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| Number | Title | Issue Date |
| 7682410 | Gas odorant The present invention refers to the use as gas odorant of alkoxy alkynes of formula (I) wherein R1 is methoxy or ethoxy; and R2 is hydrogen or methyl, to a process of odorizing gas and to fuel gas comp... | 03/23/2010 |
| 7175678 | Fuel composition The present invention provides a polymeric a fuel composition comprising (i) a fuel; and (ii) a polymeric compound; wherein the polymeric compound comprises at least one monomer unit of Formula I wherein R1 ... | 02/13/2007 |
| 7157611 | Pyrazinoporphyrazines as markers for liquid hydrocarbons A method for marking a liquid petroleum hydrocarbon. The method comprises adding to the liquid petroleum hydrocarbon a pyrazinoporphyrazine dye having an absorption maximum from 700 nm to 900 nm. ... | 01/02/2007 |
| 7112230 | Fuels compositions for direct injection gasoline engines Injector deposits in a direct injection gasoline engine are reduced by providing as fuel for the operation of said direct injection engine a fuel composition comprising a fuel-soluble compound having the formula (I): | 09/26/2006 |
| 6872230 | Lubricity additives for low sulfur hydrocarbon fuels The present invention relates to additives for enhancing the lubricity of hydrocarbon fuel oils, the inventive additive composition including one or more of the reaction products of (i) an alkylated polyamine and (ii) urea or isocyanate, or the salt adducts of these... | 03/29/2005 |
| 6835216 | Chain-breaking antioxidants Compounds, preferably 5-pyrimidinol and 3-pyridinol derivatives, that act as effective chain breaking antioxidants of both the lipid and water-soluble variety (analogous to the natural Vitamins E and C), many of which are more reactive toward peroxyl radicals than t... | 12/28/2004 |
| 6676715 | Diesel fuel stabilizer There is provided use of a thermal stabiliser for increasing the thermal stability of a cetane improver in a fuel composition comprising (i) a fuel, and (ii) the cetane improver wherein the thermal stabiliser is a compound of the formula wherein H is a gr... | 01/13/2004 |
| 6361573 | Fuel dispersants with enhanced lubricity Reaction products of i) a hydroxyl-group containing compound; ii) an amine-group containing compound, wherein component ii) is different from component i); and iii) a hydrocarbyl-substituted succinic acylating agent provide improved detergency as well as ... | 03/26/2002 |
| 6328771 | Fuel compositions containing lubricity enhancing salt compositions A fuel composition comprising a major amount of hydrocarbon fuel and a minor lubricity improving amount of a composition made by reacting component (A) with component (B) under unit-forming conditions; component (A) comprising a carboxylic acid represented by ... | 12/11/2001 |
| 5856279 | Acylated nitrogen compounds useful as additives for lubricating oil and fuel compositions A process for reacting certain carboxylic reactants and at least one aldehyde or ketone with olefinic compounds then reacting the product prepared thereby with ammonia, a hydrazine or an amine, products prepared thereby and, additive concentrates, lubrica... | 01/05/1999 |
| 5779742 | Acylated nitrogen compounds useful as additives for lubricating oil and fuel compositions A process for reacting certain carboxylic reactants and at least one aldehyde or ketone with olefinic compounds then reacting the product prepared thereby with ammonia, a hydrazine or an amine, products prepared thereby and, additive concentrates, lubrica... | 07/14/1998 |
| 5755833 | Fuel additive A fuel additive comprising a urethane compound. A gasoline composition comprising gasoline blended with a urethane compound to suppress sludge or deposits in fuel intake systems or combustion chambers, such as an automobile engine.... | 05/26/1998 |
| 5584265 | Method for reducing NOx in the exhaust streams of internal combustion engines The invention discloses a method of reducing the concentration of NOx in the exhaust streams of internal combustion ignitions wherein a selected producing agent is introduced into the combustion chamber of such an engine via the fuel and/or air... | 12/17/1996 |
