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SLCDBD last won the day on January 31 2019

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  1. vapor extraction is high efficiency. it's tough to get a balanced run without getting nasty terpenes in your collection. liquid-solid extraction is a lot easier to manage IMHO, and yields are much higher when you distill the macerate carefully.
  2. take care with your end-hearts fraction. it gets hot due to the methanol concentration increasing from azeotropic release.
  3. As someone that is primarily concerned with process efficiency (and especially process simplicity) here's why I was always turned off by arroyo's patent method: It basically plays with fire. When you are basing your method on using fractions 2, 3,4, 6, and 8 (that's probably wrong, just used as an illustrative example) you open up your product to variation via human error. As we all know volatilities of organics change depending on the relative composition of the complex mixture. It's well and good to say "well, Raffie Arroyo did it, so can you all" but expecting to not make cut point errors in such a complex cutting scenario is unrealistic at a production scale. I'm sure the birectifier provides insight into that, but I have to ask... is it valid information if your production scale equipment doesn't have exactly the same capabilities? Maybe Arroyo had the infrastructural resources to conduct his method flawlessly. Maybe he didn't and the patent was a panacea to enfranchise his company's lawyers to sue competitors that had a similar flavor profile to theirs. Who knows. All I know is that understanding the process of how esters are formed in the still from constituent products that result from fermentative biology (and conversely how they break apart via hydrolysys when the concentration of alcohol is reduced during proofing) is essential to understanding how the flavors in great rums are created. Strong acids, alcohols interacting with carboxylic acids and long durations of reflux are how these esters are created... and whether or not you have a birectifier doesn't really enable you nor does it prevent you from making these flavors present in your finished product. I must say that I'm very motivated by @bostonapothecary's body of work and it made a huge impact on my development as a distiller. Thank you sir! I'm reminded of 'lost spirits' and how they said they could make 30 year rum in 30 minutes, but couldn't present a rum under 120 proof that had a heavy ester load. That's because they were trying to sell 'accelerated aging' licenses to their so-called 'proprietary technology' which was really just a combination of a hot-process oak product extraction vessel and a large lab still that didn't do a great job of fischer esterification. They were banking on people that didn't take an o-chem class being willing to spend a lot of money on some magical way to print money. Speaking from experience... anyone interested in these topics should download some lab procedures for fischer esterification and do the work. You'll learn a lot.

    Aging Rum

    We are going to market soon with a rum that's aged in cab sauv barrels that underwent no aggressive swelling prior to our refill and all the remnants from the previous fill are significantly impacting the flavor profile. It's pretty tasty.
  5. Once I started working through fischer esterification labs the merits of sulfuric acid as a pH lowering additive became very clear and I've never looked back! Anyone doing high rye fermentations (90%+) should try sulfuric. really cool lactic esters result.
  6. This is one of those 'defects' that distillers notice but the market doesn't give a flying f about, so nobody figures out what is going on. If I were to guess I would bet that it's higher weight oils that have significant enough partial pressure to get into vapor phase but upon condensing stick to the interior of the neck until disturbed due to their viscosity. Just a guess.

    Sourcing Molasses

    Breaking apart a tanker of molasses doesn't sound like a very fun afternoon.
  8. Yeah, my first thought was he was shitfaced and meant to say that raising the alkalinity of your proofing water is helpful, but some garbage came out instead
  9. 99% of the time this is an issue the bottling crew is overfilling the bottles. If you aren't already do intermittent fill level tests. If you are using cheap chinese bottles, it's important to know ahead of time that the neck ID varies a lot compared to good quality european or USA glass in my experience. Sometimes cheap glass has soot or other schmutz that lubricates the neck-internal surface. rinsing your bottles before filling can fix this issue. Shrinks are really good at preventing t-tops from popping at high elevations/higher temperatures than what the product was bottled at. I've had mixed results with the 'vent groove' synthetic shank t-tops.
  10. I can process about 3 gpm of grain in (flour spec) whiskey mash / 3.5 gpm rum wash in my 12" D 28' H vendome stripping column. Taking the stripping burden off your batch still frees up a lot of spirit output. Vendome does great work. Can't go wrong with them.
  11. What a cool setup. I'm curious, on the dephlegmation vertical riser that appears to be an allihn condenser connected to a claisen and that coiled glass space with thermometer connection: Is that a dead air space, or is it connected to a heat exchange fluid circuit of some kind?
  12. Whatever you want. You might want to read this: https://drive.google.com/open?id=0B1AlINP9_IL6TlVjeWFKaGM3bEU
  13. re: louching: If you are doing your 'demisting' test (aka where you add water to your distillate to see if it louches) to 40% abv before collecting into your hearts receiver you shouldn't have louching at 46% under any circumstance, unless you have some source of contamination that's not being mentioned. You can make your 'heads' collection smaller by using less citrus peel since that concentrates in the heads. Coriander is a good citrus booster that allows you to use less peel and hence have less N, D-limonene which is the culprit in most louching gins. re: feints processing If you have high rectification equipment you definitely should be reprocessing your feints to as close to neutral as you can and reincorporating that into your next batch's maceration. Even if you can't hit true neutral I would redistill my gin feints and keep what doesn't have the 'wet dog / barnyardy' taints for re use. Depending on your equipment, If you can increase rectification on the fly you can get pretty good % yield by increasing rectification in stages as undesirable sensory characteristics present themselves. I usually get about 85-90% yield on a proof gallon basis by doing this.
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