艺术
美容与健康
工艺
文化与历史
娱乐
环境
食品与饮料
逆向工程
科学
体育
技术
可穿戴设备
Tetrahydrofuran from Caustic-Washed Furan Hydrogenated over Nickel on Kieselguhr (Banford and Manes, du Pont, US 2,846,449)
Furan from furfural carries a little carbon dioxide and water that distilling does not remove, and they hold back the hydrogenation. Banford and Manes washed the furan with dilute potash first; then nickel on kieselguhr turned nearly all of it into tetrahydrofuran.
Result: tetrahydrofuran, conversion raised from 85-90 % to 97 %.
Source: Banford and Manes, US 2,846,449 (du Pont, 1958), Example 1. Not given: how the THF is drawn off. Picture drawn by Youblob.
高级
1 day
说明
1
1
Make the caustic wash
Make the caustic wash
Make 10 % potassium hydroxide in water.
所需工具：
氢氧化钾
水2
2
Wash the furan
Wash the furan
Pass distilled furan up through the caustic in a column packed with porcelain saddles, then let suspended caustic settle out. Ours at small scale: shake in a separatory funnel and draw off the caustic.
此步骤所需材料：
呋喃1 as required所需工具：
带活塞的分液漏斗3
3
Hydrogenate
Hydrogenate
Heat the washed furan and feed it with hydrogen to a hydrogenator holding active nickel on kieselguhr at 85-100 C and about 500 psi gauge.
此步骤所需材料：
氢1 as required所需工具：
硅藻土载镍催化剂
压力反应器
压力表
温度计4
4
Check the conversion
Check the conversion
Washed furan gives about 97 % tetrahydrofuran; unwashed only 85-90 %. Raising the feed to 105 C does not help unwashed furan.
此蓝图制作
相关蓝图
这些蓝图共享知识——技术、材料或原理
CC0 公共领域
此蓝图以 CC0 协议发布。你可以自由复制、修改、分发和使用此作品，无需征得许可。
通过购买蓝图中的产品支持创客，他们将获得 创客佣金 （由供应商设定），或创建此蓝图的新版本并将其作为连接包含在你自己的蓝图中以分享收入。