Check patentability & draft patents in minutes with Patsnap Eureka AI!

Process for Extracting and Separating Platinum Group Metals from Waste Catalysts

A technology of waste catalysts and platinum group metals, applied in the direction of improving process efficiency, etc., can solve the problems of large differences in grades and properties, achieve efficient extraction, simplify the process flow, and solve the effects of complex recycling principles

Active Publication Date: 2022-04-26
甘肃有色冶金职业技术学院
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Compared with the development and utilization of secondary platinum group metal resources, secondary resources of platinum group metals are relatively scattered, with wide sources, various types, and large differences in grades and properties. Such enrichment methods cannot effectively deal with the secondary resources of platinum group metals. Therefore, the development of technology research and development for the comprehensive utilization of secondary resources of platinum group metals is of great significance to alleviate the shortage of precious metal resources in my country.

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
  • Process for Extracting and Separating Platinum Group Metals from Waste Catalysts
  • Process for Extracting and Separating Platinum Group Metals from Waste Catalysts
  • Process for Extracting and Separating Platinum Group Metals from Waste Catalysts

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0043] Please refer to the attached figure 1 As shown, the technology for extracting and separating platinum group metals in a kind of spent catalyst provided by the invention comprises the following steps:

[0044] ⑴ Pretreatment

[0045] Take the waste catalyst, carry out crushing, roasting, pre-soaking treatment, and then separate the liquid and solid, put the leaching residue in a constant temperature drying box for heat preservation treatment, and obtain the pretreatment material; among them, the crushing is to crush the waste catalyst and put it in a grinder Grinding treatment, grinding to 40-300 mesh, roasting is roasting at 300-700 ° C for 2 hours, pre-soaking treatment is in hydrochloric acid with a concentration of 5mol / L, and the spent catalyst powder after roasting is in a liquid-solid ratio of 6: 1. Leach for 2 hours at a temperature of 85°C, heat preservation treatment is to control the temperature in a constant temperature drying oven at 100°C, and hold for 4 h...

experiment example

[0064] 1. Determination of the residual rate of various metals in the pre-soaking treatment of spent catalysts

[0065] Experimental principle: In addition to platinum group metals, spent catalysts also contain a large amount of MgO, A 2 lO 3 and SiO 2 These substances will reduce the leaching efficiency during the leaching process of platinum group metals and affect the recovery rate and purity of platinum group metals. Therefore, before the leaching of the platinum group metals, the spent catalyst is pre-soaked, and most of the soluble metal oxides are dissolved in the liquid solution. After the liquid-solid separation, the platinum group metals remain in the solid slag.

[0066] Experimental equipment: constant temperature drying oven, model YHG-300BS; disc vacuum filter, model RK / IL-240-120. of,

[0067] Experimental method: After the spent catalyst is roasted, it is pre-soaked with hydrochloric acid. The concentration of hydrochloric acid is 5 mol / L, the liquid-solid ...

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

PropertyMeasurementUnit
purityaaaaaaaaaa
Login to View More

Abstract

The invention discloses a process for extracting and separating platinum group metals from waste catalysts, and belongs to the technical field of waste catalyst reuse. The steps included in the process are: ⑴ pretreatment; ⑵ leaching treatment; ⑶ separation treatment; ⑷ refining treatment. Based on the hydrometallurgical process, the present invention uses waste automobile exhaust catalysts as raw materials, sequentially separates and extracts metal palladium, platinum, and rhodium through multi-step treatment, and the extraction rate is as high as 99%, and efficiently extracts platinum group metals at the same time , simplifies the technological process, and solves the problems of complex principle and long technological process of the existing hydrometallurgical process for secondary resource recovery and utilization of precious metals.

Description

technical field [0001] The invention belongs to the technical field of recycling waste catalysts, in particular to a process for extracting and separating platinum group metals from waste catalysts. Background technique [0002] Platinum group metals, also known as platinum group elements, include platinum (Pt), palladium (Pd), osmium (Os), iridium (Ir), ruthenium (Ru), and rhodium (Rh). Platinum group metals not only have similar physical and chemical properties, but also have their own characteristics. Together with gold and silver, they are called "noble metals". Their common characteristics are that except for osmium and ruthenium, which are steel gray, the rest are silver white, with high melting point, high strength, stable electric heat, high resistance to spark erosion, excellent corrosion resistance, strong high temperature oxidation resistance and catalytic performance. Good activity. Platinum group elements have high temperature resistance and corrosion resistan...

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 Patents(China)
IPC IPC(8): C22B7/00C22B11/00C22B3/06C22B3/34C22B3/38C22B3/44
CPCC22B11/048C22B7/007C22B3/44C22B3/302C22B3/34C22B3/3846Y02P10/20
Inventor 徐兴莉
Owner 甘肃有色冶金职业技术学院
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

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

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com