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为找到一种有效去除环己酮精制过程中的杂质己醛和2-庚酮的工艺方法,以环己酮塔顶液为研究对象,用对杂质有吸附作用的HZSM-5分子筛作吸附剂,对含有己醛和2-庚酮等多种杂质的环己酮液体进行吸附研究,分别考察了分子筛的硅与铝摩尔比、吸附时间、吸附温度和吸附剂的添加量对己醛和2-庚酮吸附去除效果的影响。结果表明:硅与铝摩尔比为80的分子筛对己醛和2-庚酮的吸附效果最好,当分子筛质量与环己酮体积之比为0.08 g/mL、吸附温度和吸附时间分别为30℃和24 h时,己醛去除率达到99.47%,2-庚酮去除率达到100%,己醛的吸附等温线为上凸的Langmuir型曲线,而2-庚酮的为反Langmuir型曲线。
In order to find an effective process for the removal of hexanal and 2-heptanone from the cyclohexanone purification process, cyclohexanone was used as the research object. HZSM-5 molecular sieve with adsorptive effect on impurities was used as adsorbent , Cyclohexanone liquid containing many impurities such as hexanal and 2-heptanone were studied. The molar ratio of silicon to aluminum, adsorption time, adsorption temperature and the amount of adsorbent on molecular sieve were investigated. - Heptanone Adsorption Removal Effect. The results showed that the molecular sieve with the molar ratio of silicon to aluminum of 80 has the best adsorption effect on hexanal and 2-heptanone. When the ratio of zeolite mass to cyclohexanone volume is 0.08 g / mL, the adsorption temperature and adsorption time are 30 C and 24 h, the removal rate of hexanal reached 99.47%, the removal rate of 2-heptanone reached 100%, the adsorption isotherm of hexanal was convex Langmuir-type curve, and 2-heptanone was anti-Langmuir-type curve.