Patent · US Expired

Liquefaction process

US4485008A · kind A · utility

37Cited by

15References

10Claims

0Family size

Assignee

Exxon Research and Engineering Company · US

Inventors

Peter S. Maa · Baton Rouge, US
Lavanga R. Veluswamy · Houston, US
Lonnie W. Vernon · Baytown, US

Key dates

Filing date	Apr 7, 1983
Grant date	Nov 27, 1984
Priority date	—
Expiry date	Apr 7, 2003

Classification

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

Abstract

An improved liquefaction process for solid carbonaceous materials wherein at least a portion of the liquefaction is accomplished in the presence of an added hydrogenation catalyst and a solvent containing at least 1.25 wt % donatable hydrogen and in the presence of partially liquefied, solid carbonaceous material at liquefaction conditions. In a preferred embodiment, the liquefaction is accomplished in a plurality of stages and a solvent containing at least 1.25 wt % donatable hydrogen is used in at least one stage, most preferably in the second stage. The partially liquefied solid carbonaceous material may be taken from the bottoms fraction of the effluent from any of the liquefaction stages.

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