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Electrochemical preparation method of chloroiridic acid

An electrochemical, chloroiridic acid technology, applied in the direction of electrolysis process, electrolysis components, etc., can solve the problems of increasing preparation steps, many method steps, complex process, etc.

Inactive 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

[0006] This process is complicated, and there are many steps in the method. Impurity ions such as K+ or Na+ are introduced, and impurity ions such as K+ or Na+ in the solution need to be removed by further reaction and crystallization.
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

Method used

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  • Electrochemical preparation method of chloroiridic acid
  • Electrochemical preparation method of chloroiridic acid
  • Electrochemical preparation method of chloroiridic acid

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] 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 1 Five 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, a...

Embodiment 2

[0050] Prepare the chloroiridic acid solid 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 communication channel 5 is a semicircle; during the electrolytic reaction, Apply 30 volts of civilian alternating current at both ends of the A and B electrodes; when the iridium content in the hydrochloric acid was 21 grams per liter, continue to add hydrochloric acid and iridium powder, and control the adding speed of hydrochloric acid to be 11.5 milliliters / minute, according to the consumption of iridium powder Situation adds iridium powder, and the product stream that dissolves 21 gram / liter concentration iridium this moment is discharged from product outlet 2; Finally obtain 58 gram chloroiridic acid solids.

Embodiment 3

[0052] 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 relates to an electrochemical preparation method of chloroiridic acid. The electrochemical preparation method comprises: 1, arranging an electrolytic cell, wherein the electrolytic cellis separated into at least two tanks by a first separation plate arranged in the electrolytic cell, the first separation plate is provided with an overflow hole, the tank is divided into two electrodechambers by a second separation plate arranged in the tank, the two electrode chambers are communicated to each other, and electrodes are respectively arranged in the electrode chambers; 2, adding iridium powder into the tank, making a hydrochloric acid solution sequentially pass through the tanks, and carrying out a continuous electrolysis reaction on the iridium powder and the hydrochloric acidsolution by applying voltage on the electrodes; 3, when the iridium in the hydrochloric acid solution in the electrolytic cell reaches a certain concentration, supplementing the tank with a hydrochloric acid solution and the iridium powder to continuously form a product stream containing stable iridium concentration; and 4, filtering the product stream, concentrating, and drying to obtain a chloroiridic acid solid. According to the present invention, the method has advantages of simple preparation process, high automation degree, environmental protection, no by-products and high product purity.

Description

technical field [0001] The invention relates to the field of preparation of chloroiridic acid, in particular to an electrochemical preparation method of chloroiridic acid. 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 prepara...

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
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