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

Method for preparing ferrodolomite under high temperature and high pressure

A high-temperature, high-pressure, iron-dolomite technology is applied to the method of using atmospheric pressure to change substances chemically, the process of applying ultra-high pressure, chemical instruments and methods, etc., which can solve the problems of poor chemical stability, complicated operation process, Long reaction time and other problems, to achieve the effect of easy control of experimental conditions, complicated operation process and long reaction time

Inactive Publication Date: 2017-12-26
INST OF GEOCHEM CHINESE ACADEMY OF SCI
View PDF4 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a method for preparing iron dolomite under high temperature and high pressure, so as to solve the complicated operation process, long reaction time and the low purity and chemical stability of the current iron dolomite preparation method. Not good, easy to absorb water defects and other technical problems. At the same time, this method has the characteristics of simple experimental operation and easy control of experimental conditions.

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Analytical pure calcium carbonate, magnesium oxalate dihydrate (MgC 2 o 4 2H 2 O), ferrous oxalate dihydrate (FeC 2 o 4 2H 2O) powder and anhydrous oxalic acid as starting materials, according to stoichiometric molar ratio 0.5: (0.5-x): x: 0.3, x value 0.1, grind and mix evenly, use powder tablet press to mix the mixture (about 0.25g) Finally, it is pressed into a cylinder (Φ5mm×3mm), and the sample is stuffed into a platinum tube with a diameter of Φ5mm and a thickness of 0.1mm, and the two ends are sealed with a welding torch. Using h-BN as the pressure transmission medium, place the platinum-sealed sample in the h-BN tube: drill a Φ5mm hole in the center of the h-BN rod with a size of Φ10mm on the lathe to make the h-BN tube, and place the platinum-sealed sample Put it into the tube, and seal the two ends with h-BN sheets with a thickness of Φ5mm and a thickness of 2mm to complete the high-pressure assembly block. High voltage assembly block assembly method:

...

Embodiment 2

[0050] Analytical pure calcium carbonate, magnesium oxalate dihydrate (MgC 2 o 4 2H 2 O), ferrous oxalate dihydrate (FeC 2 o 4 2H 2 O) powder and anhydrous oxalic acid as starting materials, according to stoichiometric molar ratio 0.5: (0.5-x): x: 0.3, x value 0.1, grind and mix evenly, use powder tablet press to mix the mixture (about 0.25g) Finally, it is pressed into a cylinder (Φ5mm×3mm), and the sample is stuffed into a platinum tube with a diameter of Φ5mm and a thickness of 0.1mm, and the two ends are sealed with a welding torch. Using h-BN as the pressure transmission medium, place the platinum-sealed sample in the h-BN tube: drill a Φ5mm hole in the center of the h-BN rod with a size of Φ10mm on the lathe to make the h-BN tube, and place the platinum-sealed sample Put it into the tube, and seal the two ends with h-BN sheets with a thickness of Φ5mm and a thickness of 2mm to complete the high-pressure assembly block. High voltage assembly block assembly method: ...

Embodiment 3

[0057] Analytical pure calcium carbonate, magnesium oxalate dihydrate (MgC 2 o 4 2H 2 O), ferrous oxalate dihydrate (FeC 2 o 4 2H 2 O) powder and anhydrous oxalic acid as starting materials, according to stoichiometric molar ratio 0.5: (0.5-x): x: 0.3, x value 0.4, grind and mix evenly, use powder tablet press to mix the mixture (about 0.25g) Finally, it is pressed into a cylinder (Φ5mm×3mm), and the sample is stuffed into a platinum tube with a diameter of Φ5mm and a thickness of 0.1mm, and the two ends are sealed with a welding torch. Using h-BN as the pressure transmission medium, place the platinum-sealed sample in the h-BN tube: drill a Φ5mm hole in the center of the h-BN rod with a size of Φ10mm on the lathe to make the h-BN tube, and place the platinum-sealed sample Put it into the tube, and seal the two ends with h-BN sheets with a thickness of Φ5mm and a thickness of 2mm to complete the high-pressure assembly block. High voltage assembly block assembly method: ...

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 preparing ferrodolomite under high temperature and high pressure, which comprises the steps of grinding and uniformly mixing analytically pure calcium carbonate, magnesium oxalate dihydrate, ferrous oxalate dehydrate powder and anhydrous oxalic acid according to stoichiometric molar ratio; pressing an obtained mixture into a cylindrical shape by a tablet press; putting a cylindrical sample into a platinum tube, sealing the two ends with a welding gun; taking h-BN as a pressure transmitting medium, putting the platinum sealed sample into an h-BN tube; assembling the sample loaded in the h-BN tube in a high-pressure synthesis assembly block, putting the sample in a six-faced top large press for high temperature and high pressure reaction; taking out the reacted sample, opening the platinum tube by a diamond cutter, naturally airing to obtain the ferrodolomite. The method provided by the invention solves the defects that the present ferrodolomit e preparation method is complex in operation process and long in reaction time, and the obtained sample is low in purity, poor in chemical stability and easy to absorb water.

Description

Technical field: [0001] The invention relates to the field of mineral material synthesis, in particular to a method for preparing iron dolomite under high temperature and high pressure. Background technique: [0002] In recent years, the greenhouse gas CO 2 Entering the atmosphere, causing global warming has attracted widespread attention. Carbonate minerals are the largest carbon pool in the earth’s sphere, and their circulation in the earth system affects the global carbon cycle system. Therefore, the carbon in sedimentary rocks It is especially important to study the stability of salt minerals and the morphology of their existence. Calcite, magnesite and siderite are common carbonate minerals in sedimentary rocks. Due to the similar crystal structure of calcite, magnesite and siderite, they are often used in nature as calcite-magnesite-siderite three end members Formation of dolomite Ca 0.5 Mg 0.5-x Fe x CO 3 And exist, that is, calcium ions, magnesium ions and iron...

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): C01G49/00B01J3/06
CPCB01J3/062C01G49/009C01P2002/77
Inventor 梁文李和平李泽明尹远李瑞
Owner INST OF GEOCHEM CHINESE ACADEMY 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