Title: Petroleum pitch preparation

Abstract: A process having a specified sequence of steps for preparing a petroleum pitch binder suitable for electrodes used in smelting aluminum is disclosed, in which a decant oil petroleum fraction is oxy-activated under specified conditions of temperature, pressure, and time, then heat treated under other specified conditions, and finally distilled under specified conditions to form a petroleum pitch having desired properties.

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Inventors: Moyle, Maurice (Oakville, CA, US)
Galvez, Buenanventura B. (Islington, CA, US)
Pease, Eric C. (Campbellville, CA, US)
Logan, Alan (Oakville, CA, US)

Application Number: 556831
Filing Date: 1975-03-10
Publication_date: 1977-03-22
Assignee: Gulf Oil Canada Limited (Toronto, CA)
Primary Class(es): 208/4 208/5, 208/6
Other Classes:
US Patent Ref:

237662	Feb, 1881	De Smedt	208/4.
2029504	Feb, 1936	Ragatz	208/4.
2046081	Jun, 1936	McNeil	208/4.
3238116	Mar, 1966	Hamner et al.	208/6.
3725240	Apr, 1973	Baum	208/4.
3923633	Dec, 1975	Senolt et al.	208/6.

Other Refs:
Primary Examiner: O'Keefe, Veronica
Assistant Examiner:
Attorney: Morrison; D. R.