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Electrochemical dissolving method of platinum powder

An electrochemical and platinum powder technology, applied in the field of electrochemical dissolution of platinum powder, can solve the problems of large consumption of hydrochloric acid and nitric acid, slow metal platinum dissolution, environmental pollution, etc., and achieve simplified operation, high degree of automation, and preparation process simple effect

Active Publication Date: 2018-12-11
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantages of this method are: ①The prepared chloroplatinic acid solution contains NO 3 - 2. The dissolution rate of metallic platinum is slow and time-consuming; 3. The consumption of hydrochloric acid and nitric acid is large; 4. A large amount of NO is produced x gas, pollution

Method used

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  • Electrochemical dissolving method of platinum powder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] 1500g of platinum powder with a purity of 99.95% is evenly added to the bottom of the cell body of the electrolytic cell, and then 8 mol / l of high-grade pure hydrochloric acid is introduced into the first cell body of the electrolytic cell through the feeding port, when the hydrochloric acid passes through the second separator After all the tank bodies of the electrolytic cell are filled with the overflow hole on the top, stop adding hydrochloric acid. The size of the cell body of the electrolytic cell is 190mm×60mm×300mm, there is a gap of 20mm between the second separator and the top cover, and the overflow hole is opened at a position 50mm away from the top cover, with a diameter of 10mm.

[0052] The A and B electrodes in the same tank are loaded with 80 volts of civilian alternating current, and the magnitude of the alternating current is between 1-20 amperes, and the platinum powder in the electrolytic cell is electrolyzed. Meanwhile, the flow of cooling water is ...

Embodiment 2

[0055] Add 1500g of platinum powder with a purity of 99.95% evenly to the bottom of the cell body of the electrolytic cell, and then feed 10mol / l superior pure hydrochloric acid into the first cell body of the electrolytic cell through the feeding port, when the hydrochloric acid passes through the second separator After all the tank bodies of the electrolytic cell are filled with the overflow hole on the top, stop adding hydrochloric acid. The size of the cell body of the electrolytic cell is 200mm×55mm×320mm, there is a gap of 20mm between the second separator and the top cover, and the overflow hole is opened at a distance of 70mm from the top cover, with a diameter of 10mm.

[0056] A 70-volt civilian alternating current is loaded at both ends of the A and B electrodes in the same tank, and the magnitude of the alternating current is between 1-20 amperes, and the platinum powder in the electrolytic cell is electrolyzed. Meanwhile, the flow of cooling water is controlled to...

Embodiment 3

[0059] Add 1500g of platinum powder with a purity of 99.95% evenly to the bottom of the cell body of the electrolytic cell, and then feed 10mol / l superior pure hydrochloric acid into the first cell body of the electrolytic cell through the feeding port, when the hydrochloric acid passes through the second separator After all the tank bodies of the electrolytic cell are filled with the overflow hole on the top, stop adding hydrochloric acid. The size of the cell body of the electrolytic cell is 180mm×60mm×280mm, there is a gap of 20mm between the second separator and the top cover, and the overflow hole is opened at a position 30mm away from the top cover, with a diameter of 10mm.

[0060] The A and B electrodes in the same tank are loaded with 80 volts of civilian alternating current, and the magnitude of the alternating current is between 1-20 amperes, and the platinum powder in the electrolytic cell is electrolyzed. Meanwhile, the flow of cooling water is controlled to keep ...

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Abstract

The invention belongs to the technical field of platinum powder dissolving, and relates to an electrochemical dissolving method of platinum powder. The electrochemical dissolving method comprises: A,arranging an electrolytic cell, wherein the electrolytic cell is divided into at least two tank bodies by a first separation plate arranged in the electrolytic cell, the first separation plate is provided with an overflow hole, the tank body is divided into two electrode chambers by a second separation plate arranged in the tank body, the bottom portions of the two electrode chambers are communicated, and electrodes are respectively arranged in the two electrode chambers; and B, adding platinum powder to the bottom portion of the tank body, adding hydrochloric acid, applying alternating current between the two electrodes in the same tank body, continuously electrolyzing the platinum powder, and supplementing hydrochloric acid to the electrolytic cell after electrolyzing for a certain timeso as to form the platinum-containing hydrochloric acid solution product stream having the stable platinum concentration, wherein the product stream has characteristics of continuous hydrochloric acidfeeding and continuous discharge. With the method of the present invention, other impurity ions are not introduced, the purity of the product is high, the preparation process is simple, the platinumpowder can be continuously dissolved, no by-product is generated, and the method has advantages of environmental protection and the like.

Description

technical field [0001] The invention belongs to the technical field of platinum powder dissolution, and in particular relates to an electrochemical dissolution method of platinum powder. Background technique [0002] Platinum is a transition metal with high density, ductility, silvery white color, metallic luster, hardness 4-4.5, relative density 21.45, and melting point 1773°C. Rich in ductility, it can be drawn into very thin platinum wire and rolled into extremely thin platinum foil. The chemical properties are extremely stable, insoluble in strong acid and strong alkali solutions, and not oxidized in the air. [0003] Platinic acid aqueous solution is the starting material for the synthesis of various platinum-containing compounds and the preparation of catalyst loading liquids, and is widely used in the fields of petrochemical, pharmaceutical, fine chemical and organic synthesis. At present, the methods for dissolving precious metal platinum to prepare chloroplatinic ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B1/26
CPCC25B1/26
Inventor 王世亮吕顺丰张明森李彤秦燕璜
Owner CHINA PETROLEUM & CHEM CORP