摘要
以大庆石油化工总厂炼油厂催化柴油为原料 ,通过精馏分离得到二甲基萘 (DMN)窄馏分 (2 5 8~ 2 70℃ ) ,经糠醛溶剂抽提 ,减压蒸馏后 ,在 -10~ -2 5℃冷冻 2~ 5h ,离心分离制得纯度约 80 %的粗 2 ,6 DMN ,再经无水乙醇在 -10~ -2 5℃重结晶 ,得到纯度大于等于 98%的 2 ,6 DMN。
Narrow fraction of dimethyl naphthalene(b.r. 258270 ℃) was obtained from cat. diesel oil of Daqing refining and chemical Co. refinery through rectification, and raw 2,6 Dimethyl naphthalene with purity 80% was obtained from this fraction through furfural extraction, vac. distillation refrigeration(-10-25 ℃, 25 h) and centrifugal separation. Then high purity (≥98%) 2,6 dimethyl naphthalene was obtained through recrystallization with absolute alcohol.
出处
《精细石油化工》
CAS
CSCD
北大核心
2002年第5期26-28,共3页
Speciality Petrochemicals
关键词
催化裂化
柴油
分离
高纯度
2
6-二甲基萘
精馏
糠醛抽提
冷冻
重结晶
cat. diesel oil
2,6 dimethyl naphthalene
rectification
furfural extraction
refrigeration
recrystallization