APPARATUS AND METHOD FOR PREPARING BISPHENOL A
1 Assignment
0 Petitions
Accused Products
Abstract
The present application relates to a bisphenol A preparation apparatus and preparation method, and provides a bisphenol A preparation apparatus and preparation method, which can increase the overall energy efficiency of a process by using an internal heating source.
-
Citations
35 Claims
-
1-18. -18. (canceled)
-
19. A method for preparing bisphenol A comprising steps of:
-
crystallizing bisphenol A through a first crystallizer in a bisphenol A concentration stream comprising a reaction product that phenol and acetone are reacted and discharging the adduct of crystallized bisphenol A and phenol; separating the adduct of crystallized bisphenol A and phenol in said first crystallizer from the mother liquor through a first solid-liquid separator and discharging it; introducing a phenol stream into the adduct of crystallized bisphenol A and phenol discharged from said first solid-liquid separator through a phenol introduction port and discharging a mixed stream of the phenol with said adduct of crystallized bisphenol A and phenol; heating said phenol stream through a first heat exchanger before introducing the phenol stream through said phenol introduction port; melting the adduct of crystallized bisphenol A and phenol in the mixed stream flowing out from said phenol introduction port through a second heat exchanger to discharge a molten stream; and introducing said discharged molten stream to recrystallize bisphenol A through a second crystallizer. - View Dependent Claims (20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35)
-
Specification