Patent ID: 7998317
Filing Date: 2011-08-16
Classification: C07C,Y10S

Abstract:
1. A glycerol preparation method used with a glycerol preparation system comprising an industrial grade glycerol molecular distillatory unit for refining industrial grade glycerol of purity over 95%, said industrial grade glycerol molecular distillatory unit ( 500 ) comprising a pre-heater ( 501 ), a molecular still ( 502 ), a cold well ( 503 ), a semi-finished product accommodation tank ( 504 ), a semi-finished product output pump ( 505 ), a by-product accommodation tank ( 506 ), a by-product buffer tank ( 507 ), a by-product output pump ( 508 ), a vacuum buffer tank ( 509 ), an on-line gas-liquid separator ( 510 ), a vacuum pump ( 511 ), a thermal oil circulation pump ( 512 ), a thermal oil heater ( 513 ) and a thermal oil expansion tank ( 514 ), the glycerol preparation method comprising the steps of: adding water to a water chiller ( after the chilled water reaching to a first temperature, starting said thermal oil circulation pump ( after the thermal oil reaching to a second temperature, starting said vacuum pump ( operating a semi-finished product output pump ( continuously operating said thermal oil circulation pump (