Tar, Pitch, Or Asphalt Feed Patents (Class 208/6)
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Patent number: 12049591Abstract: Between 40% and 75% by weight of a first bitumen base B1 an asphalt obtained by a solvent deasphalting of a first vacuum residue R1 resulting from the distillation of an effluent hydroconverted by a process for the ebullated bed hydroconversion of a heavy hydrocarbon feedstock, and Between 25% and 60% by weight of a second bitumen base B2 and/or of a flux F, F at least one heavy aromatic cut with a hydrogen content of greater than 8.5% by weight, B2, R1 or a second vacuum residue R2 resulting from a distillation of a crude oil or a mixture of R1 and R2.Type: GrantFiled: August 24, 2021Date of Patent: July 30, 2024Assignee: IFP ENERGIES NOUVELLESInventors: Alain Quignard, Wilfried Weiss, Isabelle Merdrignac, Jeremie Barbier
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Patent number: 10125299Abstract: Providing a treatment fluid comprising a base fluid and a lost circulation material comprising brown mud. The treatment fluid is introduced into a wellbore within the subterranean formation such that at least a portion of the brown mud bridges openings in the subterranean formation to reduce loss of fluid circulation into the subterranean formation.Type: GrantFiled: January 30, 2015Date of Patent: November 13, 2018Assignee: Halliburton Energy Services, Inc.Inventors: Thomas Jason Pisklak, Kyriacos Agapiou, Darrell Chad Brenneis, James Robert Benkley, Jiten Chatterji
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Patent number: 9656889Abstract: A surface active compound is supplied into contact with an oilfield production fluid that comprises a mixture of water and oil including water soluble organics. The surface active compound comprises at least one alkoxylate chain and at least one end group attached to each of the at least one alkoxylate chain. The surface active compound is supplied into the oilfield production fluid at a dosage rate that is effective to self-associate at interfaces between the water and oil and inhibit the water soluble organics in the oil from entering the water when the oilfield production fluid is depressurized.Type: GrantFiled: August 28, 2013Date of Patent: May 23, 2017Assignee: Ecolab USA Inc.Inventors: Rebecca M. Lucente-Schultz, Ronald O. Bosch, Manojkumar Bhandari, Robert Perry
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Patent number: 9556383Abstract: The present invention relates to a method for oxidizing asphalt which comprises dispersing an oxygen containing gas throughout an asphalt flux in an oxidation zone while the asphalt flux is maintained at a temperature which is within the range of about 400° F. to 550° F., wherein the oxygen containing gas is introduced into the oxidation zone through a recycle loop. The recycle loop pumps asphalt flux from the oxidation zone and reintroduces the asphalt flux into the oxidation zone as oxygen enhanced asphalt flux. The recycle loop will typically include a pump which pulls the asphalt flux from the oxidation zone and which pumps the oxygen enhanced asphalt flux into the oxidation zone, and wherein the oxygen containing gas is injected into the recycle loop at a point before the asphalt flux enters into the pump.Type: GrantFiled: March 13, 2014Date of Patent: January 31, 2017Assignee: Building Materials Investment CorporationInventors: Nicholas Soto, Dale Kelley, Paul Richardson, Daniel Boss
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Patent number: 9068129Abstract: Methods are provided for upgrading the quality of an asphalt containing wax. This can include base asphalts that naturally contain elevated levels of wax, such as base asphalts with a wax content of at least 3.0 wt %. Additionally or alternately, this can include a base asphalt containing subsequently added wax. Wax generated at a refinery can be added to an asphalt along with a pour point depressant to form an asphalt product. The additional wax can reduce the viscosity of the asphalt product at higher temperatures so that the asphalt product can be mixed and stored at a tower temperature. Additionally, the pour point depressant can unexpectedly improve the low temperature properties of the wax-containing asphalt product.Type: GrantFiled: September 20, 2012Date of Patent: June 30, 2015Assignee: EXXONMOBIL RESEARCH AND ENGINEERING COMPANYInventors: Pavel Kriz, Katherine Lynn Sokol
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Publication number: 20140374310Abstract: Provided is a process for increasing the softening temperature of asphalts by use of liquid jet ejector with a diptube connected to the discharge connection of the liquid jet ejector for ejecting an air/asphalt mixture below a liquid level in an oxidizer vessel. The liquid jet ejector is used as both an air compressor and an air/oil mixer. The liquid jet ejector motive fluid is hot asphalt and the entrained vapor is air. The combined liquid jet ejector with a diptube process provides for an improvement in asphalt air blowing efficiency by requiring less cumulative air to produce a given asphalt softening temperature.Type: ApplicationFiled: September 12, 2014Publication date: December 25, 2014Applicant: EXXONMOBIL RESEARCH AND ENGINEERING COMPANYInventor: Keith K. Aldous
