More pure of oil through hexane?

So im planing on using hexane for making hash oil so that i can resist ill the solevent and save money and the environment. My plan so far is to do a 20 min wash of trim in hexane place in a glass bottle leading to a Teflon hose wich will run through an ice bath to a collection device. I plan on re-dissolving in ethanol and winterizing before the final purge. Im new to extractes. Does anyone see any flaws? What kind of filter is best for removing the chlorophyll in the winterizing process?