Furfuryl alcohol

From Wikipedia, the free encyclopedia
Furfuryl alcohol[1]
Structural formula of furfuryl alcohol
Ball-and-stick model of the furfuryl alcohol molecule
Names
Preferred IUPAC name
(Furan-2-yl)methanol
Other names
Furan-2-ylmethanol
Furfuryl alcohol
2-Furanmethanol
2-Furancarbinol
2-(Hydroxymethyl)furan
Identifiers
  • 98-00-0 checkY
3D model (JSmol)
ChEBI
ChEMBL
ChemSpider
ECHA InfoCard 100.002.388 Edit this at Wikidata
UNII
Properties
C5H6O2
Molar mass 98.10 g/mol
Appearance colorless liquid
Odor burning odor[2]
Density 1.128 g/cm3
Melting point −29 °C (−20 °F; 244 K)
Boiling point 170 °C (338 °F; 443 K)
miscible
Hazards
Safety data sheet External MSDS
NFPA 704 (fire diamond)
3
2
1
Flash point 65 °C; 149 °F; 338 K [2]
Explosive limits 1.8% - 16.3%[2]
Lethal dose or concentration (LD, LC):
LC50 (median concentration)
 397 ppm (mouse, 6 hr)
85 ppm (rat, 6 hr)
592 ppm (rat, 1 hr)[3]
LCLo (lowest published)
 597 ppm (mouse, 6 hr)[3]
NIOSH (US health exposure limits):
PEL (Permissible)
 TWA 50 ppm (200 mg/m3)[2]
REL (Recommended)
 TWA 10 ppm (40 mg/m3) ST 15 ppm (60 mg/m3) [skin][2]
IDLH (Immediate danger)
 75 ppm[2]
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
checkY  (what is checkY☒N ?)
Infobox references

Furfuryl alcohol is an organic compound containing a furan substituted with a hydroxymethyl group. It is a colorless liquid, but aged samples appear amber. It possesses a faint odor of burning and a bitter taste. It is miscible with but unstable in water. It is soluble in common organic solvents.[4]

Synthesis[]

Furfuryl alcohol is manufactured industrially by hydrogenation of furfural, which is itself typically produced from waste bio-mass such as corncobs or sugar cane bagasse. As such furfuryl alcohol may be considered a green chemical.[5] One-pot systems have been investigated to produce furfuryl alcohol directly from xylose using solid acid catalysts.[6]

Reactions[]

It undergoes many reactions including Diels-Alder additions to electrophilic alkenes and alkynes. Hydroxymethylation gives 1,5-bis(hydroxymethyl)furan. Hydrolysis gives levulinic acid. Upon treatment with acids, heat and/or catalysts, furfuryl alcohol can be made to polymerize into a resin, poly(furfuryl alcohol). Hydrogenation of furfuryl alcohol can proceed to give hydroxymethyl derivative of tetrahydrofuran and 1,5-pentanediol. The etherification reaction of furfuryl alcohol with alkyl or aryl halide (e.g. benzyl chloride) in the liquid-liquid-liquid triphase system with the help of a phase transfer catalyst also reported.[7] In the Achmatowicz reaction, also known as the Achmatowicz rearrangement, furfuryl alcohol is converted to a dihydropyran.

Applications[]

The primary use of furfuryl alcohol is as a monomer for the synthesis of furan resins.[4][8] These polymers are used in thermoset polymer matrix composites, cements, adhesives, coatings and casting/foundry resins. Polymerization involves an acid-catalyzed polycondensation, usually giving a black cross-linked product.[9] A highly simplified representation is shown below.

