101 |
Low viscosity, high carbon yield pitch product |
US10409658 |
2003-04-07 |
US06827841B2 |
2004-12-07 |
Melvin D. Kiser; David C. Boyer |
A low viscosity, high coking value petroleum tar material having a high coking value as compared to standard petroleum tars and containing at least one biodiesel material dissolved therein, and a method for producing such material, are disclosed. |
102 |
High coking value pitch |
US09467327 |
1999-12-20 |
US06352637B1 |
2002-03-05 |
Patricia K. Doolin; Melvin D. Kiser; Robert H. Wombles |
A high coking value pitch with a relatively low softening point is disclosed. A pitch is distilled or thermally processed to produce an intermediate pitch with an increased coking value and relatively high softening point, then blended with a cutter solvent of a liquid hydrocarbon stream to form a product pitch. The process may be used to increase the coking value of either petroleum or coal tar pitch. Preferably the cutter solvent is methylnaphthalene, or a highly aromatic, low viscosity oil or similar aromatic rich stream having a substantially lower boiling point than the intermediate pitch product. |
103 |
Coal tar pitch blend having low polycyclic aromatic hydrocarbon content
and method of making thereof |
US513329 |
1995-08-10 |
US5746906A |
1998-05-05 |
E. Ronald McHenry; William E. Saver |
A coal tar pitch/petroleum pitch blend is disclosed together with a method of making the same. In accordance with the invention, a crude coal tar material is selected according to specific properties including QI, specific gravity, water and ash content. A petroleum pitch material is also selected according to its softening point, QI, coking value and sulfur content. The coal tar pitch is distilled to a uncharacteristically high softening point which is then mixed with the petroleum pitch to a desired softening end point. The material retains significant QI and coking value characteristics of pure coal tar pitch particularly for use in Soderberg-type anodes for aluminum smelting as well as electric arc furnace electrodes. PAH emissions, and more specifically B(a)P equivalent emissions, are all reduced by approximately 40%. |
104 |
Demetallation - high carbon conversion process, apparatus and asphalt
products |
US594627 |
1996-02-02 |
US5728291A |
1998-03-17 |
Charles B. Miller; Howard F. Moore; David P. Wesley; Robert H. Wombles; Carlton H. Jewitt; Roger E. Hayner; Willian H. Gilkerson, Sr.; Charles R. Gannon |
In this combination process, solvent deasphalting (SDA) concentrates metals in the bottoms product which can be blended to asphalt as a product or for sending to the Calderon or similar process and outputs a high carbon (4+ concarbon) feed which is readily cracked to valuable transportation fuels by an RCC.RTM. cracking unit (or a conventional FCC with catalyst cooler and oxygen to the regenerator so that it acts as an RCC). The Rose process can be used instead of SDA to save utilities. By this invention, heavy crude can be converted to valuable transportation fuels and asphalt product, and catalyst make-up can be sharply reduced in the RCC or FCC unit because metals (asphaltenes and porphyrins) are removed before cracking. Novel asphalt compositions and blending are also disclosed. Asphalt from the SDA can preferably be blended with lube plant extract (or other aromatic extract) to produce specific asphalts meeting new SHRP specifications for paving. |
105 |
Demetallation-High carbon conversion process, apparatus and asphalt
products |
US286714 |
1994-08-04 |
US5601697A |
1997-02-11 |
Charles B. Miller; Howard F. Moore; David P. Wesley; Robert H. Wombles; Carlton H. Jewitt; Roger E. Hayner; Willian H. Gilkerson, Sr.; Charles R. Gannon |
In this combination process, solvent deasphalting (SDA) concentrates metals in the bottoms product which can be blended to asphalt as a product or for sending to the Calderon or similar process and outputs a high carbon (4+ concarbon) feed which is readily cracked to valuable transportation fuels by an RCC.RTM. cracking unit (or a conventional FCC with catalyst cooler and oxygen to the regenerator so that it acts as an RCC). The Rose process can be used instead of SDA to save utilities. By this invention, heavy crude can be converted to valuable transportation fuels and asphalt product, and catalyst make-up can be sharply reduced in the RCC or FCC unit because metals (asphalteries and porphyrins) are removed before cracking. Novel asphalt compositions and blending are also disclosed. Asphalt from the SDA can preferably be blended with lube plant extract (or other aromatic extract) to produce specific asphalts meeting new SHRP specifications for paving. |
