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Synthesis of Propane-2,3-diol Combinatorial Monomers

16/01/2018 · Synthesis of phenyl-2-propanone from benzyl chloride (79 mmol) ..

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Another method of producing bio-based propene is via syngas and propan-1-ol. Synthesis gas (carbon monoxide and hydrogen) is used to convert bioethanol to propan-1-ol (Figure 3, route 4):

10/10/2013 · Construct a 3 step synthesis of 1-bromopropane from propane

Any solid biomass including for example agricultural, city and industrial waste can be used to make synthesis gas using techniques similar to its production from . More recent developments includes a plant in the Netherlands, which is using liquid propane-1,2,3-triol (glycerol), a by-product from the production of , from animal fats and vegetable oils.

Synthesis of ( 14 C)propane, Journal of Labelled …

Another way to produce propene is via methanol (produced from biomass via synthesis gas), which is an example of the MTO (Methanol To Olefins) process. (Olefin is the older name for the homologous series, alkenes). Methanol can be converted into high purity ethene and propene via dimethyl ether (Figure 3, routes 10 and 9). Methanol vapour is passed over alumina at ca 600 K. An equilibrium mixture of methanol, dimethyl ether and steam is produced, containing about 25% methanol:

Atomic layer deposition (ALD) was employed to synthesize supported Pt–Pd bimetallic particles in the 1 to 2 nm range. The metal loading and composition of the supported Pt–Pd nanoparticles were controlled by varying the deposition temperature and by applying ALD metal oxide coatings to modify the support surface chemistry. High-resolution scanning transmission electron microscopy images showed monodispersed Pt–Pd nanoparticles on ALD Al2O3- and TiO2-modified SiO2 gel. X-ray absorption spectroscopy revealed that the bimetallic nanoparticles have a stable Pt-core, Pd-shell nanostructure. Density functional theory calculations revealed that the most stable surface configuration for the Pt–Pd alloys in an H2 environment has a Pt-core, Pd-shell nanostructure. In comparison to their monometallic counterparts, the small Pt–Pd bimetallic core–shell nanoparticles exhibited higher activity in propane oxidative dehydrogenation as compared to their physical mixture.

Ketone or aldehyde synthesis by acylation - Organic …

This paper describes an investigation on understanding catalytic consequences of Pt nanoparticles supported on a TiO2–Al2O3 binary oxide for propane dehydrogenation (PDH). The TiO2–Al2O3 supports were synthesized by a sol–gel method, and the Pt/TiO2–Al2O3 catalysts were prepared by an incipient wetness impregnation method. Both as-prepared and post-experiment catalysts were characterized employing N2 adsorption–desorption, X-ray diffraction, Raman spectra, H2–O2 titration, temperature-programmed desorption, thermogravimetric analysis, temperature-programmed oxidation, transmission electron microscopy, and Fourier-transform infrared spectra of chemisorbed CO. We have shown that TiO2 is highly dispersed on Al2O3, and the addition of appropriate amount of TiO2 improves propylene selectivity and catalytic stability, which is ascribed to the electron transfer from partially reduced TiO ( 2, however, also increases the amount of strong acid centers on the supports and the excessive TiO2 addition might lead to a significant amount of coke formation. The electron transfer effect and the acid sites effect of TiO2 addition exert an opposite influence on catalytic performance. The trade-off between the electron transfer effect and the acid sites effect is studied by varying the amount of TiO2 loading. An optimal loading content of TiO2 is 10 wt %, which results in a higher propylene selectivity and a better stability.

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