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Current content: 156 511 693 patent documents

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EP 0097755 B1 19870318 - PROCESS FOR MODIFYING COAL TAR MATERIALS

Title (en)

PROCESS FOR MODIFYING COAL TAR MATERIALS

Publication

EP 0097755 B1 19870318 (EN)

Application

EP 82850147 A 19820629

Priority

EP 82850147 A 19820629

Abstract (en)

[origin: EP0097755A1] The present invention relates to a process for decreasing and modifying the quinoline-insoluble content (Q.I.) of coal-tar materials; and comprises extracting the coal-tar material with a solvent, where the solvent contains at least one of n-methyl-2-pyrrolidone and the wash oil fraction of coal-tar distillate. Pitches with a diminished Q.I. content, lower viscosity and lower average Q.I. particle size, may be prepared from coal-tar materials which have been so treated.

IPC 1-7

C10C 1/18

IPC 8 full level

C10C 1/18 (2006.01)

CPC (source: EP)

C10C 1/18 (2013.01)

Citation (examination)

DE 1189517 B 19650325 - VERKAUFSVEREINIGUNG FUER TEERE

Designated contracting state (EPC)

BE DE FR GB IT NL SE

DOCDB simple family (publication)

EP 0097755 A1 19840111; EP 0097755 B1 19870318; DE 3275737 D1 19870423

DOCDB simple family (application)

EP 82850147 A 19820629; DE 3275737 T 19820629