Method for the production of needle coke

Details Method for the production of needle coke Method for the production of needle coke

1980-08-18

1982-06-08

Tufariello, T. M.

Mineral oils: processes and products

Chemical conversion of hydrocarbons

With preliminary treatment of feed

208131, C10G 914

Patent

active

043338160

ABSTRACT:
Coal tar pitch is liquified at temperature of from about 135.degree. C. to 280.degree. C. The liquid coal tar pitch is filtered through a sieve with apertures from about 100 to 220 .mu.m and with a closed surface area of at least 75 percent of the total sieve surface under pressures of from about 2 to 10 bar until a filter cake of a height of from about 40 to 80 mm forms above the sieve for separating ash, soot and quinoline insoluble particles from the liquid. Then the filtrate obtained is subjected to a coking process.
The needle cokes resulting in accordance with the invention provide excellent materials for the production of graphite electrodes.

REFERENCES:
patent: Re25467 (1963-10-01), Logan
patent: 4104150 (1978-08-01), Romey
patent: 4111794 (1978-09-01), Pietzka

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