Method for reclaiming platinum-silver-iodine form platinum-containing silver iodide slag

Abstract

The invention relates to a method for recycling platinum, silver and iodine from platinum-containing silver iodide slag or silver iodide and a device for recycling platinum, silver and iodine. The method comprises the steps that: (1) putting platinum-containing silver iodide slag into a 20L reactor shown in the figure 1, slowly adding aqua fortis, slowly warming up to boil, and reacting under usual conditions; (2) cooling and filtering after reaction, adjusting the acidity of the filtrate by sodium hydroxide, separating simple substance iodine, filtering the simple substance iodine, concentrating the filtrate to get ammonia chloroplatinate sediment by adding ammonium chloride, burning to get metal platinum; and (3) getting silver chloride sediment from above sediment and reducing hydrazine hydrate to get metal silver. The key process is that platinum-containing silver iodide slag environment-friendly reacts with an oxidizer in a specific device, and platinum, silver and iodine are recycled at the same time. The invention provides a method for clean production, environment-friendly production, environment-polluted iodine recycle and platinum and silver recycle form platinum-containing silver iodide slag or silver iodide produced during platinum anticancer drugs production.

Description

technical field

[0001] The invention relates to the field of precious metal metallurgy, in particular to a wet process for separating and extracting platinum, silver and iodine from platinum-containing silver iodide waste. Background technique

[0002] Cancer has become one of the main threats to human health, and it is showing a clear upward trend. The cancer mortality rate in our country has accounted for the first place among all causes of death in cities. Therefore, our country has listed the research of anticancer drugs as the most important strategy for the development of new drugs. As one of the most serious issues, cancer has also become the leading cause of death in the United States. Therefore, the study of anticancer drugs is one of our long-term goals and tasks, and energy saving and emission reduction is an important research direction.

[0003] Since the discovery and clinical application of cisplatin’s anticancer activity in the late 1960s, despite its high t...

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