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Publication number: 20140262935Abstract: The present invention relates to a method for oxidizing asphalt which comprises dispersing an oxygen containing gas throughout an asphalt flux in an oxidation zone while the asphalt flux is maintained at a temperature which is within the range of about 400° F. to 550° F., wherein the oxygen containing gas is introduced into the oxidation zone through a recycle loop. The recycle loop pumps asphalt flux from the oxidation zone and reintroduces the asphalt flux into the oxidation zone as oxygen enhanced asphalt flux. The recycle loop will typically include a pump which pulls the asphalt flux from the oxidation zone and which pumps the oxygen enhanced asphalt flux into the oxidation zone, and wherein the oxygen containing gas is injected into the recycle loop at a point before the asphalt flux enters into the pump.Type: ApplicationFiled: March 13, 2014Publication date: September 18, 2014Applicant: BUILDING MATERIALS INVESTMENT CORPORATIONInventors: Nicholas Soto, Dale Kelley, Paul Richardson, Daniel Boss
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Patent number: 8747651Abstract: A high coking value pitch prepared from coal tar distillate and has a low softening point and a high carbon value while containing substantially no quinoline insolubles is disclosed. The pitch can be used as an impregnant or binder for producing carbon and graphite articles.Type: GrantFiled: May 22, 2008Date of Patent: June 10, 2014Assignee: GrafTech International Holdings Inc.Inventors: Douglas J. Miller, Ching-Feng Chang, Irwin C. Lewis, Richard T. Lewis
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Patent number: 8529687Abstract: 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 within an asphaltene-containing composition without first separating the asphaltenes. Once formed, the oxidation products can be combined with other hydrocarbons. The amount of oxidation can be limited to an amount sufficient to produce a mixture suitable for the desired application. This method can be used to upgrade asphaltenes from a variety of sources, including oil sands. The oxidation step can be performed, for example, by introducing an oxidizing agent and, in some cases, a catalyst into the asphaltenes. A solvent or miscibility agent also can be introduced to improve mixing between the oxidizing agent and the asphaltenes.Type: GrantFiled: August 26, 2010Date of Patent: September 10, 2013Assignee: Marathon Oil Canada CorporationInventors: Willem P. C. Duyvesteyn, Raymond L. Morley
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Publication number: 20130228493Abstract: A method of processing light fraction tar includes pre-heating the light fraction tar before directing it through a reactor. The reactor has a top and a bottom and a surface spanning between said top and said bottom. A film of the light fraction tar flows down the surface under the force of gravity and with heated gas blowing thereon. The portion of the film that reaches the bottom of the reactor has improved properties making it more widely useful for carbon products.Type: ApplicationFiled: November 11, 2011Publication date: September 5, 2013Applicant: GrafTech International Holdings Inc.Inventors: Chong Chen, Philip Dennis Coleman
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Patent number: 8268066Abstract: It has been unexpectedly found that the solvent extracted aromatic cut of heavy vacuum gas oil can be oxidized to produce an adhesive composition that has all the needed attributes of a self seal adhesive for asphalt roofing shingles. This self seal adhesive composition offers numerous benefits and advantages over conventional self seal adhesives for roofing applications. For instance, it does not require any volatile organic solvents and is accordingly environmentally friendly. Additionally, it does not contain any asphalt or polymers and will not phase separate and accordingly offers excellent long term stability.Type: GrantFiled: September 2, 2010Date of Patent: September 18, 2012Assignee: Building Materials Investment CorporationInventor: William K. Longcor, IV
