Disclosed are an adsorption process whereby a fluorocarboxylic acid having an ether bond can be adsorbed to a high extent by using active carbon without changing the form thereof, and a desorption process whereby the adsorbed material can be desorbed from the active carbon to thereby enable the reuse of the active carbon and the adsorbed material. In the aforesaid processes, a solution containing a fluorocarboxylic acid having an ether bond is contacted with active carbon and thus the active carbon is allowed to adsorb the fluorocarboxylic acid, to thereby give a solution having a small fluorocarboxylic acid content. Then, the active carbon having adsorbed the fluorocarboxylic acid is heated to thereby desorbs the fluorocarboxylic acid from the active carbon.
本发明涉及一种吸附过程,通过使用
活性炭可以高度吸附具有醚键的
氟碳
羧酸,而不改变其形式,并且一种解吸过程,通过从
活性炭中解吸被吸附的材料,从而使
活性炭和被吸附的材料可以重新使用。在上述过程中,将含有具有醚键的
氟碳
羧酸的溶液与
活性炭接触,从而允许
活性炭吸附
氟碳
羧酸,从而给出具有小
氟碳
羧酸含量的溶液。然后,加热吸附
氟碳
羧酸的
活性炭,从而从
活性炭中解吸
氟碳
羧酸。