High-strength rubidium/cesium special-effect adsorbent as well as preparation method and application thereof

A high-strength, adsorbent technology, applied in chemical instruments and methods, adsorption water/sewage treatment, other chemical processes, etc., can solve the problem of high brittleness of silica gel, poor binding force of gel carrier, low connection strength, etc. problems, achieve excellent chemical stability, excellent acid resistance, and improve mechanical properties

Active Publication Date: 2022-04-01
HUAIYIN INSTITUTE OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, silica gel is brittle and low in strength, and the gel network structure is easy to collapse under the action of external force, making it difficult to recycle.
Similarly, the connection strength between the MG blocks (mannuronic acid M-guluronic acid G) in the calcium alginate gel molecule is low, and its gel network structure is also prone to collapse during recycling.
On the other hand, the heteropoly acid salt is only wrapped inside the gel, and has poor binding force with the gel carrier, and it is easy to fall off from the gel carrier, resulting in a decrease in adsorption performance.

Method used

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  • High-strength rubidium/cesium special-effect adsorbent as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Dissolve 3-aminopropyltriethoxysilane in 95% ethanol solvent and stir to obtain a transparent solution, add ammonium phosphomolybdate to the solution and perform mechanical stirring for 4 h, then filter to obtain amino-modified ammonium phosphomolybdate, Wherein the mass ratio of 3-aminopropyltriethoxysilane, ammonium phosphomolybdate, and 95% ethanol is 1: 10: 50.

[0031] Add bisphenol A epoxy resin into dibutyl phthalate and stir to obtain a viscous solution with a viscosity of 0.2 Pa s. Add amino-modified ammonium phosphomolybdate to the solution and continue stirring for 0.5 h, then Add aliphatic polyamine cross-linking agent and stir for 30 min, then stand still to get epoxy resin gel / amino-modified ammonium phosphomolybdate composite high-strength rubidium and cesium special-effect adsorbent, in which bisphenol A epoxy resin, amino-modified The mass ratio of ammonium phosphomolybdate and aliphatic polyamine crosslinking agent is 1:2:0.03.

[0032] The compressiv...

Embodiment 2

[0038] Diethylenetriaminopropyltrimethoxysilane was dissolved in 95% ethanol solvent and stirred to obtain a transparent solution, ammonium phosphomolybdate was added to the solution, mechanically stirred for 2 h, and then filtered to obtain amino-modified ammonium phosphomolybdate , wherein the mass ratio of diethylenetriaminopropyltrimethoxysilane, ammonium phosphomolybdate, and 95% ethanol is 1: 15: 100.

[0039]Add bisphenol F epoxy resin into dibutyl phthalate and stir to obtain a viscous solution with a viscosity of 1.5 Pa s. Add amino-modified ammonium phosphomolybdate to the solution and continue stirring for 1 h, then Add polyamide polyamine cross-linking agent and stir for 20 min, then stand still to obtain high-strength rubidium and cesium special-effect adsorbent compounded by epoxy resin gel / amino-modified ammonium phosphomolybdate, in which bisphenol F epoxy resin, amino-modified The mass ratio of ammonium phosphomolybdate and polyamide polyamine crosslinking age...

Embodiment 3

[0042] Dissolve N-(β-aminoethyl)-γ-aminopropyltrimethoxysilane in 95% ethanol solvent and stir to obtain a transparent solution, add ammonium phosphotungstate to the solution, stir mechanically for 1 h, and then filter Obtain amino-modified ammonium phosphotungstate, wherein the mass ratio of N-(β-aminoethyl)-γ-aminopropyltrimethoxysilane, ammonium phosphotungstate, and 95% ethanol is 1: 15: 100.

[0043] Add bisphenol S-type epoxy resin into acetone and stir to obtain a viscous solution with a viscosity of 4 Pa ​​s. Add amino-modified ammonium phosphotungstate to the solution and continue stirring for 1 h, then add alicyclic polyamine exchange The mixture was stirred for 20 min, and left to stand to obtain a high-strength rubidium and cesium special-effect adsorbent composited by epoxy resin gel / amino-modified ammonium phosphotungstate, in which bisphenol S-type epoxy resin, amino-modified ammonium phosphotungstate, The mass ratio of the cycloaliphatic polyamine crosslinking ...

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Abstract

The invention discloses a high-strength rubidium / cesium special-effect adsorbent as well as a preparation method and application thereof. Epoxy resin gel is taken as a carrier, and amino modified heteropolyacid salt is taken as an adsorption effective component. The preparation method comprises the following steps: (1) dissolving amino silane in a 95% ethanol solvent, stirring to obtain a transparent solution, adding heteropolyacid salt into the solution, mechanically stirring for 1-4 hours, and filtering to obtain amino modified heteropolyacid salt; and (2) adding epoxy resin into the non-active diluent, stirring to obtain a viscous solution, adding the amino modified heteropolyacid salt prepared in the step (1) into the solution, continuously stirring, adding the polyamine cross-linking agent, stirring, and standing to obtain the high-strength rubidium / cesium special-effect adsorbent. The high-strength rubidium / cesium special-effect adsorbent has excellent chemical stability and acid, alkali and salt resistance, is high in rubidium and cesium selectivity and large in adsorption capacity, and is suitable for large-scale dynamic extraction of rubidium and cesium from salt lake brine.

Description

technical field [0001] The invention belongs to the technical field of adsorbent preparation, and relates to the preparation of rubidium / cesium adsorbent, in particular to a high-strength rubidium / cesium special-effect adsorbent and its preparation method and application. Background technique [0002] Rubidium (Rb) and cesium (Cs) are extremely important metal resources, which have important applications in many fields such as medical treatment, optoelectronic devices and catalysis. In nature, in addition to solid minerals such as lepidolite and cesium garnet, rubidium and cesium also exist in liquid resources such as salt lake brine, geothermal water, and oilfield water. For example, the average rubidium content in the brine of Qaidam Salt Lake in Qinghai Province is 10.8 mg L -1. Containing cesium 0.034 mg·L-1, the total reserves are considerable, and the development value is great. [0003] At present, the separation and extraction of rubidium and cesium from salt lake b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/26B01J20/28B01J20/30C02F1/28C02F101/20
CPCY02P10/20
Inventor 李进郭探云山李彦兴朱秀芳徐海青周峰
Owner HUAIYIN INSTITUTE OF TECHNOLOGY
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