Title (en)

Process for producing an optically anisotropic carbonaceous pitch.

Title (de)

Verfahren zur Herstellung von optisch-anisotropem Pech.

Title (fr)

Procédé de préparation de brai ayant une anisotropie optique.

Publication

EP 0089840 A1 19830928 (EN)

Application

EP 83301552 A 19830321

Priority

JP 4790382 A 19820324

Abstract (en)

A process for producing an optically anisotropic carbonaceous pitch comprises (a) heat treating a starting material which preferably comprises a carbonaceous heavy oil, at conditions which will favour the formation of an anisotropic pitch phase; (b) stopping said heat treating at an early stage in said formation; (c) maintaining the thus partially treated material at a temperature in the range 200 to 400 DEG C; (d) subjecting the material from step (c) to a settling treatment, while maintaining the material in a molten state; (e) removing the anisotropic pitch phase which separates in step (d); and (f) su;bjecting at least a portiion of the remaining material to an after-treatment including a heat treatment for forming and/or concentrating an anisotropic pitch phase therein. A preferred step (b) comprises stopping the heat treatment when a pitch is obtained having a globular optically anisotropic phase content of 5-50 wt.%, a quinoline-insoluble matter content of 2-20 wt.%, a quinoline-insoluble/benzene-soluble matter content of 5-40 wt.% and a softening point of the formed pitch as a whole of up to 200 DEG C.

IPC 1-7

C10C 3/00

IPC 8 full level

C10C 3/00 (2006.01); C10C 3/02 (2006.01); D01F 9/145 (2006.01); D01F 9/15 (2006.01); D01F 9/155 (2006.01)

CPC (source: EP)

C10C 3/002 (2013.01); D01F 9/15 (2013.01); D01F 9/155 (2013.01)

Citation (search report)

• [XD] EP 0044714 A2 19820127 - TOA NENRYO KOGYO KK [JP]
• [E] GB 2086932 A 19820519 - KOA OIL CO LTD
• [A] FR 2424954 A1 19791130 - EXXON RESEARCH ENGINEERING CO [US]
• [ED] EP 0055024 A2 19820630 - TOA NENRYO KOGYO KK [JP]
• [ED] EP 0057108 A2 19820804 - TOA NENRYO KOGYO KK [JP]

Designated contracting state (EPC)

BE DE FR GB IT NL

DOCDB simple family (publication)

EP 0089840 A1 19830928; EP 0089840 B1 19891129; AU 1275583 A 19830929; AU 565830 B2 19871001; CA 1196596 A 19851112; DE 3380898 D1 19900104; JP S58164687 A 19830929

DOCDB simple family (application)

EP 83301552 A 19830321; AU 1275583 A 19830323; CA 423409 A 19830311; DE 3380898 T 19830321; JP 4790382 A 19820324