Title:
METHOD FOR REMOVING IMPURITY METAL ION IN AQUEOUS SOLUTION CONTAINING FLUORIDE ION OF TITANIUM
Document Type and Number:
Japanese Patent JP3800122
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a method for efficiently separating and removing metals, such as iron, included as impurities in recovering the titanium included in a waste solution of pickling etc.
SOLUTION: The aqueous solution containing the fluoride ions of the titanium, such as the waste solution of pickling, is acted on an anion exchanger previously subjected to substitution of an exchange group with hydrogen ions. The aqueous solution containing one or two kinds or more among the ions of iron, chromium, nickel, manganese, copper, and cobalt, as the impurity ions is more desirable as the effect of separating and removing these ions is high. Also, the concentration of the free acids in the aqueous solution below 2N is more desirable for efficient separation and removal of the ions.
Inventors:
Shigeru Kitani
Tsutomu Fukumura
Tsutomu Fukumura
Application Number:
JP2002102127A
Publication Date:
July 26, 2006
Filing Date:
April 04, 2002
Export Citation:
Assignee:
SUMITOMO METAL INDUSTRIES,LTD.
International Classes:
C01G23/02; C22B34/12; C22B3/42; C22B7/00; (IPC1-7): C22B34/12; C01G23/02; C22B3/42; C22B7/00
Domestic Patent References:
| JP35009904B1 | ||||
| JP2000107506A | ||||
| JP2000265223A |
Attorney, Agent or Firm:
Michio Mori
Terutada Hogami
Terutada Hogami