%X In this article, reference 9 was incorrect. The original article has been corrected. © 2021, Springer-Verlag GmbH Germany, part of Springer Nature. %D 2021 %R 10.1007/s13399-021-01926-8 %N 6 %O cited By 0 %J Biomass Conversion and Biorefinery %L scholars14206 %T Correction to: Optimisation on pretreatment of kapok seed (Ceiba pentandra) oil via esterification reaction in an ultrasonic cavitation reactor (Biomass Conversion and Biorefinery, (2017), 7, 1, (91-99), 10.1007/s13399-016-0207-9) %V 11 %I Springer Science and Business Media Deutschland GmbH %A L.F. Chuah %A A. Bokhari %A S. Yusup %A J.J. Klemeš %A M.M. Akbar %A S. Saminathan %P 3071