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A kind of additive and application thereof for synthesizing tobermullite whiskers

A tobermullite and additive technology, which is applied in the direction of single crystal growth, crystal growth, single crystal growth, etc., to achieve the effect of expanding application fields, satisfying high crystallinity, and promoting application development

Active Publication Date: 2018-07-13
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Organic amines and their derivatives are preferred

Method used

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  • A kind of additive and application thereof for synthesizing tobermullite whiskers
  • A kind of additive and application thereof for synthesizing tobermullite whiskers
  • A kind of additive and application thereof for synthesizing tobermullite whiskers

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Effect test

Embodiment 1

[0033] The siliceous raw material adopts analytical pure reagent Na 2 SiO3 9H 2 O, calcareous raw material adopts quicklime. After the quicklime is digested, the surfactant dodecylamine is added according to the Ca / N molecular ratio of 1000, and then with Na 2 SiO 3 9H 2 O is mixed according to the liquid-solid ratio of 15ml / g and the calcium-silicon molar ratio of 1.0, adjust the pH value to 14 with caustic alkali, stir and mix well, put it into a high-pressure reactor, and use 150rpm at 200°C and 3.2MPa pressure The stirring speed was kept at constant temperature for 3 hours. After the reaction, the cooled slurry was filtered, washed and dried. XRD analysis shows that the main phase is tobermullite and a small amount of calcium silicate hydrate gel (CSH).

Embodiment 2

[0035] The siliceous raw material adopts fly ash, and the calcareous raw material adopts quicklime. After digesting the quicklime, add the surfactant dodecylamine according to the Ca / N molecular ratio of 100, then mix it with the fly ash according to the liquid-solid ratio of 15ml / g and the calcium-silicon molar ratio of 1.0, and adjust the pH value with caustic alkali 14. After stirring and mixing, put it into a high-pressure reactor, and react at a constant temperature of 100 rpm at a stirring speed of 100 rpm under a pressure of 180 ° C and a pressure of 2.5 MPa for 5 hours. After the reaction, the cooled slurry was filtered, washed and dried. XRD analysis shows that the main phase is tobermolite.

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Abstract

The invention relates to an additive for synthesizing tobermorite crystal whiskers and application of the additive, and belongs to the technical field of inorganic chemical material production. The additive is a surface active agent. The surface active agent is a derivative of an amino compoundor amino compound and contains 2-25 carbon atoms. The applied amine surface active agent is wide in resource and low in price, and the stable control over the morphology and structure of the tobermorite crystal whiskers can be achieved at low addition amount. The synthesized tobermorite crystal whiskers are high in product crystallinity and long-diameter ratio, are an excellent chemical raw material for producing a functional composite and can be used in the fields of building materials, metallurgy, chemical engineering, materials and the like.

Description

technical field [0001] The invention relates to an additive for synthesizing tobermullite whiskers and an application thereof, belonging to the technical field of inorganic chemical material production. Background technique [0002] Tobermolite (5CaO 6SiO 2 ·5H 2 O) is a calcium silicate hydrate mineral, due to the characteristics of small bulk density, low thermal conductivity, high dehydration temperature, good thermal stability, high temperature resistance and high strength, silicon hydrate with tobermolite as the main component Calcium acid insulation material has been widely used in kilns, equipment and pipeline reaction engineering in metallurgy, building materials, petrochemical and other industries. There are two main types of raw materials for synthesizing tobermullite whiskers, namely siliceous raw materials and calcareous raw materials. The morphology and performance of the stone whiskers are also different. The main reason is that in the process of synthesizi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C30B29/34C30B29/62C30B7/10
CPCC30B7/10C30B29/34C30B29/62
Inventor 李光辉彭志伟张元波姜涛曹鹏旭罗骏范晓慧杨凌志李骞徐斌张鑫陈许玲郭宇峰杨永斌甘敏孙虎邓博纳
Owner CENT SOUTH UNIV