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Method for recovering platinum from waste

A waste recycling and platinum technology, applied in the direction of improving process efficiency, can solve the problems of affecting recycling efficiency, difficult to improve platinum recycling rate, etc., and achieve the effect of improving extraction rate, improving activation efficiency, and improving purification effect.

Active Publication Date: 2021-11-16
永兴阳光贵金属有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The existing waste recycling platinum process is relatively conventional, it is difficult to improve the recovery rate of platinum, which affects the recovery efficiency, based on this, further improvement is needed

Method used

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  • Method for recovering platinum from waste
  • Method for recovering platinum from waste

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Experimental program
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Effect test

Embodiment 1

[0035] A kind of method of reclaiming platinum from waste material of the present embodiment, comprises the following steps:

[0036] Step 1: Dissolution of waste materials:

[0037] Mix precious metal waste and aqua regia at a weight ratio of 8:1, and then carry out stirring and dissolving treatment in the reactor. The temperature of stirring and dissolving is 80°C, the dissolution time is 30min, and the stirring speed is 100r / min. After the stirring is completed, the waste Dissolve completely;

[0038] Step 2: Settling of platinum:

[0039] Add ammonium chloride solution with a mass fraction of 30% to the dissolving material in step 1, then stir at a speed of 100r / min for 10 minutes, then let it stand for precipitation to obtain ammonium chloroplatinate, and finally use solution washing to obtain a sinking platinum material ;

[0040] Step 3: Activation processing:

[0041] S1: Send the sedimentation platinum material and modified clay into deionized water for ultrasonic...

Embodiment 2

[0057] A kind of method of reclaiming platinum from waste material of the present embodiment, comprises the following steps:

[0058] Step 1: Dissolution of waste materials:

[0059]The precious metal waste and aqua regia were mixed according to the weight ratio of 8:1, and then stirred and dissolved in the reactor. The temperature of stirring and dissolving was 120 ° C, the dissolution time was 40 min, and the stirring speed was 600 r / min. After stirring, the waste was dissolved. dissolve completely;

[0060] Step 2: Settlement of platinum:

[0061] Add 40% mass fraction of ammonium chloride solution to the dissolving material in step 1, then stir at a speed of 300r / min for 20min, then stand for precipitation to obtain ammonium chloroplatinate, and finally use the solution to wash to obtain sedimentation platinum material ;

[0062] Step 3: Activation processing:

[0063] S1: put the precipitated platinum material and the modified clay into deionized water for ultrasonic ...

Embodiment 3

[0079] A method for recycling platinum from waste material of the present embodiment, comprising the following steps:

[0080] Step 1: Dissolution of waste:

[0081] The precious metal waste and aqua regia were mixed according to the weight ratio of 8:1, and then stirred and dissolved in the reaction kettle. The temperature of stirring and dissolving was 100 ° C, the dissolution time was 35 min, and the stirring speed was 300 r / min. After stirring, the waste was dissolved. dissolve completely;

[0082] Step 2: Settlement of platinum:

[0083] Add ammonium chloride solution with a mass fraction of 35% to the dissolving material in step 1, then stir at a speed of 200 r / min for 15 minutes, then stand for precipitation to obtain ammonium chloroplatinate, and finally use the solution to wash to obtain sedimentation platinum material ;

[0084] Step 3: Activation processing:

[0085] S1: put the precipitated platinum material and the modified clay into deionized water for ultras...

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Abstract

The invention provides a method for recovering platinum from waste. The method comprises the following steps: 1, dissolving the waste materials; 2, settling platinum; 3, activating; 4, secondary precipitation reduction; and 5, maintenance. According to the method, in the platinum recovery process, the waste is firstly subjected to dissolution treatment and then platinum is subjected to precipitation reduction, and the platinum can be firstly extracted through precipitation reduction treatment of the ammonium chloride solution, so that the extraction rate of the platinum is increased; platinum is subjected to improvement treatment through modified clay, the modified clay is firstly treated with ferric chloride, the surface porosity of the modified clay is improved, then the modified clay is subjected to calcining furnace variable temperature treatment, the activity of the clay is enhanced, the clay and the platinum are compounded, and therefore the bearing effect is achieved, and the purpose that in irradiation treatment in a proton irradiation box and plasma treatment, the activation efficiency of platinum is improved, and finally, secondary precipitation reduction is carried out, so that the purification effect of the platinum can be greatly improved.

Description

technical field [0001] The invention relates to the technical field of platinum recycling, in particular to a method for recycling platinum from waste materials. Background technique [0002] Precious metals mainly refer to eight metal elements including gold, silver and platinum group metals (ruthenium, rhodium, palladium, osmium, iridium, platinum). Most of these metals have beautiful colors, are quite resistant to chemicals, and are not easy to cause chemical reactions under normal conditions. Rare gold is not a single metal, but an alloy of some rare metals. Because rare gold has some characteristics comparable to gold, such as the same color as gold, the same chemical stability as gold and similar mechanical properties. Jewelry made of rare gold is almost as real as gold jewelry; platinum is white gold. It is a very precious precious metal. Compared with gold and silver, it was used in jewelry making later. Because platinum has bright white color, excellent ductilit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B11/00C22B7/00
CPCC22B11/042C22B7/007Y02P10/20
Inventor 陈平华
Owner 永兴阳光贵金属有限公司
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