Bisphenol A preparation apparatus and preparation method
First Claim
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1. A bisphenol A preparing apparatus comprising:
- a main reactor that discharges a reaction product of a reaction between phenol and acetone through a reaction product stream;
a flash reactor that separates the reaction product stream into a bisphenol A concentration stream and a phenol concentration stream;
a bisphenol A purification unit that separates the bisphenol A concentration stream into a bisphenol A purification stream and a mother liquid stream and discharges the separated mother liquid stream;
a recovery reactor that discharges a recovered reaction product, which is obtained by additionally reacting the mother liquid stream separated in the bisphenol A purification unit, to the main reactor through a recovered reaction product stream; and
a bypass line that is positioned between the recovery reactor and the main reactor and that introduces at least some of the separated mother liquid stream into the flash reactor.
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Abstract
Provided are an apparatus and a method for preparing bisphenol A. In the present invention, all or some of a mother liquid stream is circulated to a flash rector through a bypass line after crystallization in a process of preparing bisphenol A so as to increase a conversion rate of bisphenol A in a reactor, reduce energy, and use a heating source of phenol to be discharged to an upper side of the flash reactor, and thus the reaction efficiency of the whole process can be increased.
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18 Claims
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1. A bisphenol A preparing apparatus comprising:
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a main reactor that discharges a reaction product of a reaction between phenol and acetone through a reaction product stream; a flash reactor that separates the reaction product stream into a bisphenol A concentration stream and a phenol concentration stream; a bisphenol A purification unit that separates the bisphenol A concentration stream into a bisphenol A purification stream and a mother liquid stream and discharges the separated mother liquid stream; a recovery reactor that discharges a recovered reaction product, which is obtained by additionally reacting the mother liquid stream separated in the bisphenol A purification unit, to the main reactor through a recovered reaction product stream; and a bypass line that is positioned between the recovery reactor and the main reactor and that introduces at least some of the separated mother liquid stream into the flash reactor. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A bisphenol A preparing method comprising:
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a step of reacting phenol with acetone in a main reactor and discharging a reaction product through a reaction product stream; a step of separating the reaction product stream into a bisphenol A concentration stream and a phenol concentration stream in a flash reactor; a step of separating the bisphenol A concentration stream into a bisphenol A purification stream and a mother liquid stream in a bisphenol A purification unit and discharging the separated mother liquid stream; a step of additionally reacting the separated mother liquid stream through a recovery reactor after the mother liquid stream separated in the bisphenol A purification unit, and discharging the separated mother liquid stream to the main reactor through a recovered reaction product stream; and a step of introducing at least some of the separated mother liquid stream from the recovered reaction product stream into the flash reactor through a bypass line. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18)
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Specification