As pressure grows on companies to reduce reliance on gas and oil, established processes even at industrial scales are being questioned, offering an opportunity for tech to step in. SepPure is looking to replace the complex gas-based distillation of oils with a membrane engineered at the nanometer scale, and its approach has attracted $12 million in a new funding round.
Oils of all kinds must be extracted and purified from their source, which might be a seed, fiber, or some other organic material. Of course you can crush an olive and get a lot of the oil out of it, but nowhere near all of it; to do that, the pulp is immersed in a massive amount of solvent, like acetone or hexane, which pulls out the remaining oil. The resulting mixture is then heated, usually via natural gas or oil, and the solvent and oil separate.
This fuel-intensive process has persisted for decades, partly because the high temperatures required preclude the use ...
