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Preparation method of nano-scale tourmaline powder

A tourmaline powder, nano-level technology, applied in nanotechnology, chemical instruments and methods, climate sustainability, etc., can solve the problems of high energy consumption, high temperature calcination, complex process flow, etc., achieve low equipment requirements and reduce particle size. , the effect of simple process

Inactive Publication Date: 2012-06-13
HEBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The particle size of the tourmaline powder prepared by it is similar to that of the tourmaline powder prepared by the present invention, but its technological process is relatively complicated, it requires high processing conditions and high-temperature calcination, and consumes a lot of energy
[0005] 2. Large particle size and uneven distribution
The average particle size of the tourmaline produced by the manufacturing method of the ultrafine white tourmaline powder disclosed by CN 1473759A (publication date 2004.2.11) is 0.5 μm, and there is no specific particle size and distribution of d50, d90, d97 etc. , it is difficult to meet the needs of users

Method used

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  • Preparation method of nano-scale tourmaline powder
  • Preparation method of nano-scale tourmaline powder
  • Preparation method of nano-scale tourmaline powder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] (1) The beaker that 60ml water-alcohol mixture (1: 1V%) is housed is placed on the magnetic stirrer and stirs, and dispersively adds 5g ferrite (2.74 μ m) (produced by Henan Xixia Company), concentrated nitric acid 10g ( Mass percentage concentration 70%), 10g cetyltrimethylammonium bromide, stir until cetyltrimethylammonium bromide dissolves completely.

[0041](2) Put the configured tourmaline slurry obtained in the previous step into a 100ml reactor and put it into an oven for temperature-controlled hydrothermal reaction. The hydrothermal temperature is 300°C and the time is 20h.

[0042] (3) Filter the reacted tourmaline slurry, and wash the filter cake three times with deionized water and ethanol respectively.

[0043] (4) Drying: the filter cake obtained after washing and suction filtration is placed in an oven for drying at 80° C., and finally nano-sized tourmaline powder is obtained.

Embodiment 2

[0045] (1) A beaker with 60ml of water-alcohol mixture (1: 1V%) is placed on a magnetic stirrer to stir, and 5g of ferrite tourmaline (2.74 μm) (produced by Henan Xixia Company), 10g of concentrated hydrochloric acid (100% by mass) are added. Concentration 37%), sodium dodecylbenzenesulfonate 15g, stir until sodium dodecylbenzenesulfonate dissolves completely.

[0046] (2) Put the configured tourmaline slurry into a 100ml reactor and put it into an oven for hydrothermal reaction. The hydrothermal temperature is 200°C and the time is 36h.

[0047] (3) Filter the reacted tourmaline slurry, and wash with deionized water and ethanol three times respectively.

[0048] (4) Drying: the filter cake obtained after washing and suction filtration is placed in an oven to dry at 120°C.

Embodiment 3

[0050] (1) Place a beaker containing 60ml of water-alcohol mixture (1:1V%) on a magnetic stirrer, add 5g of ferrite (2.74μm), 10g of malic acid, N-ethyldiaminoethylglycine 10g, stir until 10g of N-ethyldiaminoethylglycine is completely dissolved.

[0051] (2) Put the configured tourmaline slurry into a 100ml reactor and put it into an oven for hydrothermal reaction. The hydrothermal temperature is 100°C and the time is 50h.

[0052] (3) Filter the reacted tourmaline slurry, and wash with deionized water and ethanol three times respectively.

[0053] (4) Drying: the filter cake obtained after washing and suction filtration is dried in an oven at 150°C.

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Abstract

The invention relates to a preparation method of nano-scale tourmaline powder. The method comprises the following steps of: (1) dispersing and pulping, namely adding commercially available micron-scale tourmaline powder, inorganic acid and surfactant into mixed solution of water and ethanol under a stirring condition, so as to obtain tourmaline size; (2) feeding into a kettle, namely carrying outtemperature control hydrothermal reaction on the obtained tourmaline size under the conditions that hydrothermal temperature is 100-300 DEG C and reaction time is 20-50 hours; (3) washing: firstly filtering reacted tourmaline size and successively washing with deionized water and ethanol three times; and (4) drying: driving a filter cake obtained by washing and leaching in a drying oven at the temperature of 80-150 DEG C, so as to obtain the nano-scale tourmaline powder finally. Compared with the traditional preparation method of tourmaline micropowder, the preparation method provided by the invention adopts a low-energy-consumption hydrothermal method for preparing the nano scale tourmaline powder. The preparation method prepared by the invention has the advantages of simple process, mild condition, low equipment requirement, low energy consumption, short period and the like.

Description

technical field [0001] The invention belongs to the field of inorganic non-metallic materials, in particular to a method for preparing nanoscale ultrafine tourmaline powder by applying a hydrothermal method. The main content of the invention is to use commercially available tourmaline powder (micron level) and acid and surfactant as main raw materials, and through hydrothermal reaction, tourmaline nano powder with particle size range of 50-70nm can be prepared. The present invention is to obtain tourmaline nano-powder with relatively uniform particle size through a simple process, which solves the shortcomings of existing technical methods such as complex process, high equipment requirements, and high price, and the prepared tourmaline powder has Infrared emissivity and negative ion release are significantly improved. Background technique [0002] Tourmaline is a kind of silicate mineral with ring structure characterized by boron and complex chemical composition. The genera...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B33/20B82Y40/00
CPCY02P20/10
Inventor 薛刚梁金生韩超王赛飞赵超越
Owner HEBEI UNIV OF TECH