# US 2014/0150608 A1 · Method of recovering platinum group elements

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- Number: US 2014/0150608 A1
- Document ID: US20140150608A1
- Status: Published application
- Kind: A1
- Application number: 14/004,334
- Filed: 2012-03-07
- Published: 2014-06-05
- Earliest claimed: 2011-03-11
- Assignees: Dowa Metals & Mining Co., Ltd.; Tanaka Kikinzoku Kogyo K.K.
- Inventors: Yuzuru Nakamura; Minoru Kawasaki; Katsunori Yamaguchi; Tetsuya Ueda; Keiko Ishizaki
- Web page: https://patentgrep.com/patent/US20140150608A1

## CPC

- C22B 11/02: by dry processes
- C22B 11/021: {Recovery of noble metals from waste materials}
- Y02P 10/20: Recycling
- C22B: PRODUCTION AND REFINING OF METALS (electrolytic C25); PRETREATMENT OF RAW MATERIALS
- Y02P: CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS

## Abstract

Provided is a method of unevenly distributing a specific element in a copper phase out of platinum group elements that exist in the copper phase, including further adding copper into a molten copper phase containing the platinum group elements including at least rhodium, thereby increasing a distribution ratio of rhodium in the molten copper phase.

## Claims

### Claim 1

A method of recovering platinum group elements, comprising:
further adding copper into a molten copper phase containing platinum group elements including at least rhodium, thereby
increasing a content of the rhodium in an upper phase of the molten copper phase; and
recovering the platinum group elements including the rhodium from the upper phase.

### Claim 2

A method of recovering platinum group elements, comprising:
adding iridium into a molten copper phase containing platinum group elements including at least rhodium, and moving the iridium to a bottom phase of the molten copper phase, thereby
increasing a content of the rhodium in an upper phase of the molten copper phase; and
recovering the platinum group elements including the rhodium from the upper phase.

### Claim 3

A method of recovering platinum group elements, comprising:
adding manganese into a molten copper phase containing platinum group elements including at least rhodium, thereby
increasing a content of the rhodium in an upper phase of the molten copper phase; and
recovering the platinum group elements including the rhodium from the upper phase.

### Claim 4

A method of recovering platinum group elements, comprising:
adding manganese into a molten copper phase containing platinum group elements including rhodium and at least one of platinum and palladium, thereby
increasing a content of the rhodium and at least one of the platinum and the palladium in an upper phase of the molten copper phase; and
recovering the platinum group elements from the upper phase.

### Claim 5 (depends on 1)

The method of recovering platinum group elements according to claim 1, comprising:
further adding iridium into the molten copper phase to which the copper is further added, and moving the iridium to a bottom phase of the molten copper phase, thereby increasing the content of the rhodium in the upper phase of the molten copper phase; and
recovering the platinum group elements including the rhodium from the upper phase.

### Claim 6 (depends on 1)

The method of recovering platinum group elements according to claim 1, comprising:
further adding manganese into the molten copper phase to which the copper is further added, thereby
increasing the content of the rhodium in the upper phase; and
recovering the platinum group elements including the rhodium from the upper phase.

### Claim 7 (depends on 1)

The method of recovering platinum group elements according to claim 1, wherein the recovered platinum group is rhodium.

### Claim 8 (depends on 3)

The method of recovering platinum group elements according to claim 3, wherein the recovered platinum group element is rhodium and at least one of platinum, and palladium.

### Claim 9 (depends on 2)

The method of recovering platinum group elements according to claim 2, wherein the recovered platinum group is rhodium.

### Claim 10 (depends on 5)

The method of recovering platinum group elements according to claim 5, wherein the recovered platinum group is rhodium.

### Claim 11 (depends on 4)

The method of recovering platinum group elements according to claim 4, wherein the recovered platinum group element is rhodium and at least one of platinum, and palladium.

### Claim 12 (depends on 6)

The method of recovering platinum group elements according to claim 6, wherein the recovered platinum group element is rhodium and at least one of platinum, and palladium.