Imports In 2018, Tajikistan imported $3.66k 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 Tajikistan. Tajikistan imports Butene (butylene) and isomers thereof primarily from: N/A.