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Viscosity reducer for improving viscosity of kaolin, and its preparation method

A technology of viscosity reducer and kaolin, which is applied in chemical instruments and methods, inorganic chemistry, non-metallic elements, etc., can solve the problems of high viscosity and poor fluidity of kaolin, and achieve good fluidity, reduce viscosity and improve fluidity

Active Publication Date: 2013-06-12
中国高岭土有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a viscosity reducer for improving the viscosity of kaolin and its preparation method, which solves the problems of poor fluidity and high viscosity of kaolin used in the papermaking industry

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1 Embodiment 3

[0024] Embodiment 1 ~ Embodiment 3: A kind of viscosity reducing agent and preparation method thereof for improving the viscosity of kaolin

[0025] Preparation method: according to the formula in Table 1, after weighing the three agents of sodium hexametaphosphate, sodium polyacrylate and borax according to their respective weight percentages, under stirring conditions, the sodium hexametaphosphate, sodium polyacrylate and borax were respectively mixed in the order of front and back. Add in the bucket that water is housed, add water to bucket after described three kinds of medicaments dissolve then, make the total solid content of described three kinds of medicaments in water be 8~20%, after stirring for 15~50 minutes, according to table Add sodium hydroxide dropwise to the barrel according to the formula of 1, then add methylene blue dropwise, and continue stirring until the mixture is uniform to obtain the finished product of the viscosity reducer. Embodiment 1~embodiment 3...

Embodiment 4 Embodiment 5

[0033] Embodiment four~embodiment five: A kind of viscosity reducing agent and preparation method thereof for improving the viscosity of kaolin

[0034] The formulation of the viscosity reducer is shown in Table 3. Both Example 4 and Example 5 prepared 100 tons of viscosity reducer for improving the viscosity of kaolin.

Embodiment 4

[0037] The preparation method of embodiment 4 and embodiment 5 viscosity reducer is the same as embodiment 1~embodiment 3.

[0038] Select the kaolin raw ore whose original viscosity concentration is 40% under the condition of 500 mPa·s, process and produce kaolin concentrate through the existing process, then add the viscosity reducer prepared in Example 4 to the prepared kaolin concentrate, and finally produce The obtained kaolin samples were sent to the technology department of Shanghai Jiangnan Paper Mill for product testing. The testing indicators are as follows:

[0039] Moisture is 0.61%; whiteness is 90.10%; pH is 3.68; loss on ignition is 14.35%; %; Fe 2 o 3 The content is 0.23%; Al 2 o 3 The content is 37.56%; SiO 2 The content is 45.36%; the viscosity concentration is 70.76% (under the condition of 500 mPa·s).

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PUM

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Abstract

The invention relates to a viscosity reducer for improving the viscosity of kaolin, and its preparation method. The viscosity reducer is composed of 18-35wt% of sodium hexametaphosphate, 55-75wt% of sodium polyacrylate, 5-11wt% of borax, 0.01-0.05wt% of sodium hydroxide and 0.005-0.015wt% of methyl blue. The preparation method of the viscosity reducer comprises the following steps: weighing sodium hexametaphosphate, sodium polyacrylate and borax according to the respective weight percentages, adding the above three medicines to a barrel provided with water in sequence under stirring, dissolving the three medicines, supplementing water to the barrel to make the total solid content of the three medicines in water in a range of 8-20%, stirring, adding sodium hydroxide in a dropwise manner to the barrel, adding methyl blue in a dropwise manner, and continuously stirring until uniform mixing in order to prepare the finished viscosity reducer. The viscosity reducer improves the fluidity of kaolin used in the papermaking industry and reduces the viscosity of kaolin on the premise that the whiteness of kaolin is not lower than 90% and the content of particles having granularities of below 2mum is not lower than 90%, and the viscosity of kaolin added with the viscosity reducer under a 500mPa.s condition can reach above 70.2%.

Description

technical field [0001] The invention relates to the field of deep processing of kaolin used in industries such as papermaking, paint and glue, and in particular to a viscosity reducer for improving the viscosity of kaolin and a preparation method thereof. The viscosity reducer can improve the fluidity of kaolin. Background technique [0002] Kaolin is one of the best white mineral pigments for the production of high-grade coated paper in the paper industry. Due to its good hydrophilicity, high fineness, high whiteness, strong inertness, and sheet and layered structure, it has excellent performance in paper applications. It has good printing performance, ink absorption, gloss and flatness, and is a high-quality raw material that cannot be replaced by other mineral fillers. [0003] my country is the first country to discover and use kaolin, which is rich in kaolin resources. However, due to different ore-forming conditions, domestic kaolin is mainly used in industries such a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B33/40
Inventor 张忠飞李心昌丁建方陈丽昆王炜文斐袁金刚杨洪军周方达
Owner 中国高岭土有限公司