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Method for preparing nano-level active calcium carbonate for rubber and plastic

An activated calcium carbonate, nano-scale technology, applied in the direction of calcium carbonate/strontium/barium, dyed low-molecular-weight organic compound treatment, dyed high-molecular-weight organic compound treatment, etc. The effect of saving energy, simple production process and stable product quality

Active Publication Date: 2011-03-23
CHANGZHOU CALCIUM CARBONATE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0018] In order to overcome the shortage of energy consumption in the production of nano-scale activated calcium carbonate by the existing carbonization method, the invention provides a preparation method of nano-scale activated calcium carbonate for rubber and plastics

Method used

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  • Method for preparing nano-level active calcium carbonate for rubber and plastic
  • Method for preparing nano-level active calcium carbonate for rubber and plastic
  • Method for preparing nano-level active calcium carbonate for rubber and plastic

Examples

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preparation example Construction

[0040] Such as figure 1 It is a transmission electron microscope photo, a method for preparing nanoscale active calcium carbonate for rubber and plastics, the method comprising the steps of:

[0041] a. Put calcium oxide and water into the paddle digester at a ratio of 1:3.5-5, and the calcium hydroxide suspension enters the coarse stock tank through a 100-200 mesh sieve, and the slurry rests in the coarse stock tank for 24-100 hours, After the static coarse pulp undergoes secondary hydrocyclone separation, it enters the pulping tank, and the pulp is blended in the pulping tank to a calcium hydroxide mass percentage concentration of 15-22;

[0042] b. The measured calcium hydroxide slurry enters the metering tank for metering;

[0043] c. According to the concentration of the calcium hydroxide slurry, inject the crystallization directing agent into the carbonization tower, stir for 5 to 50 minutes and then enter the carbonization tower;

[0044] d. At the initial stage of ca...

Embodiment 1

[0052] A method for preparing nanoscale active calcium carbonate for rubber and plastics, the method comprising the steps of:

[0053] a. Calcium oxide and water are entered into the paddle digester in a ratio of 1: 3.5, and the water can be tap water or treated nano-calcium carbonate production wastewater; the calcium hydroxide suspension enters the coarse stock tank through a 120 mesh sieve, The slurry was left standing in the coarse pulp pool for 24 hours, and the static crude pulp was subjected to secondary hydrocyclone separation and then entered into the slurry mixing tank, where the slurry was adjusted to a calcium hydroxide mass percentage concentration of 15;

[0054] b. The measured calcium hydroxide slurry enters the metering tank for metering;

[0055] c. According to the concentration of the calcium hydroxide slurry, inject a crystallization directing agent into the carbonization tower. The amount of the crystallization directing agent is adjusted according to the...

Embodiment 2

[0061] A method for preparing nanoscale active calcium carbonate for rubber and plastics, the method comprising the steps of:

[0062]a. Calcium oxide and water are entered into the paddle digester in a ratio of 1: 4.5. The water can be tap water or treated nano-calcium carbonate production wastewater, and the calcium hydroxide suspension enters the coarse stock tank through a 150 mesh sieve. The slurry was left standing in the coarse pulp pool for 30 hours, and the static crude pulp was subjected to secondary hydrocyclone separation and then entered into the slurry mixing tank, where the slurry was adjusted to a calcium hydroxide mass percentage concentration of 22;

[0063] b. The measured calcium hydroxide slurry enters the metering tank for metering;

[0064] c. According to the concentration of calcium hydroxide slurry, inject the crystallization directing agent into the carbonization tower. The amount is adjusted according to the quality index of the final product and th...

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Abstract

The invention belongs to the technical field of the preparation method of calcium carbonate, and particularly relates to a method for preparing nano-level active calcium carbonate for rubber and plastic. The method comprises the following steps of: a, introducing calcium oxide and water into a paddle-type slaker in proportion, leading a calcium hydroxide suspension into a rough pulp chest after sieving, keeping the slurry standing still in the rough pulp chest and carrying out secondary rotary fluid separation on the rough slurry standing still and then entering a size mixing tank; b, leadingthe measured calcium hydroxide slurry into a measuring tank for measurement; c, infusing crystallization guiding agent to a carbonizer according to the concentration of the calcium hydroxide slurry, stirring and entering the carbonizer; d, carbonizing in early stage; e, closing carbon dioxide and introducing the slurry in a boiled size tank; f, introducing the slurry in the boiled size tank in a three-level mixed-flow pump after combining by using a metering pump and a surface active agent metering pump, then entering a static-state mixer and finally entering a homogenizing tank; and g, filtering, drying, grinding and screening the slurry in the homogenizing tank. The nano-level active calcium carbonate for rubber and plastic refers to a cubic particle, and has normal appearance and good dispersibility.

Description

technical field [0001] The invention relates to the technical field of calcium carbonate preparation methods, in particular to a preparation method of nanoscale active calcium carbonate for rubber and plastics. Background technique [0002] At present, the production of nano-scale active calcium carbonate generally adopts the carbonization method, that is, the calcium hydroxide suspension reacts with carbon dioxide to generate calcium carbonate. The reaction equation is: [0003] Ca(OH) 2 +CO 2 =CaCO 3 +H 2 o [0004] The industrialized production methods are; bubbling carbonization with stirring, spray carbonization, and supergravity carbonization. [0005] The carbonization process is the formation process of calcium carbonate nanoparticles. In order to have a good application value, nano-calcium carbonate must be subjected to surface activation treatment, that is, after carbonization, the nano-calcium carbonate slurry is transported to the surface activation treatmen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09C1/02C09C3/10C09C3/08C01F11/18
Inventor 宗永波黄海平吴荣忠黄建龙
Owner CHANGZHOU CALCIUM CARBONATE
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