文献类型：期刊文献

中文题名：单季戊四醇与双季戊四醇的分离工艺

英文题名：Separation of Pentaerythritol and Dipentaerythritol

作者：李春香[1];王幸宜[1];胡广侠[2]

机构：[1]华东理工大学工业催化研究所,上海200237;[2]中国科学院上海微系统与信息技术研究所,上海200050

年份：2003

卷号：29

期号：1

起止页码：83

中文期刊名：华东理工大学学报（自然科学版）

外文期刊名：Journal of East China University of Science and Technology

收录：CSTPCD;;Scopus;北大核心:【北大核心2000】；CSCD:【CSCD2011_2012】；

语种：中文

中文关键词：分离工艺;结晶时间;单季戊四醇;双季戊四醇;颗粒度;结晶温度;结晶法

外文关键词：crystal; dipentaerythritol; pentaerythritol; separation; particle size

摘要：研究了单季戊四醇(Pentarerythritol,以下简称PE)、双季戊四醇(Dipentaerythritol,以下简称DPE)混合物的分离工艺。结果表明,在PE∶DPE=1.2∶1(mol∶mol)的条件下,PE与DPE的分离率不仅与结晶温度有关,而且结晶时间也有很大影响。30°C时,分离率随结晶时间的变化出现了最佳值,而0°C时分离率在一段结晶时间内保持不变,为80%左右;在0°C、30°C时,分离率随结晶时间出现极小值和极大值,这种复杂的关系与PE和DPE之间形成的复合物的种类有关。研究还表明,在分离过程中,DPE的结晶颗粒也发生了变化,结晶时间短,颗粒小,时间延长,小颗粒和大颗粒并存。
The separation technique of the mixture of pentaerythrito(PE)and dipentaerythritol(DPE)at the ratio 1.2∶1 was studied. The experiment results showed that the separation efficiency of PE and DPE related to crystalling temperature, and crystalling time had a great influece on it. At 30°C, the efficiency reached the optimum value when crystalling time was 16h, and it maintained constant at 80% for 16h at 0°C.Under the other separation conditions at the temperature between 0°C and 30°C, the efficiency occured the maximum and minimum values, which were due to the different compounds formed by PE and DPE. In addition, the particle size of DPE changed with crystalling time. The shorter the crystalling time, the smaller the size,and the larger one occured when crystalling time increased.