匹可硫酸钠的合成工艺改进
x
请在关注微信后,向客服人员索取文件
篇名: | 匹可硫酸钠的合成工艺改进 |
TITLE: | |
摘要: | 目的:改进匹可硫酸钠的合成工艺。方法:通过改变反应溶剂、加料方式、精制方法和形成结晶水等方法对匹可硫酸钠的合成工艺进行改进。以苯酚为起始原料,与2-吡啶甲醛缩合制得4,4′ -(吡啶-2-基亚甲基)双苯酚,并考察其收率;然后经酯化、成盐,形成结晶水得到匹可硫酸钠,再考察其纯度。结果:关键中间体4,4′ -(吡啶-2-基亚甲基)双苯酚的收率达88%以上,精制后的产品纯度达99.5%以上。匹可硫酸钠一水合物稳定,单一杂质含量小于0.1%。结论:改进后的工艺简单、条件温和,适合大规模生产。 |
ABSTRACT: | OBJECTIVE: To improve the synthesis technology of sodium picosulfate. METHODS: The synthesis technology of sodium picosulfate was improved by changing reaction solvent, charging sequence, refined method and formation of crystal water. Using phenol as raw material, it was condensed with 2-pyridinecarboxaldehyde to achieve 4,4′ -(pyridin-2-ylmethylene) diphenol, and its yield rate was investigated. Sodium picosulfate was obtained after esterification, salification, formation of crystal water, and then its purity was determined. RESULTS: The yield rate of key intermediate 4,4′ -(pyridin-2-ylmethylene) diphenol reached above 88%, and the purity of refined products reached over 99.5%. Sodium picosulfate monohydrate was stable, and the content of single impurity was less than 0.1%. CONCLUSIONS: The improved technology is simple with mild conditions, and suitable for large-scale production. |
期刊: | 2017年第28卷第31期 |
作者: | 孙晋瑞,李丹,王洪臣,邓玉晓,杨利 |
AUTHORS: | SUN Jinrui,LI Dan,WANG Hongchen,DENG Yuxiao,YANG Li |
关键字: | 匹可硫酸钠;合成工艺;4,4′ -(吡啶-2-基亚甲基)双苯酚;改进 |
KEYWORDS: | Sodium picosulfate; Synthesis technology; 4,4′ -(pyridin-2-ylmethylene) diphenol; Improvement |
阅读数: | 503 次 |
本月下载数: | 14 次 |
* 注:未经本站明确许可,任何网站不得非法盗链资源下载连接及抄袭本站原创内容资源!在此感谢您的支持与合作!