EP0106327A2
Expired / Lapsed
EP
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Selective separation of noble metals
Assignee: Avantor Performance Materials LLC
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Filing: 1983-10-13
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Granted: —
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Expires: 2003-10-13
Abstract
Abstract A novel method of selectively separating noble metals from solutions containing same utilizes solid supports bearing amine functions appropriately spaced and acidic pH conditions of from about pH 0.5 to about 2.5.
Inventors
- 👤 Laura Jane Crane
- 👤 Ramachandran Ganapathy
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-30 13:48
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/28; C02F1/288; C22; C22B; C22B3/00; C22B3/20; C22B3/22; C22B3/24; B; B01; B01D; B01D15/00; B01D15/08; B01J; B01J20/00; B01J20/02; B01J20/06; B01J20/08; B01J20/10; B01J20/103; B01J20/22; B01J20/26; B01J20/261; B01J20/264; B01J20/265; B01J20/267; B01J20/28; B01J20/28002; B01J20/28004; B01J20/281; B01J20/286; B01J20/30; B01J20/32; B01J20/3202; B01J20/3204; B01J20/3206; B01J20/3208; B01J20/321; B01J20/3214; B01J20/3217; B01J20/3231; B01J20/3242; B01J20/3244; B01J20/3246; B01J20/3257; B01J20/3268; B01J20/3272; C01; C01G; C01G55/00; C01G55/001; C01G7/00; C01G7/003; C02F1/285; C22B11/00; C22B11/04; B01J2220/00; B01J2220/50; B01J2220/54; B01J2220/58; Y; Y02; Y02P; Y02P10/00; Y02P10/20
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
105 words
A method of separating a noble metal from a solution containing said noble metals comprising bringing said solution at a pH withing the range of from about pH 0.5 to 2.5 into contact with a diamine bonded phase solid support of the formula wherein m is a whole integer of from 1 to 6, n is a whole integer of from 2 to 5, x is a whole integer of from about 1 to 10, y is a whole integer of from 1 to 3 and p is an integer equal to 3 minus y, whereby the noble metal is retained on said solid support.
Claim 2
Independent Claim
105 words
A method of separating a noble metal from a solution containing said noble metals comprising bringing said solution at a pH withing the range of from about pH 0.5 to 2.5 into contact with a diamine bonded phase solid support of the formula wherein m is a whole integer of from 1 to 6, n is a whole integer of from 2 to 5, x is a whole integer of from about 1 to 10, y is a whole integer of from 1 to 3 and p is an integer equal to 3 minus y, whereby the noble metal is retained on said solid support.
Claim 3
Independent Claim
114 words
A method of selectively separating a noble metal from a solution containing both a noble metal and a base or transition metal comprising bringing said solution at a pH within the range of from about pH 0.5 to 2.5 into contact with a diamine bonded phase solid support of the formula wherein m is a whole integer of from 1 to 6, n is a whole integer of from 2 to 5, x is a whole integer of from about 1 to 10, y is a whole integer of from 1 to 3 and p is an integer equal to 3 minus y, whereby the noble metal is selectively retained on said solid support.
Claim 4
Independent Claim
114 words
A method of selectively separating a noble metal from a solution containing both a noble metal and a base or transition metal comprising bringing said solution at a pH within the range of from about pH 0.5 to 2.5 into contact with a diamine bonded phase solid support of the formula wherein m is a whole integer of from 1 to 6, n is a whole integer of from 2 to 5, x is a whole integer of from about 1 to 10, y is a whole integer of from 1 to 3 and p is an integer equal to 3 minus y, whereby the noble metal is selectively retained on said solid support.
Claim 5
Independent Claim
20 words
The method of any of claims 1 and 2 wherein m is 3, n is 2 and x is 1.
Claim 6
Independent Claim
30 words
The method of any of claims 1 and 2 wherein the noble metal is a metal selected from the group consisting of ruthenium, rhodium, palladium, osmium, iridium, platinum and gold.
Claim 7
Dependent Claim
26 words
The method of claim 3 wherein the noble metal is a metal selected from the group consisting of ruthenium, rhodium, palladium, osmium, iridium, platinum and gold.
Claim 8
Independent Claim
22 words
The method of any of claims 1, 2, 3, 4 and 5 wherein the pH of the solution is about pH 1.
Claim 9
Dependent Claim
22 words
.7. The method of claim 1 wherein the support is selected from the group consisting of silica, alumina and a cross-linked resin.
Claim 10
Dependent Claim
21 words
The method of claim 2 wherein the support is selected from the group consisting of silica, alumina and a cross-linked resin.
Claim 11
Dependent Claim
12 words
The method of claim 3 wherein the solid support is silica gel.
Claim 12
Dependent Claim
39 words
Use of the method according to any of claims 1 to 9 for recovering noble metals from industrial waste, removing noble metals from plating solutions, separating noble metals from sea water, or recovering noble metals from metal refinery wastes.
References Cited (Backward Citations)
No citation records indexed.
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