A preparation method for light calcium carbonate by using a phase transfer-carbonization method

A light calcium carbonate, phase transfer technology, applied in calcium carbonate/strontium/barium, nanotechnology for materials and surface science, nanotechnology, etc., can solve the problem of low production efficiency, wide particle size distribution, and long process time. and other problems to achieve the effect of increasing concentration, improving production efficiency and simple process

CN103387254AActive Publication Date: 2013-11-13HEFEI UNIV OF TECH

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Patent Information

Authority / Receiving Office: CN · China
Current Assignee / Owner: HEFEI UNIV OF TECH
Publication Date: 2013-11-13

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Abstract

The invention discloses a preparation method for light calcium carbonate by using a phase transfer-carbonization method. Firstly, crude quicklime slurry is converted into a soluble calcium ion solution through a phase transfer reaction. Then, CO2 gas is fed into the soluble calcium ion solution and the calcium carbonate is obtained by precipitation and separation. According to the preparation method, in a phase transfer reaction process, calcium in the crude slurry is transferred into a liquid phase in forms of calcium ions, thereby achieving effective separation of the calcium ions from insoluble impurities in the crude slurry. The preparation method has advantages of simple technology, low production cost, high purity and uniform shapes and appearances of the CaCO3 produced, and the like. The preparation method can be applied for industrial production.

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Description

1. Technical Field

[0001] The invention relates to a method for producing nano light calcium carbonate, specifically a method for preparing light calcium carbonate by a phase transfer-carbonization method. The crude quicklime slurry is purified and then carbonized to produce high-quality nano light Calcium carbonate. 2. Background technology

[0002] Light calcium carbonate, also known as precipitated calcium carbonate, or PPC for short, is mainly prepared from limestone as raw material through roasting, digestion, carbonization, and drying processes. Light calcium carbonate has been used as an extremely versatile industrial filler for more than 100 years. It is now widely used in papermaking, plastics, rubber, coatings, inks, adhesives, daily chemicals, food, medicine, feed, chemical building materials and Sealing materials and other industries. At present, the total output of calcium carbonate in the world is about 80 million tons per year (including heavy and light calcium c...

Claims

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