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A method for continuous electrochemical dissolution of iridium powder

An electrochemical and electrolytic cell technology, applied in the direction of electrolysis components, electrolysis process, etc., can solve the problems of low purity of iridium compounds, increase the preparation steps, increase the loss of iridium, etc., achieve simplified operation, high product purity, ensure efficiency and stability sexual effect

Active Publication Date: 2020-07-24
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Due to the high price of iridium, the dissolution process must minimize the loss of iridium, and in order to remove other ions introduced, the preparation steps will be increased to increase the loss of iridium
Therefore the iridium compound purity that above-mentioned existing method prepares is lower

Method used

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  • A method for continuous electrochemical dissolution of iridium powder
  • A method for continuous electrochemical dissolution of iridium powder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] according to figure 1 The shown structure is provided with an electrolytic cell, and the electrolytic cell is made of quartz glass, and is divided into five tanks by the first dividing plate 8 ( figure 1 Only three tanks are shown in the figure, those skilled in the art can understand that according to figure 1Five tanks are set in the manner shown). The electrode chamber of the cell body of the electrolytic cell is 55mm long, 40mm wide and 300mm high. The first partition 8 and the second partition 9 are arranged in parallel, the second partition 9 has a gap of 20 mm from the top, and the bottom has a communicating channel 5 with a triangular cross-section. Each cell is divided into two electrode chambers by the second separator 9 . The overflow holes 4 (a, b) are opened on the top of the first partition 8, at a position 50 mm away from the top, and the hole diameter is 10 mm. A hydrochloric acid feed port 1 is arranged on the side wall of the first tank body, an...

Embodiment 2

[0043] Continuous electrochemically dissolving iridium powder in the same manner as in Example 1, the difference is that the electrode chamber of the electrolytic cell body is 60mm long, wide 35mm, and high 320mm; the cross section of the communicating channel 5 is a semicircle; , apply 30 volts of civilian alternating current at both ends of the A and B electrodes; Add iridium powder, now dissolve the product stream that has 21 grams per liter of concentration iridium to discharge from product outlet 2.

Embodiment 3

[0045] according to figure 2 The shown structure is provided with an electrolytic cell, and the electrolytic cell is made of quartz glass, and is divided into five tanks by the first dividing plate 8 ( figure 2 Only four tanks are shown in the figure, those skilled in the art can understand that according to figure 2 Five tanks are set in the manner shown). The electrode chamber of the cell body of the electrolytic cell is 58mm long, 40mm wide and 300mm high. The first partition 8 and the second partition 9 are vertically arranged, the second partition 9 has a gap of 20mm from the top, and the bottom has a semicircular communication channel 5 in section. Each cell is divided into two electrode chambers by the second separator 9 . The overflow hole 4 (a, b, c, d) is opened on the upper side of the first partition 8, 50 mm from the top, and the diameter is 10 mm. The overflow hole 4 adjacent to the first partition 8 is opened on the second partition 9 on both sides. A hy...

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Abstract

The invention discloses an iridium powder dissolving method, particularly to a continuous electrochemical dissolving method for iridium powder. The continuous electrochemical dissolving method comprises: 1, 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 plateis 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; 2, continuously adding iridium powder and a hydrochloric acid solution to the tank body, making the hydrochloric acid solution sequentially flow through the tank body, and carrying out a continuous electrolysis reaction by applying voltage on the electrodes; and 3, when the iridium in the hydrochloric acid solutionin the electrolytic cell achieves a predetermined concentration, continuously supplementing a hydrochloric acid solution and iridium powder into the tank body to continuously form a product stream having the stable iridium concentration. According to the present invention, the method has characteristics of simple preparation process, high automation degree, environmental protection, no by-productand high product purity.

Description

technical field [0001] The invention relates to a method for dissolving iridium powder, in particular to a method for continuously electrochemically dissolving iridium powder. Background technique [0002] Iridium is a fairly malleable silver-white noble metal with a face-centered cubic crystal, with a melting point of 2410°C and a boiling point of 4130°C. Usually, commercial iridium is in powder form, i.e. iridium powder. At present, its domestic market price is 100,000-200,000 yuan / kg. Metal iridium is the initial raw material for the synthesis of other iridium-containing compounds and the preparation of iridium-containing catalysts. [0003] Iridium and iridium compounds are widely used as catalysts for various chemical reactions such as isomerization, hydroformylation or carbonylation. Now, special carbonylation reactions catalyzed by iridium or its compounds have been paid attention to. A typical example is the iridium-catalyzed carbonylation of methanol for the pre...

Claims

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Application Information

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Patent Type & Authority Patents(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
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