Alcoholysis of lignin (in German)
Attempts were made to find uses for the lignin, which was a waste product of saccharification processes. Hydrogenation of lignin in alcohol solution to a mixture of alkyl phenols and phenol ethers of varied molecular weights is described. The process could actually be described as a process of alcoholysis catalyzed by hydrogen, since it took place to some extent even without addition of hydrogen gas. The most effective solvent and reaction medium tested was n-propanol. Other solvents tried included dioxane, cyclohexanol, ligroin, methanol, ethanol, and n-butanol. Many catalysts and reaction conditions were tried. The most successful catalyst seemed to be one designated PH86 (containing copper, barium, chromium, and zinc) used in an amount of 10% of the amount of lignin used. A pressure of 100 atm for hydrogen, a temperature of 360/sup 0/C, and a reaction time of seven hours seemed to give best results. The best proportions of input to the stirring autoclave reaction vessel seemed to be 900 g of lignin to 1500 cubic cm of n-propanol. Comparative experiments were run on wood chips or sawdust which had not been subjected to a saccharification process. Because they could be dissolved and reacted much more easily than the saccharification residue, it was concluded that lignin was considerably changed by the saccharification processes.
- Research Organization:
- I.G. Farbenindustrie, Ludwigshafen (Germany)
- OSTI ID:
- 5178455
- Report Number(s):
- TOM-300-6646-6656
- Country of Publication:
- United States
- Language:
- German
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Related Subjects
090222* -- Alcohol Fuels-- Preparation from Wastes or Biomass-- (1976-1989)
ALCOHOLS
ALKALINE EARTH METALS
AROMATICS
BARIUM
BUTANOLS
CARBOHYDRATES
CATALYTIC EFFECTS
CHEMICAL REACTIONS
CHEMICAL REACTORS
CHROMIUM
COPPER
CRYOGENIC FLUIDS
CYCLOHEXANOL
DIOXANE
ELEMENTS
ETHANOL
FLUIDS
HETEROCYCLIC COMPOUNDS
HIGH PRESSURE
HIGH TEMPERATURE
HYDROGEN
HYDROGENATION
HYDROXY COMPOUNDS
LIGNIN
LIGROIN
METALS
METHANOL
NONMETALS
ORGANIC COMPOUNDS
ORGANIC OXYGEN COMPOUNDS
PETROLEUM PRODUCTS
PHENOLS
POLYSACCHARIDES
PRODUCTION
PROPANOLS
SACCHARIDES
SOLVENT PROPERTIES
TRANSITION ELEMENTS
WOOD
ZINC