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Patent number: 8083931Abstract: The invention is directed to a process wherein a feedstock or stream comprising steam cracker tar is passed to a vacuum pipestill. A deasphalted cut of tar is obtained as an overhead (or sidestream) and a heavy tar asphaltenic product is obtained as bottoms. In preferred embodiments, at least a portion of the bottoms product is sent to a partial oxidation unit (POX) wherein syn gas may be obtained as a product, and/or at least a portion of the bottoms product is used to produce a light product stream in a coker unit, such as coker naphtha and/or or coker gas oil. In another preferred embodiment at least a portion of the overheads product is added to refinery fuel oil pools and in yet another preferred embodiment at least a portion of the overheads product is mixed with locally combusted materials to lower soot make. Two or more of the aforementioned preferred embodiments may be combined.Type: GrantFiled: July 25, 2007Date of Patent: December 27, 2011Assignee: ExxonMobil Chemical Patents Inc.Inventors: James N. McCoy, Paul F. Keusenkothen, Alok Srivastava, James E Graham
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Patent number: 8043494Abstract: In a method for increasing the efficiency of bitumen recovery from oil sands, bitumen asphaltenes naturally present in the oil sands ore are treated with selected chemical agents to produce surfactants which reduce surface and interfacial tensions and promote the production of bitumen-water emulsions, thus facilitating the extraction and recovery of bitumen for use in producing synthetic crude oil. The agents react with the asphaltenes by oxidation, sulfonation, sulfoxidation, or sulfomethylation reactions, or by a combination of such reactions. These reactions may be initiated by adding selected agents into water-based oil sand slurries in process vessels or in pipelines. Alternatively, the agents may be injected directly into subsurface oil sand formations for in situ production of surfactants to enhance the efficiency of in situ thermal bitumen recovery processes.Type: GrantFiled: December 9, 2005Date of Patent: October 25, 2011Inventor: Baki Ozum
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Patent number: 7906010Abstract: The invention relates to the use of steam cracked tar with the bottoms product of a flash drum integrated with a pyrolysis furnace. In embodiments, the steam cracked tar is added to fuel oil.Type: GrantFiled: January 13, 2006Date of Patent: March 15, 2011Assignee: ExxonMobil Chemical Patents Inc.Inventors: Paul F. Keusenkothen, Alok Srivastava
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Patent number: 7901563Abstract: 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 containing gas through the hot asphalt flux for a period of time which is sufficient to increase the softening point of the asphalt flux to a value of at least 100° F. (38° C.), to produce an underblown asphalt composition; and (3) mixing a sufficient amount of a polyphosphoric acid throughout the underblown asphalt composition while the underblown asphalt composition is maintained at a temperature which is within the range of 200° F. (93° C.) to 550° F. (288° C.) to attain a softening point which is within the range of 185° F. (85° C.) to 250° F. (121° C.) and a penetration value of at least 15 dmm at 77° F. (25° C.) to produce the industrial asphalt.Type: GrantFiled: February 1, 2006Date of Patent: March 8, 2011Assignee: Building Materials Investment CorporationInventors: Yonghong Ruan, William K. Longcor, IV, Peter Lars Johnson
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Patent number: 7871509Abstract: 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 (10) at inlet (14) by variable speed pump P1. A plurality of mixers (15) are located between the air injection point (13) and a head section (24) beyond which is an outlet (27) where modified bitumen is drawn off by variable speed pump P2.Type: GrantFiled: July 20, 2005Date of Patent: January 18, 2011Inventor: John Brodie Matthews
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Publication number: 20100320118Abstract: 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 within an asphaltene-containing composition without first separating the asphaltenes. Once formed, the oxidation products can be combined with other hydrocarbons. The amount of oxidation can be limited to an amount sufficient to produce a mixture suitable for the desired application. This method can be used to upgrade asphaltenes from a variety of sources, including oil sands. The oxidation step can be performed, for example, by introducing an oxidizing agent and, in some cases, a catalyst into the asphaltenes. A solvent or miscibility agent also can be introduced to improve mixing between the oxidizing agent and the asphaltenes.Type: ApplicationFiled: August 26, 2010Publication date: December 23, 2010Applicant: MARATHON OIL CANADA CORPORATIONInventors: Willem P.C. Duyvesteyn, Raymond L. Morley
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Patent number: 7811444Abstract: 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 within an asphaltene-containing composition without first separating the asphaltenes. Once formed, the oxidation products can be combined with other hydrocarbons. The amount of oxidation can be limited to an amount sufficient to produce a mixture suitable for the desired application. This method can be used to upgrade asphaltenes from a variety of sources, including oil sands. The oxidation step can be performed, for example, by introducing an oxidizing agent and, in some cases, a catalyst into the asphaltenes. A solvent or miscibility agent also can be introduced to improve mixing between the oxidizing agent and the asphaltenes.Type: GrantFiled: June 8, 2006Date of Patent: October 12, 2010Assignee: Marathon Oil Canada CorporationInventors: Willem P. C. Duyvesteyn, Raymond L. Morley
