The Study On Resin Absorptive Performance For The Organic Impurity In The Phenol Refining Process

Phenol is widely used in chemical production.Most of the phenol all over the world ismade from isopropyl-benzene.The process to produce phenol due to side reactions a varietyof organic impurities can be formed. However, these impurities can not be removedcompletely after preliminary purification. In order to meets the demand for the furtherdownstream production which is based on phenol as raw material. To establish an efficientphenol refining process and a high sensitivity purity analysis method is very necessary.This article discusses the adsorption of industrial phenol by ion-exchange resin and solidphase micro-extraction (SPME) coupled with gas-chromatography mass spectrometry(GC-MS) for qualitative and quantitative analysis of organic impurities. It is known that theindustrial phenol contains mainly seven types of organic impurities, such as2-methyl-benzofuran,2,4-diphenyl-4-methyl–pentene,3-methyl-cyclopentylketone, m-cresol,etc. Theresults suggested that the content of organic impurities can be effectively controlled at theppb level through quantitative analysis of standard curve. The quantitative standard curve hasa good linear range and the result determined with the method in experiments has a relativestandard deviation less than2%.The method is precise and sensitive.In this study asmall-scale experimental device is established.The optimal mass ratio between the phenoland resin is2.5:1. After the adsorption by resin, the crystallization point and chromaticitymeet the requirements of high purity phenol. It shows that the method of analysis for theorganic impurities in industrial phenol is available. Ion exchange resin refining industrialphenol can effectively control the organic impuritise.