Furan resin.svg

Use As Rocket Propellant (Fuel Component)[]

Furfuryl alcohol has been used in rocketry as a fuel which ignites hypergolically (immediately and energetically in contact) with white fuming nitric acid or red fuming nitric acid oxidizer.[10] The use of hypergolics avoids the need for an igniter. In late 2012, Spectra, a concept liquid rocket engine using white fuming nitric acid as the oxidizer to furfuryl alcohol fuel was static tested by Copenhagen Suborbitals.[11][12]

Because of its low molecular weight, furfuryl alcohol can impregnate the cells of wood, where it can be polymerized and bonded with the wood by heat, radiation, and/or catalysts or additional reactants. The treated wood has improved moisture-dimensional stability, hardness, and decay and insect resistance; catalysts can include zinc chloride, citric, and formic acid, as well as borates.[13][14]

Safety[]

The median lethal dose for furfuryl alcohol ranges from 160 to 400 mg/kg (mouse or rabbit, oral).[citation needed]

See also[]

References[]

  1. ^ Merck Index, 11th Edition, 4215.
  2. ^ Jump up to: a b c d e f NIOSH Pocket Guide to Chemical Hazards. "#0298". National Institute for Occupational Safety and Health (NIOSH).
  3. ^ Jump up to: a b "Furfuryl alcohol". Immediately Dangerous to Life or Health Concentrations (IDLH). National Institute for Occupational Safety and Health (NIOSH).
  4. ^ Jump up to: a b Hoydonckx, H. E.; Van Rhijn, W. M.; Van Rhijn, W.; De Vos, D. E.; Jacobs, P. A. "Furfural and Derivatives". Ullmann's Encyclopedia of Industrial Chemistry. Weinheim: Wiley-VCH. doi:10.1002/14356007.a12_119.pub2.
  5. ^ Mariscal, R.; Maireles-Torres, P.; Ojeda, M.; Sádaba, I.; López Granados, M. (2016). "Furfural: a Renewable and Versatile Platform Molecule for the Synthesis of Chemicals and Fuels" (PDF). Energy Environ. Sci. 9 (4): 1144–1189. doi:10.1039/C5EE02666K. hdl:10261/184700. ISSN 1754-5692.
  6. ^ Gómez Millán, Gerardo; Sixta, Herbert (23 September 2020). "Towards the Green Synthesis of Furfuryl Alcohol in a One-Pot System from Xylose: a Review". Catalysts. 10 (10): 1101. doi:10.3390/catal10101101.
  7. ^ Katole DO, Yadav GD. Process intensification and waste minimization using liquid-liquid-liquid triphase transfer catalysis for the synthesis of 2-((benzyloxy)methyl)furan. Molecular Catalysis 2019;466:112–21. https://doi.org/10.1016/j.mcat.2019.01.004
  8. ^ Brydson, J. A. (1999). "Furan Resins". In J. A. Brydson (ed.). Plastics Materials (Seventh ed.). Oxford: Butterworth-Heinemann. pp. 810–813. doi:10.1016/B978-075064132-6/50069-3. ISBN 9780750641326.
  9. ^ Choura, Mekki; Belgacem, Naceur M.; Gandini, Alessandro (January 1996). "Acid-Catalyzed Polycondensation of Furfuryl Alcohol: Mechanisms of Chromophore Formation and Cross-Linking". Macromolecules. 29 (11): 3839–3850. Bibcode:1996MaMol..29.3839C. doi:10.1021/ma951522f.
  10. ^ MUNJAL, N. L. (May 1970). "Ignition catalysts for furfuryl alcohol - Red fuming nitric acid bipropellant". AIAA Journal. 8 (5): 980–981. Bibcode:1970AIAAJ...8..980M. doi:10.2514/3.5816.
  11. ^ Madsen, Peter. "Spectra-testen". Archived from the original on September 12, 2012. Retrieved September 10, 2012.
  12. ^ "Archived copy" (PDF). Archived from the original (PDF) on 2013-03-17. Retrieved 2013-05-01.CS1 maint: archived copy as title (link) The Spectra engine test report pdf
  13. ^ Alfred J., Stamm (1977). "Chapter 9". Wood Technology: Chemical Aspects. ACS Symposium Series. 43. Washington: American Chemical Society. pp. 141–149. doi:10.1021/bk-1977-0043.ch009. ISBN 9780841203730.
  14. ^ Baysal, Ergun; Ozaki, S.Kiyoka; Yalinkilic, MustafaKemal (21 August 2004). "Dimensional stabilization of wood treated with furfuryl alcohol catalysed by borates". Wood Science and Technology. doi:10.1007/s00226-004-0248-2. S2CID 33699990.

External links[]

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