Title:
希土類燐酸塩の分散液及びその製造法
Document Type and Number:
Japanese Patent JP4072055
Kind Code:
B2
Abstract:
The invention concerns a colloidal dispersion of a phosphate of a rare earth and a process for its preparation. The dispersion is characterized in that it comprises anisotropic and disaggregated or disaggregatable particles of a phosphate of at least one rare earth and an anion of a monobasic acid, soluble in water and with a pKa of at least 2.5. It is prepared by a process in which a solution of a salt of at least one rare earth is mixed with phosphate ions while controlling the pH of the reaction medium to a value in the range 4 to 9 and in the presence of a monobasic acid, soluble in water and with a pKa of at least 2.5; the mixture obtained optionally undergoes a maturing step; the precipitate is then separated from the reaction medium; and said precipitate is then dispersed in water.
Inventors:
Jean eve chanchin
Application Number:
JP2002547613A
Publication Date:
April 02, 2008
Filing Date:
December 07, 2001
Export Citation:
Assignee:
Rhodia Electronics and Catalysis
International Classes:
C01B25/26; B01J13/00; C09K11/81; C09K23/00
Domestic Patent References:
| JP2003502254A | ||||
| JP1294521A | ||||
| JP11029312A | ||||
| JP5254812A | ||||
| JP4338105A | ||||
| JP9169973A | ||||
| JP11268906A | ||||
| JP6171914A |
Foreign References:
| WO1997028291A1 |
Other References:
E.Boakye, M.D.Petry, R.S.Hay,POROUS ALUMINUM OXIDE AND LANTHANUM PHOUPHATE FIBER COATINGS,Ceram. Eng. Sci. Proc,1996年12月24日,Vol.17, No.4,p.53-60
Attorney, Agent or Firm:
Motohiro Kurauchi
Hiroshi Kazama
Hiroshi Kazama