Coal tar and hydrocarbon mixture pitch production using a...

Details Coal tar and hydrocarbon mixture pitch production using a... Coal tar and hydrocarbon mixture pitch production using a...

2006-04-25

2006-04-25

Griffin, Walter D. (Department: 1764)

Mineral oils: processes and products

Asphalts, tars, pitches and resins; making, treating and...

By distillation

C208S040000, C208S039000, C208S042000, C208S044000

Reexamination Certificate

active

07033485

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° C. to 160° 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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