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| Number | Title | Issue Date |
| 7811444 | Oxidation of asphaltenes A method for processing asphaltenes is disclosed. The method can include separating asphaltenes from an asphaltene-containing composition and oxidizing the separated asphaltenes to form oxidation products. Alternatively, the method can include oxidizing asphaltenes ... | 10/12/2010 |
| 7393449 | Petroleum hydrocarbon binder with reduced polycyclic aromatic hydrocarbon content A binder pitch material includes a petroleum pitch and asphalt fraction obtained from petroleum crude oil and has a significantly lower polycyclic aromatic hydrocarbon composition than a coal tar pitch having a like softening point. The pitch material is useful as a... | 07/01/2008 |
| 7341656 | Continuous oxidation and distillation process of heavier hydrocarbon materials The present invention provides a way to process heavier hydrocarbons in a relatively low cost and low pressure process using a combination of superheated steam and at least one reaction gas to i) promote oxidation and thermal reaction of heavier hydrocarbons, while ... | 03/11/2008 |
| 7238408 | Roofing materials having engineered coatings An asphalt-based roofing material includes a coating having a top portion containing a mixture of asphalt and igneous and/or metamorphic rock particles, while the mat portion of the coating contains a mixture of asphalt and a filler which contains less than 10% igne... | 07/03/2007 |
| 7108780 | Oil desalting by forming unstable water-in-oil emulsions A method for determination for a given oil the relative stability of a water-in-oil emulsion that will be formed by that oil with water comprises measuring for the given oil the weight percent asphaltenes (A), total acid number (TAN), and ratio of the amount of naph... | 09/19/2006 |
| 7067050 | Petroleum hydrocarbon binder with reduced polycyclic aromatic hydrocarbon content A binder pitch material includes a petroleum pitch and asphalt fraction obtained from petroleum crude oil and has a significantly lower polycyclic aromatic hydrocarbon composition than a coal tar pitch having a like softening point. The pitch material is useful as a... | 06/27/2006 |
| 7033485 | Coal tar and hydrocarbon mixture pitch production using a high efficiency evaporative distillation process Described are methods that utilize high efficiency evaporative distillation to make a high softening point coal tar pitch, a quinoline insoluble-free and ash-free coal tar pitch having a desired softening point, and a mesophase coal tar pitch. Each of the methods us... | 04/25/2006 |
| 7008236 | Set of printed circuit boards comprising replacement board A set of printed circuit boards consists of a main board with at least one fragment intended for replacement and at least one replacement board, wherein said main board has openings in the dielectric layer placed along the edge line of the fragment intended for repl... | 03/07/2006 |
| 6761818 | Heavy oil-solid composition and method for preparing the same The invention includes a compositon of matter comprising a heavy oil having dispersed therein surface modified solid wherein said surface modified solids comprise solids having adsorbed thereon air oxidized polar hydrocarbons from said heavy oil and wherein said sur... | 07/13/2004 |
| 6717021 | Solvating component and solvent system for mesophase pitch A solvating component for a solvated mesophase pitch. The solvated component includes a mixture of aromatic hydrocarbons having boiling points in the atmospheric equivalent boiling point range of about 285° to about 500° C. (about 550° F.-932° F.). At least 80% ... | 04/06/2004 |
| 6582588 | High temperature, low oxidation stabilization of pitch fibers The present invention provides a process for thermosetting pitch fibers in reduced times, at low concentrations of oxygen and at higher temperatures than previously possible. Additionally, the present invention provides a pitch fiber which has an oxygen d... | 06/24/2003 |
| 6524468 | Heavy oil - solid composition and method for preparing the same The invention includes a compositon of matter comprising a heavy oil having dispersed therein surface modified solid wherein said surface modified solids comprise solids having adsorbed thereon air oxidized polar hydrocarbons from said heavy oil and where... | 02/25/2003 |
| 6325986 | Method for reducing hydrogen chloride emissions from air-blown asphalt In a method for reducing hydrogen chloride emissions from an asphalt air-blowing process, an asphalt is subjected to an air-blowing process where air is bubbled through hot asphalt to raise the softening point of the asphalt. The fumes from the air-blowin... | 12/04/2001 |
| 5824207 | Method and apparatus for oxidizing an organic liquid The present invention relates generally to a method and apparatus for oxidizing an organic liquid, and, more particularly, to a method and apparatus for improving the combustion characteristics of petroleum-based hydrocarbon liquids. The present invention... | 10/20/1998 |
| 5470455 | Process for converting acid sludge to intermediate sludge and soft and/or hard asphalt A process for converting the acid sludge produced by waste oil refineries into an intermediate sludge which can be used in the production of either soft, un-oxidized asphalt or hard, oxidized asphalt, and a process for converting the intermediate sludge i... | 11/28/1995 |
