Binder pitch for an electrode and process for its manufacture

Details Binder pitch for an electrode and process for its manufacture Binder pitch for an electrode and process for its manufacture

1991-01-16

1992-06-09

Myers, Helane

Mineral oils: processes and products

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

208 22, 208 40, 208 44, 208 41, 208 42, C10C 300

Patent

active

051204240

ABSTRACT:
The disclosed bonding pitch for electrodes, having a softening point C.I.A. comprised between 80.degree. C. and 150.degree. C., a concentration of quinoline-insoluble substances higher or equal to 4% by weight, a concentration of .alpha.+.beta. resins comprised between 28 and 40% by weight, and a fixed carbon content determined according to the standard ISO 6998, at least equal to 51% by weight, is characterized by a vitreous transition domain .DELTA.Tg, determined by differential calorimetric analysis, at the most equal to 50.degree. C. In order to produce such a pitch, a pitch having a content of quinoline-insoluble substances lower than 4% by weight is subjected to a treatment by waves having a frequency between 0.9 and 300 GHz. Such treatment makes possible the increase of the carbon content of the pitch while preserving a good affinity to the coke and significantly decreasing its vitreous transitional domain.

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