ORGANIC SOLVENT RECOVERING APPARATUS AND ORGANIC SOLVENT RECOVERING METHOD

摘要

PROBLEM TO BE SOLVED: To reduce the discarding amount of an organic solvent when the organic solvent used in extraction in the analysis of a very small amount of a substance is evaporated for the purpose of concentration and to reduce the running cost due to the recycling of the organic solvent.;SOLUTION: The organic solvent recovering apparatus is equipped with a column 2 packed with an adsorbent, an adsorbing system 3 and a desorbing system 5. The adsorbing system 3 is equipped with first piping 9 for supplying a first gas containing the organic solvent to the column 2 and second piping 10 for discharging a second gas which is formed by passing the first gas through the adsorbent, and the desorbing system 5 is equipped with third piping 19 for supplying a third gas, the temperature of which is higher than that of the first gas, to the column 2, fourth piping 18 for discharging a fourth gas, which is formed by passing the third gas through the adsorbent, to the column 2 and a condenser 14 for removing the organic solvent from the fourth gas by cooling the fourth gas to form the third gas. At this time, the adsorbent charged in the column 2 is repeatedly used for adsorbing and desorbing the organic solvent. By this method, the evaporative discarding amount of the organic solvent can be reduced, the recycling of the organic solvent becomes possible and the amount to be used of the adsorbent can be reduced.;COPYRIGHT: (C)2006,JPO&NCIPI