Production method of high-chromogenic-power enamel titanium dioxide for pigment by sulfuric acid method

Abstract

The invention relates to the field of titanium dioxide preparation and specifically relates to a production method of high-chromogenic-power enamel titanium dioxide for a pigment by a sulfuric acid method. The production method comprises the steps: (1) hydrolyzed crystal seed preparation; (2) hydrolysis; (3) washing; (4) calcining and the like. Titanium dioxide produced by using the production method of high-chromogenic-power enamel titanium dioxide for the pigment by the sulfuric acid method has particles with very uniform particle sizes and is small in particle size and high in specific surface area; the prepared titanium dioxide is very ideal in chromogenic effect after being caked, high in chromogenic rate, stability in chromogenic effect and good in glossiness, is high-quality pigmenttitanium dioxide and has the advantages such as low dosage, strong chromogenic capacity, uniform in chromogenic effect, consistent in color light and hue and stable using effect; and compared with atraditional conventional product, the production method has the advantages such as low production cost and stable quality and is deeply welcomed by customers.

Description

technical field [0001] The invention relates to the field of titanium dioxide preparation, in particular to a production method of high color-developing power sulfuric acid enamel titanium dioxide for color materials. Background technique [0002] Titanium dioxide is considered to be a white pigment with the best performance in the world, and it is widely used in coatings, plastics, papermaking, printing ink, chemical fiber, rubber, cosmetics and other industries. Titanium dioxide (titanium dioxide) is chemically stable and generally does not react with most substances. There are three crystallizations of titanium dioxide in nature: brookite, anatase and rutile. The brook titanium type is an unstable crystal form and has no industrial application value. Both the anatase type (A type for short) and the rutile type (Rutile type for short) have stable crystal lattices and are important white pigments and porcelain glazes. Compared with other white pigments, it has superior wh...

AI Technical Summary

Problems solved by technology

Concentrating titanium liquid not only increases equipment investment, but also consumes a lot of energy, which undoubtedly increases the manufacturing cost and difficulty of production

[0006] The metatitanic acid hydrolyzed by adjusting the concentration of the hydrolyzed titanium solution has poor particle size and distribution stability.

It is mainly reflected in the fact that the average particle size has achieved the expected purpose, but the distribution range is beyond the control range, and the proportion of fine particles and coarse particles is relatively large; the calcined titanium dioxide pink phase fluctuations, bulk specific gravity fluctuations, hair color fluctuations, and gloss fluctuations

Product quality often fails to meet customer requirements

Moreover, the method of dynamically adjusting the hydrolysis concentration is used. Due to the low hydrolysis concentration, the steam consumption is relatively large and the energy consumption is large.

At present, the ceramic industry is a large user of titanium dioxide. During the use of conventional ceramic titanium dioxide in the production of ceramic pigments, problems such as color light, color tone differences, and uneven color development often occur, which eventually lead to color differences in pigment products and qualified products. low rate

In order to overcome the above problems, ceramic enterprises often adopt the method of increasing the amount of titanium dioxide, which not only cannot fundamentally solve the technical problems, but also increases the workload of color separation and mixing in the later stage of color production, reducing production. efficiency, increased production costs

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