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Butanol from butanone

Figure 13. Continuous formation of (S )-4-phenyl-2-butanol from 4-phenyl-2-butanone using the electrochemical enzyme membrane reactor under indirect electrochemical NADH regeneration with a high-molecular-weight rhodium catalyst [26,29,30,65]. Figure 13. Continuous formation of (S )-4-phenyl-2-butanol from 4-phenyl-2-butanone using the electrochemical enzyme membrane reactor under indirect electrochemical NADH regeneration with a high-molecular-weight rhodium catalyst [26,29,30,65].
Figure 3.16. Two-dimensional separation of the components of a coal derived gasoline fraction using live switching. Column A was 121 m open tubular column coated with polyfethylene glycol) and column B a 64 m poly(dimethylsiloxane) thick film column. Both columns were temperature programmed independently taking advantage of the two-oven configuration. Peak identification 1 = acetone, 2 = 2-butanone, 3 = benzene, 4 = isopropylmethyUcetone, 5 = isopropanol, 6 = ethanol, 7 = toluene, 8 = propionitrile, 9 = acetonitrile, 10 = isobutanol, 11 = 1-propanol, and 12 =l-butanol. (From ref. [195] Elsevier). Figure 3.16. Two-dimensional separation of the components of a coal derived gasoline fraction using live switching. Column A was 121 m open tubular column coated with polyfethylene glycol) and column B a 64 m poly(dimethylsiloxane) thick film column. Both columns were temperature programmed independently taking advantage of the two-oven configuration. Peak identification 1 = acetone, 2 = 2-butanone, 3 = benzene, 4 = isopropylmethyUcetone, 5 = isopropanol, 6 = ethanol, 7 = toluene, 8 = propionitrile, 9 = acetonitrile, 10 = isobutanol, 11 = 1-propanol, and 12 =l-butanol. (From ref. [195] Elsevier).
Secondary butyl alcohol, methylethyl car-binol, 2-butanol, CH3CH2CH(Me)OH. B.p. I00°C. Manufactured from the butane-butene fraction of the gas from the cracking of petroleum. Used to prepare butanone. [Pg.71]

Closely related to the concept of chirality, and particularly important in biological chemistry, is the notion of prochirality. A molecule is said to be prochiral if can be converted from achiral to chiral in a single chemical step. For instance, an unsymmetrical ketone like 2-butanone is prochiral because it can be converted to the chiral alcohol 2-butanol by addition of hydrogen, as we ll see in Section 17.4. [Pg.315]

Such a possibility has been recognized by early workers,9 but in spite of this intriguing possibility, only recently has such a metal surface been created. Chiral kink sites were created on Ag single crystal surfaces to produce the enantiomeric surfaces Ag(643)s and Ag(643)R however, no differences between (R)- and (S)-2-butanol were observed for either the temperature-programmed desorption from the clean surfaces or the dehydrogenation (to 2-butanone) from preoxidized surfaces.10 Unfortunately, Ag exhibits few catalytic properties, so only a limited array of test reactions is available to probe enantioselectivity over this metal. It would be good if this technique were applied to a more catalytically active metal such as Pt. [Pg.103]

Dining distillation of 2-propanol recovered from the reduction of crotonaldehyde with isopropanol/aluminium isopropoxide, a violent explosion occurred. This was attributed to peroxidised diisopropyl ether (a possible by-product) or to peroxidised crotonaldehyde. An alternative or additional possibility is that the isopropanol may have contained traces of a higher secondary alcohol (e.g. 2-butanol) which would be oxidised during the Meerwein-Ponndorf reduction procedure to 2-butanone. The latter would then effectively sensitise the isopropanol or other peroxidisable species to peroxidation. [Pg.454]

Because the direct electrochemical oxidation of NAD(P)H has to take place at an anode potential of + 900 mV vs NHE or more, only rather oxidation-stable substrates can be transformed without loss of selectivity—thus limiting the applicability of this method. The electron transfer between NADH and the anode may be accellerated by the use of a mediator. At the same time, electrode fouling which is often observed in the anodic oxidation of NADH can be prevented. Synthetic applications have been described for the oxidation of 2-hexene-l-ol and 2-butanol to 2-hexenal and 2-butanone catalyzed by yeast alcohol dehydrogenase (YADH) and the alcohol dehydrogenase from Thermoanaerobium brockii (TBADH) repectively with indirect electrochemical... [Pg.97]

Recently, we adopted the same system for the reduction of 4-phenyl-2-butanone to (S)-4-phenyl-2-butanol using the NADH-dependent horse liver alcohol dehydrogenase (HLADH) and S-ADH from Rhodococcus sp [68] with high enantioselectivity (Fig. 17) [69]. As mediator, we applied the low-molecular... [Pg.110]

