Investigation of the absorption and polymerization capacity of coal wash oils
The absorption and polymerization capacity of coal gas wash oils is important when they are used as an absorber to recover benzol from coke-oven gas. The absorption capacity characterizes the property of the oil for dissolving benzol at normal temperature and a high benzol concentration in the coke-oven gas and for easily separating the benzol on heating. The polymerization capacity of the oil characterizes its property of forming polymer products, usually dissolving in the oil and intensifying its color, under the influence of temperature. The acceleration of polymerization processing of individual components of the oil is affected by its repeated heating to 130 to 140/sup 0/C during distillation of the benzol. The accumulation of polymer products in the oil impairs its quality: for example, the density increases (to 1.1 g/cm/sup 3/), the molecular weight and viscosity increase and the absorption capacity decreases. Investigations permitted more precise determination of the most characteristic temperature interval for determination and evaluation of the absorption capacity of the oils, determination of the components which largely determine the formation of polymer products in the oil and determination of certain functions for the absorption and polymerization properties of various wash oils. The principal specifications were determined for oil with sufficient absorption capacity and low polymerization capacity: density at 20/sup 0/C of not over 1.047 g/cm/sup 3/, not less than 95% distillation in the 230 to 280/sup 0/C range, concentration, wt %: naphthalene not over 10%, monomethylnaphthalenes not less than 25%, high-boiling compounds (acenaphthene, diphenylene oxide and fluorene) not over 25%; no precipitation at 5/sup 0/C. Oil of this quality may be obtained by additional purification of the standard industrial coal wash oil.
- OSTI ID:
- 6476562
- Journal Information:
- Coke Chem. USSR (Engl. Transl.); (United States), Journal Name: Coke Chem. USSR (Engl. Transl.); (United States) Vol. 10; ISSN COKCA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
010500* -- Coal
Lignite
& Peat-- Products & By-Products
AROMATICS
BENZENE
CHEMICAL REACTIONS
COAL GAS
COAL TAR
COAL TAR OILS
EQUIPMENT
FLUIDS
GASES
HYDROCARBONS
OILS
ORGANIC COMPOUNDS
OTHER ORGANIC COMPOUNDS
POLLUTION CONTROL EQUIPMENT
POLYMERIZATION
PROCESSING
PURIFICATION
RECOVERY
SCRUBBERS
SPECIFICATIONS
TAR