DONOR SOLVENT COAL LIQUEFACTION WITH BOTTOMS RECYCLE AT ELEVATED PRESSURE

A 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...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	TAUNTON, JOHN WILLIAM, HSIA, STEPHEN JU-MING, TRACHTE, KENNETH LEE, BAUMAN, RICHARD FRANK, ANDERSON, GEORGE HUGO
Format:	Patent
Sprache:	eng
Schlagworte:	CHEMISTRY CRACKING HYDROCARBON OILS FUELS LUBRICANTS METALLURGY MINERAL WAXES PEAT PETROLEUM, GAS OR COKE INDUSTRIES PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVEHYDROGENATION, OLIGOMERISATION, POLYMERISATION RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, ORGASES REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS REFORMING OF NAPHTHA TECHNICAL GASES CONTAINING CARBON MONOXIDE
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Beschreibung
Zusammenfassung:	A 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 950 DEG F. The coal:bottoms ratio in the feed to liquefaction is within the range of from about 1:1 to about 5:1 and the solvent or diluent to total solids ratio is at least 1.5:1 and preferably within the range of 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 2500 psig.