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Patent number: 7625479Abstract: 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 binder material for various applications such as clay pigeons.Type: GrantFiled: June 12, 2008Date of Patent: December 1, 2009Assignee: Marathon Ashland Petroleum LLCInventors: Melvin D. Kiser, David C. Boyer
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Patent number: 7585407Abstract: Embodiments of a method and a system for recovering energy, materials or both from asphaltene-containing tailings are disclosed. The asphaltene-containing tailings can be generated, for example, from a process for recovering hydrocarbons from oil sand. Embodiments of the method can include a flotation separation and a hydrophobic agglomeration separation. Flotation can be used to separate the asphaltene-containing tailings into an asphaltene-rich froth and an asphaltene-depleted aqueous phase. The asphaltene-rich froth, or an asphaltene-rich slurry formed from the asphaltene-rich froth, then can be separated into a heavy mineral concentrate and a light tailings. Hydrophobic agglomeration can be used to recover an asphaltene concentrate from the light tailings. Another flotation separation can be included to remove sulfur-containing minerals from the heavy mineral concentrate. Oxygen-containing minerals also can be recovered from the heavy mineral concentrate.Type: GrantFiled: March 7, 2006Date of Patent: September 8, 2009Assignee: Marathon Oil Canada CorporationInventors: Willem P. C. Duyvesteyn, Julian Kift, Raymond L. Morley
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Patent number: 7393449Abstract: 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 binder material for various applications such as clay pigeons.Type: GrantFiled: May 31, 2006Date of Patent: July 1, 2008Assignee: Marathon Ashland Petroleum LLCInventors: Melvin D. Kiser, David C. Boyer
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Patent number: 7341656Abstract: 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 simultaneously ii) removing volatile components with a steam stripping process.Type: GrantFiled: July 26, 2004Date of Patent: March 11, 2008Assignee: Marathon Ashland Petroleum Co. LLCInventors: Donald P. Malone, Patricia K. Doolin, Howard F. Moore
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Patent number: 7220348Abstract: 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 volatile components with a steam stripping process.Type: GrantFiled: July 27, 2004Date of Patent: May 22, 2007Assignee: Marathon Ashland Petroleum LLCInventors: Donald P. Malone, Howard F. Moore, Melvin D. Kiser
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Patent number: 7186357Abstract: 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 butts or calcined coke increases the sodium swelling index of the paste by about four times higher than that of regular ramming pastes. This new high swelling cold ramming paste may also contain an amount of a refractory hard material, such as TiB2.Type: GrantFiled: March 12, 2003Date of Patent: March 6, 2007Assignee: Alcan International LimitedInventors: Amir A. Mirchi, Weixia Chen, Lise Lavigne, Emmanuel Bergeron, Jules Bergeron
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Patent number: 7067050Abstract: 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 binder material for various applications such as clay pigeons.Type: GrantFiled: November 14, 2002Date of Patent: June 27, 2006Assignee: Marathon Ashland Petroleum LLCInventors: Melvin D. Kiser, David C. Boyer
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Patent number: 6717021Abstract: 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% of the carbon atoms of the hydrocarbons are aromatic as characterized by carbon 13 NMR. The aromatic hydrocarbons are selected from a group consisting of aromatic compounds having 2 to 5 aromatic rings, substituted aromatic compounds having 2 to 5 aromatic rings wherein said substituents are alkyl groups having 1 to 3 carbons, hydroaromatic compounds having 2 to 5 rings, substituted aromatic compounds having 2 to 5 rings wherein said substituents are alkyl groups having 1 to 3 carbons, and mixtures thereof.Type: GrantFiled: June 4, 2001Date of Patent: April 6, 2004Assignee: ConocoPhillips CompanyInventors: H. Ernest Romine, John A. Rodgers, W. Mark Southard, Edward J. Nanni
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Publication number: 20030178340Abstract: 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 diffusion rate to the center of the fiber which is competitive with the rate of oxidation at the fiber's surface. Further, the present invention provides a high density pitch fiber batt which thermosets without loss of fiber structure.Type: ApplicationFiled: March 24, 2003Publication date: September 25, 2003Applicant: ConocoPhillips CompanyInventors: Andrea K. Zimmerman, John A. Rodgers, H. Ernest Romine, James R. McConaghy, Lorita Davis
