Class 208/6 - Tar, pitch, or asphalt feed

Subclass of Class 208 - Mineral oils: processes and products
Definition: Processes wherein the material subjected to the oxidizing
No. of patents: 37
Last issue date: 03/08/2011

Number	Title	Issue Date
7901563	Preparation of industrial asphalt The present invention relates to a method for preparing an industrial asphalt comprising (1) heating an asphalt flux to a temperature which is within the range of about 400° F. (204° C.) to 550° F. (288° C.) to produce a hot asphalt flux, (2) sparging an oxygen ...	03/08/2011
7871509	Process and apparatus for modifying bitumen Apparatus for modifying bitumen. The apparatus includes a multi-section loop tube reactor A circulation pump (11) circulates bitumen in the reactor (10) and air is introduced at air injection point (13). Bitumen is introduced into the reactor (	01/18/2011
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
7220348	Method of producing high softening point pitch The present invention provides a way to increase the softening point of heavier hydrocarbons in a relatively low cost and low pressure process using superheated steam to i) increase the carbon yield of the heavier hydrocarbons, while simultaneously ii) removing vola...	05/22/2007
7186357	High swelling ramming paste for aluminum electrolysis cell A new ramming paste for aluminum reduction cell cathodes is a high swelling cold ramming paste made of a blend of pitch, light oil diluent and an aggregate comprising a mixture of anthracite and crushed anode butts or calcined coke. The presence of the crushed anode...	03/06/2007
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
6916435	Process of making graphite articles A process for preparing graphite articles is presented. In particular, the process includes employing a particulate fraction comprising at least about 35 weight percent coke, coal or combinations thereof having a diameter such that a major fraction of it passes thro...	07/12/2005
6913416	Bitumen or asphalt for the production of road surfaces, road surfaces, and method for the preparation of bitumen or asphalt Bitumen or asphalt for producing a road topping, whereby the bitumen or asphalt contains a proportion of paraffin obtained by Fischer-Tropsch synthesis (FT paraffin). A road topping with the bitumen and a method for producing a corresponding road topping or roadway ...	07/05/2005
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
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
6036843	Method for reducing hydrogen chloride emissions from an asphalt air-blowing process In a method for reducing hydrogen chloride emissions from an asphalt blowing process, ferric chloride and/or ferrous chloride are added to the asphalt. A chemical modifier is also added to the asphalt. The asphalt is subjected to a blowing process which p...	03/14/2000
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
5387333	Process for producing optically isotropic pitch An optically isotropic pitch can be obtained by a two-stage heat-treatment which combines a heat treatment with air-blowing under normal pressure with a heat treatment with air-blowing under a reduced pressure. Such a pitch is suitable for using as a raw ...	02/07/1995
5306415	Oxygenated pitch and processing same A method is provided which includes infusing oxygen into pitch material without stabilizing the oxygen-infused pitch material. In addition, the invention includes further processing steps (including heat stabilization in either an inert atmosphere or an o...	04/26/1994
5225070	Oxygenated pitch and processing same A method is provided which includes infusing oxygen into pitch material without stabilizing the oxygen-infused pitch material. In addition, the invention includes further processing steps (including heat stabilization in either an inert atmosphere or an o...	07/06/1993
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
4664774	Low solids content, coal tar based impregnating pitch A novel coal tar based, low solids content, pitch is produced by oxidizing a selected coal tar distillation fraction with air to oxygen at elevated temperatures. This pitch is applicable to end use in which low solids content is desirable. Specifically it...	05/12/1987
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
4456524	Process for enhancing catalytic response of asphalt oxidation catalyst Sodium carbonate, sodium sesquicarbonate and other carbonate catalysts ground to fine particle sizes (95% plus passing through a 200 mesh sieve (75 μm) are more active than commercially available grades of such catalysts when oxidizing asphalt fluxes, pe...	06/26/1984
4456523	Processes for producing high grade asphaltic materials from low grade bituminous materials and products resulting therefrom Disclosed is a process for producing high grade asphaltic materials from low grade bituminous materials and the improved products resulting therefrom. More particularly, there is disclosed a process utilizing a particular type of oxidation catalyst in pre...	06/26/1984
4424107	Organic surfactant oxidation promoters for hydrocarbons Liquid hydrocarbons are oxidized in the presence of an organic surfactant promoter....	01/03/1984
4177132	Process for the continuous production of petroleum-derived pitch A process for the continuous production of petroleum-derived pitch comprising the steps of subjecting a heavy fraction boiling at not lower than 150° C., the heavy fraction being obtained by the steam cracking of petroleum-derived hydrocarbons, to a spec...	12/04/1979
4176043	Process for preparing binder pitches A process for preparing a binder pitch, in which a high-aromatic residual fraction from petroleum raw materials is mixed with a coal tar fraction in weight ratios of about 1:9 to 9:1 and heated, while during heating the mixture is kept in contact with a d...	11/27/1979
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
4052290	Asphalt compositions Improved asphalt compositions are provided which are produced by forming a homogeneous blend of marginal asphalt stock with coal-derived asphaltenes, and air-blowing the homogeneous blend to yield an asphalt composition having a viscosity-penetration inde...	10/04/1977
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
4001091	Asphalt blowing vessel The undesirable and damaging reaction heat occurring during the blowing of asphalt is avoided by injecting water into the air inlet pipes of the reactor vessel heated by the hot asphalt surrounding them. During this, the superheated steam produced without...	01/04/1977
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
3935093	Bitumen blowing A bitumen blowing method comprises blowing air into a body of bitumen to produce an upward flow of bitumen relatively rich in air and a downward flow of bitumen relatively poor in air. The upward flow is agitated to disperse the air therein. A bitumen blo...	01/27/1976

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Class 208/6 - Tar, pitch, or asphalt feed