METHOD OF PITCH PRODUCTION Russian patent published in 2002 - IPC

Abstract RU 2183653 C2

FIELD: chemical and metallurgical industries. SUBSTANCE: method includes treatment of wooden raw materials with phenol-containing solvent in presence of catalytic amounts of organic or inorganic acids with weight ratio of solvent and wooden raw materials from 1 to 2.1 at temperature of 220-250 C during 2.5-5 h. EFFECT: higher yield of pitch. 3 cl, 5 tbl

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RU 2 183 653 C2

Authors

Vershal' V.V.

Stankevich V.K.

Dates

2002-06-20—Published

2000-05-06—Filed