Naphthalene sublimation in a nitrogen current

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

OSTI ID:5822951

Shved, V S; Bydrin, G I; Pungina, L N; Stepanov, N F

Sublimed naphthalene is currently made at coking plants by the chamber process: naphthalene vapors are directed from the evaporation boxes into sublimation chambers and naphthalene flakes build up on the chamber walls as a result of natural cooling. The process has a low productivity and requires bulky apparatus, while the manual labor content is high. The sublimed products made at chemical plants (anthraquinone, salicylic acid) are produced by a more effective process using a carrier gas. The authors have studied the possibility of intensifying naphthalene sublimation with the aid of a carrier gas. In the laboratory apparatus, the use of a carrier gas to produce sublimed naphthalene increases the specific evaporator output by a factor of 8 to 9 and that of the condenser by almost 1000, compared with the commercial chamber apparatus. The optimum processing conditions correspond to a naphthalene temperature in the evaporator of 140/sup 0/C, a carrier-gas temperature of 140/sup 0/C and a throughput of 13.3 m/sup 3//h per kg of product. Sublimed naphthalene within the GOST 16106-70 specifications can be made from either pressed naphthalene or the naphthalene fraction.

• Research Organization: Kemerovo Coke and Chemical Works, USSR
• OSTI ID: 5822951
• Journal Information: Coke Chem., USSR (Engl. Transl.); (United States), Journal Name: Coke Chem., USSR (Engl. Transl.); (United States) Vol. 8; ISSN COKCA
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010500* -- Coal
Lignite
& Peat-- Products & By-Products
AROMATICS
COAL TAR
CONDENSED AROMATICS
CRYOGENIC FLUIDS
ELEMENTS
EVAPORATION
FLUIDS
HYDROCARBONS
NAPHTHALENE
NITROGEN
NONMETALS
ORGANIC COMPOUNDS
OTHER ORGANIC COMPOUNDS
PHASE TRANSFORMATIONS
PROCESSING
PURIFICATION
SUBLIMATION
TAR