摘要
采用真空间歇精馏方法对从1,4丁二醇(BDO)生产残液中提取BDO的精制过程进行了研究。通过考察塔顶真空度、回流比和加热负荷等操作因素对分离效果的影响,确定了适宜的操作条件,塔顶压力为700 Pa,釜温在160～170℃之间,采用变回流比操作。结果显示,产品BDO的质量分数达到99.5%以上,收率80%以上。这种方法操作稳定可靠,便于控制,为工业化生产奠定了基础。
Purification of production residue of 1,4-butanediol by vacuum batch distillation was studied.The vacuum of overhead,reflux ratio and heating load of the refining process were investigated.The suitable operating conditions of the refined process were obtained.Under the experimental conditions,the pressure of overhead was at 700 Pa,temperature of the bottom ranging from 160 ℃ to 170 ℃ and the whole process operating with variable reflux ratio.The results showed that the purity of final product（mass fraction） was more than 99.5% and the distillation yield was more than 80%.The method is stable,convenient for control and easy to be realized in industrialization.
出处
《化学工业与工程》
CAS
2011年第5期41-44,共4页
Chemical Industry and Engineering
关键词
1
4-丁二醇
残液提纯
真空间歇精馏
1
4-butanediol
purification of residue
vacuum batch distillation
