Coal tar and hydrocarbon mixture pitch production using a high efficiency evaporative distillation process
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May 10, 2005
filing date -
May 11, 2001
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Abstract
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 uses a feed coal tar pitch having a softening point in the range of 70.degree. C. to 160.degree. C. The methods may be carried out using appropriate conventional distillation equipment, a wiped film evaporator, or a thin film evaporator.
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