can be admixed with organic material from which popcorn polymer is formed, or added to a system for the recovery, use or storage of such organic material.
    Type: Grant
    Filed: January 29, 1991
    Date of Patent: December 10, 1991
    Assignee: Exxon Chemical Patents Inc.
    Inventor: Hsiang-ning Sun
  • Patent number: 5072065
    Abstract: Inhibition of popcorn polymer growth by treatment with an alkyl halide. This compound can be admixed with organic material from which popcorn polymer is formed, or added to a system for the recovery, use or storage of such organic material.
    Type: Grant
    Filed: January 29, 1991
    Date of Patent: December 10, 1991
    Assignee: Exxon Chemical Patents Inc.
    Inventors: Hsiang-ning Sun, Steven J. Potlock
  • Patent number: 4997990
    Abstract: A process for stabilizing vinyl monomers in general, and ar-brominated styrene polymer in particular, against polymerization by mixing a vinyl monomer such as an ar-brominated styrene monomer with a stabilizing amount of iodine composition to produce a stabilized monomer and novel stabilized compositions.
    Type: Grant
    Filed: March 23, 1989
    Date of Patent: March 5, 1991
    Assignee: General Electric Company
    Inventors: Stephen M. Campbell, John C. Wozny
  • Patent number: 4952301
    Abstract: A method for inhibiting the formation of polymeric based fouling deposits normally formed during the caustic washing of hydrocarbons is disclosed. The method comprises adding an effective amount for the purpose of an ethylenediamine compound (e.g., ethylenediamine, diethylenetriamine, etc.) to the caustic wash system.
    Type: Grant
    Filed: November 6, 1989
    Date of Patent: August 28, 1990
    Assignee: Betz Laboratories, Inc.
    Inventor: Spencer S. Awbrey
  • Patent number: 4941968
    Abstract: Gum and sediment formation in liquid hydrocarbon mediums are inhibited by adding to the medium an alkyl 1,2-dihydroquinoline compound, dimer, trimer or polymer thereof. 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.
    Type: Grant
    Filed: July 28, 1989
    Date of Patent: July 17, 1990
    Assignee: Betz Laboratories, Inc.
    Inventor: Dwight K. Reid
  • Patent number: 4929778
    Abstract: Methods and compositions are provided for inhibiting the polymerization of styrene monomer during elevated temperature processing thereof or during storage or shipment of styrene containing product. The compositions comprise a combination of (a) a phenylenediamine compound having at least one N-H bond and (b) a hindered phenol compound. The methods comprise adding from 1-10,000 ppm of the combination to the styrene medium, per one million parts of styrene.
    Type: Grant
    Filed: June 5, 1989
    Date of Patent: May 29, 1990
    Assignee: Betz Laboratories, Inc.
    Inventor: Paul V. Roling
  • Patent number: 4922045
    Abstract: An oil consumption controlling additive for heavy duty diesel engines comprising a polymer.
    Type: Grant
    Filed: August 3, 1987
    Date of Patent: May 1, 1990
    Assignee: Texaco Inc.
    Inventors: William R. White, Mary A. Dahlstrom, Scott O. Lindholm
  • Patent number: 4820434
    Abstract: The present invention relates to a lubricating oil composition for traction drive, which consists essentially of:(A) a base oil containing as the main component a saturated hydrocarbon or hydrocarbons having fused ring and/or nonfused ring,(B) an ethylene-.alpha.-olefin copolymer having a number-average molecular weight of 800 to 8,000, and(C) an anti-wear agent.The lubricating oil compositions of the present invention are effectively used in winter and cold districts, since they have a high coefficient of traction and show a limited change in the coefficient of traction at low temperatures.
    Type: Grant
    Filed: February 25, 1988
    Date of Patent: April 11, 1989
    Assignee: Idemitsu Kosan Company Limited
    Inventors: Hitoshi Hata, Hisashi Machida
  • Patent number: 4777307
    Abstract: The oxidation stability of a refined hydrocarbon oil can be sigificantly improved by adding at least one cyclic sulfide and at least one aromatic compound to said oil.
    Type: Grant
    Filed: December 14, 1987
    Date of Patent: October 11, 1988
    Assignee: Exxon Research and Engineering Company
    Inventors: Sandra J. Alward, Michael A. Fefer
  • Patent number: 4714793
    Abstract: An extractive distillation process for selectively separating an ethylenically unsaturated hydrocarbon from a mixture containing hydrocarbon liquids having similar boiling points wherein an amine acts as a selective solvent and polymerization inhibitor. For example, styrene can be separated from a mixture of styrene and o-xylene using aminoethyl piperazine as the solvent for the distillation.
    Type: Grant
    Filed: May 2, 1986
    Date of Patent: December 22, 1987
    Assignee: The Dow Chemical Company
    Inventor: Ahazuerus T. van Eijl