Lignin hydrocracking process to produce phenol and benzene

Details Lignin hydrocracking process to produce phenol and benzene Lignin hydrocracking process to produce phenol and benzene

1981-08-24

1983-12-13

Lone, Werren B.

Organic compounds -- part of the class 532-570 series

Organic compounds

Oxygen containing

568799, C07C 3700

Patent

active

044206445

ABSTRACT:
A lignin-containing feed material in particulate form is mixed with a process-derived slurrying oil and fed into an ebullated catalyst bed hydrocracking reactor. Reaction conditions are maintained at 650.degree.-850.degree. F. temperature, 500-2500 psig hydrogen partial pressure and space velocity of 1.0-10 wt. lignin/hr./wt. catalyst. The reaction products are phase separated to recover hydrogen and slurrying oil, and the resulting liquid stream is passed to a thermal hydrodealkylation step. The reacted stream is fractionated to produce phenol and benzene products, along with a heavy alkylated material which is recycled to the hydrodealkylation step to increase the yield of phenol and benzene.

REFERENCES:
patent: 2328749 (1943-09-01), Sherrard et al.
patent: 2746996 (1956-05-01), Neuworth
patent: 2786873 (1957-03-01), Ohsol et al.
patent: 2947739 (1960-08-01), Gaslini
patent: 2991314 (1961-07-01), Giesen
patent: 2998457 (1961-08-01), Paulsen
patent: 4258221 (1981-03-01), Knudsen et al.

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