Modified functional silica gel material as well as preparation method and application thereof

A technology of sexual function and silica gel, applied in the field of modified functionalized silica gel materials, it can solve the problems of increasing cement curing volume, poor selectivity, slow adsorption rate, etc., to improve thermal stability and radiation resistance, high load and adsorption Capacity, the effect of increasing the load rate

Active Publication Date: 2022-01-21
苏州硒诺唯新新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Biosorbents often refer to some organisms and their derivatives (such as bacteria, fungi, etc.), whose raw materials are easy to obtain and use methods are relatively simple, so they have been widely studied, but their growth conditions are relatively harsh, the adsorption capacity is limited, and it is not easy to scale up
Organic adsorbents often refer to a class of adsorbents containing macromolecular polymers or biopolymers, such as polyacrylamide, chitosan, cellulose, etc. Although organic adsorbents have strong adsorption capacity, easy elution, and cheap materials, However, its shortcomings such as acid resistance, radiation resistance, poor stability and high expansion rate limit its use.
Inorganic adsorbents have been used as adsorbent materials to treat radioactive wastewater because of their good thermal stability, mechanical properties, and radiation resistance, but their disadvantages such as low adsorption capacity, slow adsorption rate, and poor selectivity restrict their use.
[0004] The radioactive waste liquid treatment process is mainly "ion exchange + evaporation"; the ion exchange process widely uses organic ion exchange resins to absorb radioactive ions in the radioactive waste liquid, and its effect on nuclides in the form of complexes (such as 110Ag, 60Co, 58Co, etc.) The adsorption effect is very small, easily affected by high salinity and suspended particles, and the adsorption capacity is low
In addition, the waste resin produced by adsorbing radioactive substances needs to be dehydrated and then solidified with cement. During the curing process, part of the damaged waste resin will float on the surface of the cement, which greatly increases the volume of cement solidified (1 volume of waste resin needs 5 volumes of cement to solidify) , reducing the curing efficiency

Method used

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  • Modified functional silica gel material as well as preparation method and application thereof
  • Modified functional silica gel material as well as preparation method and application thereof
  • Modified functional silica gel material as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Preparation of polyfunctional cross-linked amino-functionalized silica gel shown in structural formula III: the solution of 3-chloropropylthiopropyltrimethoxysilane (0.3mol) and diethylenetriamine (0.6mol) was heated to 70°C Stir and heat for 2 hours, add 1,2-dichloroethane solution (0.3mol), heat the solution and stir at 100-110°C for 3 hours, then add methanol (150mL) and heat the solution, stir for 1 hour , and then cooled. This solution was added to a stirred mixture of silica gel (200 g, 60-200 μm, 100-140 Å) and toluene (400 mL), the mixture was stirred and refluxed for 6 h, cooled and the solid filtered, washed with ethanol (3×400 mL) by centrifugation and After drying, the compound represented by structural formula III is obtained, wherein m is 3, p is 2, a, b and c all exist, and d and e are both zero.

[0043] Prepare the modified functionalized silica gel material shown in structural formula I: Take 100g of the compound shown in the above structural formula ...

Embodiment 2

[0046] Preparation of polyfunctional cross-linked amino-functionalized silica gel shown in structural formula III: a solution of 3-chloropropylthiopropyltrimethoxysilane (0.8mol) and tetraethylenepentamine (1.6mol) was heated to 70°C Stir and heat for 2 hours, add a solution of 1,2-dichloroethane (1.6mol) and tetraethylenepentamine (0.4mol), heat the solution and stir at 100-110°C for 3 hours, add methanol (150 mL) and heated, stirred for 1 hour, then cooled. This solution and 3-mercaptopropyltrimethoxysilane (0.1 mol) were added to a stirred mixture of silica gel (700 g, 200-500 μm, 100-140 Å) and toluene (1.4 L), and the mixture was stirred and refluxed for 6 hours, Cool and filter the solid, wash with deionized water (3×1.6L) and dry to obtain the compound shown in the structural formula III, wherein m is 3, p is 4, W is 3-mercaptopropyl, a, b, c and e both exist and d is 0.

[0047] Prepare the modified functionalized silica gel material shown in structural formula I: Ta...

Embodiment 3

[0050] Preparation of polyfunctional cross-linked amino-functionalized silica gel shown in structural formula III: a solution of 3-chloropropylthiopropyltrimethoxysilane (1mol) and non-ethylene decaamine (1.8mol) was heated to 70°C and Stir and heat for 2 hours, add a solution of 1,2-dichloroethane (2.4mol) and non-ethylene decaamine (0.2mol), then heat and stir at 100-110°C for 5 hours, add methanol (450mL ) and the solution was heated, stirred for 1 hour, then cooled. This solution was added to a stirred mixture of silica gel (600 g, 200-500 μm, 100-140 Å) and toluene (1.2 L) along with 3-mercaptopropyltrimethoxysilane (0.1 mol) and hexyltrimethoxysilane (0.06 mol) , the mixture was stirred and refluxed for 6 hours, cooled and filtered the solid, washed with deionized water (3×1.6 L) and dried to obtain the compound shown in the structural formula III, wherein m is 3, p is 9, and W is 3 - mercaptopropyl, V is hexyl, a, b, c, d and e are all present.

[0051] Prepare the mo...

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Abstract

The invention discloses a modified functional silica gel material as well as a preparation method and application thereof. The modified functional silica gel material is obtained by carrying out quaternization or sulfonation reaction on a multifunctional cross-linked amino functional silica gel material. The modified functional silica gel material has the advantages of being good in adsorption effect, high in irradiation resistance, small in curing size and high in curing efficiency, and radioactive wastewater can be efficiently purified.

Description

technical field [0001] The invention belongs to the technical field of material synthesis and radioactive waste water treatment, and in particular relates to a modified functionalized silica gel material, a preparation method and its application in the purification of radioactive waste water. Background technique [0002] Commonly used traditional radioactive wastewater treatment technologies mainly include chemical precipitation, evaporation concentration, ion exchange, membrane separation technology, adsorption, etc. The adsorption method has attracted much attention due to its advantages of high efficiency, simple operation, low equipment requirements, and low cost. [0003] At present, the adsorbents used in the adsorption method mainly include biological adsorbents, organic adsorbents and inorganic adsorbents. Biosorbents often refer to some organisms and their derivatives (such as bacteria, fungi, etc.), whose raw materials are easy to obtain and use methods are relat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/26G21F9/12B01J20/30
CPCB01J20/267G21F9/12
Inventor 杨南超杨晓伟
Owner 苏州硒诺唯新新材料科技有限公司
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