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A method for preparing saponite crystals under hydrothermal conditions

A saponite and crystal technology, which is applied in the field of preparing saponite crystals under hydrothermal conditions, can solve the problems of saponite artificial synthesis, poor safety and operability, high impurity content of layered clay catalysts, and limited application and development. Achieve the effects of easy control of experimental conditions, better application performance, and convenient raw material acquisition

Active Publication Date: 2021-04-02
NORTHEASTERN UNIV LIAONING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The reserves of natural saponite in nature are very low, and there are many types of impurities, and its composition varies with different origins. The layered pillar clay catalyst has high impurity content, low crystallinity, complex isomorphic substitution, and difficult to adjust acidity. Limit the application and development of this type of material
[0004] The safety and operability of the artificial synthesis of saponite reported so far are poor, and the preparation process is difficult, or according to the theoretical structural formula of saponite, it is fed stoichiometrically, crystallized at a certain temperature for a certain period of time, and there is a problem of secondary pollution.

Method used

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  • A method for preparing saponite crystals under hydrothermal conditions
  • A method for preparing saponite crystals under hydrothermal conditions

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Prepare an acid solution with a pH of 5.5-6.5 at room temperature for later use; put the acid solution and the amphibole particles after removal of impurities into a high-temperature airtight container at the same time, and let it stand for 10 minutes at room temperature to ensure that the amphibole in different experimental groups The time for initial acidification was the same. Heat the airtight container containing the pretreated sample to 150°C for 5 to 10 days, so that the ions in the hornblende are fully dissolved and separated, and then precipitate on the surface of the hornblende to obtain saponite crystal nuclei; close after the holding time Heating system, let the airtight container cool down to 100°C, place it in a well-ventilated place and let it stand for 2 to 3 hours, let it cool down to room temperature naturally, this process can make the saponite crystal fully grow and exist stably. The precipitate was fully washed with deionized water and then dried at...

Embodiment 2

[0029] Prepare an acid solution with a pH of 5.5-6.5 at room temperature for later use; put the acid solution and the amphibole particles after removal of impurities into a high-temperature airtight container at the same time, and let it stand for 10 minutes at room temperature to ensure that the amphibole in different experimental groups The time for initial acidification was the same. Heat the airtight container containing the pretreated sample to 210°C for 5 to 10 days, so that the ions in the hornblende are fully dissolved and precipitated on the surface of the hornblende to obtain saponite crystal nuclei; close after the holding time Heating system, let the airtight container cool down to 100°C, place it in a well-ventilated place and let it stand for 2 to 3 hours, let it cool down to room temperature naturally, this process can make the saponite crystal fully grow and exist stably. The precipitate was fully washed with deionized water and then dried at 50°C for about 30 ...

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Abstract

The invention belongs to the technical field of preparation of clay mineral crystals, and particularly relates to a method for preparing saponite crystals under hydrothermal conditions. The technicalscheme of the invention is as follows: a method for preparing saponite crystals under hydrothermal conditions comprises the following steps: (1) preparation of a solution; (2) pulverization and impurity removal for a raw material; (3) pretreatment; (4) constant-temperature nucleation; (5) cooling crystallization; and (6) washing and drying. The method for preparing saponite crystals under hydrothermal conditions has the beneficial effects that a large amount of pure nano-scale saponite crystals are obtained by using widely existing hornblende as the raw material, thereby reducing the production cost of saponite. Reduction in the use of chemical reagents in conventional soapstone preparation avoids the occurrence of a potential problem of environmental pollution. Unique excellent performance of crystal materials can broaden the resource utilization of saponite minerals.

Description

technical field [0001] The invention belongs to the technical field of clay mineral crystal preparation, and in particular relates to a method for preparing saponite crystal under hydrothermal conditions. Background technique [0002] Soapstone is a kind of smectite clay mineral, which is a three-octahedral layered cationic clay mineral. Compared with dioctahedral montmorillonite, saponite has higher thermal stability and stronger acidity, and is a more ideal layered clay matrix material. Due to the unique structural characteristics of saponite, it has strong cation exchange and catalytic properties, and can be widely used in the fields of catalysis, adsorption and medicine. It can also prepare soapstone composite materials, which are also widely used in the fields of chemical industry and environmental treatment. [0003] The reserves of natural saponite in nature are very low, and there are many types of impurities, and its composition varies with different origins. The ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B33/40
CPCC01B33/40C01P2004/01C01P2006/80
Inventor 黄菲黎永丽张志彬赵福德刘开君闫莹灿安佰高
Owner NORTHEASTERN UNIV LIAONING
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