System and a process for obtaining high purity phenanthrene from phenanthrene enriched coal tar fraction

A system for obtaining about 95% pure phenanthrene from coal tar distilled fraction, said system comprising of:

• a) a feed pump (1) through which the fraction containing crude phenanthrene is delivered to pre-heater (2),
• b) sending the material from pre-heater (2) of step (a) to a kettle-type re-boiler (3) and obtaining a super-heated vapor,
• c) sending the super heated vapor of step (b) to distillation column (5) and then to a condenser (6) to obtain a distilled product,
• d) collecting the distilled product of step (c) containing pure phenanthrene into a hot catch pot (7) and the overflow from hot catch pot is sent to a receiver (8) using a vacuum pump (11),
• e) discharging a residue containing heavy products from kettle-type boiler (3) into a receiving means (13);
• f) obtaining first cut out distillate and a second cut out distillate fractions in (10) and (9) respectively from the receiver (8) based on temperature variations, and
• g) re-distilling the second cut-out distillate fraction (9) of step (f), by sending it to kettle type re-boiler (3) and repeating steps (c) and (d) and then discharging the pure phenanthrene into the receiving means (14).