- Atomic-layer-deposition-formed sacrificial template for the construction of an MIL-53 shell to increase selectivity of hydrogenation reactions
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We developed a method for using atomic layer deposition (ALD)-formed layers of Al2O3 as a sacrificial template to generate MIL-53(Al). The MOF shell in the CeO2/Pd@MIL-53(Al) configuration not only stabilized the Pd nanoparticles, but also regulated the selectivity of the hydrogenation of unsaturated aldehydes. This work represents the first demonstration of ALD-formed layers of metal oxides serving as sacrificial templates in the design of MOF-shell-based sandwich-type structures.
- Xu, Tiantian,Sun, Kai,Gao, Daowei,Li, Cuncheng,Hu, Xun,Chen, Guozhu
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supporting information
p. 7651 - 7654
(2019/07/04)
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- Catalyst and process for hydrogenating aromatics
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The present invention relates to an eggshell catalyst comprising an active metal selected from the group consisting of ruthenium, rhodium, palladium, platinum and mixtures thereof, applied to a support material comprising silicon dioxide, wherein the pore volume of the support material is 0.6 to 1.0 ml/g, determined by Hg porosimetry, the BET surface area is 280 to 500 m2/g, and at least 90% of the pores present have a diameter of 6 to 12 nm, to a process for preparing this eggshell catalyst, to a process for hydrogenating an organic compound which comprises at least one hydrogenatable group using the eggshell catalyst, and to the use of the eggshell catalyst for hydrogenating an organic compound.
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Page/Page column 20; 21
(2015/07/27)
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- PROCESS FOR PREPARING 4-ISOPROPYLCYCLOHEXYLMETHANOL
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The present invention relates to a process for preparing 4-isopropylcyclohexylmethanol (IPCHM) from para-cymene. The process for preparing 4-isopropylcyclohexylmethanol (IPCHM) comprises an electrochemical process for preparing a mixture of 4-isopropylbenzaldehyde dimethyl acetal and 4-(1-alkoxy-1-methylethyl)benzaldehyde dimethyl acetal, and intermediates passed through in the process, a hydrolysis step to form the corresponding benzaldehydes and a hydrogenation of this mixture to form 4-isopropylcyclohexylmethanol (IPCHM).
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Page/Page column 9
(2011/09/16)
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- Experimental determination of the conformational free energies (A values) of fluorinated substituents in cyclohexane by dynamic 19F NMR spectroscopy. Part 2. Extension to fluoromethyl, difluoromethyl, pentafluoroethyl, trifluoromethylthio and trifluoromethoxy groups
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The synthesis of monosubstituted and 1,4-substituted cyclohexanes bearing one of the title groups is described. The conformational analysis of these compounds was studied by 19F NMR spectroscopy at various temperatures. Chemical shifts for each conformer above the coalescence temperature were obtained by binomial regression from low temperature values, allowing the high precision determination of the equilibrium constants, and the corresponding thermodynamic parameters (ΔG°, ΔH°, ΔS°) of the fluorinated substituents. For A values (-ΔG°298K), the following averaged data were obtained: 1.59 (CFH2), 1.85 (CF2H), 2.67 (C2F5), 0.79 (OCF3) and 1.18 (SCF3) [in kcal mol-1]. the Royal Society of Chemistry and the Centre National de la Recherche Scientifique 2006.
- Carcenac, Yvan,Tordeux, Marc,Wakselman, Claude,Diter, Patrick
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p. 447 - 457
(2007/10/03)
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- Compounds having protected hydroxy groups
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The present invention relates to compounds with protected hydroxy groups of formula (I) These compounds are precursors for organoleptic agents, such as fragrances, and masking agents and for antimicrobial agents. When activated, the compounds of formula (I) are cleaved and form one or more organoleptic and/or antimicrobial compounds.
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- PERFUME COMPOSITION
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A perfume composition contains specified ketones, salicylates and alcohols/acetates/propionates. Use of such a perfume composition inhibits development of human body malodour. The combination of specified materials makes it possible to avoid inclusion of individual components with powerful, unacceptable odours. The perfume composition may be used in various products notably in a fabric conditioning product used during the rinsing or tumble drying of fabrics after washing to soften the fabrics.
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- Perfume compositions
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A perfume composition contains at least 50% by weight of materials which fall into five categories defined by structure, and molecular weight. Amounts of material within each category fall within specified ranges of percentage of the whole composition. Two categories, ethers and salicylates, must be present. At least two of the remaining three categories, which are alcohols, acetate/propionate esters and methyl aryl ketones, must also be present. The compositions enable good levels of deodorant activity to be achieved along with consumer-acceptable fragrance.
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- Deodorant compositions
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The invention provides a deodorant composition suitable for topical application to the human skin, comprising a composition of fragrance materials which have a Deodorant Value greater than 0.25, as measured by the Deodorant Value Test, and an inorganic deodorant active material, in a cosmetically suitable vehicle.
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- Alicyclic compounds, their use and process for preparing same
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Use of alicyclic compounds, some of which are new, as odor-modifying ingredients for manufacturing perfumes, perfumed products or synthetic essential oils, and as flavor-modifying ingredients for the manufacture of artificial flavors or for the aromatization of foodstuffs, animal feeds, pharmaceutical preparations or tobacco products. Process for preparing said alicyclic compounds.
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