Guest guest Posted August 11, 2004 Report Share Posted August 11, 2004 <snip> deterioration (I cannot imagine that freezing per se > causes any problems other than minor separation issues). Err..... well that's absolutely incorrect. For example menthol is prepared by refrigeration from crude peppermint oil, anethole is removed from aniseed oil by freezing, cedrol separates from cedarwood oil by chilling, and eucalyptol (cineol) is prepared from eucalyptus oil by freezing. So these are pretty major changes, are they not? Tony www.tonyburfield.co.uk <http://www.tonyburfield.co.uk> Quote Link to comment Share on other sites More sharing options...
Guest guest Posted August 11, 2004 Report Share Posted August 11, 2004 > <snip> deterioration (I cannot imagine that freezing per se > > causes any problems other than minor separation issues). > > Err..... well that's absolutely incorrect. For example menthol is prepared by refrigeration from crude peppermint oil, anethole is removed from aniseed oil by freezing, cedrol separates from cedarwood oil by chilling, and eucalyptol (cineol) is prepared from eucalyptus oil by freezing. So these are pretty major changes, are they not? > > Tony > > www.tonyburfield.co.uk <http://www.tonyburfield.co.uk> > > Hey - you would know better than me! I would not argue the point that an oil in a separated state has undergone a major internal change. Still... this is just a separation issue, which (correct me if I'm wrong) solves itself with a little patience and warmth. To ME, this is a minor issue (unlike permanent chemical changes due to oxidation). Now this really boils down to the distinction between " minor " and " major " , which is silly because this is going to be a matter of our personal contexts, which are very different. Thanks for the input, though! I have always enjoyed the depth of knowledge you bring to the lists I frequent (lurk at most, I guess). BetaS Quote Link to comment Share on other sites More sharing options...
Guest guest Posted August 11, 2004 Report Share Posted August 11, 2004 On Wed, 11 Aug 2004 15:40:37 +0100, you wrote: > <snip> deterioration (I cannot imagine that freezing per se > > causes any problems other than minor separation issues). > > Err..... well that's absolutely incorrect. For example menthol is > prepared by refrigeration from crude peppermint oil, anethole > is removed from aniseed oil by freezing, cedrol separates from > cedarwood oil by chilling, and eucalyptol (cineol) is prepared > from eucalyptus oil by freezing. So these are pretty major > changes, are they not? Yes, correct, temperature is used to fractionate and separate components. I think the implication I inferred, is that once " frozen " then allowed to come back to room temperature and gentle mixing applied, the product should come back to it's original state. (In some cases a little heat may be required from a bain-marie to speed things up, but don't do this to delicate products like Rose, Jasmin, Tuberose, Jonquille, et al.) I think I did mention that there would be separation of components based on their individual congealing points. I also mentioned that the product needs to come to room temperature and gently mixed before using. It was a matter of interpretation from my previous posts. In that (or those) posts, I mentioned that not letting the product come to room temperature, and removing the liquid phase would unbalance the product. Obviously what is left behind is a more concentrated form of one of the components. I also mentioned that this was a way to remove waxes in the citrus oils, and that this might create changes in the strength of the final " rectified " (loose term here<g>) oil. Most of my comments are geared to the home user. The product used by our members is in its final stage, ready for home use, and usually in small quantities. Thus the home user should not worry too much, aside from following proper laboratory procedures. The bottom line for the home user: I think that most persons in this group can safely store most if not all oils in the refrigerator area - not the freezer - without much concern. Just let the product come to room temperature, or if the bottle is 10-30 grams, warm in the palm of your hands while gently rotating the bottle (not shaking, as that may accelerate oxidation with the air in the bottle). Tony, do we agree on the last paragraph? Remember these are not industrial quantities. -= ß =- _______________________________________________________ Quote Link to comment Share on other sites More sharing options...
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