Patent · US Expired

Coal liquefaction process

US4377464A · kind A · utility

3Cited by
16References
10Claims
0Family size

Assignee

Inventors

Key dates

Filing dateSep 3, 1981
Grant dateMar 22, 1983
Priority date
Expiry dateSep 3, 2001

Classification

  • Technology area (CPC C)Chemistry; Metallurgy
  • CPC primaryC10G1/083
  • WIPO fieldBasic materials chemistry
  • WIPO sectorChemistry

Abstract

A C.sub.5 -900.degree. F. (C.sub.5 -482.degree. C.) liquid yield greater than 50 weight percent MAF feed coal is obtained in a coal liquefaction process wherein a selected combination of higher hydrogen partial pressure, longer slurry residence time and increased recycle ash content of the feed slurry are controlled within defined ranges.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.