초록 ▼

In a process for recovery of values contained in solid carbonaceous material, the solid carbonaceous material is comminuted and then subjected to pyrolysis, preferably in the presence of a solid particulate source of heat and a transport gas in a transport flash pyrolysis reactor, to form a pyrolysi

In a process for recovery of values contained in solid carbonaceous material, the solid carbonaceous material is comminuted and then subjected to pyrolysis, preferably in the presence of a solid particulate source of heat and a transport gas in a transport flash pyrolysis reactor, to form a pyrolysis product stream. The pyrolysis product stream contains a gaseous mixture and particulate solids. The solids are separated from the gaseous mixture to form a substantially solids-free gaseous stream which comprises volatilized hydrocarbon free radicals newly formed by pyrolysis. Preferably the solid particulate source of heat is formed by oxidizing part of the separated particulate solids. Condensed stabilized hydrocarbons are obtained by quenching the gaseous mixture stream with a quench fluid which contains a capping agent for stabilizing and terminating newly formed volatilized hydrocarbon free radicals. The capping agent is partially depleted of hydrogen by the stabilization and termination reaction. Hydrocarbons of four or more carbon atoms in the gaseous mixture stream are condensed. A liquid stream containing the stabilized liquid product is then treated or separated into various fractions. A liquid containing the hydrogen depleted capping agent is hydrogenated to form a regenerated capping agent. At least a portion of the regenerated capping agent is recycled to the quench zone as the quench fluid. In another embodiment capping agent is produced by the process, separated from the liquid product mixture, and recycled.

대표청구항 ▼

A process for producing condensed stabilized hydrocarbons from a solid particulate carbonaceous material comprising: (a) pyrolyzing a solid particulate carbonaceous feed material under conditions of time and elevated temperature sufficient to produce therefrom a gas-solids mixture which is a pyrolys

A process for producing condensed stabilized hydrocarbons from a solid particulate carbonaceous material comprising: (a) pyrolyzing a solid particulate carbonaceous feed material under conditions of time and elevated temperature sufficient to produce therefrom a gas-solids mixture which is a pyrolysis product comprising particulate product solids and pyrolytic product vapors which comprise hydrocarbons which comprise newly formed volatilized hydrocarbon free radicals, a portion of said hydrocarbons containing larger hydrocarbons, said larger hydrocarbons being all the hydrocarbon vapors in said pyrolytic product vapors containing four or more carbon atoms; (b) separating solids which comprise said particulate product solids from a gaseous mixture which comprises said pyrolytic product vapor to form a substantially solids-free gaseous mixture stream; (c) contacting said substantially solids-free gaseous mixture stream with a quench fluid comprising a capping agent suitable for stabilizing said newly formed volatilized hydrocarbon free radicals, under predetermined conditions of temperature and flow rate of capping agent sufficient for substantially simultaneously stabilizing substantially all of said newly formed volatilized hydrocarbon free radicals by termination, and substantially simultaneously condensing at least a major portion of said larger hydrocarbons, thereby forming a gaseous residue and condensed stabilized hydrocarbons; and (d) separating at least a portion of said condensed stabilized hydrocarbons thusly formed from said gaseous residue.