Pitch fractionation and high softening point pitch

Details Pitch fractionation and high softening point pitch Pitch fractionation and high softening point pitch

2008-01-15

2008-01-15

Caldarola, Glenn (Department: 1764)

Mineral oils: processes and products

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

By distillation

C208S022000, C208S040000, C208S044000, C208S049000, C208S050000, C208S067000, C208S072000, C208S085000, C208S131000

Reexamination Certificate

active

07318890

ABSTRACT:
A process for fractionating crude pitch by direct contact heating with molten metal is disclosed. The crude pitch, which may contain water, contaminants and/or distillables is heated by direct contact heat exchange with molten metal, preferably maintained as a metal continuous bath, operating at a temperature of 100 to 600° C. The molten metal heating zone is maintained at a temperature and pressure sufficient to vaporize a desired amount of contaminants or volatile material from crude pitch to produce pitch product having a desired softening point. New pitch materials, having a softening point above those achievable by conventional techniques, are also produced.

REFERENCES:
patent: 1527847 (1925-02-01), Duckham et al.
patent: 1672459 (1928-06-01), Jansen
patent: 2005077 (1935-06-01), Dickson
patent: 2276307 (1942-03-01), Houdry
patent: 2768119 (1956-10-01), Nash
patent: 3928170 (1975-12-01), Takahashi et al.
patent: 4012457 (1977-03-01), Bredeson et al.
patent: 4026788 (1977-05-01), McHenry
patent: 4671864 (1987-06-01), Sawran et al.
patent: 5238672 (1993-08-01), Sumner et al.
patent: 5429739 (1995-07-01), Hanks et al.
patent: 5614164 (1997-03-01), Sumner et al.
patent: 5619806 (1997-04-01), Warren
patent: 6110239 (2000-08-01), Malone et al.

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