Patent ID: 6821394
Filing Date: 2004-11-23
Classification: A01N,A61K,A61P,B01D,Y02E,Y10S

Abstract:
A method for dry distillation of haw pits, comprising:removing impurities from the haw pits; drying the haw pits; soaking the haw pits in water; removing the water and puffing the haw pits in a dry distillation furnace, the haw pits having a temperature; raising the temperature of the haw pits to a first temperature value, the first temperature value being in a 105-195Â° C. range, to obtain a first extract; condensing the first extract to provide a first distillate; raising the temperature of the haw pits to a second temperature value, the second temperature value being in a 305-380Â° C. range, to obtain a second extract; condensing the second extract to provide a second distillate; collecting the first distillate and the second distillate; combining the first distillate and the second distillate; setting aside the combined first distillate and second distillate to separate the combined first distillate and second distillate into liquid layers by means of different specific gravities of the first distillate and the second distillate, thereby providing a brownish red transparent liquid layer; and separating the brownish red transparent liquid layer from the combined first distillate and second distillate.