I am building a biodiesel reactor to convert french fry oil into diesel fuel to power my truck and hopefully a generator. Part of the biodiesel making process involves distilling excess methanol (which is expensive) out of the fuel. I will apparantly need about 23 Hg of vacuum. I am too cheap to buy a proper vacuum pump and am looking for a solution from the scrap yard where I normally do all my shopping. Would a refrigeration compressor, the kind that is not enclosed in a steel case that can't be disassembled without a cutting torch, be able to supply this vacuum? Is there a better solution, maybe fron the automotive scrap yard?
stan