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Method for synthesizing nano hydrated crystalline sodium silicon titanate by utilizing inorganic raw material

A technology of sodium titanate silicate, inorganic raw materials, applied in the fields of nanotechnology, nanotechnology, nanotechnology, etc. for materials and surface science, can solve the problem of CST samples containing impurity, high cost of organic silicon source/titanium source, environmental problems Problems such as serious pollution, to achieve the effects of strong chemical stability, high cost, and accelerated development

Inactive Publication Date: 2017-06-23
SOUTHWEAT UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The cost of using organosilicon source / titanium source is high, the environmental problem is serious, and the CST sample prepared by this method contains impurities

Method used

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  • Method for synthesizing nano hydrated crystalline sodium silicon titanate by utilizing inorganic raw material
  • Method for synthesizing nano hydrated crystalline sodium silicon titanate by utilizing inorganic raw material
  • Method for synthesizing nano hydrated crystalline sodium silicon titanate by utilizing inorganic raw material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] First weigh 25.3571g Na 2 Si 2 O 3 ·9H 2 O solids and 9g NaOH solids were dissolved in ultrapure water at room temperature and under magnetic stirring to prepare a 500mL solution to obtain a silicon solution with a silicon concentration of 5g / L. Then, under magnetic stirring, in a fume hood, add 5mL TiCl 4 The solution was slowly added dropwise to 20mL of absolute ethanol to obtain a uniform and transparent yellow solution, namely TiCl 4 -CH 3 CH 2 OH. Then take 50mL of the silicon solution obtained in the previous process and add it to a pressure vessel made of polytetrafluoroethylene, and take TiCl 4 -CH 3 CH 2 OH5mL. TiCl 4 -CH 3 CH 2 OH was added to the silicon liquid and stirred continuously to obtain a uniform sol-gel, and the pH was adjusted to 12.5 to 12.7. The pressure vessel was put into an autoclave, sealed, and then put in an oven at a temperature of 170° C. and heated for 7 days. After 7 days, take out the white solid obtained and filter to remove the impur...

Embodiment 2

[0024] First weigh 30.4285g Na 2 Si 2 O 3 ·9H 2 O solid and 9g NaOH solid were dissolved in ultrapure water at room temperature and under magnetic stirring to prepare a 500mL solution to obtain a silicon solution with a silicon concentration of 6g / L. Then, under magnetic stirring, in a fume hood, add 5mL TiCl 4 The solution was slowly added dropwise to 20mL of absolute ethanol to obtain a uniform and transparent yellow solution, namely TiCl 4 -CH 3 CH 2 OH. Then take 50mL of the silicon solution obtained in the previous process and add it to a pressure vessel made of polytetrafluoroethylene, and take TiCl 4 -CH 3 CH 2 OH6mL. TiCl 4 -CH 3 CH 2 OH was added to the silicon liquid and stirred continuously to obtain a uniform sol-gel, and the pH was adjusted to 12.5 to 12.7. The pressure vessel was put into an autoclave, sealed, and then put in an oven at a temperature of 170° C. and heated for 7 days. After 7 days, take out the white solid obtained and filter to remove the impurit...

Embodiment 3

[0027] First weigh 35.4999g Na 2 Si 2 O 3 ·9H 2 O solids and 9g NaOH solids were dissolved in ultrapure water at room temperature and under magnetic stirring to prepare a 500mL solution to obtain a silicon liquid with a silicon concentration of 7g / L. Then, under magnetic stirring, in a fume hood, add 5mL TiCl 4 The solution was slowly added dropwise to 20mL of absolute ethanol to obtain a uniform and transparent yellow solution, namely TiCl 4 -CH 3 CH 2 OH. Then take 50mL of the silicon solution obtained in the previous process and add it to a pressure vessel made of polytetrafluoroethylene, and take TiCl 4 -CH 3 CH 2 OH7mL. TiCl 4 -CH 3 CH 2 OH was added to the silicon liquid and stirred continuously to obtain a uniform sol-gel, and the pH was adjusted to 12.5 to 12.7. The pressure vessel was put into an autoclave, sealed, and then put in an oven at a temperature of 170° C. and heated for 7 days. After 7 days, take out the white solid obtained and filter to remove the impurit...

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Abstract

The invention discloses a method for synthesizing nano hydrated crystalline sodium silicon titanate by utilizing an inorganic raw material. According to the method, Na2Si2O3.9H2O and NaOH are used as silicon sources and an ethanol solution of TiCl4 is used as a titanium source; a nano CST (Crystalline Silicotitanate) crystal without an impure phase is successfully prepared by adopting a sol gel-hydrothermal synthesis method; the difficulty that the prepared CST contains the impure phase is solved; the method is low in operation cost and simple in preparation process.

Description

Technical field [0001] The invention relates to the resource treatment of radioactive waste belonging to the field of environmental protection, and relates to a method for synthesizing functional materials that can effectively treat cesium-strontium-containing radioactive waste water, in particular to the synthesis of nano-hydrated crystalline sodium silicate titanate (CST) method. Background technique [0002] With the rapid development of nuclear power, people are paying more and more attention to the safe treatment and disposal of nuclear waste. High-level liquid waste 90 Sr (T 1 / 2 =28.79 years, 100% beta decay, E β =546 keV) and 137 Cs(T 1 / 2 = 30.02 years, 100% beta decay, associated gamma ray energy E γ =661 keV) is a high-release thermal fission product with a long half-life. 137 Cs + / 90 Sr 2+ It is one of the keys to the research of high-level radioactive waste liquid treatment and disposal technology. Currently, including 137 Cs + / 90 Sr 2+ The safe disposal methods o...

Claims

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Application Information

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IPC IPC(8): C01B33/20G21F9/12B82Y30/00B82Y40/00
CPCC01B33/20B82Y30/00B82Y40/00C01P2002/72C01P2004/03C01P2004/04C01P2004/38C01P2004/50C01P2004/62C01P2004/64G21F9/12
Inventor 陈梦君王蓉谭秋峡刘小楠
Owner SOUTHWEAT UNIV OF SCI & TECH
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