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Concentration 2019
May 31, 2019, Pala, USA
Concentration 2019
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OSN Membranes Give You Bang for Your Bud
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About the talk

The presentation will focus on how Evonik's OSN (Organic Solvent Nanofiltration) membranes are being increasingly applied to the CBD/THC extraction and purification processes. These polymeric membranes have a pore size in the range of 150Da (Molecular Weight) to 900Da. Membranes of particular pore size can be chosen to achieve a certain separation, e.g. a membrane of 500 Da MWCO (Molecular Weight Cut-Off) can be used to separate large molecular weight impurities from CBD. This eliminates the need for chilled ethanol extraction and also winterization. Additionally, it achieves substantial color reduction.
Subsequently, a membrane of 200 Da MWCO can be used to concentrate (desolvate) the CBD solution. This membrane rejects (retains) CBD and allows ethanol and terpenes to pass through thus eliminating the need for using rotary evaporators.
The OSN membranes are operated at ambient temperature thus saving substantially on energy and also ensuring heat sensitive molecules are not damaged. Evonik's OSN membranes are the only membranes in the market that are stable to the typical solvents used in the CBD/THC extraction

03:35 Evonik at a glance

04:15 OSN Solvent Resistant

05:12 OSN membrane technology

06:00 Spiral wound module flow schematic

07:55 OSN in natural oils

10:14 ABC known extraction routes

12:06 OSN in ABC processing

15:56 Benefits of OSN in ABC processing

19:20 Next steps

22:30 Membranes

28:35 Concentration

About speaker

Kumar Abhinava
Technology Director at Evonik Corporation

Dr. Kumar Abhinava is currently Technical Director for Evonik’s OSN (Organic Solvent Nanofiltration) Membrane applications development. Kumar holds a PhD in Chemical Engineering from UMIST (Manchester U.K.) and an MBA from University of Warwick, U.K. Kumar has nearly 30 years of experience and has served various senior technical and management roles with leading specialty chemicals (ICI, Zeneca) and pharmaceutical companies (AstraZeneca and Eli Lilly) in U.K. and U.S.A. Kumar has led the successful development, scale-up and commercialization of several products and processes with particular expertise in process development, technology selection and process scale-up of separation processes. Kumar developed several nanofiltration and ultrafiltration processes for the companies he worked for. With his current role, he has helped developed several OSN membrane processes for a wide variety of process chemistries. One of the most interesting applications he has developed in the last 1.5 years is that of applying OSN membranes in purification and concentration of CBD from Hemp and THC from Cannabis – eliminating several high cost unit operations (e.g. Winterization, Color Removal, Rotavaps etc.) and improving the product quality.

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