| 摘要 |
PROBLEM TO BE SOLVED: To provide a purification method for an oxidized product solution containing cumene hydroperoxide obtained by oxidizing cumene, wherein the method is characterized by effectively utilizing water for purification, thereby, effectively realizing purification effect with a small amount of water and decreasing the amount of waste water treatment. SOLUTION: This method comprises following steps. Step 1; wherein the oxidized product solution (1) to be purified is mixed with an alkaline aqueous solution (2) and a part (4) of a water layer (3) obtained in the following step 2 and the obtained is separated to an oil layer (5) and a water later (6). Step 2; wherein a part (8) of a water layer (7) obtained in the following step 3 is added to and mixed with the oil layer (5) obtained in the step 1 and then the resultant is separated to an oil layer (9) and the water layer (3). Step 3; wherein water (10) is added to the oil layer (9) obtained in the step 2 and then the resultant is separated to a purified oil layer (11) and the water layer (7). COPYRIGHT: (C)2003,JPO |
