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Method for synthesizing pollucite by means of aluminosilicate polymer

A technology of aluminosilicate and polymer, which is applied in the field of cesium garnet synthesis, can solve the problems of high synthesis temperature, heavy pollution of cesium garnet, harsh preparation conditions, etc., and achieve no volatilization of cesium ions, low cost and simple method Effect

Inactive Publication Date: 2016-07-06
HARBIN INST OF TECH
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Problems solved by technology

[0003] The purpose of the present invention is to solve the problems in the above-mentioned prior art, that is, the problems of high pollution, high synthesis temperature and harsh preparation conditions for the synthesis of cesium garnet by the existing method

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Embodiment Construction

[0011] The present invention will be described in further detail below: the present embodiment is implemented on the premise of the technical solution of the present invention, and detailed implementation is provided, but the protection scope of the present invention is not limited to the following examples.

[0012] A kind of method that utilizes aluminosilicate polymer to synthesize cesium garnet involved in this embodiment is realized by the following steps:

[0013] Step 1. Preparation of mixed alkali excitation solution: dissolving cesium hydroxide and sodium hydroxide in silica sol with a mass concentration of 25% to 45%, and obtaining a mixed alkali excitation solution of cesium silicate and sodium silicate after mechanical stirring , the molar ratio of cesium silicate and sodium silicate in the mixed alkali excitation solution is 9:1~3:2, and the molar ratio of alkali metal ion and silicon element is 1:1;

[0014] Step 2. Preparation of metakaolin: Put the kaolin in an...

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Abstract

The invention provides a method for synthesizing pollucite by means of an aluminosilicate polymer.The method comprises the steps that cesium hydroxide and sodium hydroxide are dissolved in silica sol with the mass concentration of 25%-45%, mechanical stirring is conducted, and a mixed alkali-activated solution of cesium silicate and sodium silicate is obtained; kaolin is put into an alumina crucible, the alumina crucible containing kaolin is put into a muffle furnace, the temperature is set to range from 500 DEG C to 900 DEG C, the heat preservation time ranges from 1.5 h to 2.5 h, and metakaolin powder is obtained; the mixed alkali-activated solution is put into an ice-water bath with the temperature ranging from 0 DEG C to 5 DEG C, the metakaolin powder is added, ultrasound treatment and mechanical stirring are conducted for 25 min-45 min, an aluminosilicate polymer slurry is obtained, deionized water is added to adjust the viscosity of the slurry to be 150 mPa.s-500 mPa.s when the shearing speed is 60 S<-1>-80 S<-1>, and the aluminosilicate polymer slurry is obtained; the obtained aluminosilicate polymer slurry is poured into a mold and cured for 3 h-24 h in a drying oven with the temperature ranging from 40 DEG C to 80 DEG C, and then pollucite is obtained.

Description

technical field [0001] The invention relates to a method for synthesizing cesium garnet by using an aluminosilicate polymer, and belongs to the technical field of simple and efficient methods for synthesizing cesium garnet. Background technique [0002] The rapid development of nuclear energy has effectively solved the current situation of the world's increasingly scarce energy. In most developed countries, the proportion of nuclear power in the total power capacity is relatively high, but in my country nuclear power only accounts for 2% of the total power capacity, so nuclear power will be an important direction for the future development of my country's energy. However, with the rapid construction of various nuclear facilities, a large amount of nuclear waste will be produced. In the treatment of nuclear waste, the treatment of highly radioactive nuclear waste containing high radioactive elements such as cesium, strontium and technetium and transuranium elements such as p...

Claims

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Application Information

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IPC IPC(8): C04B28/00C04B22/08C04B14/10
CPCC04B28/006C04B22/08C04B14/106
Inventor 何培刚贾德昌苑景坤闫姝杨治华段小明王胜金周玉
Owner HARBIN INST OF TECH
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