8 metric ton per hour BPA Distillation System. This all stainless steel, evaporator system was designed to separate and purify up to 8 mt./hr. of Bisphenol-A (BPA) from a complex mixture including isomers, acetone, and water.
In this design, the product feed is preheated and fed to the BPA Evaporator which is 2.3 meters diameter by 3.8 meters tall. The evaporator has a demister pad on the overheads and operates at 230°C and 0.009 bar-absolute. The evaporator overheads go to a condenser rated for 1.0 MM kcal/hr. which condenses the majority of the BPA (8,000 kb/hr.). The un-condensed vapors continue on to two more condensers; the isomer condenser and the freeze condenser where BPA isomers and acetone are condensed.
The bottoms from the BPA Evaporator recirculate through a reboiler rated for 1.3 MM kcal/hr. A side-stream from the bottoms flow continues to the Luwa Evaporator. This evaporator is 1.2 meters diameter by 3.1 meters tall and operates at 200°C and 0.009 bar-absolute. The bottoms from the Luwa Evaporator are fed to the BPA tar handling section of the plant (no longer available). The overheads from the Luwa Evaporator feed the recovery column.
The BPA Recovery Column is 0.8 meters diameter by 4 meters tall and operates at 200°C and 0.009 bar-absolute. The column bottoms drain back to the Luwa Evaporator. The column overheads go through a small condenser where the remaining pure BPA is condensed. The non-condensables continue on to the freeze condenser (not included in system).
The system consists of a flash evaporator with reboiler (IPP # 221631 and 221552), a 64 Sq. Ft. Luwa evaporator (IPP # 221539), a recovery column (IPP# 221626), and multiple overhead condensers and misc. pumps,