Impregnation pitch with improved filterability and process for i

Details Impregnation pitch with improved filterability and process for i Impregnation pitch with improved filterability and process for i

1988-03-18

1991-03-05

Myers, Helane

Mineral oils: processes and products

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

208 22, 208 44, 208 41, 208 42, C10G 900, C10G 1100

Patent

active

049975420

ABSTRACT:
An impregnation pitch having a Kraemer-Sarnow softening point ranging from about 60.degree. C. to 80.degree. C., a content of quinoline-insoluble substances less than or equal to 7% by weight, and a filterability index greater than or equal to 4.5. A process for the manufacture thereof, wherein a tar or a pitch having a Kraemer-Sarnow softening point not exceeding 60.degree. C. and a content of quinoline-insoluble substances below or equal to 7% by weight is subjected to a thermal treatment capable of removing constituents with a molecular mass of below 1,200.

REFERENCES:
patent: 3692663 (1972-09-01), Ueda et al.
patent: 3835024 (1974-09-01), Ueda et al.
patent: 3970542 (1976-07-01), Bongertman
patent: 4096056 (1978-06-01), Haywood et al.
patent: 4176043 (1979-11-01), van Eijk
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patent: 4460557 (1984-07-01), Takashima et al.
patent: 4664774 (1987-05-01), Chu et al.
Clarke, J. W. and Rantell, T. D., "Filtration in Coal Liquefication. Influence of Filtration Conditions in Non-Hydrogenated Systems," 59, Fuel, 35-41 (1980).
ASTM Standard D-2318-86, Standard Test Method for Quinoline-Insoluble (QI) Content of Tar and Pitch.

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