Method for enrichment of platinum in fluorine-containing spent platinum catalyst

A platinum catalyst and enrichment technology, applied in the field of platinum enrichment, achieves the effects of high yield, easy industrialization, and simple process

Active Publication Date: 2015-02-25
大城县荷丰有色金属有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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This method has not been reported in the literature review

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  • Method for enrichment of platinum in fluorine-containing spent platinum catalyst

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Experimental program
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Effect test

Embodiment 1

[0026] See the accompanying drawings, conditions: 1000g of fluorine-containing spent platinum catalyst, the amount of fluorine-fixing agent added is 0.4 times the weight ratio of fluorine-containing spent platinum catalyst, the amount of platinum trapping agent iron red is 0.5 times the weight ratio of fluorinated spent platinum catalyst, slagging The agent is lime and quartz, the addition amount is 10% and 15% of the weight ratio of the fluorine-containing spent platinum catalyst, the addition amount of the reducing agent is 10% of the weight ratio of the fluorine-containing spent platinum catalyst, and the addition amount of the binder water glass is 10% of the weight ratio of the fluorine-containing spent platinum catalyst. 0.5% by weight of the catalyst, mixed evenly, made into 5cm pellets with a ball forming machine, dried, and smelted at 1350°C for 1.5h in an electric arc furnace to obtain platinum alloy and smelting slag. During the smelting process, fluorine entered into...

Embodiment 2

[0028]See the accompanying drawings, conditions: 5000g of fluorine-containing spent platinum catalyst, the amount of fluorine-fixing agent added is 0.6 times the weight ratio of fluorine-containing spent platinum catalyst, the amount of platinum trapping agent iron black is 0.8 times the weight ratio of fluorine-containing spent platinum catalyst, and slagging The additives are lime and quartz, the addition amount of which is 15% and 10% by weight of the fluorine-containing spent platinum catalyst, the addition of the reducing agent is 8% of the weight ratio of the fluorine-containing spent platinum catalyst, and the addition of binder starch is 10% by weight of the fluorine-containing spent platinum catalyst. 0.5% of the weight ratio, mixed evenly, made into 5cm pellets with a ball forming machine, dried, and smelted at 1300°C for 2.0h in an electric arc furnace to obtain platinum alloy and smelting slag. During the smelting process, fluorine entered the slag; the obtained plat...

Embodiment 3

[0030] Refer to the accompanying drawings, conditions: 10000g of fluorine-containing spent platinum catalyst, the amount of fluorine-fixing agent added is 0.8 times the weight ratio of fluorine-containing spent platinum catalyst, and the amount of platinum trapping agent hematite concentrate added is 1.0 times the weight ratio of fluorine-containing spent platinum catalyst, The slagging agent is lime and quartz, the addition amount is 20% and 15% by weight of the fluorine-containing spent platinum catalyst, the added amount of the reducing agent is 6% by weight of the fluorine-containing spent platinum catalyst, and the addition amount of the binder starch is fluorine-containing spent platinum catalyst. 0.7% by weight of the platinum catalyst, mixed evenly, made into 5cm pellets with a pelletizing machine, dried, and smelted at 1350°C for 2.0h in an electric arc furnace to obtain platinum alloy and smelting slag. Fluorine entered the slag during the smelting process; the obtaine...

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Abstract

The invention discloses a method for enrichment of platinum in a fluorine-containing spent platinum catalyst. The method comprises the following steps of mixing a fluorine-containing spent platinum catalyst, a fluoride retention agent, a platinum trapping agent, a slagging agent, a reducer and a binder to obtain a uniform mixture, carrying out granulation by a granulator to obtain granules with 5cm, carrying out drying, carrying out melting by an electric-arc furnace at a temperature of 1300-1400 for 1-2h to obtain platinum alloy and melting slag, adding fluorine into the melting slag in melting, melting the platinum alloy by an intermediate frequency furnace, carrying out atomization powder injection to obtain fine platinum alloy particles, carrying out selective leaching of iron in the platinum alloy particles, and carrying out filtration and washing to obtain platinum richment which is platinum concentrate. The platinum concentrate has platinum content greater than 30%, a platinum enrichment ratio 25-35 times the original ratio and a platinum yield greater than 99.0% and is a high-quality raw material for platinum purification. The method has simple processes, a high platinum yield, a high enrichment ratio, environmental friendliness, a low cost and a good industrialization prospect.

Description

technical field [0001] The invention belongs to the field of rare metal metallurgy and relates to a method for enriching platinum from spent platinum catalysts containing fluorine. Background technique [0002] The exhausted platinum catalyst containing fluorine is an extremely rare platinum-containing secondary resource. Although the platinum content is about 2-3%, it is difficult to extract platinum from the exhausted catalyst. The reason is that the fluorine content is high, and the fluorine content reaches 8-15%. , the traditional oxidation roasting can remove fluorine well and effectively enrich platinum, but there is serious corrosion of equipment by fluorine, such as heating with silicon carbon rods or silicon molybdenum rods, without corroding the heating elements, the surrounding refractory materials are also corroded, The loss of platinum is serious; hydrogen fluoride corrodes reaction vessels and equipment in wet treatment, and the efficiency of defluorination is ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/00C22B11/00
CPCY02P10/20
Inventor 蹇祝明
Owner 大城县荷丰有色金属有限公司
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