Tue, Dec-19-06, 15:12
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Experimenter
Posts: 25,866
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Plan: DDF
Stats: 202/185.4/179
BF:
Progress: 72%
Location: San Diego, CA
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I think Vanillin is actually derived from other sources too, including wood and petrochemicals. Yum!
Quote:
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The demand for vanilla flavoring has long exceeded the supply of vanilla beans. As of 2001, the annual demand for vanillin was 12,000 tons, but only 1800 tons of natural vanillin were produced.[21] The remainder was produced by chemical synthesis. Vanillin was first synthesized from eugenol (found in oil of clove) in 1874–75, less than 20 years after it was first identified and isolated. Vanillin was commercially produced from eugenol until the 1920s.[22] Later it was synthesized from lignin-containing sulfite liquor, a byproduct of wood pulp processing in paper manufacture.[23] Counter-intuitively, even though it uses waste materials, the lignin process is no longer popular because of environmental concerns, and today most vanillin is produced from the petrochemical raw material guaiacol.[24] Several routes exist for synthesizing vanillin from guaiacol.[25] At present, the most significant of these is the two-step process practiced by Rhodia since the 1970s, in which guaiacol reacts with glyoxylic acid by electrophilic aromatic substitution. The resulting vanilmandelic acid is then converted to vanillin by oxidative decarboxylation.[26]
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http://en.wikipedia.org/wiki/Vanillin |
Linear Mode
