METHOD FOR SEPARATION AND RECOVERY OF NOBLE METALS

Title:

METHOD FOR SEPARATION AND RECOVERY OF NOBLE METALS

Document Type and Number:

WIPO Patent Application WO/2007/080963

Kind Code:

A1

Abstract:

A method for separation and recovery of noble metals which makes it possible to isolate noble metal components efficiently by easy operation, that is, a method which comprises passing a solution of metals in hydrochloric acid prepared by treating a metal material with hydrochloric acid through the first cellulose column, eluting through development the noble metal component adsorbed on the cellulose with a hydrochloric acid/2-propanone mixture to obtain a fraction containing light platinum-group metals and a fraction containing heavy platinum -group metals and gold, separating the former fraction with the above mixture into fractions containing palladium, ruthenium and rhodium respectively, passing the fraction containing heavy platinum-group metals and gold through the second cellulose column to made them adsorbed on the cellulose, eluting them from the cellulose with a hydrochloric acid/1-butanol mixture to obtain fractions containing gold, osmium, iridium and platinum respectively, and recovering the noble metals from the fractions containing them respectively as simple substances.

Inventors:

NIISAWA KAZUHIRO (JP)
SHIMIZU KAZUO (JP)
NOZAKI TADASHI (JP)

Application Number:

PCT/JP2007/050318

Publication Date:

July 19, 2007

Filing Date:

January 12, 2007

Export Citation:

Click for automatic bibliography generation Help

Assignee:

NIISAWA KAZUHIRO (JP)
SHIMIZU KAZUO (JP)
NOZAKI TADASHI (JP)

International Classes:

C22B11/00; C22B3/04; C22B3/24; C01G55/00

Foreign References:

JP2006193763A	2006-07-27
JP2006348359A	2006-12-28
JPS4813219A
JPS544816A	1979-01-13
JPS467453A
JPS62238337A	1987-10-19
JPS5550439A	1980-04-12

Other References: