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Hydrogenation crotonaldehyde

The formed 3-hydroxybutanal eliminates one mole of water in the presence of an acid producing crotonaldehyde. Hydrogenation of crotonalde-hyde produces n-hutanol ... [Pg.200]

Crotonaldehyde, hydrogenation of, 43-48 Cubane, isomerization of, 148 Cyclic dienes, metathesis of, 135 Cyclic polyenes, metathesis of, 135 Cycloalkenes, metathesis of, 134-136 kinetic model, 164 ring-opening polymerization, 143 stereoselectivity, 158-160 transalkylation, 142-144 transalkylidenation, 142-144 Cyclobutane configuration, 147 geometry of, 145, 146 Cyclobutene, metathesis of, 135 1,5,9-Cyclododecatriene, metathesis of, 135... [Pg.416]

Figure 6.13 In situ DRIFTS spectra during crotonaldehyde hydrogenation over (a) Pt/Si02 and (b) PtSn/Si02 as a function of temperature and time on stream. (Reproduced from Reference [95].)... Figure 6.13 In situ DRIFTS spectra during crotonaldehyde hydrogenation over (a) Pt/Si02 and (b) PtSn/Si02 as a function of temperature and time on stream. (Reproduced from Reference [95].)...
Preliminary results for NaY- and KY-supported Ru catalysts demonstrate significant effects of the nature of the zeolite cation for the selectivity of 3-methyl crotonaldehyde hydrogenation. It was suggested that increased basicity of the zeolite resulted in increased selectivity toward the unsaturated alcohol product. These results agree with earlier suggestions that the nature of the support can have significant influence on the product distribution in the hydrogenation of < ,/3-unsaturated aldehydes. [Pg.151]

Scheme 2.1 Reaction network for crotonaldehyde hydrogenation over Pt and Pt-Sn alloy single crystals... Scheme 2.1 Reaction network for crotonaldehyde hydrogenation over Pt and Pt-Sn alloy single crystals...
Results from these studies are important for the ongoing debates on the existence and utility of Sn/Pt alloy phases in bimetallic Pt-Sn supported catalysts. For example, our observation of dramatically decreased carbon buildup on the alloy surfaces from acetylene (a coke-precursor), and the enhanced yield of aromatics and alkenes from alkane dehydrogenation mimics important aspects of the chemistry of commercial Pt-Sn supported catalysts used for reforming. On the contrary, it seems unlikely that Sn/Pt alloy phases are solely responsible for the high selectivity observed in crotonaldehyde hydrogenation using Pt-Sn bimetallic catalysts. [Pg.48]

Figure 5. Product selectivities and conversion for crotonaldehyde hydrogenation in the gas phase over modified Ag catalysts (p = 2 MPa, H2/CA = 20 W/Fca= 19 g h mol ). Figure 5. Product selectivities and conversion for crotonaldehyde hydrogenation in the gas phase over modified Ag catalysts (p = 2 MPa, H2/CA = 20 W/Fca= 19 g h mol ).
It was checked that the support alone had no activity for crotonaldehyde hydrogenation. [Pg.580]

Here Lc and Me value are combination of constants. Adsorption constants represent adsorption of crotonaldehyde via the olefinic bond (Kab), via the carbonyl bond (Kac) and via both bonds (Kabc)> while kc, ks and kco rate constants of crotonaldehyde hydrogenation to crotyl alcohol and butanal and of cro-tyl alcohol to butanol. Analysis of the equation (3) reveals that the initial selectivity (at low conversions) depends on the Lc value. Selectivity profile as a function of conversion depends more on the Me value. For parallel-consecutive reactions the lower value of Me, the less pronounced is the crotyl alcohol selectivity dependence on the conversion. [Pg.584]

Ir/Ti02 catalyst was studied in gas-phase crotonaldehyde hydrogenation at atmospheric pressure and 353 K. Strong deactivation was observed. However up... [Pg.584]

RM Makouangou, DYu Murzin, AE Dauscher, RA Touroude. Kinetics of crotonaldehyde hydrogenation over titania supported platinum catalyst, Industrial Engineering Chemistry Research 33, 1881- 1888, 1994. [Pg.585]

P Reyes, M C Aguirre, G Pecchi, JLG Fierro, Crotonaldehyde hydrogenation on Ir supported catalysts Journal of Molecular Catalysis, 164,245- 251,2000. [Pg.585]

M Consonni, R Touroude, DYu Murzin, Deactivation and selectivity pattern in crotonaldehyde hydrogenation. Chemical Engineering Technology, 21, 605-609, 1998. [Pg.585]

Figure 8.33. Comparison between experimental and calculated activity according to eq. 8.120 (K. Liberkova, R. Touroude, D. Yu. Murzin, Analysis of deactivation and selectivity pattern in catalytic reduction of a molecule with different functional groups Crotonaldehyde hydrogenation on Pt/Sn02, Chemical Engineering Science, 57 (2002) 2519). Figure 8.33. Comparison between experimental and calculated activity according to eq. 8.120 (K. Liberkova, R. Touroude, D. Yu. Murzin, Analysis of deactivation and selectivity pattern in catalytic reduction of a molecule with different functional groups Crotonaldehyde hydrogenation on Pt/Sn02, Chemical Engineering Science, 57 (2002) 2519).
Crotonaldehyde hydrogenation over Pt/Ti02 catalysts variations of activity and selectivity with the partial pressure of crotonaldehyde. [Pg.219]

Table 1 Crotonaldehyde hydrogenation over a 4.7 % Pt/Ti02 catalyst reduced at 200°C activities and selectivities obtained after stabilization (reaction temperature = 60°C) ... Table 1 Crotonaldehyde hydrogenation over a 4.7 % Pt/Ti02 catalyst reduced at 200°C activities and selectivities obtained after stabilization (reaction temperature = 60°C) ...
Table 8 The distribution of C3-C4 hydrocarbons formed during the pretreatment of Pt/Si02 and Sn-Pt/Si02 catalysts with crotonaldehyde-hydrogen mixture (Reproduced from ref. 109 with permission)... Table 8 The distribution of C3-C4 hydrocarbons formed during the pretreatment of Pt/Si02 and Sn-Pt/Si02 catalysts with crotonaldehyde-hydrogen mixture (Reproduced from ref. 109 with permission)...
In samples treated with crotonaldehyde/hydrogen mixture (samples 1-cr, 2-cr,... [Pg.26]

Comparison of catalyst freshly reduced and used in crotonaldehyde hydrogenation... [Pg.26]

See other pages where Hydrogenation crotonaldehyde is mentioned: [Pg.12]    [Pg.1487]    [Pg.172]    [Pg.172]    [Pg.172]    [Pg.291]    [Pg.82]    [Pg.260]    [Pg.263]    [Pg.148]    [Pg.3233]    [Pg.47]    [Pg.434]    [Pg.279]    [Pg.427]    [Pg.281]    [Pg.334]    [Pg.799]    [Pg.16]    [Pg.577]    [Pg.581]    [Pg.24]    [Pg.28]    [Pg.93]    [Pg.277]   
See also in sourсe #XX -- [ Pg.169 ]



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Crotonaldehydes

Dispersion crotonaldehyde hydrogenation

Hydrogenation of crotonaldehyde

Selective Hydrogenation of Crotonaldehyde

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