Imports In 2018, Kazakhstan imported $7.66k in Butene (butylene) and isomers thereof, becoming the 0th largest importer of Butene (butylene) and isomers thereof in the world. At the same year, Butene (butylene) and isomers thereof was the 0th most imported product in Kazakhstan. Kazakhstan imports Butene (butylene) and isomers thereof primarily from: N/A.