Efficient activating and dissolving method of rhodium powder

A rhodium powder, high-efficiency technology, applied in the high-efficiency activation and dissolution of rhodium powder, the dissolution of rhodium secondary resource materials, can solve the problems of low primary dissolution rate, long dissolution cycle, long cycle, etc., to achieve large unit equipment production capacity, equipment The effect of high production efficiency and low production cost

Pending Publication Date: 2020-06-19
康纳新型材料(杭州)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This type of method is activated to improve the solubility of rhodium, but there is a long cycle, the introduction of impurity elements, and the generation of hydrogen under acidic conditions have certain safety hazards.
[0021] The abov

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Take by weighing 10kg of pure rhodium powder (99.99%), 50g of gold powder and 30kg of hydrochloric acid with a concentration of 36% to 38%, place it in a glass reactor with a volume of 100L, start stirring, and feed Cl 2 , the flow rate is 80L / min, and the Cl 2 Circulation system, heat up to 105°C, stop feeding chlorine gas after 60 minutes of reaction, cool down to 80°C, keep warm at 80°C for 10 minutes, then start stirring, drop to room temperature, filter, wash filter residue with 100-500ml of pure water each time 5 Once, the washing liquid was merged into the filtrate to obtain 40.50L of filtrate. After testing, the filtrate contained Rh20.61%, about 245.55g / L, Au content of 0.8ppm, and rhodium dissolution rate of 99.45%. The weight of filter residue after drying is 105g, and its composition is rhodium and gold, according to the content of its measurement, then add people's rhodium powder and gold powder and hydrochloric acid respectively in proportion and carry out...

Embodiment 2

[0041] Take by weighing pure rhodium powder (99.99%) 10kg, gold powder 1000g and 50kg concentration be the hydrochloric acid of 36%~38%, be placed in the glass reactor that volume is 100L, start stirring, pass into Cl 2 , the flow rate is 25L / min, and the Cl 2 Circulation system, heat up to 60°C, stop feeding chlorine gas after 180 minutes of reaction, cool down to 112°C, keep warm at 112°C for 60 minutes, then start stirring, lower to normal temperature, filter, wash filter residue with 100-500ml of pure water each time 5 Once, the washing liquid was merged into the filtrate to obtain 54.70L of filtrate. After testing, the filtrate contained Rh15.9%, about 180.99g / L, Au content of 0.5ppm, and rhodium dissolution rate of 99.00%. The weight of filter residue after drying is 300g, and its composition is rhodium and gold, according to the content of its measurement, then add people's rhodium powder and gold powder and hydrochloric acid respectively in proportion and carry out nex...

Embodiment 3

[0043] Take by weighing pure rhodium powder (99.99%) 10kg, gold powder 500g and 40kg concentration be the hydrochloric acid of 36%~38%, place volume and be in the glass reactor of 100L, start stirring, pass into Cl 2 , the flow rate is 40L / min, and the Cl 2 Circulation system, heat up to 60°C, stop feeding chlorine gas after 70 minutes of reaction, keep the temperature at 110°C, keep warm at 110°C for 10 minutes, then start stirring, drop to room temperature, filter, wash the filter residue with 100-500ml of pure water each time 5 Once, the washing liquid was merged into the filtrate to obtain 46.20L of filtrate. After testing, the filtrate contained Rh18.61%, about 208.87g / L, Au content of 0.7ppm, and rhodium dissolution rate of 96.50%. Filter residue weight is 850g after drying, and its composition is rhodium and gold, according to the content of its measurement, add people's rhodium powder and gold powder and hydrochloric acid respectively in proportion again and carry out ...

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PUM

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Abstract

The invention discloses an efficient activating and dissolving method of rhodium powder. The rhodium powder and a hydrochloric acid solution are mixed in a certain ratio, the mixed solution is put ina reactor, a certain amount of activator gold powder is introduced, temperature is controlled at 60-112 DEG C, Cl2 is introduced and subjected to a reaction for 1-3 h, Cl2 is recycled in a dissolvingprocess, heat preservation is performed at a certain temperature for 10-90 min after Cl2 introduction is ended, the mixed solution is cooled to normal temperature and then is filtered, and a chlororhodic acid solution with purity higher than 99.95% and Rh content higher than 15% is obtained. The dissolution rate of rhodium is higher than 96%, Cl2 is recycled in the dissolving process, and the method has the characteristics that environmental protection property is good, the technological process is short, dissolving efficiency and dissolution rate are high, no new impurities are introduced basically, the obtained chlororhodic acid solution has high Rh content and high purity and the production cost is low.

Description

technical field [0001] The invention belongs to the field of metallurgy of non-ferrous metals, in particular to an efficient activation and dissolution method of rhodium powder, and is also applicable to the dissolution of rhodium secondary resource materials. Background technique [0002] The dissolving of known rhodium material has following several methods: [0003] Medium-temperature chlorination: Mix sodium chloride and rhodium-containing materials in proportion, and feed Cl at 600°C to 700°C 2 dissolve. This method is easy to realize industrialized production, but the dissolving cycle is long, the treatment volume at one time is small, the dissolving rate at one time is low, multiple times of dissolving are required, the equipment is difficult to seal, and the operating environment is relatively bad. [0004] Alkali fusion: Sodium hydroxide (barium hydroxide), sodium peroxide and rhodium-containing materials are mixed in a certain proportion and melted at high temper...

Claims

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Application Information

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IPC IPC(8): C22B11/06C22B7/00B01F1/00B01F3/22B01F15/06B01F23/80
CPCC22B11/06C22B11/042C22B7/007B01F21/02B01F21/10B01F23/808B01F35/90B01F2035/99B01F2101/45Y02P10/20
Inventor 王定军毛圣华
Owner 康纳新型材料(杭州)有限公司
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