Continuous crystallization process
First Claim
1. An improved continuous crystallization process comprising steps of supplying a crystallization material containing bisphenol A to a crystallizer to form the crystals of an adduct of bisphenol A and phenol or the crystals of bisphenol A, subjecting the slurry discharged from the crystallizer to solid/liquid separation, and recovering the crystals, part of the mother liquor being circulated to the crystallizer.
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Accused Products
Abstract
A continuous crystallization process comprising the steps of supplying a crystallization material containing bisphenol A to a crystallizer to form crystals of an adduct of bisphenol A and phenol or crystals of bisphenol A, subjecting the slurry discharged from the crystallizer to solid/liquid separation, and recovering the crystals, wherein part of the mother liquor is circulated to the crystallizer. According to this process, the heat duty to be removed is reduced, deposition of solids on the inner surfaces of the crystallizer, particularly on the heat transferring surface of the cooler is restrained, and consequently the continuous operating time of the apparatus is prolonged.
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Citations
5 Claims
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1. An improved continuous crystallization process comprising steps of supplying a crystallization material containing bisphenol A to a crystallizer to form the crystals of an adduct of bisphenol A and phenol or the crystals of bisphenol A, subjecting the slurry discharged from the crystallizer to solid/liquid separation, and recovering the crystals,
part of the mother liquor being circulated to the crystallizer.
Specification