Stibonium potassium silicate and application and preparation method of stibonium potassium silicate

A technology of potassium antimony silicate and its application method, which is applied in the chemical field to achieve the effects of stable column separation performance, good selectivity, and good irradiance

Inactive Publication Date: 2016-06-08
NUCLEAR POWER INSTITUTE OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, for the removal of radioactive waste water 60 There are relatively few reports on Co in China, especially the artificially synthesized new inorganic ion adsorbents.

Method used

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  • Stibonium potassium silicate and application and preparation method of stibonium potassium silicate
  • Stibonium potassium silicate and application and preparation method of stibonium potassium silicate
  • Stibonium potassium silicate and application and preparation method of stibonium potassium silicate

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Embodiment 1

[0031] Preparation of potassium antimony silicate

[0032] Take 10.52g KSb(OH) 6 Dissolve in 360 mL of heated distilled water, and gradually add TEOS with a Si:Sb molar ratio of 1-2:1-2 and dissolved in ethanol under stirring conditions. After the mixture was stirred and reacted at a constant temperature of 75-80°C for 1 hour, 5.5mL of analytically pure concentrated nitric acid was added to form polymer crystals, which were precipitated from the solution. After removal, dry in a thermostat at 50°C to obtain potassium antimony silicate. The volume ratio of TEOS and ethanol is 1:2. The addition amount of analytically pure concentrated nitric acid is suitable, and the precipitation of polymer crystals shall prevail.

[0033] For the spatial structure of potassium antimony silicate, see figure 1 . figure 1 The spatial structure diagram automatically generated for XRD, K (big ball, for easy viewing, the size of the ball in the picture can be set) is tightly embedded in the mol...

Embodiment 2

[0042] Modification of Potassium Antimony Silicate

[0043] The potassium antimonosilicate obtained in Example 1 was heated overnight at 110-680°C to obtain modified potassium antimonosilicate, which was stored for future use.

[0044] Such as Figure 4 As shown, the optimum temperature range for modification is 180-480°C. In this range, the modified potassium antimony silicate has a large adsorption of cobalt 60, reaching more than 95%.

Embodiment 3

[0046] Application of antimony potassium silicate or modified antimony potassium silicate: for separation (adsorption) of radioactive waste liquid 60 Co.

[0047] Determination of Composition of Simulated Co-Containing Waste Liquid and Radioactive Raw Water

[0048] The Co concentration in the simulated Co-containing waste liquid is 10mg / L, and the composition of the simulated Co-containing waste liquid containing metal impurity ions is: 5mg / LCo, 10mg / LFe, 5mg / LNi, 2.5mg / LMg, 2.5mg / LCa; Raw water mainly contains cations 10mg / L-Na, 5mg / L-K, 1mg / L-Mg, 10mg / L-Ca, and less than 1mg / L-Cu, Fe, Pb, Ni and Co, anions 2mg / LF - , 5mg / LCl - , 10mg / LSO 4 2- , 25mg / LNO 3 - , radionuclide 150kBq / L- 60 Co, 25kBq / L- 137 Cs.

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Abstract

The invention discloses stibonium potassium silicate and application and a preparation method of the stibonium potassium silicate. The preparation method comprises the following steps: dissolving KSb(OH)6 into hot distilled water; under a stirring condition, gradually adding TEOS (Tetraethyl Orthosilicate) dissolved into ethanol, wherein the mol ratio of the KSb(OH)6 to the TEOS is (1 to 2):(1 to 2); stirring under a temperature condition of 75 DEG C to 80 DEG C, and reacting for 1 to 2 hours; then adding analytically pure concentrated nitric acid; finally, forming a polymer crystal and separating out; after standing at a room temperature, performing suction filtration on the polymer crystal with a vacuum pump, and eluting with the distilled water; then drying to obtain the product. The stibonium potassium silicate is mainly used as an inorganic ion adsorbent, and has a relatively high adsorption capability on 60Co in radioactive wastewater. The inorganic ion adsorbent disclosed by the invention has relatively high selectivity, relatively great adsorption capacity, and relatively excellent mechanical property and radiation-resisting property on the 60Co in the radioactive wastewater, so that the 60Co in the radioactive wastewater can be effectively removed.

Description

technical field [0001] The invention relates to the field of chemistry, in particular to potassium antimony silicate, its application and preparation method. Background technique [0002] 60 The half-life of Co is 5.27 years, and it can emit gamma rays with energies of 1.17MeV and 1.33MeV respectively. It is the main radionuclide in the shielded water of the production and use of cobalt source devices and the waste liquid treatment system of nuclear facilities such as nuclear power plants. It is also a nuclear reactor system loop. One of the main activated corrosion products. [0003] Many domestic early irradiation stations and source depots are facing decommissioning and dismantling. The wastewater collection pools or shielding pools of these small nuclear installations often do not have their own independent wastewater treatment systems. Resin adsorption is generally used to remove the wastewater. 60 Co, but the post-treatment of organic resin is difficult, and cement s...

Claims

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Application Information

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Patent Type & AuthorityApplications(China)
IPC IPC(8): B01J20/10C01G30/02G21F9/12
CPCB01J20/10C01G30/023C01G30/026G21F9/12
Inventor陈云明鲁芸芸李兵张劲松刘东彬曹骐严文超
OwnerNUCLEAR POWER INSTITUTE OF CHINA