Patent ID: 9169183
Filing Date: 2015-10-27
Classification: C07C,Y02P

Abstract:
1. A method for coproducing isobutene and ethyl tert-butyl ether (ETBE) from tert-butanol (TBA) mixture, wherein said method comprising steps: providing a catalytic distillation column, the first catalytic distillation column is distinguished into a rectification zone, a catalytic zone, and a stripping zone from the top down; feeding TBA mixture into the rectification zone of the first catalytic distillation column, wherein the TBA mixture including TBA and absolute ethanol or aqueous ethanol; feeding ethanol into the stripping zone of the first catalytic distillation column to make the total ethanol-to-TBA molar ratio of the first catalytic distillation column is 0.1-2.0; and catalyzing the TBA mixture and the ethanol in the catalytic zone of the first catalytic distillation column to make the dehydration of the TBA of the TBA mixture and the etherification of the TBA with ethanol occur simultaneously, and isobutene and ETBE so that co-produced, wherein the concentration of the absolute ethanol or the aqueous ethanol in the TBA mixture is 2-30 wt %, and wherein the concentration of ethanol in the aqueous ethanol is more than 80 wt %.