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Patent number: 6582588Abstract: 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 diffusion rate to the center of the fiber which is competitive with the rate of oxidation at the fiber's surface. Further, the present invention provides a high density pitch fiber batt which thermosets without loss of fiber structure.Type: GrantFiled: February 28, 2000Date of Patent: June 24, 2003Assignee: ConocoPhillips CompanyInventors: Andrea K. Zimmerman, John A. Rodgers, H. Ernest Romine, James R. McConaghy, Lorita Davis
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Patent number: 6325986Abstract: 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-blowing process are bubbled through a liquid seal in a knockout tank before going to an incinerator and finally being emitted to the atmosphere. The knockout tank normally operates to condense oil in the fume stream, and the liquid seal is composed of this oil, as well as some of the water evolved in the air-blowing process. When using ferric chloride or ferrous chloride as a catalyst in the air-blowing process, the fume stream contains significant levels of hydrogen chloride.Type: GrantFiled: September 21, 2000Date of Patent: December 4, 2001Assignee: Owens Corning Fiberglas Technology, Inc.Inventors: Jorge A. Marzari, Katherine E. Poterek, Timothy T. Picman
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Patent number: 6036843Abstract: 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 produces hydrogen chloride emissions. The addition of the chemical modifier reduces the hydrogen chloride emissions by at least 25% compared to the same process without the addition of the chemical modifier. The addition of the ferric chloride and/or ferrous chloride provides beneficial effects such as increased blowing rate and increased final penetration of the asphalt. Preferably, the addition of the chemical modifier does not significantly reduce these beneficial effects.Type: GrantFiled: December 30, 1998Date of Patent: March 14, 2000Assignee: Owens Corning Fiberglas Technology, Inc.Inventors: Jorge Alberto Marzari, Katherine Elizabeth Poterek, David Charles Trumbore, Michael Richard Franzen, Herman P. Benecke, Timothy Thomas Picman
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Patent number: 5470455Abstract: 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 into soft, un-oxidized asphalt. The process comprises contacting the entire surface area of acid sludge with a pH altering agent such as water or a solid base such as lime, caustic soda, or soda ash, to convert the acid sludge into a layer of liquid and a layer of intermediate sludge. Then the liquid layer is separated from the intermediate sludge layer, thereby producing an intermediate sludge having properties which make it suitable for use in asphalt production. To produce soft, un-oxidized asphalt, the intermediate sludge is heated to a temperature above the boiling point of water and held at that temperature long enough to remove all the aqueous components to create un-oxidized asphalt.Type: GrantFiled: February 17, 1994Date of Patent: November 28, 1995Inventor: Benjamin S. Santos
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Patent number: 5387333Abstract: 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 material for producing carbon fibers or activated fibers.Type: GrantFiled: March 25, 1992Date of Patent: February 7, 1995Assignee: Petoca Ltd.Inventor: Toshio Tamaki
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Patent number: 5306415Abstract: 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 oxygen-containing atmosphere, deformation, pyrolysis, and/or composite formation) performed after or in conjunction with the oxygenation process. Moreover, the invention includes the composition of matter (in any of a number of different physical forms such as powder, fiber, shaped article, composites) resulting from the practice of this oxygenation process, either alone or in conjunction with the further processing steps. The composition has a homogeneous distribution of oxygen and can be heat stabilized in an inert atmosphere.Type: GrantFiled: April 16, 1993Date of Patent: April 26, 1994Assignee: Clemson UniversityInventors: Ludovic P. Cornec, Charles C. Fain
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Patent number: 5225070Abstract: 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 oxygen-containing atmosphere, deformation, pyrolysis, and/or composite formation) performed after or in conjunction with the oxygenation process. Moreover, the invention includes the composition of matter (in any of a number of different physical forms such as powder, fiber, shaped article, composites) resulting from the practice of this oxygenation process, either alone or in conjunction with the further processing steps. The composition has a homogeneous distribution of oxygen and can be heat stabilized in an inert atmosphere.Type: GrantFiled: July 29, 1991Date of Patent: July 6, 1993Assignee: Clemson UniversityInventors: Ludovic P. Cornec, Charles C. Fain
