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Preparation method of kaolin having high colloid index

A kaolin and colloidal price technology, applied in chemical instruments and methods, inorganic chemistry, non-metallic elements, etc., can solve problems such as difficult to meet the high colloidal price requirements of kaolin

Active Publication Date: 2013-03-20
茂名市茂群高岭土有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the colloidal price of ordinary kaolin is lower than 85ml / 15g of soil, while the petrochemical industry requires that the colloidal price of kaolin as a catalyst is higher than 90ml / 15g of soil. High colloidal value requirements for kaolin during cracking

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A preparation method of high colloidal price kaolin, comprising the following steps,

[0025] (1) Dispersion by pulping: dissolve and disperse kaolin in water, then add dispersant to fully stir and disperse to obtain base material, enhance the dispersibility of kaolin in water, improve gloss, improve coloring power and hiding power, improve color development and performance Toning property, prevent floating color, prevent flocculation, prevent sedimentation; the dispersant in this embodiment is one or more of sodium hexametasulfate, sodium pyrophosphate and organic polypropylene;

[0026] (2) Desanding and impurity removal: the base material is successively passed through the grit chamber and the spiral grading and desandering machine for desanding to remove coarse-grained impurities to obtain the primary pulp material;

[0027] (3) Bleaching treatment: transport the raw pulp material to the mixing tank, add sulfuric acid solution and sodium dithionite solution, adjust ...

Embodiment 2

[0032] A kind of preparation method of high colloidal price kaolin of the present embodiment comprises the following steps,

[0033] (1) Pulping and dispersion: dissolve and disperse kaolin in water, then add a dispersant to fully stir and disperse to obtain a base material; the dispersant in this example is one of sodium hexametasulfate, sodium pyrophosphate and organic polypropylene or two or more;

[0034] (2) Desanding and impurity removal: the base material is successively passed through the grit chamber and the spiral grading and desandering machine for desanding to remove coarse-grained impurities to obtain the primary pulp material;

[0035] (3) Magnetic separation to remove iron, using a magnet to absorb and remove the iron minerals from the primary slurry;

[0036] (4) Bleaching treatment: transport the raw material of the ore pulp after the magnetic separation and iron removal step to the stirring tank, add sulfuric acid solution and sodium dithionite solution, adj...

Embodiment 3

[0041] The difference between the preparation method of a high colloidal price kaolin in this example and Example 1 is that the step (4) of this example is modified with ammonia water, the mass percentage concentration of ammonia water is 10%, and the amount of ammonia water added is Add 0.15kg of ammonia water per ton of pulp concentrate, and the stirring time is 15min. Other steps and principles of this embodiment are the same as those of Embodiment 1, and will not be repeated here.

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PUM

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Abstract

The invention relates to the technical field of kaolin preparation, and particularly relates to a preparation method of kaolin having a high colloid index. The preparation method comprises the following steps: (1) pulping, and dispersing; (2) desanding; (3) blanching; (4) modifying with ammonia water: adding ammonia water of which the concentration is 10-29% in percentage by mass into the ore pulp concentrated material, and then thoroughly stirring for 15-25 minutes, wherein 0.1-0.35 kg of ammonia water is added into per ton of ore pulp concentrated material; and (5) washing and drying: circularly washing and dewatering the ore pulp concentrated material subjected to ammonia water modification in the step (4), and drying the washed and dewatered ore pulp concentrated material to obtain the kaolin having a high colloid index. According to the invention, the ammonia water is added into the ore pulp concentrated material to perform modification treatment, so that the hydrophilicity, dispersity and expandability of kaolin can be changed, thereby ensuring that the colloid index of the finally prepared kaolin is higher than 90ml / 15g. Thus, the prepared kaolin is especially suitable for being used as a catalyst for catalytic cracking reaction in the petrochemical industry.

Description

technical field [0001] The invention relates to the technical field of kaolin preparation, in particular to a preparation method of high colloidal price kaolin. Background technique [0002] In recent years, kaolin has gradually become a necessary mineral raw material for dozens of industries such as papermaking, ceramics, rubber, chemical industry, paint, medicine and national defense. Usually pure kaolin has high whiteness, soft quality, easy to disperse and suspend in water, good plasticity, high cohesiveness and excellent electrical insulation properties, and has good acid solubility, low cation exchange capacity, Good fire resistance and other physical and chemical properties. Kaolin is also widely used in the modern petrochemical industry, especially as a catalyst for catalytic cracking reactions. [0003] The colloidal value of kaolin refers to the mixing of kaolin and water in proportion and adding magnesium oxide. The volume of kaolin condensed into a gel is calle...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B33/40B01J21/16
Inventor 李勇华
Owner 茂名市茂群高岭土有限公司
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