Method for producing dioxolane

The invention discloses a dioxolane production method which comprises the following steps: respectively feeding a formaldehyde solution and ethylene glycol into a dioxolane reactor, and obtaining a dioxolane gas-phase crude product at the top of the dioxolane reactor under the action of a concentrated sulfuric acid catalyst; condensing the dioxolane gas-phase crude product, feeding the condensed dioxolane gas-phase crude product to a dioxolane concentration tower for primary separation of dioxolane and water, condensing the primarily separated dioxolane gas-phase crude product, feeding the condensed dioxolane gas-phase crude product to a dioxolane extraction tower for further water separation to obtain a dioxolane product, and rectifying the dioxolane product by adopting a dioxolane rectifying tower to obtain pure dioxolane. The method is simple in process, less in equipment, short in flow, high in reaction conversion rate, high in utilization rate, capable of overcoming the defects of a traditional alkali li