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Patent number: 5059300Abstract: 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 bottoms; and(c) a bituminous material to make up 100 percent by weight, said bituminous material comprising vacuum distilled asphalt.Type: GrantFiled: September 19, 1988Date of Patent: October 22, 1991Assignee: Chevron Research and Technology CompanyInventor: Edgar L. McGinnis
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Patent number: 4975176Abstract: 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.degree. and 250.degree., preferably 200.degree. C., by turbodispersion of the gaseous phase in the bituminous mass by means of a rapid turbodisperser.By adding appropriate fluxes and operating in the presence of catalysts, the technological characteristics of the end product can be varied until obtaining blends of bitumens that are adapted for new applications.The turbodisperser is provided with an impeller constituted by a plane disk carrying on its periphery a series of teeth made preferably with the active side located on the diameter of the impeller and the angle at the vertex greater than 45.degree..Type: GrantFiled: July 1, 1987Date of Patent: December 4, 1990Inventors: Fernando Begliardi, Alessandro Cori
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Patent number: 4971679Abstract: 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 bimodel. The plasticizer is formed by reacting a tar or distillate precursor with oxygen under controlled conditions of temperature and time.Type: GrantFiled: October 10, 1989Date of Patent: November 20, 1990Assignee: Union Carbide CorporationInventors: Irwin C. Lewis, Terrence A. Pirro
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Patent number: 4904371Abstract: 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 reactive sparging gas such as a mixture of oxygen and nitrogen through the feedstock. The oxidatively treated feedstock is then subjected to a heat soak, for a longer period of time in the absence of a sparging gas. Thereafter the heat soaked feedstock is heated at an elevated temperature in the presence of a non-oxidative sparging gas for a time period equal to or less than the heat soak to produce an anisotropic pitch having from 50 to 100% by volume mesophase which is suitable for producing good quality carbon fibers.Type: GrantFiled: October 13, 1988Date of Patent: February 27, 1990Assignee: Conoco Inc.Inventor: Walter M. Kalback
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Patent number: 4892642Abstract: 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 as air through the feedstock. The oxidatively treated feedstock, which contains isotropic pitch, is solvent fractionated to recover a solid pitch which on fusion becomes an anisotropic pitch product having from 50 to 100 percent by volume mesophase. In one aspect of the invention the carbonaceous feedstock is oxidatively treated in a melt phase at a lower temperature and the resulting isotropic pitch is then heated at a higher temperature in a melt phase in the presence or absence of a non-oxidative sparging gas prior to solvent fractionation.Type: GrantFiled: January 17, 1989Date of Patent: January 9, 1990Assignee: Conoco Inc.Inventors: Hugh E. Romine, Ta-Wei Fu
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Patent number: 4892641Abstract: 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 as air through the feedstock. The oxidatively treated feedstock, which remains substantially free of mesophase pitch, is then heated at a higher temperature in the presence of a non-oxidative sparging gas to produce an anisotropic pitch having from 50 to 100% by volume mesophase which is suitable for producing good quality carbon fibers.Type: GrantFiled: February 8, 1989Date of Patent: January 9, 1990Assignee: Conoco Inc.Inventors: Ta-Wei Fu, Manfred Katz
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Patent number: 4664774Abstract: 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 may be advantageously applied to the impregnation of carbon electrodes. The oxidized selected coal tar based low solids material described is characterized by high carbon yield and higher product density and has a higher in situ coking value and lower sulfur content which make it particularly beneficial when it is used as an impregnating pitch as compared to the currently commercially used petroleum based pitch.Type: GrantFiled: February 20, 1985Date of Patent: May 12, 1987Assignee: Allied CorporationInventors: Arthur S. Chu, Edward F. Bart, George R. Cook, David M. Horbachewski
