Method for producing t- butanol isobutanol, a method for producing methacrolein and methacrylic acid from isobutanol, and their manufacturing devices

To prepare the raw material for efficiently methacrylic resin from isobutanol, a step (2) to obtain a hydrated and t- butanol obtain butenes by dehydration of isobutanol step (1) and its butenes method for manufacturing methacrolein and methacrylic acid having a step (3) further the t- butanol dehydration and oxidation obtain methacrolein and methacrylic acid; production method of t- butanol and their steps (1) to ( 3) device for performing is disclosed.