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Method for producing nano-titanium dioxide by gelation method

A technology of nano-titanium dioxide and gelation, which is applied in the direction of titanium dioxide, titanium oxide/hydroxide, nanotechnology, etc., can solve the problems of particle size, difficult distribution, harsh conditions of gas phase method, high cost of raw materials, etc., to achieve easy surface treatment, The effect of simple equipment and easy access to raw materials

Inactive Publication Date: 2015-09-16
郭俊怀
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The gas phase method has harsh conditions and high cost; the solid phase method mainly relies on physical pulverization, and the particle size and distribution are not easy to control; the liquid phase method is mainly the sol-gel method, and the cost of raw materials is also high

Method used

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  • Method for producing nano-titanium dioxide by gelation method
  • Method for producing nano-titanium dioxide by gelation method
  • Method for producing nano-titanium dioxide by gelation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] 20Kg of TiCl 4 Put it into a 50L reactor, continuously feed air at a rate of 60L / h, slowly inject 3600g of distilled water with a large needle under stirring, and stir for 10 minutes. The gas discharged from the reactor is introduced into the absorption system for treatment. The material taken out from the reactor was transferred to a container with a suction device for further hydrolysis into puffy products, and then calcined at 300°C for 15 minutes. During calcination, air was introduced at a rate of 40L / h to maintain the oxidizing atmosphere of the system. For the grading treatment of the burned out, tens to tens of nanometers can be obtained, mainly sharp nano-TiO 2 particle.

Embodiment 2

[0055] 15Kg of TiCl 4 Put it into a 50L reaction kettle, and continuously feed air. Dissolve 60g of ZnCl in 2.8 liters of deionized water 2 , Slowly inject the solution into the reaction kettle with a large needle under stirring, and stir for 15 minutes. The gas discharged from the reactor is sent to the absorption system for treatment. Transfer the material to a container with an air extraction device to further absorb an appropriate amount of water vapor to make it bulky. Then calcined at 500°C for 20min. Air should also be introduced during calcination to maintain the oxidizing atmosphere of the system. For the grading treatment of the burned out, tens of nanometers of TiO mainly rutile can be obtained 2 particle.

Embodiment 3

[0057] 35Kg of TiCl 4 Put it into a 50L reactor, and continuously feed air at a rate of 60L / h. Dissolve 74g KNO with 4700g distilled water 3 and 42g of phosphoric acid, mix well, and slowly inject the solution into the reactor with a needle under stirring. Agitate for 15 minutes. The gas discharged from the reactor is sent to the absorption system for treatment. Transfer the material taken out from the reaction kettle to a container with a suction device, and further absorb an appropriate amount of water to make it bulky. Then calcined at 400°C for 30min. During calcination, air is introduced at a rate of 40L / h to maintain the oxidizing atmosphere of the system, and the gas and air released from the reaction should be introduced into the absorption system for treatment. For the classification treatment of the burned out, tens to tens of nanometers of sharp TiO2 particles can be obtained.

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Abstract

The invention discloses a method for producing nano titanium dioxide through a gelatinization method. The method comprises the following steps of: step 1, stirring and slowly adding water and metal chloride aqueous solution or metal nitrate aqueous solution into a reactor containing TiCl4 in an oxidizing atmosphere, enabling the temperature of a reaction system to be lower than 50 DEG C, and continuously mixing for 10-40 minutes to form gel; step 2, putting the gel formed in step 1 into a container with an air extractor so as to enable the gel to further absorb water vapor until a bulky state; step 3, calcining the material obtained in step 2 at 200-500 DEG C in the oxidizing atmosphere to obtain nanoscale TiO2 or aggregation body thereof; and step 4, performing stage treatment. The method for producing nano titanium dioxide through the gelatinization method provided by the invention is simple in technological equipment and easy in raw material obtaining and granularity and distribution control, and surface treatment is easily performed on the obtained nano titanium dioxide so as to meet different use requirements.

Description

Technical field [0001] The invention involves a way to produce titanium dioxide. Background technique [0002] Nano particles refer to the particle size of the particle size (1NM-100NM). Its size is in the transition range of atomic clusters and macro particles. Its structure is different from ordinary macro-solid substances and a single atom.Its special structural level makes it have surface effects, small size effects, quantum size effects, etc., and has a series of novel physical and chemical characteristics, so that it has important application value in many fields.Nano -titanium dioxide is one of the nanoparticles, and has its particularity in addition to the commonality of nanoparticles. [0003] 1. Optical performance and its application in paint [0004] When the particle size of nanoparticles is smaller than that of superconducting wavelengths, Boer radius, or Electrodic wavelength with electrons, the quantum size effect of small particles is very significant.At the same...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G23/053B82Y30/00
Inventor 郭俊怀耿维银赵太林
Owner 郭俊怀
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