Preparation method of prismatic biological calcium carbonate

A bio-calcium carbonate, prismatic technology, applied in the directions of fibrous filler, dyeing physical treatment, dyeing organosilicon compound treatment, etc., can solve the problems of poor matrix compatibility, uneven dispersion, poor surface modification effect, etc. The effect of good capacity, uniform dispersion and mild operating conditions

Inactive Publication Date: 2014-02-12
OCEAN RES CENT OF ZHOUSHAN ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The calcium carbonate whiskers prepared by these methods are all inorganic phases, which have poor surface modification effect, poor compatibility with the matrix, and uneven dispersion in the matrix.

Method used

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  • Preparation method of prismatic biological calcium carbonate
  • Preparation method of prismatic biological calcium carbonate

Examples

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preparation example Construction

[0021] The steps of the preparation method of prismatic biological calcium carbonate are as follows:

[0022] 1) After washing the shells with water to remove the residue, soak them in 0.05-0.75 mol / L sodium hydroxide solution, potassium hydroxide solution or sodium hypochlorite solution at 25-100 °C for 5-120 minutes, and wash to remove the cuticle;

[0023] 2) Soak the shells from which the horny layer has been removed in 0.3-5 mol / L sodium hydroxide solution or potassium hydroxide solution for 30-180 minutes at 50-200 °C, then wash with drum to separate the shell prismatic layer and shell nacre layer, Obtaining the shell prism layer, crushing the shell prism layer to 100-400 mesh;

[0024] 3) Mix the pulverized shell prismatic layer powder with water and grinding aid, and stir to obtain a slurry. The quality of the shell prismatic layer powder is 10% to 50% of the water mass, and the grinding aid The quality of the agent is 0.25% to 5% of the quality of the shell prism lay...

Embodiment 1

[0034] 1) After washing the mussel shells with water to remove the residue, soak them in 0.75 mol / L sodium hydroxide solution for 120 minutes at 25 °C, and wash with water to remove the cuticle;

[0035] 2) Soak the cuticle-removed sample in 5 mol / L sodium hydroxide solution at 50 °C for 180 minutes, wash with a drum to separate the shell prism layer and shell nacre layer to obtain the shell prism layer, and use the conventional crushing method to crush the shell The prism layer is crushed to 100 mesh;

[0036] 3) Mix the pulverized shell prism layer powder with water and grinding aid polyacrylic acid, and stir at a high speed to prepare a slurry; the quality of the shell prism layer is 10% of the water quality, and the grinding aid's The mass is 0.25% of the shell prismatic layer mass;

[0037]4) Using zirconia balls as the grinding media, put the grinding media with particle sizes of 0.5 mm, 1.5 mm, and 2.5 mm into the grinding bucket according to the mass ratio of 3:2:1. ...

Embodiment 2

[0041] 1) After washing the scallop shell with water to remove the residue, soak it in 0.75 mol / L potassium hydroxide solution for 5 minutes at 100°C, and wash with water to remove the cuticle;

[0042] 2) Soak the cuticle-removed sample in 0.3 mol / L potassium hydroxide solution at 200 °C for 30 minutes, wash with a drum to separate the shell prism layer and shell nacre layer to obtain the shell prism layer, and use the conventional crushing method to crush the shell The prism layer is crushed to 400 mesh;

[0043] 3) Mix the pulverized shell prism layer powder with water and the grinding aid sodium silicate, and stir at a high speed to obtain a slurry. The quality of the shell prism layer is 50% of the water quality, and the grinding aid The mass of the shell is 5% of the mass of the prismatic layer;

[0044] 4) Using ceramic balls as the grinding media, put the grinding media with particle diameters of 1 mm, 2 mm, and 3 mm into the grinding bucket according to the mass rati...

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Abstract

The invention discloses a preparation method of prismatic biological calcium carbonate. The preparation method comprises the following steps: washing shells to remove residues, soaking the shells in a sodium hydroxide solution, a potassium hydroxide solution or a sodium hypochlorite solution and washing the shells to remove stratum corneum; soaking the samples without the stratum corneum in a sodium hydroxide solution or a potassium hydroxide solution for 30-180 minutes, and washing the samples in a roller for separating prismatic layers of the shells from nacreous layers of the shells, thus obtaining the prismatic layers of the shells; mixing powder obtained by grinding the prismatic layers of the shells with water and a grinding aid and stirring the mixture at high speed to prepare pulp; grinding the prepared pulp and performing dehydration, washing and re-dehydration to obtain filter cakes; adding water to the washed filter cakes to prepare pulp and adding a surfactant in the stirring process; drying surface modified shell prismatic biological calcium carbonate and then breaking the dried surface modified shell prismatic biological calcium carbonate apart, thus obtaining the finished product. The shell prismatic biological calcium carbonate has natural oleophylic hydrophobicity and excellent mechanical property, has good compatibility with matrixes and is uniformly distributed in the matrixes.

Description

technical field [0001] The invention relates to the technical field of calcium carbonate filler preparation, in particular to a preparation method of prismatic biological calcium carbonate. Background technique [0002] The rapid development of shellfish farming has produced a large amount of shell waste. By 2010, the total output of shellfish farming in my country had reached 11.08 million tons, and the main cultured species were oysters, clams, scallops and mussels, etc. The output of oysters, clams, scallops and mussels reached about 364, 354, 141, 700,000 tons. In addition, my country's shellfish catches in 2009 and 2010 were about 950,000 and 910,000 tons. For a long time, a large number of shell resources have not been fully utilized, and they are dumped on the coast and beaches as waste, causing serious coastal pollution. Shell pollution has become an urgent environmental problem in coastal areas, and the environmental problems caused by the accumulation of shells a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09C1/02C09C3/04C09C3/12C09C3/08
Inventor 李海晏夏枚生邵庆均叶瑛肖金星陈涛
Owner OCEAN RES CENT OF ZHOUSHAN ZHEJIANG UNIV
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