Preparation method of modified titanium dioxide, modified titanium dioxide and application

A titanium dioxide and modification technology, which is applied in the field of titanium dioxide, can solve the problems of efflorescence and poor weather resistance of colored mortars, and achieve the effects of enhancing vividness, reducing efflorescence, and good weather resistance

Active Publication Date: 2020-08-14
鑫统领建材集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a preparation method of modified titanium dioxide and modified titanium dioxide to solve the poor weather resistance of colored mortar in the prior art. For dry-mixed mortar using Portland cement as a cementitious material , it is prone to technical problems with ubiquitine

Method used

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  • Preparation method of modified titanium dioxide, modified titanium dioxide and application
  • Preparation method of modified titanium dioxide, modified titanium dioxide and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] Preparation of modified titanium dioxide:

[0051] Raw materials (by weight): 1 part of butyl titanate, 10 parts of water;

[0052] A1. Add butyl titanate to the reactor, at a temperature of 85°C, N 2 Vaporize butyl titanate under protection;

[0053] A2. Add water into the reactor; when the reaction temperature is 525°C and the pressure is 1.01×10 5 Pa, N 2 Reaction under the protection of (nitrogen flow rate 1L / min, water vapor flow rate 1L / min, reaction time 30min), to obtain R818 nano-TiO 2 ;

[0054] A3, the nano-TiO that step A2 obtains 2 placed under inert gas CO 2 cool down to 23°C in an atmosphere;

[0055] A4, the TiO obtained by cooling in step A3 2 Placed in a 45μm round hole sieve to control TiO 2 The content is more than 98%, the sieve residue is less than 0.01%, the volatile matter at 105°C is less than 0.05%, and the L value ranges from 98.5 to 100, and the finished product of modified titanium dioxide is obtained.

Embodiment 2

[0057] Preparation of modified titanium dioxide:

[0058] Raw materials (by weight): 1 part of butyl titanate, 15 parts of water;

[0059] A1. Add butyl titanate to the reactor, at a temperature of 60°C, N 2 Vaporize butyl titanate under protection;

[0060] A2. Add water to the reactor; when the reaction temperature is 510°C and the pressure is 1.5×10 5 Pa, N 2 Reaction under the protection of (nitrogen flow rate 1L / min, water vapor flow rate 1L / min, reaction time 30min), to obtain R818 nano-TiO 2 ;

[0061] A3, the nano-TiO that step A2 obtains 2 placed under inert gas CO 2 Cool down to 22°C in an atmosphere;

[0062] A4, the TiO obtained by cooling in step A3 2 Placed in a 45μm round hole sieve to control TiO 2 The content is more than 98%, the sieve residue is less than 0.01%, the volatile matter at 105°C is less than 0.05%, and the L value ranges from 98.5 to 100, and the finished product of modified titanium dioxide is obtained.

Embodiment 3

[0064] Preparation of modified titanium dioxide:

[0065] Raw materials (by weight): 1 part of butyl titanate, 6 parts of water;

[0066] A1. Add butyl titanate into the reactor, at a temperature of 110°C, N 2 Vaporize butyl titanate under protection;

[0067] A2. Add water into the reactor; when the reaction temperature is 530°C and the pressure is 0.5×10 5 Pa, N 2 Reaction under the protection of (nitrogen flow rate 1L / min, water vapor flow rate 1L / min, reaction time 20min) to obtain R818 nano-TiO 2 ;

[0068] A3, the nano-TiO that step A2 obtains 2 placed under inert gas CO 2 cool down to 24°C in an atmosphere;

[0069] A4, the TiO obtained by cooling in step A3 2 Placed in a 45μm round hole sieve to control TiO 2 The content is more than 98%, the sieve residue is less than 0.01%, the volatile matter at 105°C is less than 0.05%, and the L value ranges from 98.5 to 100, and the finished product of modified titanium dioxide is obtained.

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Abstract

The invention provides a preparation method of modified titanium dioxide, the modified titanium dioxide and application, and solves the technical problems that color mortar in the prior art is poor inweather resistance, and efflorescence easily occurs to dry-mixed mortar using Portland cement as a cementing material. The preparation method comprises the following steps: (1) gasifying butyl titanate; (2) adding water into a reactor for reaction to obtain nano TiO2; (3) cooling to 20-25 DEG C; and (4) carrying out screen analysis to obtain the modified titanium dioxide finished product. The modified titanium dioxide prepared by the method can be used as a weather-resistant additive to be added into colored dry-mixed mortar, and the modified nano titanium dioxide absorbs ultraviolet light and reflects a large amount of visible light so that the brilliance of colors can be enhanced; meanwhile, it can be guaranteed that the polymer in the cement paste body and the cement paste body cannotbe separated from each other due to the difference of linear expansion coefficients, and thus attachment of the polymer to Portland cement and refinement and filling of capillary pores are guaranteed.

Description

technical field [0001] The invention relates to a titanium dioxide, in particular to a preparation method of a modified titanium dioxide, the modified titanium dioxide and its application. Background technique [0002] Colored mortar is a kind of decorative mortar applied to the inner and outer walls of buildings. It is a kind of special mortar. It can resist the damage of high temperature, low temperature and humidity changes in the outside world. At the same time, it can also beautify and decorate buildings. It is mainly composed of cementitious materials. , fine aggregate, admixtures, additives, pigments, etc. These materials are mixed evenly in a dry form and then used after adding water and stirring at the construction site. Because of its bright and long-lasting color, it is widely used in industrial and civil buildings. [0003] As the pollution of the external environment increases and the climate changes, the weather resistance of colored mortar gradually decreases...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G23/053C04B14/30C04B103/54
CPCC01G23/053C04B14/305C01P2004/61C01P2006/62C01P2006/80C04B2103/54
Inventor 封培然张超于帅张旭东
Owner 鑫统领建材集团有限公司
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