Effect of the pyridine bases in crude benzol on the process of its refining and the quality of the pure products

Journal Article · Sat Jan 01 00:00:00 UTC 1983 · Coke Chem. USSR (Engl. Transl.); (United States)

OSTI ID:6744289

Chaiskii, V Ya; Emel'yanova, L P; Titushkin, V A

Pyridine and its homologs are effective inhibitors of the copolymerization (alkylation) of thiophene and unsaturated crude benzol compounds, caused by the effect of concentrated sulfuric acid. At the same time, operating experience at the rectification divisions of coking plants has shown that variations in the concentration of pyridine bases in the crude benzol from 0.1 to 0.3% at the existing sulfuric acid dosage rates have practically no significant effect on the process of sulfuric acid purification of the benzene hydrocarbons and the quality of the final products. On conversion to the new technology of extraction of the ammonia from the coke oven gas the concentration of the bases in the crude benzol increases significantly, thus it was of practical interest to study their effect on the process of sulfuric acid purification, and also to develop recommendations for refining of the crude benzol, with a high concentration of bases. It was concluded that high concentration of pyridine bases in the crude benzol has a negative effect on the purification process, increasing the sulfuric acid consumption and decreasing the quality of the benzol. At a concentration of bases in the crude benzol over 0.4% preliminary pyridine removal is necessary, which makes it possible to decrease the dosage of reagents and efficiently utilize the light pyridine bases, which are in short supply. 7 references, 3 tables.

• DOE Contract Number: NONE
• OSTI ID: 6744289
• 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
ALKYLATED AROMATICS
AMMONIA
AROMATICS
AZINES
BENZENE
BY-PRODUCTS
CATALYTIC EFFECTS
COKING PLANTS
EXTRACTION
HETEROCYCLIC COMPOUNDS
HYDRIDES
HYDROCARBONS
HYDROGEN COMPOUNDS
HYDROXY COMPOUNDS
INDUSTRIAL PLANTS
INORGANIC ACIDS
NITROGEN COMPOUNDS
NITROGEN HYDRIDES
OPTIMIZATION
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
ORGANIC SULFUR COMPOUNDS
PHENOLS
PICOLINES
PROCESSING
PURIFICATION
PYRIDINES
QUANTITY RATIO
RECOMMENDATIONS
RECOVERY
REFINING
REMOVAL
SEPARATION PROCESSES
SULFURIC ACID
THIOPHENE
TOLUENE
XYLENES