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Patent number: 4474617Abstract: 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.Type: GrantFiled: February 9, 1983Date of Patent: October 2, 1984Assignee: Nippon Oil Company, LimitedInventors: Seiichi Uemura, Shunichi Yamamoto, Takao Hirose, Hiroaki Takashima, Osamu Kato
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Patent number: 4456524Abstract: Sodium carbonate, sodium sesquicarbonate and other carbonate catalysts ground to fine particle sizes (95% plus passing through a 200 mesh sieve (75 .mu.m) are more active than commercially available grades of such catalysts when oxidizing asphalt fluxes, permitting reduction in oxidation time, reduction in required catalyst quantities and improvement in product quality.Type: GrantFiled: April 2, 1982Date of Patent: June 26, 1984Assignee: Ashland Oil, Inc.Inventors: Robert H. Wombles, Charles R. Gannon, Donald D. Carlos
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Patent number: 4456523Abstract: 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 preparing novel high quality paving grade asphalt cements and novel roofing grade asphalts from poor and marginal quality bituminous materials. Also, the process can be used to prepare novel superior quality asphaltic materials from good quality bituminous flux feedstocks. This process consists of catalytically oxidizing asphalt fluxes, for example, in a single or multi-stage oxidation, using the particular type of catalyst disclosed hereinafter in each stage to chemically modify the flux so that the resultant asphaltic material meets physical requirements necessary for a finished product possessing good temperature susceptibility characteristics.Type: GrantFiled: November 12, 1981Date of Patent: June 26, 1984Assignee: Ashland Oil, Inc.Inventors: Donald D. Carlos, Charles R. Gannon, Robert H. Wombles
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Patent number: 4424107Abstract: Liquid hydrocarbons are oxidized in the presence of an organic surfactant promoter.Type: GrantFiled: April 20, 1981Date of Patent: January 3, 1984Assignee: Ashland Oil, Inc.Inventor: Donald D. Carlos
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Patent number: 4177132Abstract: A process for the continuous production of petroleum-derived pitch comprising the steps of subjecting a heavy fraction boiling at not lower than 150.degree. C., the heavy fraction being obtained by the steam cracking of petroleum-derived hydrocarbons, to a specified first-step heat treatment, subjecting the first-step treated fraction to a specified second-step heat treatment and then removing the light fraction from the second-step treated fraction thereby to obtain the petroleum-derived pitch.Type: GrantFiled: November 8, 1977Date of Patent: December 4, 1979Assignee: Nippon Oil Company, Ltd.Inventors: Seiichi Uemura, Syunichi Yamamoto, Takao Hirose, Hiroaki Takashima, Osamu Kato, Minoru Nagi
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Patent number: 4176043Abstract: 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 dehydrogenating agent, in particular an oxygen-containing gas.Type: GrantFiled: June 20, 1977Date of Patent: November 27, 1979Assignee: Cindu Chemie B.V.Inventor: Johannes N. van Eijk
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Patent number: 4096056Abstract: 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.degree. F to a softening point of from about 30.degree. to about 100.degree. C, and in a second step, the pitch is stripped under controlled conditions in an inert environment to a softening point of between 100.degree.-135.degree. C. This low temperature with controlled stripping permits the formation of an impregnating pitch having a beta resin content of less than about 15% with a low quinoline insolubles content, and a Conradson Carbon of about 50%.Benzene Insolubles, as herein disclosed, are determined by ASTM D-2317; Quinoline Insolubles are determined by ASTM D-2318; Conradson Carbon is determined by ASTM D-189; and Softening Point by ASTM D-3104.Type: GrantFiled: October 21, 1976Date of Patent: June 20, 1978Assignee: Witco Chemical CorporationInventors: Samuel Isa Haywood, John Howard Semon
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Patent number: 4052290Abstract: 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 index higher than about 2.5 .times. 10.sup.5.Type: GrantFiled: July 26, 1976Date of Patent: October 4, 1977Assignee: Mobil Oil CorporationInventors: Donald R. Cushman, Charles A. Pagen, John W. Schick, Tsoung-Yuan Yan
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Patent number: 4039423Abstract: 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 fraction is heat treated under pressure, the treated material is flashed to a lower pressure, and finally the material is oxy-activated under elevated temperature conditions to form a petroleum pitch having the desired properties.Type: GrantFiled: March 10, 1975Date of Patent: August 2, 1977Assignee: Gulf Oil Canada LimitedInventors: Maurice Moyle, Buenaventura B. Galvez, Eric C. Pease, Alan Logan