Login| Sign Up| Help| Contact|

Patent Searching and Data


Title:
分別結晶化によるリン酸の精製方法及び装置
Document Type and Number:
Japanese Patent JP5566585
Kind Code:
B2
Abstract:
The present invention relates to a method for purifying phosphoric acid through fractional crystallization and a device thereof. Specifically in the method for purifying polluted phosphoric acid, a first input mixture which takes phosphoric acid as main component and mainly comprises a first group of impurity is mixed with a second input mixture that takes phosphoric acid as main component and mainly comprises a second group of impurities. The impurities with highest concentration in two mixtures are different. The mixed input mixture is crystallized in a multistage crystallization technique.The obtained crystallization layer is heated and melted into fraction for extracting clean phosphoric acid. The device used for realizing the method is characterized by providing a water supplier which is used for adjusting the weight percentage of phosphoric acid in the used mixture to a specific value.

Inventors:
Thierry Basaro
Patrick Gaylard
Manfred Stepanski
Application Number:
JP2008215377A
Publication Date:
August 06, 2014
Filing Date:
August 25, 2008
Export Citation:
Click for automatic bibliography generation   Help
Assignee:
Sulzer Chemtech Akchen Gesell Shaft
February Society Anonym
International Classes:
C01B25/234; B01D9/02
Domestic Patent References:
JP62030608A
JP2006069845A
JP2008247733A
Attorney, Agent or Firm:
Asamura patent office
Hideto Asamura
Hajime Asamura
Katsunori Ando
Yukihiro Ikeda
Yuichiro Asano



 
Previous Patent: JPS5566584

Next Patent: JPS5566586