| 5478367 | Fuel oil compositions The addition to diesel or jet fuel of macrocyclic polyamines, especially those derived from PIBSA, or hydrocarbyl polyamines reduces particle emission, especially in association with organic nitrate cetane improvers.... | 12/26/1995 |
| 5460634 | Fuel oil treatment An additive comprising an oil-soluble stable free radical, such as a nitroxide, or a precursor therefor, is used in a fuel oil to reduce, on combustion of the fuel oil, one or more of particulate emissions, hydrocarbon emissions, carbon monoxide emissions... | 10/24/1995 |
| 5460633 | Fuel oil treatment An additive comprising an oil-soluble polymer of a C2 to C6 mono-olefin such as polyisobutylene, which polymer has a molecular weight of less than about 500, is used in a fuel oil to reduce, on combustion of the fuel oil, one or more of particulate emissi... | 10/24/1995 |
| 5324334 | Macrocyclic polyamide and polycyclic polyamine multifunctional fuel additive compositions There are disclosed macrocyclic and polycyclic polyamine lubricating oil additives formed by cyclodehydration of reaction products of hydrocarbon substituted succinic anhydrides or carboxylic acids with poly 3-amino propyl compounds or by acylation of mac... | 06/28/1994 |
| 5266080 | Methanol fuel containing flame luminosity agent The flame luminosity of a methanol fuel is appreciably enhanced by the addition thereto of at least one flame luminosity enhancing agent selected from the group consisting of azine dye, triarylmethane dye, fluorescein dye, imine dye and anthraquinone dye,... | 11/30/1993 |
| 5162049 | Middle distillate fuels and additives therefor This invention relates to stabilizer additives for hydrocarbonaceous fuels comprising at least one or a mixture of hexahydrotriazine compounds and at least one or a mixture of imine compounds.... | 11/10/1992 |
| 5158667 | Methods for inhibiting fouling in fluid catalytic cracking units This invention relates to processes for inhibiting fouling in fluid catalytic cracking units. The processes comprise adding to the hydrocarbon being processed a polymer formation inhibiting amount of aminoethyl piperazine.... | 10/27/1992 |
| 5158666 | Use of 1-(2-aminoethyl) piperazine to inhibit heat exchange fouling during the processing of hydrocarbons 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. T... | 10/27/1992 |
| 5024677 | Corrosion inhibitor for alcohol and gasohol fuels Rust of ferrous metal surfaces that are in contact with gasohol or alcohol fuels is inhibited by the addition of a corrosion inhibiting amount of the combination of (A) a substituted imidazoline and (B) an alkenyl succinimide of a mixture of alkylenepolya... | 06/18/1991 |
| 5000759 | Stable middle distillate fuel-oil compositions A stable middle distillate fuel-oil composition which comprises (a) a major portion of a middle distillate fuel-oil; and (b) a minor amount, as storage stabilizing additive, of a N-2-pyridyl succinimide of a copolymer and maleic anhydride graft.... | 03/19/1991 |
| 4936866 | Lactone modified polymeric amines useful as oil soluble dispersant additives Hydroxyl terminated polymeric C5 -C9 lactone adducts are made by reacting a C5 -C9 lactone with the reaction product of a C2 -C10 olefin polymer or a halogenated derivative thereof having a ... | 06/26/1990 |
| 4919685 | Stable middle distillate fuel-oil compositions A stable middle distillate fuel-oil composition which comprises (a) a major portion of a middle distillate fuel-oil; and (b) a minor amount, as a storage stabilizing additive, of an aliphatic N(N',N'-dimethyl aminopropyl) succinimide of a copolymer and maleic ... | 04/24/1990 |
| 4906252 | Polyolefinic succinimide polyamine alkyl acetoacetate adducts as dispersants in fuel oil compositions This invention is to a fuel oil composition containing polyolefinic succinimide polyamine alkyl acetoacetate adducts of the general following: ##STR1## wherein the variables are defined herein. The adduct additives are especially useful in concentrat... | 03/06/1990 |
| 4900427 | Antifoulant compositions and methods Fouling of heat exchangers in chemical processing or oil refining systems is inhibited by incorporating into a petroleum derived stock an effective antifouling amount of a mixture of (a) a condensation product of an alkylphenol, an aldehyde, and an amine; ... | 02/13/1990 |
