Preparation method of composite titanium dioxide

Abstract

The invention belongs to the field of preparation of composite titanium dioxide, and relates to a preparation method of composite titanium dioxide. The preparation method comprises the following steps: mixing and stirring oxalic acid, absolute ethyl alcohol and deionized water to obtain a stirred solution; mixing tetrabutyl titanate and absolute ethyl alcohol to obtain a mixed solution; adding themixed solution in the stirred solution, standing, placing precipitates in a water bath for evaporation, and drying to obtain a dried material; adding hydrochloric acid, mixing, standing, and filtering to obtain a filter residue, placing the filter residue in hot water, stirring, filtering to obtain a filter residue a, grinding, sieving to obtain a sieved material, adding a coupling agent and an ethanol solution, mixing, oscillating, performing suction filtering, drying, grinding to obtain a ground material, adding absolute ethyl alcohol and deionized water, mixing, stirring, adding a flourescent brightener, centrifuging, and performing vacuum drying on precipitates to obtain a dried material a; and mixing modified calcium carbonate, a dispersant, sodium dodecyl benzene sulfonate and water, grinding, adding the dried material a, grinding, dehydrating, drying, and crushing to obtain the composite titanium dioxide.

Description

technical field [0001] The invention belongs to the field of preparation of composite titanium dioxide, and relates to a preparation method of composite titanium dioxide. Background technique [0002] Titanium dioxide (TiO 2 ), commonly known as titanium dioxide, is currently the best performance and most widely used white industrial pigment, widely used in coatings, plastics, paper, ink, welding, enamel, cosmetics and other industries. Titanium dioxide is mainly composed of crystalline titanium dioxide. The refractive index of crystalline titanium dioxide is much higher than that of other inorganic substances, so that titanium dioxide has the strongest covering ability and thus becomes the best white pigment. However, the resource consumption of titanium dioxide is too much and the cost is too high. At present, many manufacturers use titanium dioxide substitutes and titanium dioxide to prepare composite titanium dioxide. In order to ensure the composite powder, the titaniu...

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a method for preparing composite titanium dioxide for decorative base paper in view of the problems that titanium dioxide is easily agglomerated in the current market, resulting in insufficient whiteness and insufficient hiding power.