A kind of method of synthesizing bismuth oxychloride pearlescent pigment

A pearlescent pigment, bismuth oxychloride technology, applied in chemical instruments and methods, bismuth compounds, inorganic chemistry, etc., can solve the problems of difficult wastewater treatment, high reaction temperature, high energy consumption, etc., to avoid surfactants and impurity ions The effect of introduction, good gloss and strong controllability

Active Publication Date: 2016-01-13
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method usually requires a higher reaction temperature and consumes a lot of energy. At the same time, due to the use of the surfactant cetyl ammonium chloride, the cost is high and the wastewater treatment is difficult.

Method used

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  • A kind of method of synthesizing bismuth oxychloride pearlescent pigment
  • A kind of method of synthesizing bismuth oxychloride pearlescent pigment
  • A kind of method of synthesizing bismuth oxychloride pearlescent pigment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Weigh 0.631g (2mmol) BiCl 3 Dissolve in 50mL hydrochloric acid with a concentration of 1mol / L to make solution A; weigh 25mmol NaOH and dissolve it in 50mL deionized water to make solution B; add 50mL deionized water to a 250mL three-necked flask, and adjust the pH with concentrated hydrochloric acid to 1, and the temperature was raised to 70°C; under magnetic stirring, simultaneously add solution A and solution B into the three-necked flask, wherein, the addition rate of solution A was 1 mL / min, and the addition rate of solution B was 200 μL / min, after solution A was added After completion, continue to add solution B at a constant rate until the reaction is completed; filter the reaction mixture, wash with deionized water, and dry at room temperature to obtain the finished product of flake bismuth oxychloride pearlescent pigment. The product yield is 96%, and the purity is 99.9%.

[0029] figure 2 The scanning electron micrograph of finished product is made for this...

Embodiment 2

[0031] Weigh 0.946g (3mmol) BiCl 3 Dissolve in 50mL hydrochloric acid with a concentration of 1mol / L to make solution A; weigh 25mmol NaOH and dissolve it in 50mL deionized water to make solution B; add 50mL deionized water to a 250mL three-necked flask, and adjust the pH with concentrated hydrochloric acid to 1, and heat up to 70°C; under magnetic stirring, add solution A and solution B at the same time, wherein, solution A is added at a rate of 1mL / min, and solution B is added at a rate of 200μL / min. After solution A is added, continue at a constant rate Add solution B until the reaction is complete; filter the reaction mixture, wash with deionized water, and dry at room temperature to obtain the finished product of flaky bismuth oxychloride pearlescent pigment. The product yield is 96%, and the purity is 99.9%.

Embodiment 3

[0033] Weigh 1.261g (4mmol) BiCl 3 Dissolve in 50mL hydrochloric acid with a concentration of 1mol / L to make solution A; weigh 25mmol NaOH and dissolve it in 50mL deionized water to make solution B; add 50mL deionized water to a 250mL three-necked flask, and adjust the pH with concentrated hydrochloric acid to 1, and heat up to 70°C; under magnetic stirring, add solution A and solution B at the same time, wherein, solution A is added at a rate of 1mL / min, and solution B is added at a rate of 200μL / min. After solution A is added, continue at a constant rate Add solution B until the reaction is complete; filter the reaction mixture, wash with deionized water, and dry at room temperature to obtain the finished product of flaky bismuth oxychloride pearlescent pigment. The product yield is 95%, and the purity is 99.9%.

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Abstract

The invention relates to a method for compositing bismuth oxychloride pearlescent pigment. The method comprises the steps of taking bismuth inorganic salt as raw material, preparing bismuth oxychloride pearlescent pigment through the hydrolysis of bismuth inorganic salt in aqueous solution, dissolving the bismuth inorganic salt into diluted acid solution, feeding the solution into acidulated deionized water at a certain speed, meanwhile feeding aqueous alkali and acid produced during the reaction process into the solution, so as to maintain the pH value of a reaction system, and filtering, washing and drying on reaction liquid, so as to obtain bismuth oxychloride pearlescent pigment products. The bismuth oxychloride pearlescent pigment manufactured according to the method is uniform in appearance and good glossiness; the method has the advantages that the raw materials are price and easy to get, the technology is simple, parameters are convenient to adjust, the controllability is high, and the method has a wide application prospect.

Description

technical field [0001] The invention relates to a method for synthesizing a bismuth oxychloride pearlescent pigment, which belongs to the field of inorganic non-metallic materials. Background technique [0002] As a high-brightness material that can increase the added value of products, pearlescent pigments are widely used in the printing industry. It can not only improve the brilliance of product color, but also change the color rendering effect. It is a new type of material in packaging printing, color printing and other industries. Bismuth oxychloride (BiOCl) is second only to mica titanium pearlescent pigments in pearlescent pigments, and is widely used in cosmetics production, automotive coatings and manufacturing pearlescent plastic films. Compared with mica titanium pearlescent pigments, bismuth oxychloride not only has pearl luster, but also has a very delicate mercerizing effect that mica titanium pearlescent pigments do not have. [0003] At present, the most com...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G29/00
CPCC01G29/00C01P2002/72C01P2002/82C01P2004/03
Inventor 焦秀玲韩艳阳陈代荣
Owner SHANDONG UNIV
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