新型吸附剂——球形碳化树脂的研究Ⅱ

INVESTIGATION OF A NEW TYPE OF ADSORBENT——SPHERICAL CARBONACEOUS ADSORBENT (Ⅱ)

高温下直接裂解苯乙烯-二乙烯苯共聚物小球时,因热分解而得不到球形碳化树脂。用浓硫酸处理后,树脂内磺酸基与邻近苯环发生了脱水反应,形成稳定的砜基,从而提高了树脂耐热性,裂解后得到球形碳化树脂。 高温下,微量氧、水蒸汽等被碳化树脂吸附后,使树脂发生活化作用,将一部分闭孔打开,增加树脂的毛细孔,改变了它的孔结构。

Under high temperature, dehydration occurs between the sulfonyl group of Resin 4006-170 and the benzene ring resulting in the formation of sulfone groups which are more stable toward heat than that of Resin 4006.At higher temperature, a trace of reactive gases, such as oxygen, water vapor, etc. is adsorbed by and reacts with the carbonaceous adsorbent at the active point C* to produce CO, CO, and H,. As a result of this, the closed ppres become open, and the surface area and porosity of the carbonaceous absorbent are increased gradually-Therefore, the activation process increases the rate and efficiency of the adsorption.