Preparation method of titanium dioxide for acrylic chemical fiber extinction

Abstract

The invention discloses a preparation method of titanium dioxide for acrylic chemical fiber extinction. The method comprises the following steps: sequentially carrying out primary crushing, acidolysis, reduction, slag washing clarification, copperas crystallization separation, refined filtration, concentration, hydrolysis, filtration, primary water washing, bleaching, salt treatment, calcination,secondary crushing, secondary water washing, coating, washing, drying and superfine grinding on a raw material titanium fine powder to obtain titanium dioxide; and compared with titanium dioxide prepared through a traditional process, titanium dioxide prepared through adoption of the preparation method has more excellent optical performance, covering power, decoloration power and weather resistance.

Description

technical field [0001] The invention belongs to the technical field of textile raw materials, in particular to a preparation method of titanium dioxide for acrylic fiber chemical fiber matting. Background technique [0002] For acrylic fiber, white pigment is added before spinning to improve its optical properties. This process is called spinning matting, and the added white pigment is called "matting agent". Anatase titanium dioxide has good refractive index and sufficient hardness, strong adhesion, stable properties, high melting point, and is considered to be the best white pigment in the world today. Widely used in coatings, plastics, rubber, cosmetics, and chemical fiber industries. Anatase titanium dioxide is widely used as matting agent in chemical fiber industry. The average amount of titanium dioxide used for fiber-grade matting is 0.3% of the total fiber, and there is a large market gap, most of which rely on imports. [0003] Driven by science and technology, t...

AI Technical Summary

Problems solved by technology

[0004] For a long time, the production technology of sulfuric acid titanium dioxide in my country is backward, the product quality is unstable and the grade is low

The calcined titanium dioxide product has a coarse particle size and insufficient calcination strength, resulting in low TiO2 content and low rutile conversion rate. It shows poor weather resistance, poor dispersibility, low achromatic power, low hiding power and high oil absorption in the application of textile raw materials.

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