Is sodium hydroxide used for propylene oxide in China?

In domestic propylene oxide production, calcium hydroxide is typically used as a catalyst; sodium hydroxide can also be used, but this is less common, as its use may lead to an increase in side reactions and affect product quality. The specific production methods may vary from company to company. .

Your sentence is so incomplete – who knows what you mean? Do you refer to its bactericidal effect or some other effect?

The OP’s question is a bit abrupt, but the friend on the second floor doesn’t know much either about the traditional production methods for propylene oxide. The original poster is referring to the process of producing propylene oxide using the chlorohydrin method, in which a base is used to remove hydrogen chloride and facilitate ring formation; this reaction involves saponification using lime or caustic soda. Nowadays, this process has been largely replaced by direct or indirect oxidation methods. In the chlorohydrin method, saponification is carried out using either caustic soda or lime, and the results are similar; however, the lime method involves the handling of calcium chloride, while the caustic soda method involves the handling of sodium chloride. There would be significant advantages if this propylene oxide production plant were combined with an ion-exchange membrane caustic soda plant.