Certain problems of the extraction and refining of heavy pyridine bases (a survey)
Crude heavy pyridine bases (CHPB) are extracted in the purification of various coal tar fractions at coking plants. Quinoline, the principal component of CHPB, is obtained as a byproduct. The extraction and refining of quinoline is a complex process, including the following stages: extraction of the bases with dilute sulfuric acid; sedimentation and separation of the layers; purification of the sulfate solution; neutralization of the sulfates to separate the CHPB; preparation of the bases for rectification; preliminary rectification of the CHPB with collection of the fractions; and rerectification of the quinoline fraction to produce quinoline. This paper examines the best results obtained at each stage of the process at different coking plants to optimize the entire process. 43 references.
- OSTI ID:
- 6726960
- 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
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Related Subjects
010500* -- Coal
Lignite
& Peat-- Products & By-Products
AROMATICS
ASIA
AZAARENES
AZINES
BY-PRODUCTS
COAL TAR
COKING PLANTS
CONSTRAINTS
EASTERN EUROPE
EUROPE
EXTRACTION
HETEROCYCLIC COMPOUNDS
HYDROGEN COMPOUNDS
INDUSTRIAL PLANTS
INORGANIC ACIDS
OPTIMIZATION
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
OTHER ORGANIC COMPOUNDS
PROCESSING
PRODUCTION
PURIFICATION
PYRIDINES
QUINOLINES
REFINING
SEPARATION PROCESSES
SULFURIC ACID
TAR
TECHNOLOGY ASSESSMENT
USSR