106 |
Method for the preparation of pitches for spinning carbon fibers |
US603203 |
1984-04-23 |
US4606808A |
1986-08-19 |
Yasuhiro Yamada; Takeshi Imamura; Masao Shibata; Seiji Arita; Hidemasa Honda |
The invention provides a method for the preparation of a pitch spinnable into pitch filaments as a precursor of carbon fibers starting from a pitch material such as coal tar and coal tar pitch. Different from the conventional procedure involving hydrogenation of the starting pitch, the starting pitch in the inventive method is first heated together with an aromatic oil, preferably, in the presence of a cracking catalyst such as silica-alumina and zeolite at 350.degree. to 500.degree. C. for 10 to 60 minutes under no pressurization with hydrogen and, after removal of insoluble materials, then heated at a temperature of 430.degree. to 600.degree. C. The thus obtained pitch for spinning has good spinnability and the carbon fibers prepared from the pitch have a unique microscopic structure and excellent physical properties exceeding by far the conventional pitch-based carbon fibers and approximating the HP-grade carbon fibers prepared from polyacrylonitrile fibers. |
107 |
Removal of solid contaminants from tar and tar-like products |
US553786 |
1975-02-27 |
US3992281A |
1976-11-16 |
Dirk Christoffel Benade |
A method of separating tar from solid contaminant including the steps of dissolving the tar in a compatible solvent; and separating dissolved tar from solid material. Preferably, contaminated tar is caused to flow in a stream; solvent is introduced into the stream of contaminated tar; the contaminated tar and the solvent are caused to flow together a predetermined distance to permit dissolution of tar; and a diluted tar fraction is separated from a solid contaminant fraction. |
108 |
Process for producing orientation in mesophase pitch by rotational
motion relative to a magnetic field and carbonization of the oriented
mesophase |
US588845 |
1975-06-20 |
US3991170A |
1976-11-09 |
Leonard Sidney Singer |
Mesophase pitches wherein the planes of the mesophase portions of the pitch are substantially aligned in a single parallel direction, and the c-axes of said planes are substantially aligned in a single parallel direction, are produced by subjecting a mesophase pitch in its molten state to rotational motion relative to a surrounding magnetic field about an axis perpendicular to the direction of that field. |
109 |
Asphalt compositions |
US4888570 |
1970-06-15 |
US3810771A |
1974-05-14 |
BEUTHER H; HENKE A |
AN IMPROVED ASPHALT PAVING COMPOSITION IS OBTAINED BY ADDING TO A PETROLEUM ASPHALT COAL WHICH HAS BEEN SOLVENT TREATED IN THE PRESENCE OF HYDROGEN.
|
110 |
Asphalt compositions and process for preparing same |
US31376163 |
1963-10-04 |
US3374104A |
1968-03-19 |
BAUM LESTER A H; LEONARD HENSCHEL |
|
111 |
Petroleum-derived pitch |
US44063765 |
1965-03-17 |
US3330759A |
1967-07-11 |
LEONARD HENSCHEL; BAUM LESTER A H |
|
112 |
Coal tar paving compositions and process for preparing them |
US28214363 |
1963-05-21 |
US3304191A |
1967-02-14 |
BARRETT RICHARD C |
|
113 |
Asphalt blending system |
US33386163 |
1963-12-27 |
US3251508A |
1966-05-17 |
HENRY BORYS |
|
114 |
Asphalts of improved resistance to flow |
US85967859 |
1959-12-15 |
US3093573A |
1963-06-11 |
CORBETT LUKE W |
|
115 |
Cold-laid bituminous paving materials |
US81101059 |
1959-05-05 |
US3074807A |
1963-01-22 |
DORIUS CARL B; JONES GEORGE M; MORSE PARK L |
|
116 |
Alkylated asphalt composition containing lubricating oil and alkylated asphaltenes |
US74464558 |
1958-06-26 |
US2970099A |
1961-01-31 |
ILLMAN JOHN C |
|
117 |
Process for the preparation of age resistant asphalt compositions |
US52833955 |
1955-08-15 |
US2904494A |
1959-09-15 |
GRIFFIN RAYMOND L |
|
118 |
Paving asphalt composition and a process of making it |
US52011355 |
1955-07-05 |
US2877128A |
1959-03-10 |
HARDMAN HARLEY F |
|
119 |
Improved asphalt compositions and method of producing same |
US26218351 |
1951-12-17 |
US2691621A |
1954-10-12 |
GAGLE DUANE W |
|
120 |
Bituminous materials and the method of preparing the same |
US23394651 |
1951-06-27 |
US2658026A |
1953-11-03 |
MACLAREN FREDERICK H; KALINOWSKI MATHEW L |
|