C - Chemistry – Metallurgy – 10 – G
Patent
C - Chemistry, Metallurgy
10
G
196/12, 196/5.9
C10G 1/00 (2006.01) C10G 1/04 (2006.01) C10G 1/06 (2006.01)
Patent
CA 1148491
ABSTRACT OF THE DISCLOSURE DONOR SOLVENT COAL LIQUEFACTION WITH BOTTOMS RECYCLE AT ELEVATED PRESSURE An improved process for liquefying solid carbonaceous materials wherein increased naphtha yields are achieved by effecting the liquefaction at a pressure within the range from about 1750 to about 2800 psig in the presence of recycled bottoms and a hydrogen-donor solvent containing at least 0.8 wt % donatable hydrogen. The liquefaction is accomplished at a temperature within the range from about 700 to about 950°F. The coal:bottoms ratio in the feed to liquefaction will be within the range from about 1:1 to about 5:1 and the solvent or diluent to total solids ratio will be at least 1.5:1 and preferably within the range from about 1.6:1 to about 3:1. The yield of naphtha boiling range materials increases as the pressure increases but generally reaches a maximum at a pressure within the range from about 2000 to about 2500 psig.
369631
Anderson George H.
Bauman Richard F.
Hsia Stephen J.
Taunton John W.
Trachte Kenneth L.
Borden Ladner Gervais Llp
Exxon Research And Engineering Company
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