Coal tar and hydrocarbon mixture pitch and the preparation and use thereof
AssigneeKoppers Delaware, Inc.
InventorsThomas Golubic, Kenneth Krupinski, William Saver, David Snyder, Robert Wombles
Life of this patent
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Abstract
A method of making a carbon/graphite product using a coal tar pitch having a softening point in the range of about 150° C. to 250° C. Also, a carbon/graphite product having a softening point in the range of about 150° C. to 250° C. A method of making mesophase pitch is formed from quinoline insoluble free coal tar pitch distillate from a high efficiency evaporative distillation process.
Claims30
A method of making a carbon/graphite product comprising:
- providing coal tar pitch having a softening point in the range of about 150° C. to 250° C.;
- providing coke flour;
- mixing the coal tar pitch and coke flour;
- and
- extruding the mixture of coal tar pitch and coke flour.
A carbon/graphite product comprising:
- coal tar pitch having a softening point in the range of about 150° C. to 250° C.;
- and
- coke flour.
A carbon/graphite product including coal tar pitch having a softening point in the range of about 150° C. to 250° C.
A method of making a friction product including adding at least 3 wt. % coal tar pitch having a softening point in the range of about 150° C. to 250° C.
A friction product including at least 3 wt. % coal tar pitch having a softening point in the range of about 150° C. to 250° C.
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A saturated aircraft brake preform coal tar pitch having a softening point in the range of about 160° C.-240° C.
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A method of making a mesophase pitch comprising:
- feeding a coal tar pitch having a softening point in the range of about 70° C. to 160° C. into a processing vessel, wherein the processing vessel is heated to a temperature in the range of about 300° C. to 450° C. and wherein the pressure inside the processing vessel is 5 Torr or less;
- obtaining a distillate from said processing vessel, said distillate having a softening point in the range of about 40° C. to 80° C. and being quinoline insoluble free and ash free;
- heat treating said distillate at a temperature range of 400° C. to 455° C. for between 3 and 8 hours.
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Dependencies are inferred from the claim text.