| 摘要 |
A process of producing a solvent useful in coal liquefaction which includes separating the heavy liquid produced from the liquefaction of coal into a fraction boiling at 200 DEG to 210 DEG C., a fraction boiling at 211 DEG to 230 DEG C., and a fraction boiling at not less than 231 DEG subjecting the fraction boiling at 211 DEG to 230 DEG C. to a hydrogenation treatment to produce a hydrogenated fraction, mixing the hydrogenated fraction with the fraction boiling at 200 DEG to 210 DEG C. to form a resultant mixture, and mixing a portion of the resultant mixture with a portion of the fraction boiling at not less than 231 DEG C. Alternately, the solvent is produced from the heavy liquid by separating it into a fraction boiling at 200 DEG C. to 210 DEG C., a fraction boiling at 211 DEG C. to 230 DEG C., a fraction boiling at 231 DEG C. to 250 DEG C., a fraction boiling at 251 DEG C. to 350 DEG C. and a fraction boiling at not less than 351 DEG C., subjecting each of the middle three fractions to a hydrogenation treatment to form three hydrogenated fractions, mixing the three hydrogenated fractions with the fraction boiling at 200 DEG C. to 210 DEG C. to form a resultant mixture, and mixing the resultant mixture with a portion of the fraction boiling at not less than 351 DEG C. |
