GRANULATION TOWER AND METHOD FOR PRODUCING GRANULAR BISPHENOL A

摘要

PROBLEM TO BE SOLVED: To provide a granulation tower capable of stably producing organic particles having uniform particle diameters and a method for producing granular bisphenol A using the same. SOLUTION: A molten liquid fed through a feed line 6 is introduced into the granulation tower to form liquid drops by a nozzle 8 and drops in the granulation tower 1 in the state of keeping a temperature of a melting point or above. A gas cooled by a cooler 3 is fed from an inlet line 9 into the granulation tower 1 to flow upward. Then, the gas comes into counter current contact with bisphenol A to rise while heat exchanging to be discharged from a cooled gas discharge line 7 of the tower top part. This cooled gas is introduced to a circulating blower 2. The gas boosted by the circulating blower 2 is cooled up to a predetermined temperature by a coolant in the cooler 3 for cooling a gas before introduced into the granulation tower 1 again. The hole pitch of nozzle holes 14a of a perforated plate 14 is 10-40d with regard to the hole diameter d. COPYRIGHT: (C)2005,JPO&NCIPI