| 5429739 | Pitch precursor production by distillation An improved wiped film evaporator (WFE) process for removing low molecular weight species from a hydrocarbyl mixture is disclosed, wherein partial oxidation of a hydrocarbyl mixture precedes the WFE step. Faster rates of distillation are achieved without ... | 07/04/1995 |
| 5320739 | Method of producing asphalt having an increased penetration and penetration index This invention relates to a method of producing a softer asphalt product with improved low temperature properties and reduced solids buildup from an asphalt feed which comprises measuring the penetration and Penetration Index of the asphalt feed and heat ... | 06/14/1994 |
| 5228977 | Method of producing asphalt having an increased penetration and penetration index This invention relates to a method for producing asphalt that has improved low temperature properties. More specifically, the penetration and Penetration Index of an asphalt can be increased if the asphalt is heat soaked in the presence of a dehydrogenati... | 07/20/1993 |
| 5059300 | Asphalts modified by solvent deasphalted bottoms and phosphoric acid Disclosed is a method for modifying the physical properties of a bituminous material which comprises heating at an elevated temperature a mixture comprising: (a) 0.1 to 20.0 percent by weight phosphoric acid; (b) 1 to 15 percent by weight solvent deasphalted b... | 10/22/1991 |
| 4975176 | Process for the production of bitumens of a high penetration value, apparatus for carrying it out, and products thus obtained The process permits to produce bitumens having a high penetration value by oxidation of base bitumens with small volumes of gaseous oxidizers, preferably air, at a temperature between 170° and 250°, preferably 200° C., by turbodispersion of the gaseous... | 12/04/1990 |
| 4971679 | Plasticizer and method of preparing pitch for use in carbon and graphite production A plasticizer for use in the manufacture of pitch which forms a fluid at room temperature consisting essentially of a tar composed of low molecular weight and polymerized aromatic hydrocarbons having a molecular weight distribution characteristic which is... | 11/20/1990 |
| 4904371 | Process for the production of mesophase pitch An improved process for producing an anisotropic pitch product suitable for carbon fiber manufacture. A carbonaceous feedstock substantially free of mesophase pitch is heated for a period of time at an elevated temperature while passing an oxidatively rea... | 02/27/1990 |
| 4892642 | Process for the production of mesophase An improved process for producing an anisotropic pitch product suitable for carbon fiber manufacture. A carbonaceous feedstock substantially free of mesophase pitch is heated at elevated temperature while passing an oxidatively reactive sparging gas such ... | 01/09/1990 |
| 4892641 | Process for the production of mesophase pitch An improved process for producing an anisotropic pitch product suitable for carbon fiber manufacture. A carbonaceous feedstock substantially free of mesophase pitch is heated at elevated temperature while passing an oxidatively reactive sparging gas such ... | 01/09/1990 |
| 4883581 | Pretreatment for reducing oxidative reactivity of baseoils Method of producing a baseoil having a reduced coking tendency by removing precursors from the baseoil. Baseoil having reduced coking tendencies which comprises a substantially no coking precursors therein.... | 11/28/1989 |
| 4474617 | Pitch for carbon fibers A pitch which affords a carbon fiber having a high strength and a high elastic modulus is obtained by treating a pitch containing 5 to 35 wt. % of an optically anisotropic region with an oxidizing gas, followed by hydrogenation treatment if required.... | 10/02/1984 |
| 4424107 | Organic surfactant oxidation promoters for hydrocarbons Liquid hydrocarbons are oxidized in the presence of an organic surfactant promoter.... | 01/03/1984 |
| 4096056 | Method of producing an impregnating petroleum pitch A method for producing an impregnating petroleum pitch in two steps. In the first step, aromatic oils undergo polymerization with a controlled feed of an oxygen-containing gas at a temperature of less than 700° F to a softening point of from about 30° t... | 06/20/1978 |
| 4039423 | Preparation of petroleum pitch A process having a particular sequence of steps, each under specified conditions, for preparing a petroleum pitch binder suitable for electrodes used in smelting aluminum is disclosed. In the essential steps of the invention a decant oil petroleum fractio... | 08/02/1977 |
| 4013540 | Petroleum pitch preparation A process having a specified sequence of steps for preparing a petroleum pitch binder suitable for electrodes used in smelting aluminum is disclosed, in which a decant oil petroleum fraction is oxy-activated under specified conditions of temperature, pres... | 03/22/1977 |
| 3989616 | Production of lubricating oils blending stocks and selected components for asphalt production The production of normal and premium lube grade blending stocks of 100, 300 and 700 second neutral material along with high boiling by-product material for the manufacture of asphalts is improved by using a low pressure vacuum tower provided with an overf... | 11/02/1976 |
