Preparation of calcium carbonate complex particle

A technology of composite particles and calcium carbonate, which is applied in chemical instruments and methods, inorganic pigment treatment, fibrous fillers, etc., can solve the problems of insufficient coating of calcium carbonate surface, difficult calcium carbonate particles, long processing time, etc. Improvement, simple operating conditions, and the effect of lowering the pH value
CN101353486AInactive Publication Date: 2009-01-28SOUTH CHINA NORMAL UNIVERSITY
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Patent Information

Authority / Receiving Office
CN Β· China
Current Assignee / Owner
SOUTH CHINA NORMAL UNIVERSITY
Publication Date
2009-01-28
Estimated Expiration
Not applicable Β· inactive patent

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Abstract

The invention discloses a preparation method of calcium carbonate composite particles, comprising the following steps: water glass is added in calcium carbonate pulp with the consistency of 5 percent to 20 percent for mixing; the mixed pulp is heated to 80 to 90 DEG C; reaction is conducted under the stirring condition of 1000r / min to 1500r / min; the reaction time is 0.5 to 1 hour; a PH regulator is added to regulate the PH of the pulp to be 7 to 11; aging is conducted at the temperature of 80 to 90 DEG C after reaction and the aging time is 2 to 5 hours; drying is conducted after aging at the temperature of 120 to 140 DEG C; and the calcium carbonate composite particle is obtained when breaking after drying. The method adopts the PH regulator to better control the PH value change of the solution, can effectively control the SiO2 membrane forming rate to make the SiO2 evenly form membrane on the surface of the calcium carbonate. Water glass is hydrolyzed to form tightly bound hydrated silica layer on the surface of calcium carbonate, having the advantages of simple operation condition, compact structure of made calcium carbonate composite particle and strong acid resistance.
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Description

technical field

[0001] The invention relates to a preparation technology of calcium carbonate particles, in particular to a preparation method of calcium carbonate composite particles which can be widely used in various industries as inorganic fillers and the like. Background technique

[0002] Calcium carbonate has the characteristics of easy source of raw materials, low price, low toxicity, high whiteness, large filling capacity and good mixing and processing performance. It is widely used in rubber, paint, papermaking, plastics and other industries. It is an important inorganic filler. However, the surface of calcium carbonate has a strong polarity. When it is applied to those low-polarity polymers, surface modification is required to improve the filler-filler and filler-polymer effects, which is beneficial to the calcium carbonate in the polymer matrix. scattered. When commonly used reactive coupling agents, such as silane coupling agents and titanate coupling agents, ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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