Butyraldehyde

(redirected from Butanal)
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butyraldehyde

[¦byüd·ər′al·də‚hīd]
(organic chemistry)
CH3(CH2)2CHO A colorless liquid boiling at 75.7°C; soluble in ether and alcohol, insoluble in water; derived from the oxo process.

Butyraldehyde

 

a saturated aliphatic aldehyde; a colorless liquid with a sharp, unpleasant odor, readily soluble in organic solvents but exhibiting only limited solubility in water.

Butyraldehyde has two known isomers: n-butyr aldehyde, or butanal, CH3CH2CH2CHO (boiling point, 74.8°C; density, 0.802 g/cm3 at 20°C), and isobutyraldehyde, or isobutanal, (CH3)2CHCHO (boiling point, 64°C; density, 0.794 g/cm3 at 20°C). The η-butyraldehyde is of practical value in the preparation of polyvinylbutyral, which is widely used in the manufacture of laminated safety glass, BF adhesives, varnishes, and enamels.

The commercial production of n-butyraldehyde usually involves the reduction of crotonaldehyde. Less often, it is produced by the dehydrogenation of n-butanol or the oxidation of n- butane.

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Seis aldehidos fueron medidos en el aire de la zona urbana y la zona boscosa rural, incluyendo el formaldehido, el acetaldehido, el propanal, el butanal, el hexanal y el heptanal.
Segun una prueba estadistica de Tuckey, para comparar si las concentraciones encontradas eran significativamente similares o distintos, se encontro que, para los aldehidos muestreados, todos los valores fueron significativamente diferentes entre las dos epocas y entre los dos lugares de muestreo, con la excepcion del butanal en la epoca de transicion, cuyos resultados en las concentraciones no resultaron significativamente diferentes.
Los tres primeros aldehidos en la zona de Heredia fueron el acetaldehido (32%), el propanal (25%) y el hexanal (21%); mientras que, en la zona de la RBM, fueron el propanal (45%), el butanal (21%) y el acetaldehido (19%).
La prueba de Tukey, entre las epocas de muestreo, arrojo que en Heredia hubo diferencias significativas entre las concentraciones del formaldehido, el propanal, el butanal, el hexanal y el heptanal.
Among them, 7 were identified as 3-methyl-1-butanol, 3-hexen-1-ol, 1-heptanal, 3-octanal, 2-undecanone, butanal and hexadecane.
Maximum concentration was recorded for trans-2-hexen-1-ol and was followed by butanal (Fig.
These were trans-2-hexen-1-ol, 1-heptanal, octanal, 3-octanol, 2-nonanone, decanal, 2-undecanone, butanal, hexadecane.
Combining the information of the IR spectrum and GC/MS results, we conclude that butanal, 2-butenal, acetic acid, butanoic acid, 1-butanol, water, and C[O.
2], butanal, butenal, acetic acid, butanoic acid, and butanol are the major products of thermal oxidative degradation of PVB.
The overall kinetic parameters were taken as the values of butanal since it is the most abundant product of degradation.
O PC I, com 48,0% da variancia explicada, discriminou as especies animais, sendo que os ovinos apresentaram, de uma forma geral, elevada quantidade de compostos, produto da oxidacao lipidica, como butanal, hexanal, heptanal, alem dos acidos butanoico, hexanoico, heptanoico e octanoico e cetonas como 2-propanona e 2-butanona.
14,15), pyrolysis of milled wood lignin at 450[degrees]C yielded benzaldehyde, and pyrolysis of spruce and pine wood at 450[degrees]C generated formaldehyde, acetaldehyde, 2-propenal, butanal, and butanone (methylethyl ketone MEK), which were attributed to the breakdown of the polysaccharide fraction of the wood.