Mineral oils: processes and products – By treatment of solid mineral – e.g. – coal liquefaction – etc. – Using specifically added catalyst during hydrogenation
Patent
1986-04-17
1988-05-31
Pal, Asok
Mineral oils: processes and products
By treatment of solid mineral, e.g., coal liquefaction, etc.
Using specifically added catalyst during hydrogenation
208420, 208428, 208430, 208435, 208127, C10G 104
Patent
active
047479388
ABSTRACT:
A coal pyrolysis technique or process is described in which particulate coal is pyrolyzed in the presence of about 5 to 21 wt. % of a calcium compound selected from calcium oxide, calcined (hydrate) dolomite, or calcined calcium hydrate to produce a high quality hydrocarbon liquid and a combustible product gas which are characterized by low sulfur content. The pyrolysis is achieved by heating the coal-calcium compound mixture at a relatively slow rate at a temperature of about 450.degree. to 700.degree. C. over a duration of about 10 to 60 minutes in a fixed or moving bed reactor. The gas exhibits an increased yield in hydrogen and C.sub.1 -C.sub.8 hydrocarbons and a reduction in H.sub.2 S over gas obtainable by pyrolyzing cola without the calcium compound. The liquid product obtained is of a sufficient quality to permit its use directly as a fuel and has a reduced sulfur and oxygen content which inhibits polymerization during storage.
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Hamel Stephen D.
Hightower Judson R.
Larcher Earl L.
Pal Asok
The United States of America as represented by the United States
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