An experiment on improving tar-distillation technology

Journal Article · Sun Jan 01 04:00:00 EST 1984 · Coke Chem. USSR (Engl. Transl.); (United States)

OSTI ID:6507872

Zharkova, N A; Kurkin, V V; Muzychuk, V D; Taskina, M F; Vasyuchkov, E I

The naphthalene recovery coefficient in the distillation stages amounted to 71% at that time (88% was projected) when the naphthalene content in the naphthalene fraction was low (79.1%). The quality of the absorbent fraction varied greatly. After inspecting the precipitate, a number of projects were undertaken with a view to improving the distillation process, stabilizing conditions, and increasing the efficiency of the distillation columns. The columns were redesigned. Whereas, earlier, the vapor fractions were sent under the fourth tray after the second-level evaporator (i.e., only 56 of the 59 trays in the rectification process were used), after redesign, vapor delivery was effected under the second tray. This increased the number of trays used in rectification to 58 and ensured that they would work continuously without the introduction of supplementary heat. Isolation of the columns and evaporators of the second level was realized using a slab made from a mixture of MgO, CaCO/sub 3/, and asbestos, which was plastered using an asbestos-cement solution. Complete redesign of the monitoring and measuring instrument with a change of the out-of-date devices for new ones was also realized.

• Research Organization: Karaganda Metallurgical Combine
• OSTI ID: 6507872
• Journal Information: Coke Chem. USSR (Engl. Transl.); (United States), Journal Name: Coke Chem. USSR (Engl. Transl.); (United States) Vol. 1; ISSN COKCA
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010500* -- Coal
Lignite
& Peat-- Products & By-Products
AROMATICS
ASIA
AUTOMATION
CHEMICAL REACTIONS
COAL TAR
CONDENSED AROMATICS
CONTROL
DECOMPOSITION
DESTRUCTIVE DISTILLATION
DISTILLATION
DISTILLATION EQUIPMENT
EASTERN EUROPE
EQUIPMENT
EUROPE
EVAPORATORS
HYDROCARBONS
MEASURING INSTRUMENTS
MODIFICATIONS
MONITORING
NAPHTHALENE
OPTIMIZATION
ORGANIC COMPOUNDS
OTHER ORGANIC COMPOUNDS
PROCESS CONTROL
PROCESSING
RECOMMENDATIONS
RECOVERY
SEPARATION PROCESSES
SUPERHEATERS
TAR
USSR