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- Masliyah, J., Wallwork, V. and Z. Xu, Oil assisted (oily bubble) bitumen flotation process in oil sands extraction, 2012, Canadian Patent 2,421,471.
- Kuznicki, S., Kelly, D., Mitlin, D. and Z. Xu, Mercury adsorption using zeolite supported metallic nanodots, PCT WO2008/070988 A1, 2007; US patent Application 2010/0050868.
- Xu, Z., Liu, J. and Z. Zhou, Reactive oily bubble carriers in flotation processes and methods of generation and uses thereof, 2005, US Patent 6,959,815.
- Beetge, J.H., Kasongo, T., Komishke, B., Li, H., Long, J., Masliyah, J., Venter, J., Wang, S. and Z. Xu, Processing aids for enhanced hydrocarbon recovery from oil sands, oil shale and other petroleum residues, 2005, PCT WO 2005/028592 A1.
- Choung, J., Szymanski, J. and Z. Xu, Process for treating fine coal particles, 2004, US Patent 6,767,465 (licensed to Energy Pacific, USA).
- Xu, Z. and Y. Gu, Magnetic nano particles for bioseparation applications, 2003, PCT 03/005029 A2.
