초록 ▼

In a continuous process for recovery of values from a solid carbonaceous material, the carbonaceous material is pyrolyzed in the presence of a particulate source of heat to yield a particulate carbon containing residue of pyrolysis and volatilized hydrocarbons while simultaneously the volatilized hy

In a continuous process for recovery of values from a solid carbonaceous material, the carbonaceous material is pyrolyzed in the presence of a particulate source of heat to yield a particulate carbon containing residue of pyrolysis and volatilized hydrocarbons while simultaneously the volatilized hydrocarbons are hydrogenated. The particulate source of heat is formed by oxidizing carbon in the solid residue to heat the particles. Hydrogen for hydrogenation is obtained by reacting at least a portion of the hot particulate carbon containing residue of pyrolysis with steam prior to feeding the hot particulate residue to the pyrolysis reaction zone. Steam and/or carbon dioxide can be introduced into the pyrolysis reaction zone to interact with carbon containing residue contained therein. The particulate source of heat can be introduced to the pyrolysis reaction zone over an overflow weir.

대표청구항 ▼

A continuous process for recovery of liquid hydrocarbon values from a particulate coal feed comprising the steps of: (a) oxidizing particulate char resulting from pyrolysis of the particulate coal feed in an oxidation zone in the presence of a source of oxygen to produce hot particulate char and a c

A continuous process for recovery of liquid hydrocarbon values from a particulate coal feed comprising the steps of: (a) oxidizing particulate char resulting from pyrolysis of the particulate coal feed in an oxidation zone in the presence of a source of oxygen to produce hot particulate char and a combustion gas; (b) passing hot particulate and combustion gas from the oxidation zone to a separation zone and separating in the separation zone hot particulate char from the combustion gas; (c) pyrolyzing the particulate coal feed by introducing the particulate coal feed and a particulate source of heat including hot particulate char from the separation zone in a flash pyrolysis reaction zone having a temperature of from about 600°to about 2000°F. and a solids residence time less than 5 seconds to yield a pyrolysis product stream containing particulate char and a vapor mixture comprising volatilized hydrocarbons including middle distillates; (d) introducing into the pyrolysis reaction zone carbon dioxide in an amount of about 0.1 to about 20 SCF per pound of hot particulate char introduced for interaction with char therein for avoiding catalytic cracking of volatilized hydrocarbons; and (e) condensing hydrocarbons including middle distillates from the vapor mixture.