Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Method for detecting trace elements in pyrite

A technology for medium and trace elements and detection methods, which is used in measurement devices, preparation of test samples, instruments, etc., can solve problems such as unreported and unclear, and achieve good adsorption effect and increase acid resistance.

Active Publication Date: 2020-07-14
INST OF GEOLOGY & GEOPHYSICS CHINESE ACAD OF SCI
View PDF15 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, whether PUF can be used as a special adsorbent for iron to separate trace transition metal elements from pyrite remains unclear
Furthermore, the detection of trace elements in iron-rich geological samples after matrix removal by PUF has never been reported before.

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 detecting trace elements in pyrite
  • Method for detecting trace elements in pyrite
  • Method for detecting trace elements in pyrite

Examples

Experimental program
Comparison scheme
Effect test

preparation example 1

[0044] Preparation Example 1 Preparation of Modified PUF

[0045] Put 80g of polytetrahydrofuran, 10g of 2-butene-1-thiol, 20g of propylene thiol, 5g of 1,4-butanediol, and 2g of water into the foaming machine and stir to obtain component A, add 80g of MDI and 40g of crude MDI 1. 20 g of p-toluenesulfonyl isothiocyanate, stirred evenly, and foamed at 37° C. for 4 hours to obtain a modified PUF.

preparation example 2

[0046] Preparation example 2 Preparation of modified PUF / peptidoglycan complex

[0047] S1: Put 1 g of the modified PUF prepared in Preparation Example 1 into 100 mL of hydrochloric acid with a concentration of 4 moL / L, and heat the reaction at 90° C. for 4 hours to hydrolyze the bond between the amino group and the isocyanate group to release the amino group. Expose the amino group on the surface to form a modified PUF-NH 2 , dried for later use;

[0048] S2: Use ultrapure water to prepare an aqueous peptidoglycan solution with a concentration of 60g / L, and prepare the modified PUF-NH prepared in the previous step 2 About 1g was put into 100mL of peptidoglycan aqueous solution, heated to 40°C, 15mL of glutaraldehyde solution with a mass concentration of 25% was added dropwise, and the reaction was continued for 24 hours;

[0049] S3: Squeeze out the water from the PUF prepared in the previous step, wash it repeatedly with water for 5 times, and dry it to obtain a modified P...

Embodiment 1

[0056] Trace element detection in the pyrite of embodiment 1

[0057] The purpose of the test: After the modified PUF adsorbs the iron matrix, the difference between the detection results of trace elements in pyrite and the detection results of TRU resin method is compared.

[0058]Experimental method: Accurately weigh 10.02mg of pyrite 17PY-02, put it into a 7mL Savillex PFA vial, use 0.2mL 22M HF, 0.9mL 16M HCl and 0.3mL 14M HNO 3 Heat and dissolve the sample on a hot plate at 150°C for 24 hours, then slowly heat to evaporate HF after cooling, then add 3mL of 8.5M HCl, seal it, heat it on a hot plate at 120°C for 30 minutes to completely dissolve, cool Finally, the sample was transferred to a centrifuge tube using 8.5M HCl solution to make its volume reach 10 mL, and it was weighed accurately. Take 1mL of the sample solution and transfer it to a 50mL volumetric flask, and dilute to the mark with ultrapure water, and measure the iron content in the solution by ICP-OES;

[0...

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 discloses a method for detecting trace elements in pyrite, which comprises the following steps of adsorbing an iron matrix in pyrite by using modified polyurethane foam, determining theadsorption efficiency of the modified polyurethane foam to the iron matrix by ICP-OES, and detecting the content of the trace elements by ICP-MS and ICP-OES. The modified polyurethane foam provided bythe invention is polyurethane foam modified by isothiocyanate and / or mercaptan, has high adsorption rate on an iron matrix in the pyrite, is beneficial to recovery of trace elements in the pyrite, and enables the recovery rate of 17 trace elements in the pyrite to be 95-103%. The modified polyurethane foam provided by the invention has a specific adsorption effect on an iron matrix, and is high in adsorption capacity and resistant to acid, so that the purpose of rapidly, accurately and accurately detecting trace elements in pyrite is achieved.

Description

technical field [0001] The invention belongs to the technical field of geochemistry, and specifically relates to a method for removing iron matrix in pyrite through modified polyurethane foam, and then detecting trace elements in pyrite through ICP-MS and ICP-OES methods. Background technique [0002] Trace element geochemistry is one of the very active subdisciplines in the development of modern geochemistry, and it is an indispensable part of contemporary geochemical research. Its research content includes the distribution of trace elements in the earth (including some celestial bodies) and its subsystems, chemical action and chemical evolution, rock-forming and mineralization process and mechanism research. [0003] Pyrite (FeS 2 ) is the most abundant sulfide in the Earth's crust, and it is also the main component of hydrothermal mineralization in various ore systems, including porphyry copper deposits, volcanic origin massive sulfide deposits, iron oxide-copper-gold de...

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): G01N1/40G01N21/73G01N27/62C08G18/76C08G18/77C08G18/38C08G18/67C08G18/48C08G18/32C08G18/66C08J9/36C08J9/08C08G101/00G01N27/626
CPCG01N1/405G01N21/73G01N27/62C08G18/7671C08G18/775C08G18/3876C08G18/675C08G18/4854C08G18/3206C08G18/6674C08J9/36C08J2375/08C08G2110/0083
Inventor 刘艳红薛丁帅张丹萍
Owner INST OF GEOLOGY & GEOPHYSICS CHINESE ACAD OF SCI
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com