Manufacture of coke
Patent
·
OSTI ID:6502996
A low-impurity coke suitable for the production of electrodes for aluminium manufacture is prepared by extracting coal volatile matter content greater than about 28% by weight on a dry ash free basis with a highly aromatic hydrocarbon extractant of which the middle 90% boils in the range 250/sup 0/ to 350/sup 0/C at a temperature of about 380/sup 0/ to 450/sup 0/C, in the liquid phase, insoluble matter is separated off and the extract is heated to remove distillable oil and coked, wherein the residence time of coal in the extraction step is controlled and the weight ratio of extractant to coal during extraction is maintained greater than 3:1 to maintain a substantially constant specific resistivity of the filter cake.
- Assignee:
- Coal Industry (Patents) Ltd.
- Patent Number(s):
- US 4119525
- OSTI ID:
- 6502996
- Country of Publication:
- United States
- Language:
- English
Similar Records
Manufacture of coke from a coal extract
Process for preparing a raw material for the manufacture of needle coke
Application of heavy oil for metallurgical coke manufacturing on the coking of heavy oil coexisting with coal
Patent
·
Tue Jun 29 00:00:00 EDT 1976
·
OSTI ID:7359831
Process for preparing a raw material for the manufacture of needle coke
Patent
·
Mon Nov 27 23:00:00 EST 1978
·
OSTI ID:6454235
Application of heavy oil for metallurgical coke manufacturing on the coking of heavy oil coexisting with coal
Journal Article
·
Sat Jul 01 00:00:00 EDT 1978
· Energy Dev. Jpn.; (United States)
·
OSTI ID:6813324