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Response to NNadir (Original post)

Sun Sep 11, 2016, 06:52 PM

1. Now you made me look up vanillin ...

I knew for a long time that vanillin was made from lignin-derived byproducts of the pulp and paper industry, but had never looked up the actual reaction (although I assumed some form of oxidation was required, based on the structure of lignin). So I was a little nonplussed to come across this:

... Vanillin production from the lignin-containing waste liquor obtained from acid sulfite pulping of wood began in North America in the mid 1930's. By 1981 one plant at Thorold, Ontario produced 60% of the contemporary world supply of vanillin. The process also simultaneously decreased the organic loading of the aqueous waste streams of the pulping process. Today, however, whilst vanillin production from lignin is still practiced in Norway and a few other areas, all North American facilities using this process have closed, primarily for environmental reasons. New North American vanillin plants use petrochemical raw materials. An innovation is needed to help overcome the environmental problems of this process before vanillin production from lignin is likely to resume here. Current interest in the promotion of chemicals production from renewable raw materials reinforces the incentive to do this.

J. Chem. Educ., 1997, 74 (9), p 1055

BUT ... that was as of 1997. And simply by scrolling down to the "citing articles" (The first cited article is the one in the OP) -- ain't The Web just wunnerful? -- we can see that further research, by a surprising number of different groups, into lignin-derived vanillin has been aiming to change that. I once taught at a university very close by tree farms that were used for paper and pulp, as well as lumber, and was wondering if we could do that lignosulfate-to-vanillin conversion as a UG lab experiment. Never got further than wondering before I moved away from there.

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Arrow 3 replies Author Time Post
NNadir Sep 2016 OP
LineNew Reply Now you made me look up vanillin ...
eppur_se_muova Sep 2016 #1
NNadir Sep 2016 #2
appal_jack Sep 2016 #3
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