A 125 ml flask fitted with a magnetic stirring bar, a reflux condenser, a thermometer and a separatory funnel is charged with 7.2 g (9 ml, 0.1 mol) of 2-butanone (methyl ethyl ketone). From the separatory funnel a solution of 1.5 g (0.04 mol, 60% excess) of sodium borohydride in 15 ml of water is added dropwise with stirring at such a rate as to raise the temperature of the readion mixture to 40° and maintain it at 40-50°. Cooling with a water bath may be applied if the temperature rises above 50°. After the addition has been completed (approximately 30 minutes) the mixture is stirred until the temperature drops to 30°. It is then transferred to a separatory funnel and saturated with sodium chloride. The aqueous layer is drained and the organic layer is dried with anhydrous potassium carbonate. Distillation affords 5.5-6.0g (73-81%) of 2-butanol, b.p. 90-95°. [Pg.209]

Four primary conclusions can be put forth regarding the data of Table 1. First, a small difference in selectivity is seen for the non-cavitating ultrasound compared to the control experiment (obtained from the inverse of the ratio of lifetimes). For example, the ratio of 2-butanone to 2-butanol products for the stirred without 1-pentanol is 0.74 (equal to 60.7/82.0). Second, comparing these values to the... [Pg.216]

Under the same reaction conditions, acetaldehyde and butyraldehyde displayed near-complete conversion (greater than 95%). The photocatalytic oxidation of the alcohol 1-butanol displayed similarly high conversion levels, although conversion of methanol was somewhat lower. The oxygenated compounds methyl-t-butyl ether (MTBE), methyl acrylate, 1,4 dioxane, and vinyl acetate displayed conversion levels ranging from 92% to 100%. The lowest conversion levels of the oxygenated compounds studied were seen with the ketones used [acetone and 2-butanone (methylethylketone)], which displayed conversions of approximately 80%. The initial conversion levels seen with -hexane were similar... [Pg.261]

The McReynolds constants listed are differences in retention index units between die reference compound run on squalane and on die other phases listed. The last entry in the table shows die absolute retention indices for the reference compounds on squalane. Reference compounds are (1) benzene, (2) 1-butanol, (3) 2-pentanone, (4) 1 nitropropane, and (5) pyridine. (Note that Rohrschneider s constants are based on these reference compounds and may differ slightly from the McReynolds constants. The reference compounds for Rohrschneider s constants are (1) benzene, (2) ethanol, (3) 2-butanone, (4) nitromethane, and (5) pyridine.) The minimum temperature is that at which normal gas-liquid chromatography (GLC) behavior is expected. Below that temperature, die phase will be a solid or an extremely viscous gum. The maximum temperature is that above which die bleed rate will be excessive. [Pg.888]

Figure 5.16 Enantioselectivity of the redox reaction of ADH from T. ethanolicus with different alcohols (Pham, 1990). Temperature dependence of free energy of activation differences for 2-butanol and 2-pentanol open squares 2-butanol open circles 2-pentanol filled square reduction of 2-butanone filled circle reduction of 2-pentanone. Figure 5.16 Enantioselectivity of the redox reaction of ADH from T. ethanolicus with different alcohols (Pham, 1990). Temperature dependence of free energy of activation differences for 2-butanol and 2-pentanol open squares 2-butanol open circles 2-pentanol filled square reduction of 2-butanone filled circle reduction of 2-pentanone.
Fig. 15 Electrochemically driven oxidation of 2-hexen-l-ol and 2-butanol to 2-hexenal and 2-butanone, respectively, catalyzed by ADH from Thermoanaerobacter brockii. tmphen 3,4,7,8-tetramethy 1-1,10-phenanthroline... Fig. 15 Electrochemically driven oxidation of 2-hexen-l-ol and 2-butanol to 2-hexenal and 2-butanone, respectively, catalyzed by ADH from Thermoanaerobacter brockii. tmphen 3,4,7,8-tetramethy 1-1,10-phenanthroline...
N 12.61% (theory) (12.4% found in oily product of Warren) OB to CO2 minus 72.0%. The oily product puffed off at 187° after heating for 5 secs it. did not explode by impact of 2kg wt at lOOcm hygroscopicity at 30° 90% RH 0.40% volatility at 27° in 48 hts 0.34% thermal stability at 82.2° KI test 1 min. Warren prepd it. at PicAtsn Lab by adding in small portions and with agitation, pulverized di-methylolbutanone to cooled to ca 5° mixed acid consisting of nitric acid 25.3, sulfuric acid 59.6 water 15.1% in the ratio of 1.5 parts nitric acid per 1 part of butanone time of nitration 1 hour. Separation of crude product from acid and further purification was the same as described under 3,3 Dimethylol-2-butanol Trinitrate... [Pg.263]


See other pages where Butanol from butanone is mentioned: [Pg.194]    [Pg.194]    [Pg.43]    [Pg.277]    [Pg.434]    [Pg.53]    [Pg.303]    [Pg.178]    [Pg.109]    [Pg.1150]    [Pg.241]    [Pg.284]    [Pg.220]    [Pg.9]    [Pg.187]    [Pg.480]    [Pg.174]    [Pg.147]    [Pg.583]    [Pg.303]    [Pg.85]    [Pg.1116]    [Pg.19]    [Pg.633]    [Pg.58]   
See also in sourсe #XX -- [ Pg.108 , Pg.209 ]




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