利索-全球专利检索

  1. 登录
  2. 注册
发明授权
CN101353288B 一种催化重整重芳烃中β-甲基萘的分离方法 有权

一种催化重整重芳烃中β-甲基萘的分离方法
摘要：
本发明涉及一种从催化重整重芳烃中分离、精制β-甲基萘的分离方法，将干点为220-330℃重整重芳烃油和乙二醇利用精馏柱，在常压或真空度为0.0—0.073MPa下共沸精馏，收集142-191℃范围的馏分，得到甲基萘和乙二醇的混合物，用沉降法将甲基萘和乙二醇分离，将甲基萘在低温下结晶，离心分离，获得β-甲基萘，再经乙醇溶剂洗涤或在乙醇中重结晶，得到纯度≥99％的β-甲基萘；催化重整重芳烃与乙二醇重量比为1∶0.6-0.7；β-甲基萘结晶温度为：-18—0℃；β-甲基萘在溶剂中重结晶温度为-15—-10℃；本方法收集的甲基萘含量≥90％，收率达80％以上，β-甲基萘纯度可达到99.4％。
摘要（英）：

The invention relates to a separation method for separating and refining beta-methylnaphthalene from catalytically reformed heavy aromatics. The method comprises the steps as follows: azeotropic rectification is carried out on reformed heavy aromatic oil with the dry point of 220-330 DEG C and ethylene glycol by a rectifying column at the normal pressure or vacuum degree of 0.0-0.073MPa to collect distillates within the range of 142-191 DEG C, therefore, the mixture of the methylnaphthalene and the ethylene glycol is obtained; the methylnaphthalene and the ethylene glycol are separated by thesedimentation method, the methylnaphthalene is crystallized at the low temperature and centrifugated to obtain the beta-methylnaphthalene, the beta-methylnaphthalene is washed by an ethanol solvent or recrystallized in ethanol to obtain the beta-methylnaphthalene with the purity being equal to or more than 99%; the weigh ratio of the catalytically reformed heavy aromatics to the ethylene glycol is 1:0.6-0.7; the crystallization temperature of the beta-methylnaphthalene is -18 DEG C to 0 DEG C; and the crystallization temperature of the beta-methylnaphthalene in the solvent is -15 DEG C to -10DEG C. The content of the beta-methylnaphthalene collected by the method is equal to or more than 90%, the yield thereof is up to 80%, and the purity of the beta-methylnaphthalene is up to 99.4%.

公开/授权文献
0/0