基本信息:
- 专利标题： 一种用单一溶剂制备3,5-二叔丁基-4-羟基苯甲酸的方法
- 专利标题（英）：Method for preparing 3,5-di-tert-butyl-4-hydroxybenzoic acid by using single solvent
- 申请号：CN201910123459.3 申请日：2019-02-18
- 公开(公告)号：CN109796331A 公开(公告)日：2019-05-24
- 发明人： 王永胜 , 陈靖 , 刘荣
- 申请人： 甘肃省化工研究院有限责任公司
- 申请人地址： 甘肃省兰州市城关区古城坪1号
- 专利权人： 甘肃省化工研究院有限责任公司
- 当前专利权人： 甘肃省化工研究院有限责任公司
- 当前专利权人地址： 甘肃省兰州市城关区古城坪1号
- 代理机构： 甘肃省知识产权事务中心
- 代理人： 张克勤
- 主分类号： C07C65/03
- IPC分类号： C07C65/03 ; C07C51/15 ; C07C51/02 ; C07C39/235 ; C07C37/66
The invention discloses a method for preparing 3,5-di-tert-butyl-4-hydroxybenzoic acid by using a single solvent, and belongs to the field of fine chemical engineering. The method solves the problemsthat in the prior art, the conversion rate is not high and the production energy consumption is large are solved. According to the method, 2,6-di-tert-butylphenol is used for preparing phenolate through a sodium hydroxide aqueous solution and a xylene reflux water diversion technology. Meanwhile, the same solvent, namely xylene, is used for a Kolbe-Schmitt reaction, and carboxylation is carried out on the phenolate. The conversion rate of the phenolate is increased to 95% or above. According to the whole process, the single solvent, namely xylene, can be effectively separated and recycled, post-treatment is easy, the production cost is reduced, and emission of three wastes is reduced.
IPC结构图谱:
| C | 化学；冶金 |
| --C07 | 有机化学 |
| ----C07C | 无环或碳环化合物 |
| ------C07C65/00 | 有羧基连接在六元芳环的碳原子上，并有羟基、氧—金属基、醛基、酮基、醚基、COOC基、COOCOC基或COOCOCOC基中任何基团的化合物 |
| --------C07C65/01 | .含有羟基或氧—金属基 |
| ----------C07C65/03 | ..单环的所有羟基或氧—金属基都连接在环上 |