WCCE 10, World Congress of Chemical Engineering, Barcelona, Spain, 1.-5.10.2017, Renner, M., Tanning of leather without wastewater using compressed carbon dioxide | technical and industrial scale overview

EMSF, European Meeting on Supercritical Fluids, Essen, Germany, 9.-11.5.2016, Prokein, M., Renner, M., Weidner, E., CO2-intensified chromium contaminated wastewater free tanning of skins

EMChIE2015, European Meeting on Chemical Industry and Environment, Tarragona, Spain, Renner, M., 10.-12.6.2015, Free of water tanning intensified by CO2 | Parameter and scale-up study

10th AICLST, Asian International Conference on Leather Science and Technology, Okayama, Japan, 23.-26.11.2014, Renner, M., Weidner, E., CLEANTAN – zero sewage water chrome tanning intensified by CO2

ALCA-meeting, Pinehurst, USA, 19.-22.6.2013, Renner, M., Weidner, E., Geihsler, H., cleantan – chromium tanning without chromium and water residues

AQTCL, Puerto Vallarta, Mexico, 15.-18.11.2012, Renner, M., Weidner, E., Geihsler, H., Free of water chrome tanning – intensified by CO₂

13th EMSCF, The Hague, Netherlands, 15.-19.10.2012, Renner, M., Weidner, E., Geihsler, H., Heinen, T., Free of water tanning – intensified by CO₂ – Parameter and Scale up study

ISSF, San Francisco, USA, 14.-17.5.2012, Renner, M., Weidner, E., Geihsler, H., Heinen, T., Free of water tanning – intensified by CO₂ – Parameter and Scale up study

Invited Speaker, SLTC (Society of Leather Technologists and Chemists) Northhampton, England, 27.-29.4.2012, Renner, M., Weidner, E., CO₂ high pressure tanning

Invited Speaker, NATO ATC course, Huelva, Spain, 4.-7.10.2011, Renner, M., Weidner, E., New technologies in leather processing industry

12th EMSCF, Graz, Austria, 9.-12.5.2010, Renner, M., Weidner, E., Geihsler, H., High pressure tanning – new process principle from lab-scale to industry

Prosciba 2010, Natal, Brazil, 5.-9.4.2010, Renner, M., Weidner, E., CO₂ assisted processing in solid state – tanning of leather

Fluids, Frankfurt, 1.12.2009, Weidner, E., Renner, M., Effizienzsteigerung und Ressourcenschonung durch Einsatz verdichteter Gase / Naturstoffextraktion und Lederzurichtung

Equifase, Praia da Rocha, Portugal, 17. bis 21.10.2009, Renner, M., Weidner, E., Geihsler, H., Intensified and environmentally friendly tanning of animal skin

CISAP 3, Rome, Italy, 11.-14.5.2008, Renner, M., Weidner, E., Brandin, G., Sustainable and environmentally friendly production of leather

10th EMSCF, Barcelona, Spain, 4.-7.5.2008, Renner, M.; Brandin, G.; Schlüter, S.; Henning, T.; Weidner. E., High pressure impregnation – a sustainable way of producing advanced materials

GVC-Jahrestagung, Aachen, 10.-11.3.2008, Renner, M., Brandin, G., Weidner, E., Geihsler, H., Herstellung von Leder – Prozessintensivierung mittels CO₂

Formula V, Potsdam, 19.-22.11.2007, Renner, M.; Brandin, G.; Weidner, E.; Bertling, J., Impregnation of native and synthetic polymers with supercritical carbon dioxide

ECCE 6, Copenhagen, Denmark, 16.-21.9.2007, Weidner, E., Renner, M., Geihsler, H., Brandin, G., Production of leather under the influence of compressed carbon dioxide