Indole isolation from coal--tar wash--oil fraction

Journal Article · Fri Dec 31 23:00:00 EST 1976 · Coke Chem., USSR (Engl. Transl.); (United States)

OSTI ID:6176446

Kogan, B E; Zaidis, E G

Coal tar contains 0.2 to 0.3% of indole; when the tar is distilled, it concentrates in the wash-oil fraction, which contains 3 to 5% of indole. Indole is an interesting starting point for commerical organic synthesis; one possible large-scale outlet is the production of tryptofan. Laboratory data are presented on the isolation of indole from run-of-plant wash-oil fraction and narrow cuts obtained by rectification. Indole can be isolated directly, without rectification, but the product is less pure than that obtained from narrow cuts, and itself requires rectification. A basic flowsheet is presented for indole production.

• OSTI ID: 6176446
• Journal Information: Coke Chem., USSR (Engl. Transl.); (United States), Journal Name: Coke Chem., USSR (Engl. Transl.); (United States) Vol. 9; ISSN COKCA
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010500* -- Coal
Lignite
& Peat-- Products & By-Products
AZOLES
COAL TAR
DISTILLATION
FRACTIONATION
HETEROCYCLIC COMPOUNDS
INDOLES
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
OTHER ORGANIC COMPOUNDS
PROCESSING
PYRROLES
RECOVERY
SEPARATION PROCESSES
TAR