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Method for preparing siderite under high temperature and high pressure

A high temperature and high pressure, siderite technology, applied in the application of ultra-high pressure process, chemical instruments and methods, iron compounds and other directions, can solve the problems of long reaction time, complex reaction, poor crystallinity of siderite, etc. Short time, simple operation process and good crystallinity

Inactive Publication Date: 2016-11-09
INST OF GEOCHEM CHINESE ACADEMY OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved in the present invention is: provide a kind of method that prepares siderite under high temperature and high pressure, to solve existing technology and adopt hydrothermal method to prepare siderite, the reaction time that exists is long, the reaction is complicated, the prepared siderite Problems such as poor ore crystallization degree

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  • Method for preparing siderite under high temperature and high pressure
  • Method for preparing siderite under high temperature and high pressure

Examples

Experimental program
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Effect test

Embodiment 1

[0049] Analytical pure ferrous oxalate dihydrate (FeC 2 o 4 2H 2 O) As a starting material, use a powder tablet press to compress ferrous oxalate dihydrate (about 0.30g) into a cylinder (Φ6mm×5mm), and wrap it with silver foil (0.025mm) to make a sample; As the pressure transmission medium, use a powder tablet press to press the sample into a NaCl salt column (Φ10mm×12mm) to complete the high-pressure assembly block. High voltage assembly block assembly method:

[0050] ① A circular through hole with a diameter of 14mm is drilled in the center of a 32×32mm pyrophyllite block;

[0051] ②A graphite heating furnace with an outer diameter of 14mm and an inner diameter of 10mm is placed inside the circular through hole of the pyrophyllite block;

[0052] ③ A sodium chloride cylinder containing a ferrous oxalate dihydrate cylinder is placed in the middle of the graphite heating furnace, and the top and bottom are blocked with pyrophyllite plugs with a diameter of 10mm.

[0053] S...

Embodiment 2

[0056] Analytical pure ferrous oxalate dihydrate (FeC 2 o 4 2H 2 O) As a starting material, use a powder tablet press to press ferrous oxalate dihydrate (about 0.30g) powder into a cylinder (Φ6mm×5mm), and wrap it with silver foil (0.025mm) to make a sample; As the pressure transmission medium, use a powder tablet press to press the sample into a NaCl salt column (Φ10mm×12mm) to complete the high-pressure assembly block. High voltage assembly block assembly method:

[0057] ① A circular through hole with a diameter of 14mm is drilled in the center of a 32×32mm pyrophyllite block;

[0058] ②A graphite heating furnace with an outer diameter of 14mm and an inner diameter of 10mm is placed inside the circular through hole of the pyrophyllite block;

[0059] ③ A sodium chloride cylinder containing a ferrous oxalate dihydrate cylinder is placed in the middle of the graphite heating furnace, and the top and bottom are blocked with pyrophyllite plugs with a diameter of 10mm.

[0...

Embodiment 3

[0063] Analytical pure ferrous oxalate dihydrate (FeC 2 o 4 2H 2 O) As a starting material, use a powder tablet press to compress ferrous oxalate dihydrate (about 0.30g) into a cylinder (Φ6mm×5mm), and wrap it with silver foil (0.025mm) to make a sample; As the pressure transmission medium, use a powder tablet press to press the sample into a NaCl salt column (Φ10mm×12mm) to complete the high-pressure assembly block. High voltage assembly block assembly method:

[0064] ① A circular through hole with a diameter of 14mm is drilled in the center of a 32×32mm pyrophyllite block;

[0065] ②A graphite heating furnace with an outer diameter of 14mm and an inner diameter of 10mm is placed inside the circular through hole of the pyrophyllite block;

[0066] ③ A sodium chloride cylinder containing a ferrous oxalate dihydrate cylinder is placed in the middle of the graphite heating furnace, and the top and bottom are blocked with pyrophyllite plugs with a diameter of 10mm.

[0067]...

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Abstract

The invention discloses a method for preparing siderite under high temperature and high pressure. The method comprises the following steps: 1, using analytically pure ferrous oxalate dihydrate as a starting material; 2, pressing the ferrous oxalate dihydrate powder into a cylinder by using a tablet pressing machine, and wrapping the cylinder into a sample by using silver foil; 3, grinding chloride sodium into powder which is more than 200 meshes, placing in an oven and drying for 2 hours at the temperature of 150 DEG C; 4, preparing a sodium chloride cylinder sample which contains a ferrous oxalate dihydrate cylinder in the step 2 by using the dried chloride sodium powder; 5, assembling the sample in a high-pressure synthesis and assembly block and placing in a six-side top large press to carry out a high-temperature and high-pressure reaction; 6, taking out the reacted sample, and removing the silver foil on the surface of the sample, thus obtaining the pure siderite. By adopting the method disclosed by the invention, the problems of long reaction time, complex reaction, poor crystallization degree of the prepared siderite and the like because the siderite is prepared by using a hydrothermal method in the prior art are solved.

Description

Technical field: [0001] The invention belongs to the field of functional material synthesis, in particular to a method for preparing siderite under high temperature and high pressure. Background technique: [0002] The issue of the earth's carbon cycle has been widely concerned, and the study of the deep carbon cycle is particularly important. In the interior of the earth, carbon mainly exists in the form of carbonate, iron carbide, diamond, etc., among which magnesite (MgCO 3 ) is considered to be the most stable main form of carbon storage under the temperature and pressure conditions of the lower mantle. Studies have shown that the presence of magnesite (MgCO 3 ) are often associated with siderite (FeCO 3 ) isotropic to form ferromagnesite (Mg 1-x Fe x CO 3 ), and the physical properties of ferromagnesite such as spin phase transition under high temperature and pressure are of great value to the study of lower mantle elasticity and seismic wave velocity; as an impor...

Claims

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Application Information

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IPC IPC(8): C01G49/00B01J3/06
CPCB01J3/06B01J2219/00051B01J2219/00162C01G49/00C01P2002/72C01P2002/77C01P2002/82
Inventor 梁文胡志明李和平
Owner INST OF GEOCHEM CHINESE ACADEMY OF SCI
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