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Preparation method of composite titanium dioxide pigment with wollastonite coated with titanium dioxide

A technology of composite titanium dioxide and its manufacturing method, which is applied in the direction of inorganic pigment treatment, chemical instruments and methods, dyeing organosilicon compound treatment, etc., to achieve the effects of improving whiteness, avoiding settlement, and reducing use cost

Inactive Publication Date: 2017-04-26
大连环球矿产股份有限公司
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Problems solved by technology

[0003] In order to solve the above-mentioned problems existing in the existing composite titanium dioxide, the invention provides a method for manufacturing a composite titanium dioxide pigment coated with wollastonite by titanium dioxide

Method used

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Embodiment Construction

[0017] The manufacture method of the composite titanium dioxide pigment of titanium dioxide coated wollastonite of the present invention comprises the following steps:

[0018] (1) Perform surface pretreatment on wollastonite that meets the predetermined particle size, wet the prepared titanium dioxide for surface pretreatment, and use wollastonite surface pretreatment as a silane coupling agent by mass percentage Calculated, the dosage is 0-3%; the treatment agent used for surface pretreatment by wetting titanium dioxide is a silane coupling agent, and the dosage is 0-3% by mass percentage;

[0019] (2) Add wollastonite powder and titanium dioxide into the high-speed mixer and mix them thoroughly. The technical conditions for mixing wollastonite and titanium dioxide are: the stirring speed of the high-speed mixer is 50-300rpm, the heating temperature is 20-90°C, and the reaction The time is 8-60min;

[0020] (3) Grind with a wet grinder, and coat the mixed wollastonite powde...

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Abstract

The invention discloses a preparation method of composite titanium dioxide pigment with wollastonite coated with titanium dioxide. The preparation method includes following steps: (1), performing surface pretreatment on wollastonite, and wetting titanium dioxide for surface pretreatment; (2), adding wollastonite powder and titanium dioxide into a high-speed stirrer, and mixing sufficiently; (3), utilizing a wet-type grinder for grinding, and performing envelope treatment on the wollastonite powder and titanium dioxide after being mixed; (4), using a plate-and-frame filter press to filter-press ground paste, and subjecting an obtained filter cake to water washing; (5), drying; (6), crushing. By the preparation method, whiteness is improved without lowering using effects like covering power of titanium dioxide, using cost can be lowered substantially, and sedimentation in the previous process of solely using wollastonite to replace titanium dioxide is avoided.

Description

technical field [0001] The invention relates to the field of chemical industry, and more specifically relates to a coating method of titanium dioxide. Background technique [0002] The currently disclosed composite titanium dioxide production process mainly uses heavy calcium, light calcium, etc. as cores for coating. The patent application number CN89108819.9 discloses a method for composite titanium dioxide with wollastonite, which mainly consists of TiO2, Composed of CaSiO3, ZnO, AL2O3 and silane coupling agent, simply mix the above raw materials evenly to get composite titanium dioxide, the production process is simple, the coating is incomplete, the use effect is poor, and the cost is high. Contents of the invention [0003] In order to solve the above-mentioned problems existing in the existing composite titanium dioxide, the present invention provides a method for manufacturing a titanium dioxide-coated wollastonite composite titanium dioxide pigment. [0004] The ...

Claims

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Application Information

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IPC IPC(8): C09C1/36C09C3/04C09C3/06C09C3/12
CPCC09C1/3661C01P2006/65C09C3/006C09C3/041C09C3/043C09C3/063C09C3/12
Inventor 姜山张梦显梁洪文
Owner 大连环球矿产股份有限公司
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