Abstract
The authors contemplated to manufacture propylene glycol by catalytic and high pressure process.
In the high pressure procss, it was found that impurities contained in the propylene oxide have acidified the crude propylene glycol solution.
In the catalytic process, the optimum catalyst concentration was at 0.02%.
For continuous catalytic hydrolysis of propylene oxide to propylene glycol, using a multi-type reactor, four vessels were required to complete the reaction, and the catalyst was completely neutralized with alkali within 30 minutes at 90°C.
