Furfural 2-Furfuryl alcohol

Furfural Furfuryl alcohol Furan Tetrahydrofurfuryl alcohol... [Pg.75]

Other furan compounds, best derived from furfural, are of interest although commercial volumes are considerably less than those of furfural, furfuryl alcohol, furan, or tetrahydrofurfuryl alcohol. Some of these compounds are stiU in developmental stages. Apphcations include solvents, resin intermediates, synthetic mbber modifiers, therapeutic uses, as well as general chemical intermediates. [Pg.83]

In acidic solution, the degradation results in the formation of furfural, furfuryl alcohol, 2-furoic acid, 3-hydroxyfurfural, furoin, 2-methyl-3,8-dihydroxychroman, ethylglyoxal, and several condensation products (36). Many metals, especially copper, cataly2e the oxidation of L-ascorbic acid. Oxalic acid and copper form a chelate complex which prevents the ascorbic acid-copper-complex formation and therefore oxalic acid inhibits effectively the oxidation of L-ascorbic acid. L-Ascorbic acid can also be stabilized with metaphosphoric acid, amino acids, 8-hydroxyquinoline, glycols, sugars, and trichloracetic acid (38). Another catalytic reaction which accounts for loss of L-ascorbic acid occurs with enzymes, eg, L-ascorbic acid oxidase, a copper protein-containing enzyme. [Pg.13]

Furanic black resins arising from furfural, furfuryl alcohol and furfurylidene acetone 3a are characterized by highly conjugated structures (6-8) their inhibiting power as radical scavengers was tested and turned out to be extremely nigh even in heterogeneous conditions, e.g. with the resin suspended in a monomer solution. [Pg.200]

Fig. 5.2(A) presents the pyrolysis mass spectrum for the soil extract. In previous work (ref. 358,359,365) it was shown that complex organic materials like polysaccharides, proteins, lignins, and soil humic fractions have characteristic peaks yielding a typical pattern, which give preliminary information about the composition of the pyrolysis fragments. Thus, characteristic peaks for polysaccharides were observed at 60, 68, 82, 84, 96, 98, 110, 112, and 126 m/z, which were also present in the soil extract. They were shown to be related to acetic acid, furan, methylfuran, hydroxyfuran, furfural, furfuryl alcohol, methylfurfural, methoxy-methylfuran, and a typical pyrolysis fragment of polysaccharides with hexose and/or deoxyhexose units, respectively.

$Fig. 5.2(A) presents the pyrolysis mass spectrum for the soil extract. In previous work (ref. 358,359,365) it was shown that complex organic materials like polysaccharides, proteins, lignins, and soil humic fractions have characteristic peaks yielding a typical pattern, which give preliminary information about the composition of the pyrolysis fragments. Thus, characteristic peaks for polysaccharides were observed at 60, 68, 82, 84, 96, 98, 110, 112, and 126 m/z, which were also present in the soil extract. They were shown to be related to acetic acid, furan, methylfuran, hydroxyfuran, furfural, furfuryl alcohol, methylfurfural, methoxy-methylfuran, and a typical pyrolysis fragment of polysaccharides with hexose and/or deoxyhexose units, respectively.$

Furfural, 5-methylfur fural, dimethyl furfural, furfuryl alcohol, 5-methylfurfuryl... [Pg.154]

Heating the wood also results in the formation of carbohydrate (cellulose and hemicellulose) breakdown products, e.g., the furanic derivatives furfural, 5-methyl-furfural, furfuryl alcohol, etc. (Chatonnet 1998). [Pg.300]

Nineteenth century research into coffee aroma ends with the laborious and somewhat doubtful identification of some ten volatile components carbonic, formic and acetic acids, methylamine. tri-methylamine, acetone, furfural, furfurylic alcohol, pyrrole and pyridine, as well as a few ill-defined phenolic components. [Pg.60]

Furcarb. [QO Chem.] Furfural/furfuryl alcohol phenolic mo Hed carbon binders. [Pg.153]

Formaldehyde/toluenesulfonamide polymer Formamide Fumaric acid Furfural Furfuryl alcohol... [Pg.4797]

Furan resins. Thermosets manufactured from furan derivatives such as furfural, furfuryl alcohol, tetrahydrofurfuryl alcohol. Applications foundry resins and core binders, acid-proof coatings, putties. [Pg.16]

Furan resins are also a low-volume consumption resin like amino resins, and are used as supplements to phenolic resins [33,34]. They are prepared by the reaction between a phenol and furan compounds such as furfural, furfuryl alcohol, and furan. Furan compounds can be used in place of formaldehyde in the conventional production of phenolic resins. The most popular and viable furan resins are prepared from furfuryl... [Pg.80]

Reaction scheme for converting xylan into furfural, furfuryl alcohol, levulinic acid, and... [Pg.387]

Furfural alcohol Furfuralcohol. See Furfuryl alcohol Furfuraldehyde. See Furfural Furfurol Furfurole. See Furfural Furfuryl alcohol... [Pg.2129]

H2, CO, CO2, H2O, furan, fiirancarboxyaldehyde, methyUurans, acetone, hydroxypropanone, butenal, butanone, butanedione, levoglucosan Fixed gases (not identified), pentene, acetaldehyde, furan, propionaldehyde, acetone, acrolein, 2-methyUuran, butyraldehyde, methyl ethyl ketone, benzene, 2,5-dimethylfiiran, methyl vinyl ketone, 2,3-butanedione, toluene, crotonaldehyde, H2O, cyclopentanone, cyclooctatetraene, acetol, pyruvaldehyde, acetic add, furfural, formic acid, 5-methyl-2-furfural, furfuryl alcohol, butyrolactone, 2-hydroxy-3-methyl-3-cyclopenten-2-one, phenol, o-cresol, m-cresol, p-cresol, 2,5-dimethylphenol, 3,4-diinetfaylphenol, 5-hydroxymefhylfuifural Mainly H2O and CO 2, smaller amounts of CO, formaldehyde, methanol, acetic acid, ethanol and acetaldehyde, and very htUe tar Product fraction volatile at 25°C contains acetic acid, CO2, CO, CH4,... [Pg.509]

Furan-2,5-Dicarboxylic Acid Furan-2,5-dicarbonsaure Furan Resins Furanharze Furcellaran Furcellaran Furfural Furfural Furfuryl Alcohol Furfurylalkohol... [Pg.333]

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