Low temperature hydrodealkylation of alkylated phenols

Details Low temperature hydrodealkylation of alkylated phenols Low temperature hydrodealkylation of alkylated phenols

1981-11-09

1984-02-14

Lone, Werren B.

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

Organic compounds

Oxygen containing

568799, C07C 3750

Patent

active

044318502

ABSTRACT:
A process for thermal dealkylation of alkylated phenols feedstocks, which comprises reacting a feed mixture containing mono and poly-alkylated phenols and gaseous hydrogen at temperature ranging from about 900.degree. to about 1100.degree. F. at hydrogen partial pressure of 300 to 1600 psig, and space velocity of 0.2 to 3.0 volume feed/hr/volume of reactor to produce a phenol-containing product at increased selectivity and yield of phenol. For feedstream mixtures containing more than about 10 W % phenols, a prior distillation step is preferably used to remove the excessive phenol as product and thus avoid undesired dehydroxylation reactions in the hydrodealkylation step to which the feed phenol concentration is usually about 2-8 W %.

REFERENCES:
patent: 3284513 (1966-11-01), Dedinas et al.
patent: 3284514 (1966-11-01), Dedinas et al.
patent: 4230895 (1980-10-01), Daly

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