EP 0089840 B1 19891129 - PROCESS FOR PRODUCING AN OPTICALLY ANISOTROPIC CARBONACEOUS PITCH
Title (en)
PROCESS FOR PRODUCING AN OPTICALLY ANISOTROPIC CARBONACEOUS PITCH
Publication
Application
Priority
JP 4790382 A 19820324
Abstract (en)
[origin: EP0089840A1] 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
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)
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