PURPOSE: To stop the operation of a pervaporation membrane separator especially for a short period of time by relatively simple operation in order to prevent the swelling of a separation membrane.
CONSTITUTION: In a pervaporation membrane separator, a membrane module having the function of cooling the liquid coming into contact with a membrane at the time of the stop of operation, pref. constituted so that a cooling jacket cooling the liquid coming into contact with the membrane is formed to the periphery of a module can body is installed and, further, function passing a cooling medium through the cooling jacket at the time of the stop of operation to cool the liquid coming into contact with the membrane is formed. A method for stopping the operation of the pervaporation membrane separator is characterized by that the liquid coming into contact with the membrane is cooled without extracting the raw soln. on the supply side of the pervaporation membrane module at the time of the stop of operation and the vacuum degree on the transmission side of the pervaporation membrane module is kept and a supply soln. is heated while the vacuum degree on the transmission side is kept at the time of the resumption of operation.
SUGIMOTO KENJI
KUDO MORIYOSHI
TANAKA YUJI
MITSUBISHI KASEI ENG