EP 2656905, M. Horn, B. Helpap, M. Thiel, M. Neumann, "Entquickung von Lösungen durch Ultrafiltration", published 2013-10-30, assigned to Evonik Degussa GmbH
US 20140148614, D. Schneider, K.-D. Mohl, M. Schäfer, J. Paschold, J.H. Teles, S. Rittinger, "Process for preparing methyl formate by reaction of methanol with carbon monoxide in the presence of a catalyst system comprising alkali metal formate and alkali metal alkoxide", published 2014-05-29, assigned to BASF SE
B.N. Pattanaik (2013), "The advances in processes and catalysts for the production of methyl formate by methanol carbonylation – a review", IJCPT, vol. 3, no. 2, pp. 55–70, ISSN2277-4807