in Essential Oils
is “a chemical reaction in which water reacts with another substance
to form two or more
substances. This involves ionization of
the water molecules as well as splitting of the compound
hydrolyzed; example is the conversion of natural fats into fatty acids
and glycerin by reaction with water, as
occurs in one stage
of soap manufacture.” ——Van Nostrand’s Scientific Encyclopedia, 7th edition.
“or Esters may be hydrolysed
to the alcohols and carboxylic acids from which they are
derived. Any significant degree of hydrolysis occurring in an
essential oil will inevitably lead to spoilage from
the unpleasant odors of the
carboxylic acids formed.” ——The
Chemistry of Essential Oils by
David G. Williams.
“Using copper somewhere in the distillation process will retard
the growth of bacteria and retard the formation of sulphur compounds that
result from hydrolysis which will improve odor.” ——The
Aromatic News, Winter 03/04 issue, Copper in
History and Distillation.
In soap making, essential oils need to be added when the mixture
has gone from the fat and lye stage to the soap and glycerin stage and
when the mixture
is cool enough but not cool enough to accept the essential oils.
This will eliminate negative hydrolysis and the changing of the essential
oils in soap-making.
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