Synthetic method of pollution-resistant deeply-softened chelating resin

A technology of chelating resin and synthesis method, which is applied in the direction of chemical instruments and methods, other chemical processes, water/sewage treatment, etc., can solve the problems of resin pollution, weakening of working exchange capacity of chelating resin, blockage of channels, etc., and achieve improved durability High temperature characteristics, improved total exchange capacity and working exchange capacity, good oil resistance effect

Active Publication Date: 2015-11-11
TONGJI UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when dealing with sewage containing a large amount of background substances such as humic acid and soluble animal and vegetable oils, ordinary chelating resins are used for deep softening. The chelating resins are easily blocked by dissolved organic matter and cannot leach heavy metal ions in a complex state. The working exchange capacity of the chelating resin is greatly weakened, causing irreversible pollution to the resin

Method used

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Examples

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preparation example Construction

[0024] The present invention is aimed at the prior art, when the sewage containing a large amount of background substances such as humic acid and soluble animal and vegetable oil is deeply softened with common chelating resin, the chelating resin will be blocked by soluble organic matter and cannot be leached out. The heavy metal ions in the complex state greatly weaken the working exchange capacity of the chelating resin and cause irreversible pollution to the technical problem of the resin. It provides a kind of deep softening treatment for water containing more dissolved organic matter and humus background substances. A method for synthesizing a pollution-resistant deep softening chelating resin. The method includes the following steps:

[0025] a) Prepare the oil phase in the oil phase preparation kettle. The oil phase is composed of reactants, porogens and initiators; add the reactants and porogens into the oil phase preparation kettle at a mass ratio of 1:0.5 Mix, and a...

Embodiment 1

[0057] A kind of synthetic method of anti-pollution type depth softening chelating resin, this synthetic method comprises the following steps:

[0058] a) Prepare the oil phase in the oil phase preparation kettle, the oil phase is composed of the reactant, isobutanol and benzoyl peroxide; add the reactant and isobutanol to the oil phase at a mass ratio of 1:0.5 for preparation Mix in the kettle, and add benzoyl peroxide to make it fully dissolved in a proportion of 1% of the total mass of the oil phase, and then stabilize it in the oil phase preparation kettle for 30 minutes to form an oil phase; wherein: the reactant is styrene mono Body and by divinylbenzene crosslinking agent; and the mass ratio between styrene monomer and divinylbenzene crosslinking agent is 1:0.2, in the crosslinking agent of 0.2 mass ratio, can be completely divinylbenzene crosslinking agent, It can also be based on divinylbenzene crosslinking agent, with other auxiliary crosslinking agents added;

[00...

Embodiment 2

[0067] A kind of synthetic method of anti-pollution type depth softening chelating resin, this synthetic method comprises the following steps:

[0068] a), prepare the oil phase in the oil phase preparation kettle, the oil phase is composed of reactant and 4-methyl-2-pentanol and isobutanol, the mixture of the porogen formed by hexamethyldisiloxane and 2-ethane The composition of the initiator mixture composed of hexanoic acid and toluyl peroxide; the reactant and the mixture constituting the porogen are added to the oil phase preparation kettle in a mass ratio of 1:0.5 and mixed, and the total mass of the oil phase is Add 1% of the proportion of the initiator mixture and make it fully dissolved, and then stabilize it in the oil phase preparation kettle for 30 minutes to form the oil phase; wherein: the reactant is styrene monomer and the crosslinking agent made of divinylbenzene and the mass ratio between styrene monomer and divinylbenzene crosslinking agent is 1:0.2, and in ...

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Abstract

The invention discloses a synthetic method of pollution-resistant deeply-softened chelating resin. The synthetic method comprises the following steps: preparing an oil phase by adopting a styrene monomer, a divinyl benzene crosslinking agent, a pore-foaming agent and an initiating agent; preparing a water phase by adopting water, a dispersant and NaCl; adding the oil phase into the water phase, lowering the temperature after a temperature rising process, discharging, washing, extracting, drying and screening to obtain polystyrene series styrene-divinylbenzene copolymers of the pollution-resistant deeply-softened chelating resin; then performing chloromethylation reaction, and transforming to obtain polystyrene series chloromethylated beads; performing stirring expansion on the polystyrene series chloromethylated beads by using dichlorethane, adding N-hydroxymethyl phthalimide, dropwise adding a catalyst, heating, preserving the temperature, cooling, pumping out mother liquor, adding water, performing reduced pressure distillation, and cleaning; and adding 25% caustic soda liquid, heating, stabilizing, washing with water, adding a chloroacetic acid solution to perform chelation reaction, heating, preserving the temperature, washing with water, performing acid regulation, washing with water, performing alkali regulation, washing with water until the mixture is neutral, and discharging for package to obtain the pollution-resistant deeply-softened chelating resin.

Description

technical field [0001] The invention relates to the technical field of polymer material synthesis in the sewage treatment industry, in particular to a method for synthesizing a pollution-resistant deep softening chelating resin. Background technique [0002] Chelating resins are a class of Metal ion A cross-linked functional polymer material that forms a multi-coordination complex. The mechanism of the chelate resin to adsorb metal ions is that the functional atoms on the resin undergo a coordination reaction with the metal ions to form a stable structure similar to a small molecule chelate. Chelating resins have a stronger binding force with metal ions than ordinary ion exchange resins. During the deep softening process, the chelating resin can stably keep the concentration of calcium and magnesium ions in the effluent down to ppb level, which is the best choice for deep softening. However, when treating sewage containing a large amount of background substances such as h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F212/08C08F2/18C08F8/32C08F8/24C02F1/28B01J20/26C02F1/58
Inventor 董滨许颖沈丹妮
Owner TONGJI UNIV
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