The Nitration of Lignin

Brauns, Friedrich Emil; Brauns, Dorothy Alexandra

doi:10.1016/b978-1-4832-2779-5.50015-8

Cited by 7 publications

(2 citation statements)

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“…employed by Adler and Gierer (29). Brauns et al (14,15) treated lignin in acidified methanal, and noted that alcohol was incorporated into the depalymerized lignin product.…”

Section: Acid-alcohol Woodmentioning

confidence: 99%

“…It involves solubilizing lignin in a solvent or mixture of solvents. This concept of solubilizing lignin was utilized quite extensively in the early 1900's by wood chemists such as Brauns(14,15), Hibbert(26,27), and Freudenberg(17) in their isolation of lignin from plant materials.Their reaction conditions were rather mild: 40° to 120°C, at from 5 to 48 hours, with very low yields ( 5%). Nevertheless, the method ofdissolving lignin into solvents was firmly established.…”

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confidence: 99%

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Solvolytic liquefaction of wood under mild conditions

Yu¹

1982

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Conversion of wood to liquid products requires cleavage of bonds which crosslink the wood structure. The current technology (PERC process) uses high temperature (360°C) to initiate thermolytic bond cleavage and several thousand psig of carbon monoxide in the presence of sodium carbonate to remove wood oxygen. At such high severity, energy and capital expenditure are understandably extensive. This study examines a low-severity wood solubilization process utilizing a solvent medium consisting of a small amount of sulfuric acid and a potentially wood-derivable alcohol. In one half hour of reaction time at 250°C under 15 psia starting nitrogen pressure, over

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“…employed by Adler and Gierer (29). Brauns et al (14,15) treated lignin in acidified methanal, and noted that alcohol was incorporated into the depalymerized lignin product.…”

Section: Acid-alcohol Woodmentioning

confidence: 99%

mentioning

confidence: 99%