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Furfural Furfuraldehyde

Furan is synthesized by decarbonylation of furfural (furfuraldehyde), which itself can be prepared by acidic dehydration of the pentose sugars found in oat hulls, corncobs and rice hulls. [Pg.149]

SYNS ARTIFICIAL ANT OIL FEM No. 2489 FUR. L 2-FURALDEHYDE FURALE 2-FURANALDEHYDE 2-FUR NCARBONAL 2-FURANCARBOXALDEHYDE 2-FURFURAL FURFURALDEHYDE FURFUR.ALE (ITALLAN) FURFUROL FURFUROLE 2-FURIL-METANALE (ITALIAN) FUROLE a-FUROLE 2-FURYL-METHANAL NCI-C56177 PYROMUCIC ALDEHYDE RCRA WASTE NUMBER U125... [Pg.684]

Furfural (furfuraldehyde) is a very inexpensive starting material obtained from the left-overs of agriculture (acidic distillation of straw and brans) [506]. It adds MeMgCl giving racemic l-(2-furyl)ethanol (( )-396) which has been resolved easily using either enzymatic methods [507,508,509] or metal-catalyzed kinetic resolution [510,511]. For instance, the reaction ( )-396 with f-butyl hydroperoxide in the presence of catalytic amounts of Ti(0-i-Pr)4 and L-(+)-di-isopropyl tartrate (l-(-i-)-DIPT) gives a mixture of optically active (+)-396 andpyranone 397. These compounds are separated readily and isolated in 32 and 53% yield, respectively (O Scheme 100) [512,513]. [Pg.936]

Furan is most readily prepared by decarbonylation (elimination of carbon monoxide) of furfural (furfuraldehyde), which in turn is made by the treatment of oat hulls, corncobs, or rice hulls with hot hydrochloric acid. In the latter reaction pentosans (polypentosides) are hydrolyzed to pentoses, which then undergo dehydration and cyclization to form furfural. [Pg.1007]

FURANCARBONAL 2-FURANCARBOXALDEHYDE 2-FURFURAL FURFURALDEHYDE FURFUROL FURFUROLE FUROLE OC-FUROLE 2-FURYL-METHANAL PYROMUCIC ALDEHYDE... [Pg.147]

CAS 98-01-1 EINECS/ELINCS 202-627-7 UN 1199 (DOT) FEMA 2489 Synonyms Artificial ant oil Artificial oil of ants Fural 2-Furaldehyde Furale 2-Furanaldehyde 2-Furancarbonal 2-Furancarboxaldehyde 2-Furfural Furfuraldehyde... [Pg.1855]

Freon-22, cl01 Freon-114, d271 2,5-Furandione, m2 2-Furanmethanol, f50 Furfural, f44 2-Furfuraldehyde, f44... [Pg.229]

FURFURAL Pyromucic Aldehyde, 2-Furaldehyde, Furfuraldehyde, Fural Combustible Liquid, III 2 2 0... [Pg.102]

FURFURALDEHYDE. [CAS 98-01-1]. 2-C4H-,0 CHO. formula weight 192.16. colorless, odorous (pungent, almond-like) liquid aldehyde, mp —38.7°C. bp I61.7CC. sp gr 1.159. Also known as 2-luraldehyde or 2-furancarboxalde hyde, this compound becomes brown in color when in contact with air. Furfural is modestly soluble in 114) (up to 8% by weight at 20cC) and is miscible in all proportions with alcohol and ether. At atmospheric pressure, a mixture of furfural and H 0 (65%) forms a minimum-boiling azeotrope when a distillation temperature of 97.9°C is reached. [Pg.694]

Furfural is obtained commercially by mealing pentosan-rich ugricullural residues (corncobs, oat hulls, cottonseed hulls, hagasse. rice hulls) with a dilute acid and removing the furfural by steam distillation. Major industrial uses of furfuraldehyde include (1) the production of t urnns and tetrahydrofurans where the compound is an intermediate (2) Ihc solvent refining of petroleum and rosin products (3) the solvent binding of bonded phenolic products and (4) the extractive distillation of butadiene from other C4 hydrocarbons. [Pg.694]

For this purpose a standard solution containing 0-005 gram of furfural per litre of pure 50% alcohol is prepared, the spint to be tested being also brought to 50% concentration. 10 c c of each of the two liquids are treated at the same time with 10 drops of aniline and 1 c c of concentrated acetic acid. If, after 20 minutes, the colorations are approximately similar, they are compared in the Duboscq colorimeter, if, however, the two colorations differ greatly, the test is repeated m the manner described for the determination of the aldehydes (tee above). The proportion of furfuraldehyde present is readily calculated from the colorimeter readmgs... [Pg.246]

The major soluble components of acid hydrolysates are sugars, such as xylose, glucose, and cellobiose furfurals, such as furfuraldehyde and hydroxymethyl furfural and organic acids, such as levulinic acid, formic acid, and acetic acid (13). When natural sources of cellulose are acid-hydrolized, numerous products can result, largely because of the hemicellulose materials. These make it difficult to produce a relatively pure sugar product and limit the utility of the acid hydrolysis process. [Pg.34]

Furfuraldehyde has been reacted with meprobamate in an acid medium to give an absorbance maximum at 370 mfj, when in 10 sulfuric acid in acetic acid, or at 330 mu when in 20 hydrochloric acid in ethanolu9. When meprobamate was heated in acetic acid and then reacted with furfural in the presence of antimony trichloride a colored product with a maximum absorbance at 391 mn was formed . [Pg.220]

The structure of furfuraldehyde (furfural) has been determined to be that represented by the formula,... [Pg.342]

Furfuraldehyde, which is also called furfural or furfuroll, is formed when pentoses are heated with dilute sulphuric acid or dilute hydrochloric acid. Since it can be readily prepared at a cheap price in this way from corn-stalks, efforts have been made... [Pg.576]

Furfuraldehyde. See Furfural Furfural mercaptan. See Furfuryi mercaptan Furfural, 5-methyl-. See Methylfurfural Furfuramide. See Hydrofuramide Furfuran. See Furan... [Pg.1855]

See other pages where Furfural Furfuraldehyde is mentioned: [Pg.184]    [Pg.90]    [Pg.624]    [Pg.24]    [Pg.300]    [Pg.644]    [Pg.184]    [Pg.90]    [Pg.624]    [Pg.24]    [Pg.300]    [Pg.644]    [Pg.184]    [Pg.171]    [Pg.270]    [Pg.249]    [Pg.28]    [Pg.162]    [Pg.162]    [Pg.1488]    [Pg.226]    [Pg.226]    [Pg.24]    [Pg.1701]    [Pg.270]    [Pg.588]    [Pg.589]    [Pg.393]    [Pg.105]    [Pg.105]    [Pg.270]    [Pg.532]    [Pg.1124]    [Pg.417]    [Pg.17]    [Pg.87]    [Pg.224]   
See also in sourсe #XX -- [ Pg.147 ]



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