RETRACTED: Silica supported microporous melamine tri sulfonic acid catalyst towards biodiesel fuel production from waste cooking oil and utilization of side stream

The article has been retracted: please see Elsevier Policy on Article Withdrawal (http://www.elsevier.com/locate/withdrawalpolicy).The article has been retracted at the request of the Editors because of forgery. Figures S7 and S8 in the paper under question appear identical to those published by the same authors in the following publications:Figures 5 and 6 in the paper: “An experimental investigation into methyl laureate production via direct esterification of solid fatty acid by using amylum sulfuric acid: an efficient, biodegradable, and recyclable solid acid catalyst”, by Mehulkumar L. Savaliya, Bharatkumar Z. Dholakiya, Research on Chemical Intermediates (Received 5 Oct. 2014 and accepted 28 Nov. 2014) http://dx.doi.org/10.1007/s11164-014-1548-2.Figure S6 and S7 in “A notice on newly synthesized silica-induced boron trisulfonic acid catalyst towards biodiesel synthesis from refined soybean oil”, by Mehulkumar L. Savaliya, Bharatkumar Z. Dholakiya, Research on Chemical Intermediates, Received: 5 October 2014/Accepted: 28 November 2014, http://dx.doi.org/10.1007/s11164-014-1885-1.The mentioned pictures were claimed to relate to different samples and used in the discussion of results.