Method for preparing rutile conductive titanium dioxide by dry method doping

Abstract

The invention belongs to the field of titanium white powder function materials, and particularly relates to a method of preparing rutile conductive titanium white powder through dry doping. An intermediate product metatitanic acid during titanium white powder production with a sulfate process with an already-added rutile type crystal seed is added to an oxalic acid solution, and a suspension is prepared; tin oxide and antimony trioxide are subjected to shear mixing and then added to the suspension; filtering and washing are then carried out until no oxalate exists; drying, grinding and roasting are carried out, cooling to a room temperature is carried out, and conductive titanium white powder is obtained after grinding. According to the conductive titanium white powder prepared by the method of the invention, the Hunter whiteness of the powder after grinding is detected to reach more than 92%, the lightening power reaches more than 95%, the glossiness L value reaches more than 93.5, the rutile content is larger than 90%, the powder resistivity is 20 to 60 omega.cm. The production cost is low, realization is easy, the granularity distribution is uniform, aggregation does not happen, and a near-white and other light-color permanent conductive and anti-static product can be prepared.

Description

technical field [0001] The invention belongs to the field of titanium dioxide functional materials, and in particular relates to a method for preparing rutile conductive titanium dioxide by dry doping. Background technique [0002] In recent years, with the rapid development of paint technology, paint technology has added infinite color space for people, but in some fields, after paint spraying, due to the influence of the environment, such as particles, dust, water vapor in the air, etc., it is easy to Cause the generation of static electricity, when the generated static electricity accumulates to a certain level, it will be dangerous. For this reason, the development of antistatic coatings has received more and more attention. Antistatic coatings must be added with conductive titanium dioxide. Conductive titanium dioxide can be combined with other pigments to make permanent conductive and antistatic products of various colors such as near white. It has been widely used in...

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Problems solved by technology

[0003] At present, the published patent CN1385862A, a preparation method of light-colored conductive powder and the patent CN102583524A, a preparation method of conductive titanium dioxide powder, both have problems such as uneven particle distribution, lack of pigment performance, and serious particle agglomeration. There are defects, and the pigment indicators such as whiteness and decolorization power are not ideal during use, which affects the use of the product and makes it difficult to realize industrial production

And patent CN102583524A is a kind of preparation method of conductive titanium dioxide powder, the preparation of titanium salt is complex, and the raw material is single, the titanium salt particle formed is not uniform enough, and the prepared titanium salt is a kind of colloid, it is difficult to realize the subsequent filtration and washing and cladding