Mesoporous adsorbent resin with uniform pore size and large specific surface area and preparation method and application thereof

Abstract

The invention relates to mesoporous adsorbent resin with a uniform pore size and a large specific surface area, which has a brown spherical structure. The particle size is 0.3-1.0mm, and the pore size is 5-10nm. The preparation method comprises the steps of: dissolving polyvinyl alcohol in water to prepare an aqueous phase; mixing benzoyl peroxide as an initiator, a total monomer phase made via mixing of styrene and divinylbenzene as a crosslinking agent, a pore making agent with mixture of methyl cyclohexane and toluene to prepare an oil phase; and adding the aqueous phase into the oil phase to prepare matrix resin; adding xylene dichloride (XDC) and ferric chloride for reaction after swelling, filtering to obtain resin, cleaning and drying to obtain the target product. The invention has the advantages that: the specific surface area of the adsorbent resin is large, the pore size is concentrated in the mesoporous area, resin holes are distributed uniformly and have the single peak characteristics, the capacity for adsorption of relatively large dye molecules is high, and the equilibrium of adsorption can be achieved faster. The process of the preparation method is simple, the cost is low, and the preparation method has broad prospects for application in dye wastewater treatment.

Description

【Technical field】 [0001] The invention relates to a synthesis method and application of a polymer adsorption resin, in particular to a high specific surface mesopore adsorption resin with uniform pore size, a preparation method and application. 【Background technique】 [0002] Adsorption and separation technology plays a very important role in scientific development and industrial production. Over the years, people have been conducting extensive and in-depth research on adsorbents. With the rapid development of the polymer industry and the increasing demand for polymer chemical products , polymer adsorbents have shown an irreplaceable role in different fields such as wastewater treatment, pharmaceutical industry, chemical industry, analytical chemistry, clinical testing and treatment due to their good performance and low price. Among them, macroporous adsorption resin has been widely used due to its high physical and chemical stability, good selectivity, fast adsorption speed...

AI Technical Summary

Problems solved by technology

At present, dyes are mainly based on aromatic hydrocarbons and heterocyclic compounds, and have chromogenic groups and polar groups. The structure is becoming more and more complex, and the performance is becoming more and more stable, which brings more difficulties to the treatment of printing and dyeing wastewater.

With the successful development of structurally improved ion exchange resins, adsorption resins and composite functional resins, resin adsorption methods have been widely used in the treatment and recycling of chemical wastewater, but there are relatively few researches and applications in the treatment of dye wastewater. Because dye molecules are generally large in size, traditional macroporous resins have good adsorption kinetic properties, but the adsorption capacity is low. Although the current commercialized post-crosslinked resins have a large specific surface area, their micropore distribution is uniform. On the one hand, larger dye molecules cannot diffuse in; on the other hand, even if they enter the resin pores, there will be greater mass transfer resistance, and the diffusion speed will be slower. However, the dye wastewater treatment process generally has a large amount of treatment, and the diffusion kinetics Often a key factor constraining processing costs