A kind of electrochemical preparation method of rhodium trichloride

A rhodium trichloride, electrochemical technology, applied in the field of preparation of rhodium trichloride, can solve the problems of large loss of rhodium, complex process, low yield of rhodium, etc.

Active Publication Date: 2020-10-20
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The above-mentioned methods for dissolving rhodium to prepare rhodium trichloride have low rhodium yield, complex process, large loss of rhodium in the washing process, and residual K + or Na + Impurity ions reduce the purity of rhodium trichloride and other shortcomings

Method used

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  • A kind of electrochemical preparation method of rhodium trichloride
  • A kind of electrochemical preparation method of rhodium trichloride
  • A kind of electrochemical preparation method of rhodium trichloride

Examples

Experimental program
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Effect test

Embodiment 1

[0075] (1) Set up the electrolytic cell. The electrolytic cell has three groups of cells and six electrode chambers. The upper cross section of the cell body is rectangular in size 150mm×50mm and 300mm in height; the bottom of the two electrode chambers of the same cell body is a semicircle In the same way, there is a gap of 20mm from the top of the second partition; the overflow hole is opened at a position 50mm from the top, with a diameter of 10mm; a cylindrical graphite electrode with a spectral grade of Φ12mm and a length of 300mm is selected, a total of 12, fixed on the top cover, X, The distance between the Y electrodes is 100mm.

[0076] (2) 1200 grams of rhodium powder with a purity of 99.95% are evenly added to the bottom of the electrolytic cell, and the superior grade pure hydrochloric acid of 8mol / l is added from the feeding port until all tank bodies are filled; The end is loaded with 60 volts of civilian AC, and the AC current is between 10 and 30 amperes; pay a...

Embodiment 2

[0079] (1) Set up the electrolytic cell. The electrolytic cell has three groups of cells and six electrode chambers. The upper cross-section of the cell body is rectangular in size 160mm×45mm and 230mm in height; the bottom of the two electrode chambers of the same cell body is a semicircle In the same way, there is a gap of 20mm from the top of the second partition; the overflow hole is opened at a position of 30mm from the top, with a diameter of 10mm; a cylindrical graphite electrode with a spectral grade of Φ12mm and a length of 300mm is selected, a total of 12, fixed on the top cover, X, The distance between the Y electrodes is 100mm.

[0080](2) 1200 grams of rhodium powder with a purity of 99.95% are evenly added to the bottom of the electrolytic cell, and the superior grade pure hydrochloric acid of 10mol / l is added from the feeding port until all tank bodies are filled; The terminal is loaded with 50 volts of civilian alternating current, and the alternating current i...

Embodiment 3

[0083] (1) Set up the electrolytic cell. The electrolytic cell has three groups of cells and six electrode chambers. The upper cross-section of the cell body is rectangular in size 140mm×50mm and 320mm in height; the bottom of the two electrode chambers of the same cell body is a semicircular arc In the same way, there is a gap of 20mm from the top of the second partition; the overflow hole is opened at a position of 70mm from the top, with a diameter of 10mm; a cylindrical graphite electrode with a spectral grade of Φ10mm and a length of 300mm is selected, a total of 12, fixed on the top cover, X, The distance between the Y electrodes is 100mm.

[0084] (2) 1200 grams of rhodium powder with a purity of 99.95% are evenly added to the bottom of the electrolytic cell, and the superior grade pure hydrochloric acid of 8mol / l is added from the feeding port until all tank bodies are filled; The terminal is loaded with 70 volts of civilian alternating current, and the alternating cur...

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Abstract

The invention discloses an electrochemical preparation method of rhodium trichloride. The electrochemical preparation method comprises: 1, arranging an electrolytic cell, wherein the electrolytic cellis 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 twoelectrode 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, adding rhodium powder to the bottom portion of the tank body, adding a hydrochloric acid solution, applying voltage on the electrode, and carrying out electrolysis treatment on therhodium powder to obtain a product stream containing rhodium trichloride; and 3, carrying out distillation and crystallization treatment on the product stream to obtain RhC13.xH2O, wherein x is 0-5. According to the present invention, the preparation method is simple and advanced; with the electrolytic cell provided with the plural groups of the tank bodies, a large amount of rhodium powder can becontinuously dissolved; and by supplementing hydrochloric acid and rhodium powder, the continuous production of rhodium trichloride is achieved, such that the automation degree is high.

Description

technical field [0001] The invention relates to a technique for preparing rhodium trichloride by an electrochemical method using rhodium powder as a raw material, and belongs to the field of preparation of rhodium trichloride. Background technique [0002] Rhodium trichloride (RhCl 3 ·xH 2 O, x=0~5) is one of the most common compounds of rhodium. It is often used as the initial raw material for the synthesis of other rhodium compounds and the preparation of rhodium-containing catalysts. Rhodium-containing compounds and catalysts are widely used in petrochemical and organic synthesis fields. For example, low-pressure carbonylation to produce butanol and octanol, methanol carbonylation to produce acetic acid and acetic anhydride all use a large number of rhodium compounds as homogeneous catalysts. In addition, in the fields of catalytic hydrogenation, fuel cells, automobile exhaust purification, electroplating and other fields, RhC1 3 ·xH 2 O is also an indispensable and...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25B1/26C25B9/18
CPCC25B1/26C25B9/70
Inventor 王世亮吕顺丰张明森李彤秦燕璜
Owner CHINA PETROLEUM & CHEM CORP
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