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- [2] EXTRACTION OF TAR ACIDS WITH AQUEOUS AMMONIA .I. STUDY OF PROCESS VARIABLES INDIAN JOURNAL OF TECHNOLOGY, 1965, 3 (03): : 93 - &
- [3] EXTRACTION OF TAR ACIDS FROM TAR OILS BY AQUEOOUS ACETAMIDE JOURNAL OF APPLIED CHEMISTRY, 1967, 17 (04): : 113 - +
- [4] SOLVENT EXTRACTION OF TAR ACIDS FROM COAL TAR HYDROCARBONS INDUSTRIAL AND ENGINEERING CHEMISTRY, 1950, 42 (06): : 1210 - 1217
- [5] EXTRACTION OF TAR ACIDS WITH AQUEOUS AMMONIA .2. STATISTICAL ANALYSIS OF PROCESS VARIABLES INDIAN JOURNAL OF TECHNOLOGY, 1967, 5 (07): : 222 - &
- [7] EXTRACTION OF TAR ACIDS FROM LOW-TEMPERATURE TAR OILS BY ACETIC ACID JOURNAL OF APPLIED CHEMISTRY, 1965, 15 (11): : 505 - +
- [10] A NEW TAR SAND RECOVERY PROCESS - RECOVERY METHODS AND CHARACTERIZATION OF PRODUCTS ENERGY SOURCES, 1990, 12 (02): : 147 - 160