High purity isobutene by the new process for preparing tert-butanol

The present invention belongs to the field of chemical industry, relates to a basic organic chemical raw materials - Preparation of isobutylene, t-butanol specific preparation of high purity isobutene by the new process. The process used for various vapor phase catalytic isobutene tert-butanol production apparatus. Characterized in that the unique structure of vaporization and stripping processes, the choice of low levels of industrial tert-butanol as starting materials, the unique combination of isobutylene and a rectification column, rectification column bottom liquid can be directly input to achieve vaporization stripper recovery tert-butanol and the object of the separation process wastewater; a further feature of the invention that the crude product without isobutene condensed directly into the rectification column purification, this process may be further vaporization energy in the above process based on the stripper.