| 4897087 | Diisocyanate derivatives as ashless fuel dispersants and detergents and fuel compositions containing same Reaction products in which polyethers are connected to polyamines using diisocyanates have been found to be effective ashless dispersants and detergents for fuel.... | 01/30/1990 |
| 4895578 | Hydrocarbon fuel detergent Detergents for hydrocarbon fuels, and hydrocarbon fuels containing detergents are provided wherein the detergent is comprised of an alkenylsuccinimide prepared by reacting an alkenylsuccinic acid or anhydride with a mixture of amines. The alkenyl substitu... | 01/23/1990 |
| 4877416 | Synergistic fuel compositions Disclosed is a synergistic fuel composition containing a hydrocarbyl-substituted amine or polyamine and a poly(oxyalkylene) monool. These compositions provide for an unexpected decrease in those deposits which have been correlated to Octane Requirement In... | 10/31/1989 |
| 4871374 | Fuel oils stabilized with imine-enamine condensates and method thereof A fuel oil stabilized with an imine-enamine condensate which is the reaction product of an aldehyde having at least two carbon atoms and/or a ketone and a polyamine of the formula: ##STR1## wherein n is 0 or an integer from 1 to 6, M is a carbon or n... | 10/03/1989 |
| 4866135 | Heterocyclic amine terminated, lactone modified, aminated viscosity modifiers of improved dispersancy Polymer C5 -C9 derivatives are made by reacting a C5 -C9 lactone with an aminoalkyl derivative, e.g., N-(3-aminopropyl) morpholine, to form an adduct having a hydroxyl group on one end thereof and a tertiary ami... | 09/12/1989 |
| 4863487 | Hydrocarbon fuel detergent Detergents for hydrocarbon fuels, and hydrocarbon fuels containing detergents are provided wherein the detergent is comprised of an alkenylsuccinimide prepared by reacting an alkenylsuccinic acid or anhydride with a mixture of amines. The alkenyl substitu... | 09/05/1989 |
| 4859210 | Motor fuel or lubricant composition containing polybutyl or polyisobutyl derivatives Fuel motor compositions and lubricant compositions contain small amounts of one or more polybutyl or polyisobutyl alcohols of the formula (I) where R is a polybutyl or polyisobutyl radical derived from isobutene and up to 20% by weight of n-butene, or a corres... | 08/22/1989 |
| 4844714 | Fuels containing small amounts of alkoxylates and polycarboximides Fuels for gasoline engines and diesel engines contain small amounts (A) of an alkoxylate which is obtained by reacting ethylene oxide, propylene oxide or butylene oxide with a mono- or polyhydroxy compound and has a number average molecular weight (molecular m... | 07/04/1989 |
| 4780495 | N -(substituted)--(3,5-dialkyl-4-hydroxyphenyl)-,-disu bstituted acetamides, and composition stabilized therewith N-(substituted)-1-(piperazinealkyl)--(3,5-dialkyl-4-hydroxyphenyl)-. alpha.,-disubstited acetamides, are novel compounds prepared by a novel modification of the ketoform process. The compounds are useful as stabilizers for organic materials s... | 10/25/1988 |
| 4744881 | Antioxidant material and its use The present invention is directed to antioxidant materials and their use in petroleum and petrochemical processes to reduce and/or control fouling problems specifically as regards hydrocarbons having a bromine number of greater than 10 and containing oxyg... | 05/17/1988 |
| 4740321 | Two-cycle engine oils containing sulfurized alkyl phenols Lubricating oils are described which are useful in two-cycle engines. These oils contain a minor amount of at least one phenolic compound of the general formula: (R)a --AR--(OH)b, or salts thereof, wherein R is a substantially saturated, ... | 04/26/1988 |
| 4648885 | Process and composition for stabilized distillate fuel oils This invention relates to processes and compositions for stabilized distillate fuel oils, such as straight-run diesel fuel, which comprise an effective stabilizing amount of (a) N-(2-aminoethyl)piperazine, (b) triethylenetetramine, and (c) N,N-diethylhydr... | 03/10/1987 |
| 4647290 | Process and composition for color stabilized distillate fuel oils This invention relates to processes and compositions for color stabilized distillate fuel oils, such as straight-run diesel fuel, which comprises an effective color stabilizing amount of (a) N-(2-aminoethyl)piperazine and (b) N,N-diethylhydroxylamine.... | 03/03/1987 |
