Preparation method of nano calcium carbonate with low viscocity and high thixotropic property

A nano-calcium carbonate, high thixotropic technology, applied in nanotechnology, non-polymer adhesive additives, dyed low molecular organic compound treatment and other directions, can solve the problems of poor dispersion, low viscosity, high viscosity, achieve low viscosity, Great thixotropy, cost reduction effect

Inactive Publication Date: 2011-08-24
淄博嘉泽纳米材料有限公司
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  • Abstract
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  • Claims
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Problems solved by technology

[0004] The purpose of the present invention is to provide a method for preparing nano-calcium carbonate with low viscosity and high thixotropy, aiming at the disadvantages

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  • Preparation method of nano calcium carbonate with low viscocity and high thixotropic property

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[0015] Example 1:

[0016] The calcium carbonate ore is cleaned and then calcined at 1000°C. After the product is purified, digested and aged, water is added to prepare a 10% calcium hydroxide slurry, which is transferred to the membrane dispersion carbonization reactor, and the relative calcium hydroxide is added Sucrose 0.5% by weight of calcium hydroxide in suspension. Inject a mixture of carbon dioxide and air with a volume fraction of carbon dioxide of 30% for carbonization synthesis at 17°C by high-gravity method. When the pH drops to 6.8, continue to ventilate for 10 minutes to obtain nano-calcium carbonate slurry. Select a three-hour meter per 100ml A nano calcium carbonate slurry with an apparent sedimentation volume of 85-99ml. Water was added to adjust the weight fraction of the nano calcium carbonate slurry to 10%, and 1000 g of the nano calcium carbonate slurry was taken, and the temperature was raised to 80° C. and stirred for 10 minutes. Weigh 3g of carboxysteari...

Example Embodiment

[0017] Example 2:

[0018] The calcium carbonate ore is cleaned and then calcined at 1000°C. After the product is purified, digested and aged, water is added to prepare a 10% calcium hydroxide slurry, which is transferred to the membrane dispersion carbonization reactor, and the relative calcium hydroxide is added 0.5% beet sugar by weight of calcium hydroxide in suspension. A mixture of carbon dioxide and air with a volume fraction of carbon dioxide of 30% is introduced at 17℃ for carbonization synthesis by membrane dispersion method. When the pH drops to 6.8, continue to ventilate for 10 minutes to obtain nano-calcium carbonate slurry. Select a three-hour meter per 100ml A nano calcium carbonate slurry with an apparent sedimentation volume of 85-99ml. Water was added to adjust the weight fraction of the nano calcium carbonate slurry to 10%, and 1000 g of the nano calcium carbonate slurry was taken, and the temperature was raised to 80° C. and stirred for 10 minutes. Weigh 1.5...

Example Embodiment

[0019] Example 3:

[0020] The calcium carbonate ore is cleaned and then calcined at 1000°C. After the product is purified, digested and aged, water is added to prepare a 10% calcium hydroxide slurry, which is transferred to the membrane dispersion carbonization reactor, and the relative calcium hydroxide is added 0.5% maltose based on the weight of calcium hydroxide in the suspension. A mixture of carbon dioxide and air with a volume fraction of carbon dioxide of 30% is introduced at 17℃ for carbonization synthesis by membrane dispersion method. When the pH drops to 6.8, continue to ventilate for 10 minutes to obtain nano-calcium carbonate slurry. Select a three-hour meter per 100ml A nano calcium carbonate slurry with an apparent sedimentation volume of 85-99ml. Water was added to adjust the weight fraction of the nano calcium carbonate slurry to 10%, and 1000 g of the nano calcium carbonate slurry was taken, and the temperature was raised to 80° C. and stirred for 10 minutes....

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Abstract

The invention relates to a preparation method of nano calcium carbonate, and in particular relates to a preparation method of nano calcium carbonate with low viscocity and high thixotropic property. The method comprises the following steps: calcining, purifying and digesting the preferential limestone; controlling carbonization in a reactor to obtain the nano calcium carbonate rawstock; performing composite surface modification treatment on the rawstock by use of fatty acid or fatty acid derivatives and a coupling agent through a practical control process; and finally performing dehydration, drying, crushing and classification. The invention has the advantages that: the method is reasonable and reliable, ensures stable product quality, is favorable for continuous operation of production, and reduces the cost. The product produced by the method has low viscosity, high thixotropic property and good system compatibility and storage stability, and is applicable to the polymer systems such as polyurethane systems, epoxy systems, acrylic acid systems, amino resin sealants and the like.

Description

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Claims

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Application Information

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Owner 淄博嘉泽纳米材料有限公司
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