Inorganic silica gel chelating ion exchange resin and preparation method thereof

A technology of chelating ions and exchange resins, which is applied in the direction of chelate ion exchange, ion exchange, chemical instruments and methods, etc. It can solve the problems of weak metal chemical bonding, low mechanical properties, poor thermal stability, etc., and achieve oxidation resistance Effects of mechanical and physical properties, fast exchange rate, and strong hydrophilicity

Inactive Publication Date: 2018-06-29
李宾
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Most of the currently used chelating resins are prepared with synthetic polymers as carriers. Due to their disadvantages such as low mechanical properties, poor thermal stability, weak chemical bonding with metals, long adsorption time, and high cost, scientists We are still searching for better adsorbents

Method used

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  • Inorganic silica gel chelating ion exchange resin and preparation method thereof
  • Inorganic silica gel chelating ion exchange resin and preparation method thereof
  • Inorganic silica gel chelating ion exchange resin and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Such as figure 1 As shown, add 10kg of silica gel matrix into a corrosion-resistant reaction kettle equipped with a stirrer, then add 60L, 1M HCl, after vacuuming for 10min, the vacuum degree is 30mmHg, start heating and boiling (100°C), and the stirring speed should not be too fast , controlled at 70 rpm, so as not to damage the silicone. Stir and pickle at a bubble point temperature of 100°C for 14 hours, then pass cooling water to cool down, and release the silica gel matrix when the material temperature drops to room temperature. The released silica gel matrix is ​​filtered to remove the filtrate, and then washed with deionized water, and the washing is stopped when the washing water shows neutrality, and the silica gel matrix and water are separated, and then the silica gel matrix is ​​dried to constant weight to obtain the acid-washed and dried to constant weight of the pretreated silica substrate.

[0042] Put the silica gel matrix that has been pickled and dri...

Embodiment 2

[0047] Such as figure 1 As shown, add 10 kg of silica gel matrix into a reaction kettle equipped with corrosion resistance, and then add 60L, 1M HNO 3 , after evacuating for 20 minutes, the vacuum degree is 40mmHg, start heating to 90°C, the stirring speed should not be too fast, control it at 75 rpm, so as not to damage the silica gel. Stir and pickle at a bubble point temperature of 90°C for 6-18 hours, then pass cooling water to cool down, and filter to obtain the acidified silica gel matrix when the material temperature drops to room temperature, and then wash with deionized water until it shows neutrality. Stop washing , and then dried to constant weight, to obtain the pretreated silica gel matrix.

[0048] Put the silica gel matrix that has been pickled and dried to constant weight on the sand funnel, let the humid air of potassium bromide saturated solution enter the sand funnel through the rubber tube, so that a monolayer of water molecules is formed on the surface of...

Embodiment 3

[0067] The chelating resin prepared by embodiment 1 and embodiment 2 is carried out the adsorption verification of nickel respectively.

[0068] The method is: put the chelating resin into the resin column respectively, and the column volume is 1m 3 , then use 25% sulfuric acid solution to wash the resin, and then rinse the resin to pH5 with water, and the laterite-nickel ore pickling solution (stock solution) is adsorbed through the column.

[0069] Table 1 Ferronickel content in the stock solution of laterite nickel ore acid leaching solution

[0070] serial number

Nickel (g / L)

Iron (g / L)

Velocity (m 3 / h)

1

0.7984

13.4

1.9

[0071] Use the chelating resin that embodiment 1 prepares to have the relationship between nickel-iron adsorption amount and volume in the adsorption process as shown in table 2:

[0072]

[0073]

[0074] Take water as the record of the chelating resin prepared by cleaning solution cleaning emb...

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Abstract

The invention belongs to the technical field of polymeric ion exchange resin, and relates to inorganic silica gel chelating ion exchange resin and a preparation method thereof. The preparation methodcomprises the steps of under a condition of heating, acidizing a silica gel matrix by using acid, and washing the silica gel matrix to be neutral by using deionized water; contacting damp air of a saturated solution of sodium bromide or potassium bromide with the silica gel matrix, so as to generate a single water molecule layer on the surface of the silica gel matrix; performing a silanization reaction on a hydrated silicon rubber matrix and alkane and a silane coupling agent, so as to obtain a silanized matrix; performing grafting reaction on the silanized matrix and a polyamine polymer so as to obtain a functional resin material, then performing Manich reaction on the functional resin material and methanol and phosphorous acid to obtain the inorganic silicon rubber chelating ion exchange resin finally. When the resin is used for mineral wet metallurgy, the leach solution adsorbs ions like copper, nickel, cobalt, precious metals, and rare earth, no additive is added in an ion exchange column, so that the resin saves energy, is pollution-free, generates no waste, and represents an environment-friendly technological product.

Description

technical field [0001] The invention belongs to the technical field of polymer ion exchange resins, and relates to a preparation method of an inorganic silica gel chelating ion exchange resin, in particular to a preparation method of an inorganic silica gel chelating ion exchange resin. Background technique [0002] As a strategic metal, nickel is widely used in alloy manufacturing, electroplating, nickel-metal hydride batteries and catalysts and other fields. Although 65% of nickel resources are stored in oxide ore (laterite), more than 70% of nickel products come from sulfide ore. At present, the hydrometallurgy of laterite ore has attracted more and more attention, including the three major processes of leaching of laterite ore, extraction of nickel leachate, and electrowinning of nickel. Leaching mainly includes ammonia leaching, sulfation-roasting leaching, atmospheric pressure acid leaching and high pressure acid leaching. Acidic leachate extraction usually uses carb...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J45/00C08G83/00
CPCB01J45/00C08G83/001
Inventor 李宾
Owner 李宾
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