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Method for synthesizing magnesium borate whisker by using bittern

A technology of magnesium borate crystal whiskers and bittern, which is applied in the field of synthesis of magnesium borate crystal whiskers, can solve the problems of affecting industrial production and high raw material cost, and achieves the effect of broad industrialization prospects and cost reduction.

Active Publication Date: 2009-06-17
TIANJIN SEA WATER DESALINATION & COMPLEX UTILIZATION INST STATE OCEANOGRAPHI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the sodium chloride, potassium chloride, and magnesium chloride raw materials used in this method all need to be chemically pure or high-grade industrial products, and there is a problem of high raw material cost, which affects its industrial production

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 2

[0028] Get 1.4 liters of bittern filtered in Example 1, 4 liters of washing liquid in Example 1, add 100 grams of sodium chloride, 231 grams of boric acid and 2 liters of water after mixing, start stirring, add 246 grams of sodium hydroxide while stirring , the stirring was stopped after 20 minutes, and spray drying was carried out to obtain a powder. Put the prepared powder in the crucible, place the prepared powder in the crucible, place the temperature in a programmed temperature rise furnace to 800°C at a rate of 10°C / min, react for 2.5 hours, and cool to room temperature to obtain the reaction Finished thing. Take out the completed reaction product, soak it in water, break it up, and then wash and filter it several times until the filtrate does not contain Cl - and SO 4 2- until. The obtained filter cake was put into an oven and dried to obtain 208 grams of white powder. The first washing contains a liquid with a higher concentration of flux, and the filtrate is save...

Embodiment 3

[0030] Get 1.4 liters of bittern filtered in Example 1, 4 liters of washing liquid in Example 2, add 100 grams of sodium chloride, 241 grams of boric acid and 2 liters of water after mixing, start stirring, add 246 grams of sodium hydroxide while stirring With 22 grams of magnesium borate seed crystals, the stirring was stopped after 20 minutes, and spray drying was carried out to obtain a powder. Put the prepared powder in the crucible, place the prepared powder in the crucible, place the temperature in a programmed temperature rise furnace to 850°C at a rate of 10°C / min, react for 3 hours, and cool to room temperature to obtain the reaction Finished thing. Take out the completed reaction product, soak it in water, break it up, and then wash and filter it several times until the filtrate does not contain Cl - and SO 4 2- until. The obtained filter cake was put into an oven and dried to obtain 222 grams of white powder. The first washing contains a liquid with a higher co...

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Abstract

The process of preparing magnesium borate crystal whisker with bittern includes the following steps: pre-treating bittern; compounding bittern with boric acid, sodium chloride, water, sodium hydroxide and crystal seed, and reaction to form suspension; spray drying the suspension to obtain powder; heating to 800-850 deg.c and reaction at the temperature for 2-3 hr; cooling, washing and drying to obtain magnesium borate crystal whisker. The process has the main components in bittern utilized, lowered magnesium borate crystal whisker producing cost, and wide industrial application foreground.

Description

technical field [0001] The present invention relates to magnesium borate (Mg 2 B 2 o 5 ) The synthetic method of whisker, particularly relate to and utilize bittern as the method for raw material synthetic magnesium borate whisker. Background technique [0002] Magnesium borate (Mg 2 B 2 o 5 ) whiskers are fibrous single crystals, which have the advantages of high strength, high modulus, high wear resistance, light weight, corrosion resistance and good thermal stability, and can be used as new material reinforcements for light metal materials, plastics, rubber, ceramics It can be widely used in automobile, electrical, electronic, mechanical, chemical and other fields in the products of composite materials. [0003] The magnesium borate whisker synthetic method of prior art comprises: 1) high-temperature vapor-phase synthetic method; 2) microwave solid-phase synthetic method; 3) hydrothermal-high-temperature synthetic method; 4) high-temperature dry solid-phase syntheti...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C30B29/22C30B29/62
Inventor 张旖王俐聪张家凯黄西平曹冬梅
Owner TIANJIN SEA WATER DESALINATION & COMPLEX UTILIZATION INST STATE OCEANOGRAPHI