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

A technology for silver iodide and platinum silver, which is applied in the field of wet process technology for separating and extracting platinum, silver and iodine

Active Publication Date: 2008-09-03
KUNMING GUIYAN PHARMA
View PDF0 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In a word, platinum-containing silver iodide slag will be produced, and the current recovery method is to discard iodine and reclaim platinum and silver

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for reclaiming platinum-silver-iodine form platinum-containing silver iodide slag

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Embodiment 1, invention described equipment and preparation thereof:

[0023] (1), get analyzed, dry 2000 grams of silver iodide slag containing platinum, slowly add 70000 milliliters of aqua regia, in figure 1 In the equipment shown, slowly heat up to 120°C, react for 3 hours, cool down, filter the silver chloride precipitate, and wash thoroughly; (2), filter the liquid at 0-5°C, slowly add 20% NaOH dropwise solution, to PH=7-8, filter the sucked elemental iodine, continue heating and concentrating the filtered solution to a small volume, cool and filter, add 100 grams of NH4CL solution to the filtrate, precipitate (NH4)2PtCL6, filter (NH4)2PtCL6 precipitate, and fully wash , dry and burn to obtain metallic platinum; (3), adjust the silver chloride precipitation in (1) to be alkaline, and reduce it with hydrazine hydrate to obtain metallic silver, the yield of platinum is 93%, the yield of iodine is 80%, and the silver The yield is 98%.

[0024] According to atomic a...

Embodiment 2

[0025] Embodiment 2, invention described equipment and preparation thereof:

[0026] (1), get analyzed, dried 1500 grams of silver iodide slag containing platinum, slowly add / into 5300 milliliters of aqua regia, in figure 1 In the equipment shown, slowly heat up to 120°C, react for 2 hours, cool down, filter the precipitated silver chloride, and wash thoroughly. (2) Slowly add 20% NaOH solution dropwise to the filter solution at 0-5°C until PH = 7-8, filter the sucked elemental iodine, continue heating and concentrating the filter solution to a small volume, cool and filter, add 75% of the filtrate Gram of NH4CL solution, precipitate (NH4)2PtCL6, filter (NH4)2PtCL6 precipitate, and fully wash, dry and burn to obtain metal platinum. (3), adjust the silver chloride precipitation of (1) to be alkaline, and obtain silver metal through reduction with hydrazine hydrate, the yield of platinum is 92%, the yield of iodine is 81%, and the yield of silver is 99.7%.

[0027] According t...

Embodiment 3

[0028] Embodiment 3, invention described equipment and preparation thereof:

[0029] (1), get analyzed, dried 3000 grams of platinum-containing silver iodide slag, slowly add / into 10000 milliliters of aqua regia, in figure 1 In the equipment shown, slowly heat up to 120°C, react for 3 hours, cool down, filter the precipitated silver chloride, and wash thoroughly. (2) Slowly add 20% NaOH solution dropwise to the filter solution at 0-5°C until PH = 7-8, filter the sucked elemental iodine, continue heating and concentrating the filter solution to a small volume, cool and filter, add 150 to the filtrate Gram of NH4CL solution, precipitate (NH4)2PtCL6, filter (NH4)2PtCL6 precipitate, and fully wash, dry and burn to obtain metal platinum. (3), the silver chloride precipitation of (1), is adjusted to alkalescence, and hydrazine hydrate reduction obtains metal silver, and the yield of platinum is 92%, the yield of iodine is 79%, and the yield of silver is 99.9%.

[0030] According t...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

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...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/00C22B3/06C22B11/00C01B7/14
CPCY02P10/20
Inventor 何键朱泽兵普绍平李学杰候树谦李永年
Owner KUNMING GUIYAN PHARMA
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap