Method of producing an impregnating petroleum pitch

Details Method of producing an impregnating petroleum pitch Method of producing an impregnating petroleum pitch

1976-10-21

1978-06-20

O'Keefe, Veronica

Mineral oils: processes and products

Oxidation of mineral oils

To form asphalts, tars or pitches

208 22, 208 39, 208 44, 208 6, C10C 304

Patent

active

040960560

ABSTRACT:
A method for producing an impregnating petroleum pitch in two steps. In the first step, aromatic oils undergo polymerization with a controlled feed of an oxygen-containing gas at a temperature of less than 700.degree. F to a softening point of from about 30.degree. to about 100.degree. C, and in a second step, the pitch is stripped under controlled conditions in an inert environment to a softening point of between 100.degree.-135.degree. C. This low temperature with controlled stripping permits the formation of an impregnating pitch having a beta resin content of less than about 15% with a low quinoline insolubles content, and a Conradson Carbon of about 50%.
Benzene Insolubles, as herein disclosed, are determined by ASTM D-2317; Quinoline Insolubles are determined by ASTM D-2318; Conradson Carbon is determined by ASTM D-189; and Softening Point by ASTM D-3104.

REFERENCES:
patent: 2762756 (1956-09-01), Kinnaird
patent: 2991241 (1961-07-01), Renner
patent: 3317622 (1967-05-01), Hoertz, Jr. et al.
patent: 3350295 (1967-10-01), Hamner et al.
patent: 3725240 (1973-04-01), Baum
patent: 3856657 (1974-12-01), Seinfeld
patent: 4013540 (1977-03-01), Moyle et al.

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