Title:
フェノール-BPA付加物結晶を製造するための晶析装置および方法
Document Type and Number:
Japanese Patent JP2013537473
Kind Code:
A
Abstract:
A method for the evaporative production of phenol-BPA adduct crystals in a crystallizer is provided. First, a supersaturated BPA solution is introduced into a crystallizer that includes a cylindrical vessel and a concentrically-disposed draft tube that defines an annular space between the vessel and tube. Next, the BPA solution is circulated through the draft tube and annular space while a coolant is uniformly distributed in the circulating flow by radially injecting a volatile hydrocarbon compound at between about 30% and 60% of a radial extent of the annular space of to form a BPA mixture. Phenol-BPA adduct crystals are produced in the vessel by evaporating the volatile hydrocarbon compound out of the BPA mixture. The method provides a consistent and uniform concentration of coolant across the surface of the boiling zone that prevents or at least reduces unwanted crystal nucleation.
Inventors:
Fesco, Stephen W.
Application Number:
JP2013516593A
Publication Date:
October 03, 2013
Filing Date:
June 08, 2011
Export Citation:
Assignee:
Badger Licensing LRC
International Classes:
B01D9/02; C07C37/86; C07C39/16
Attorney, Agent or Firm:
Yuzo Yamazaki
Toshiaki Akamatsu
Ono Wataru
Okuko Masako
Tadao Naito
Chihiro Imai
Takeko Miko
Kei Kiuchi
Hiroaki Nishimura
Toshiaki Akamatsu
Ono Wataru
Okuko Masako
Tadao Naito
Chihiro Imai
Takeko Miko
Kei Kiuchi
Hiroaki Nishimura