Hydro-refining of coal-tar naphthalene

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

OSTI ID:6176462

Shustikov, V I; Privalov, V E; Orlov, M L; Cherkasova, A M; Tyaptina, M I; Koshman, A B

Catalytic hydro-refining is now the most important method of producing refined naphthalene grades. High-purity grades can be produced directly from the naphthalene fraction; feedstocks with increased contents of thionaphthene can be processed effectively with a high naphthalene recovery ratio; air pollution is reduced and the processing facilities can be centralized into large units. These advantages of the hydro-refining process have attracted the attention of numerous investigators. A laboratory study has been made of the effects of temperature, partial hydrogen pressure, and space velocity on the amounts of thionapthen and tetralin in the hydroraffinate made by the catalytic hydro-refining of coal-tar naphthalene. The findings clearly demonstrate that in order to produce high-purity naphthalene under conditions which do not overcomplicate the hydroraffinate rectification stage the hydroraffinate must not contain excessive amounts of tetraline, phenols, and/or bases. This places particular restrictions on the hydro-refining conditions and further demands special feedstock preparation, since the presence of pyridine bases in appreciable amounts causes serious problems at the hydro-refining stage and in particular poisons the catalyst.

• OSTI ID: 6176462
• 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
AROMATICS
CHEMICAL REACTIONS
COAL TAR
CONDENSED AROMATICS
HETEROCYCLIC COMPOUNDS
HYDROCARBONS
HYDROGENATION
HYDROXY COMPOUNDS
NAPHTHALENE
ORGANIC COMPOUNDS
ORGANIC SULFUR COMPOUNDS
OTHER ORGANIC COMPOUNDS
PHENOLS
PROCESSING
REFINING
TAR
TETRALIN
THIONAPHTHENES