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Preparation method of condensation type beaded salicylic acid derivative boron-specific chelating resin

A technology of salicylic acid derivatives and chelating resins, which is applied in the ion exchange of chelates, chemical instruments and methods, ion exchange regeneration, etc., can solve the problems of low cost, difficult synthesis process, and few synthesis steps, and achieve Easy to implement, simple process, and conducive to large-scale promotion and application

Active Publication Date: 2013-06-12
NANKAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0011] Substances containing ortho-hydroxycarboxylic acid functional groups, such as salicylic acid, are directly used as monomers, and the resins prepared by phenolic condensation reaction often contain higher functional groups, and the synthesis steps are few and the cost is low. However, due to the difficulty of the synthesis process , Most of the salicylic acid polycondensation resins reported in the past are not beaded

Method used

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  • Preparation method of condensation type beaded salicylic acid derivative boron-specific chelating resin
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  • Preparation method of condensation type beaded salicylic acid derivative boron-specific chelating resin

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Embodiment 1

[0036] A preparation method of polycondensation type beaded salicylic acid derivative boron chelating resin. The boron chelating resin has two hydroxyl groups on the benzene ring, and uses 2,4-dihydroxybenzoic acid as a functional monomer and phenol It is a ternary copolymer resin (DPF Sphere) prepared by inverse suspension polycondensation method with concentrated hydrochloric acid (AR) as a catalyst, ethylene glycol or ethylene glycol monomethyl ether as a porogen, and the steps are as follows:

[0037] 1) Preparation of prepolymerized pulp:

[0038] At room temperature, 0.61g of phenol and 11.57g of a 38% by mass formaldehyde aqueous solution were mixed and stirred uniformly, and then reacted at 50±2oC for 2h to obtain a phenolic resin prepolymer. Add 10.0g2 to the prepolymer. 4-dihydroxybenzoic acid, 20g ethylene glycol, stir evenly to obtain prepolymerized slurry;

[0039] 2) Inverse suspension polycondensation reaction:

[0040] In a 500mL three-necked flask equipped with a st...

Embodiment 2

[0045] A preparation method of polycondensation type beaded salicylic acid derivative boron chelating resin. The ingredients and preparation steps are basically the same as those in Example 1, except that the dispersed phase is mixed with 150g liquid wax, 50g tetrachloroethylene and 2.15g Span80. Evenly composed. The boron adsorption capacity of the prepared resin was determined to be 1.18 mmol / g. .

Embodiment 3-8

[0047] The preparation method of a group of polycondensation type beaded salicylic acid derivative boron chelating resin, ingredients and preparation steps are basically the same as in Example 1, except that the ratio of functional monomer to crosslinking agent is different, as shown in Table 1. The resin of Examples 3-8.

[0048] Table 1 Resins prepared by functional monomers 2,4-DHB, formaldehyde and different amounts of crosslinking agent phenol

[0049]

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Abstract

The invention discloses a preparation method of condensation type beaded salicylic acid derivative boron-specific chelating resin. The boron-specific chelating resin has two hydroxyl groups on a benzene ring and is a vinyl acetate monomer (DPFSphere) prepared by taking 2,4-dihydroxy-benzoic acid as a functional monomer, taking phenol as a cross-linking agent, taking concentrated hydrochloric acid (AR) as a catalyst and taking glycol or ethylene glycol monomethyl ether as a pore-foaming agent through a reversed phase suspension polycondensation method. The preparation method has the advantages that the particle size of the boron-specific chelating resin is 0.1-1.0mm; boron is absorbed from a boron-contained water solution by using the beaded resin, and the maximum absorption capacity of the boron-specific chelating resin in the boron-contained water solution is 1.2-1.4mmol / g; the boron-contained water solution is adjusted to a neutral or alkaline solution with a pH value of 8-10, which is beneficial to the absorption of boron; the absorption of boron cannot be influenced when the concentrations of alkali metal and alkali metal ions are 0.01-0.2mmol / L; and the preparation method is simple in process and easy to implement and is beneficial to large-scale popularization and application.

Description

【Technical Field】 [0001] The invention relates to the preparation of boron chelating resin, in particular to a method for preparing polycondensation type beaded salicylic acid derivative boron chelating resin. 【Background technique】 [0002] Boron is a trace element necessary for the growth of animals and plants, and it is also an important raw material in industrial production. Boron and its compounds have been widely used in energy and chemical industry, agriculture, medicine, electronics and other sectors. The wastewater discharged from boron mines and boron industrial production contains different levels of boron. The loss of boron not only causes waste of resources and environmental pollution, but long-term exposure is also harmful to human health. [0003] The extraction and recovery of boron resources from the solution system is extremely important. Among a variety of methods for separating boron, the resin method in the adsorption method has been widely used because of it...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G8/24C08J9/28B01J45/00B01D15/08
Inventor 范云鸽施荣富于士平薛函王蓉俞婷婷
Owner NANKAI UNIV
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