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A kind of preparation method of highly dispersed barite

A barite, high dispersion technology, applied in chemical instruments and methods, nanotechnology for materials and surface science, grain processing, etc., can solve the problem of large amount of dispersant, poor dispersion effect of barite powder, Issues such as limiting the scope of use

Active Publication Date: 2021-03-12
湖南楚天钡业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0012] However, in the prior art, the dispersibility of barite powder is not good, which seriously limits its scope of use. In order to improve the dispersibility of barite, it is usually adopted to solve this problem by adding a dispersant, but generally Dispersants lack pertinence, and the dispersant effect on barite powder is not good, and even if the addition of dispersant can solve the problem of barite powder dispersion to a certain extent, the amount of dispersant is relatively large, and the higher amount of Dispersant can bring many undesired problems

Method used

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  • A kind of preparation method of highly dispersed barite
  • A kind of preparation method of highly dispersed barite
  • A kind of preparation method of highly dispersed barite

Examples

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Effect test

Embodiment 1

[0055]Weigh 100.5 g of natural crystalline powder (from Yi Tida), dried at 110 ° C for 45min at 110 ° C, and then placed in a high-speed mixing mixer, then add abrasive and formula (I The dispersing agent, the grinding medium is a mixture of water and ethanol (5: 1V / V), and the grinding medium is preferably 0.0 wt.%, The amount of dispersing agent is preferably based on the heavy crystal stone raw material meter 0.1. WT.%, using planetary ball milling or stirring, the rotational speed is preferably 300 r / min, grinding 40 min, drying to obtain a crystalline stone powder. The grain size and distribution of the powder were measured using the AS-3012 type aperture and specific surface area analyzer. The particle size and distribution of the powder were tested, and the average particle diameter of the crystalline stone powder was detected by the Malvin 3000 laser particle size gauge. 96nm, specific surface area is about 57.2m2 / g.

[0056]The abrasive crystal stone powder was further pr...

Embodiment 2

[0061]The crystalline powder particles obtained by Example 1 were surface modified, and the compound represented by formula (II) as a modifier, and the compound represented by formula (II) was prepared by the following method: in the reaction vessel, 2.00 G of the chroma braronofluorescellikacid added to 20 ml soCl2In the medium, refluxed for 2 hours, then 2.0 ml of 3-aminopropyltriethoxysilane and a THF solution containing 1.2 ml of triethylamine were added dropwise, the mixture was refluxed for 24 hours, and the solvent was evaporated in vacuo. In 30 ml of diethyl ether, filtered and evaporated, the compound of the formula (II) was 220 ° C. The modification method includes the steps of: 5.0 g of the crystalline powder powder in the round bottom flask in ice acetic acid, and 0.2 g as a surface modifier, the organosilicon compound shown in the formula (II) of the surface modifier, is used for ultrasound treatment for 30 min The colloidal suspension was then placed for 24 hours, and ...

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Abstract

The invention provides a preparation method of high-dispersion barite. The method comprises the following step: in the presence of a polymer dispersant, grinding a barite raw material to obtain baritepowder. By using the dispersant, the prepared barite powder has excellent fine granularity and very high dispersity, and has the advantages of good dispersity, high stability, high whiteness and thelike when being used for a coating.

Description

Technical field[0001]The present invention belongs to the field of inorganic material, and it relates to the preparation method of crystalline stone, and more particularly to a method of preparing highly dispersed heavy crystalline.Background technique[0002]The heavy crystal stone powder has better complications, modification, radiation protection, anti-radiation resistance, acid and alkali, is a very good filler of high-grade coatings, plastics, rubber, paper, high-grade glass and other products, has broad Development prospects.[0003]Natural heavy crystal stone has the characteristics of large density, low hardness, brittle, and chemical properties, non-magnetic, non-toxic, absorbing rays and rays, which have been widely used as fillers, have been widely used in oil drilling, rubber, coatings, plastics, Paper and other industries. my country is a large country, the annual output and export volumes, accounting for 60% of the world's total export volume. At present, the demand for he...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01F11/46B82Y30/00B82Y40/00B02C17/08B02C17/10C09D7/62
CPCB02C17/08B02C17/10B82Y30/00B82Y40/00C01F11/462C01P2004/64C08K9/02C08K9/06C08K2003/3045C08K2201/005C08K2201/006C09D7/62
Inventor 黄向阳彭国煌
Owner 湖南楚天钡业有限公司
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