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A method and application for the differentiation and semi-quantitative analysis of different types of montmorillonite in geological samples

A technology for geological samples and quantitative analysis, applied in the fields of analyzing materials, using wave/particle radiation for material analysis, measuring devices, etc., can solve problems such as inability to effectively distinguish montmorillonite minerals, protect health and safety, and reduce the number of different samples. error, and the effect of improving the efficiency of experimental testing

Active Publication Date: 2022-04-22
INST OF GEOLOGY & GEOPHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The invention adopts the burning method to separate inorganic minerals in coal, and measures the content of montmorillonite in coal ash. Its measurement accuracy is better than that of the existing methods for directly measuring the content of montmorillonite in coal (such as XRD, etc.), and the operation method involved is simple. , but still cannot effectively distinguish between the two montmorillonite minerals

Method used

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  • A method and application for the differentiation and semi-quantitative analysis of different types of montmorillonite in geological samples
  • A method and application for the differentiation and semi-quantitative analysis of different types of montmorillonite in geological samples
  • A method and application for the differentiation and semi-quantitative analysis of different types of montmorillonite in geological samples

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Effect test

Embodiment 1

[0126] The method for distinguishing and quantitatively analyzing different types of montmorillonite in geological samples of the present invention is used to analyze loess samples in the Weinan area of ​​Shaanxi, and the analysis process is as follows figure 1 As shown, the specific method is as follows:

[0127] (1) Enrichment and extraction of clay minerals from Weinan loess samples. The sample was crushed with a geological hammer to below 100 mesh, 10 g of the sample was weighed and 200 ml of deionized water was added. Add 20ml of 30% hydrogen peroxide and react for 12 hours to remove the organic cement, add 40ml of 1mol / L acetic acid reagent and react for 6 hours to remove the carbonate cement. Centrifuge the sample from which organic matter and carbonate cements have been removed by 3600r / min for 5min, remove the supernatant, add 450ml of deionized water, and repeatedly elute until the solution becomes neutral and deflocculation occurs. According to the Stocks sediment...

Embodiment 2

[0142] Adopt the method of distinguishing and semi-quantitatively analyzing different types of montmorillonite in geological samples of the present invention to analyze the Eocene gypsum rock sedimentary samples in Xining Basin, the specific methods are as follows:

[0143] (1) Enrichment and extraction of clay minerals from sedimentary strata samples in the Xining Basin. The gypsum mudstone sample was crushed with a geological hammer to below 100 mesh, 50g of the sample was weighed and 200ml of deionized water was added. Add 20ml of 30% hydrogen peroxide and react for 12h to remove the organic cement. Add 0.32mol / L disodium ethylenediaminetetraacetic acid solution, 1L, boil for 24 hours, remove gypsum minerals, and release its cemented fine-grained components. Add deionized water again and repeat centrifugation, centrifuge at 3600r / min for 10min, elute until the solution is neutral, and deflocculation occurs. According to the Stocks sedimentation rule, the clay component wi...

Embodiment 3

[0158] Adopt the method of the present invention to analyze the fluvial and lacustrine sediment samples of Zhaotong Basin, Yunnan, the specific method is as follows:

[0159] (1) Enrichment and extraction of clay minerals from fluvial-lacustrine sediment samples in the Zhaotong Basin. The sample was crushed with a geological hammer, and 20 g of the sample was weighed and 200 ml of deionized water was added. Add 50ml of 30% hydrogen peroxide and react for 12h to remove the organic cement, add 80ml of 1mol / L acetic acid reagent and react for 6h to remove the carbonate cement. Centrifuge the sample from which organic matter and carbonate cements have been removed, and centrifuge at 3600r / min for 5min to remove the supernatant, add 450ml of deionized water, and repeatedly elute with water until the solution is neutral and deflocculation occurs. According to the Stocks sedimentation rule, the clay component with particle size less than 2 μm was suspended and extracted.

[0160] (...

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Abstract

The invention discloses a method and application for distinguishing and semi-quantitatively analyzing different types of montmorillonite in geological samples, comprising the following steps: enriching and extracting clay minerals from samples; preparing original oriented sheets before and after HCl dissolution and Mg 2+ and ethylene glycol saturated oriented sheet; carry out XRD test and semi-quantitative analysis before and after HCl dissolution; solve the relative content of all clay minerals including Na-montmorillonite and Ca-montmorillonite. The invention adopts the hydrochloric acid dissolution method to remove Ca-montmorillonite, realizes the distinction and quantitative analysis of Na-montmorillonite and Ca-montmorillonite, and provides a new approach for identification and quantitative analysis of different types of montmorillonite.

Description

technical field [0001] The invention belongs to the technical field of clay mineral analysis, in particular to a method and application for distinguishing and semi-quantitatively analyzing different types of montmorillonite in geological samples. Background technique [0002] Clay minerals widely exist on the earth's surface, and as non-metallic resources, they are widely used in various fields such as medicine, chemical industry, and environmental governance. At the same time, in the field of earth science, clay minerals are important weathering products of surface rock minerals, and their composition characteristics can reflect the climatic conditions and material sources of the formation period. Therefore, the study of clay minerals is an important way to explore the evolution history and development laws of paleoclimate, and it is also an important method to trace the provenance of sediments (Velde, 1995). [0003] The identification and quantitative analysis of differe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N23/207G01N23/20008
CPCG01N23/207G01N23/20008
Inventor 胡彬张春霞张晓燕
Owner INST OF GEOLOGY & GEOPHYSICS CHINESE ACAD OF SCI
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