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3.117 Aktuelle Fachpublikationen zum Thema temperature

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Effective synthesis of novel O-acetylated compounds over ZrO2-Al2O3 solid acid

04.01.2015 | Author(s): N. Thimmaraju , S.Z. Mohamed Shamshuddin , S.R. Pratap , K. Shyam Prasad, Arabian Journal of Chemistry, 2015

Publication date: Available online 3 January 2015 Source:Arabian Journal of Chemistry Author(s): N. Thimmaraju , S.Z. Mohamed Shamshuddin , S.R. Pratap , K. Shyam Prasad The solid acids such as Al2O3, ZrO2 and ZrO2-Al2O3 containing different ZrO2 loadings (10-100 mol%) were prepared by ...

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Separation of butyric acid in fixed bed column with solvent impregnated resin containing ammonium ionic liquid

04.01.2015 | Author(s): Marek Blahušiak , Štefan Schlosser , Július Annus, Reactive and Functional Polymers, 2015

Publication date: Available online 2 January 2015 Source:Reactive and Functional Polymers Author(s): Marek Blahušiak , Štefan Schlosser , Július Annus Batch equilibrium and fixed bed column extraction experiments for the extraction of butyric acid (BA) into solvent impregnated resin ...

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Sarcosine and betaine crystals upon cooling: structural motifs unstable at high pressure become stable at low temperatures

30.12.2014 | E. A. Kapustin; V. S. Minkov; E. V. Boldyreva, Physical Chemistry Chemical Physics, 2014

The crystal structures of N-methyl derivatives of the simplest amino acid glycine, namely sarcosine (C3H7NO2) and betaine (C5H11NO2), were studied upon cooling by single-crystal X-ray diffraction and single-crystal polarized Raman spectroscopy. The effects of decreasing temperature and increasing ...

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Insight into the Mechanism of Hydrogenation of Amino Acids to Amino Alcohols Catalyzed by a Heterogeneous MoOx‐Modified Rh Catalyst

29.12.2014 | Masazumi Tamura, Riku Tamura, Yasuyuki Takeda, Yoshinao Nakagawa, Keiichi Tomishige, Chemistry - A European Journal, 2014

Abstract Hydrogenation of amino acids to amino alcohols is a promising utilization of natural amino acids. We found that MoOx‐modified Rh/SiO2 (Rh–MoOx/SiO2) is an efficient heterogeneous catalyst for the reaction at low temperature (323 K) and the addition of a small amount of MoOx ...

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Comparison of reduced and sulfided CoMo/γ‐Al2O3 catalyst on hydroprocessing of pretreated bio‐oil in a continuous packed‐bed reactor

29.12.2014 | Divya R. Parapati, Vamshi K. Guda, Venkata K. Penmetsa, Sathish K. Tanneru, Brian Mitchell, Philip H. Steele, Environmental Progress, 2014

Pretreated bio‐oil was hydroprocessed with conventional sulfided CoMo/γ‐Al2O3 catalyst in a continuous packed‐bed reactor. Hydroprocessing experiments were performed at a temperature of 350 to 400°C, 1500 psig hydrogen pressure, using a hydrogen flow rate of 500 mL/min at a liquid hourly space ...

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Molecules, Vol. 20, Pages 366-383: New Coumarin Derivative as an Eco-Friendly Inhibitor of Corrosion of Mild Steel in Acid Medium

29.12.2014 | Al-Amiery, Ahmed A.; Al-Majedy, Yasameen K.; Kadhum, Abdul Amir H.; Mohamad, Abu Bakar, Molecules, 2014

The anticorrosion ability of a synthesized coumarin, namely 2-(coumarin-4-yloxy)acetohydrazide (EFCI), for mild steel (MS) in 1 M hydrochloric acid solution has been studied using a weight loss method. The effect of temperature on the corrosion rate was investigated, and some thermodynamic ...

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Effect of fatty acid on the formation of ITO nanocrystals via one-pot pyrolysis reaction

24.12.2014 | Shaojuan Luo; Jiyun Feng; Ka Ming Ng, CrystEngComm, 2014

Indium–tin carboxylate precursors were successfully synthesized by a direct reaction of indium and tin metals with a molten fatty acid under a nitrogen atmosphere at 260 °C. A linear relationship between the reaction initiation temperature and the number of carbon atoms of the fatty acids ranging ...

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Molecules, Vol. 20, Pages 70-87: Comparison of the Separation Performances of Cinchona Alkaloid-Based Zwitterionic Stationary Phases in the Enantioseparation of β2- and β3-Amino Acids

23.12.2014 | Ilisz, István ; Grecsó, Nóra ; Misicka, Aleksandra ; Tymecka, Dagmara ; Lázár, László ; Lindner, Wolfgang ; Péter, Antal, Molecules, 2014

The enantiomers of twelve unusual β2- and β3-homoamino acids containing the same side-chains were separated on chiral stationary phases containing a quinine- or quinidine-based zwitterionic ion-exchanger as chiral selector. The effects of the mobile phase composition, the nature and concentration ...

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Chemo‐ and Stereoselective Reduction of β‐Keto‐α‐oximino Nitriles by Using Baker's Yeast

22.12.2014 | Kilwoong Mo, Soon Bang Kang, Youseung Kim, Yong Sup Lee, Jae Wook Lee, Gyochang Keum, European Journal of Organic Chemistry, 2014

Abstract The baker's yeast mediated reduction of β‐keto‐α‐oximino nitriles 3 at 20 °C gave β‐hydroxy‐α‐oximino nitriles 4 in high yields with high enantiomeric purity [enantiomeric excess (ee) values >99 %]. At room temperature, the same reaction afforded the product in a slightly lower yield. ...

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ZnO as an Efficient Nucleating Agent for Rapid, Room Temperature Synthesis and Patterning of Zn-Based Metal–Organic Frameworks

22.12.2014 | Erika Zanchetta; Luca Malfatti; Raffaele Ricco; Mark J. Styles; Fabio Lisi; Campbell J. Coghlan; Christian J. Doonan ..., Chemistry of Materials, 2014

The use of ZnO particles as efficient agents for seeding, growing, and precisely positioning metal–organic frameworks (MOFs) is described. Ceramic seeds have been successfully used for the preparation of Zn-based MOFs with a number of different carboxylic acids: terephthalic acid, ...

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