نتایج جستجو برای: alkyl alcohols
تعداد نتایج: 25341 فیلتر نتایج به سال:
Dimethyl-carbonate (DMC) is a green carboxymethylation agent for synthesis of the versatile long-chain alkyl carbonates through base-catalyzed transesterification with aliphatic alcohols. Herein, we demonstrated facile preparation novel heterogeneous base catalyst α-KMgPO4 using commercially cheap metal salts via hydrothermal-calcination procedure. The combination temperature programmed desorpt...
The aim of this study was to assess how different conditions used on the centrifugation step during olive oil extraction affect its quality by considering balance fatty acid alkyl esters (FAAEs) and their precursor alcohols. All experiments were carried out under real working in a two-phase decanter followed vertical centrifuge (VC) water injection doses paste rates tested. fruits from ‘Arbequi...
in this thesis protic and aprotic ammonium-based ionic liquids were synthesized and their surface tensions were measured in the range of 298-373k. the protics are alkyl ammonium-based ils with the carboxylate (formate, acetate, propionate) anion and aprotics are quaternary ammonium-based ils with bis(trifluoromethylsulfonyl)imide anion. capillary rise method was used for surface tension measure...
Alkyl glycosides are biodegradable surfactants with excellent physico-chemical properties. Although their wide-range application is considered ecofriendly, synthesis not due to the need for toxic organic solvents and corrosive acids as catalysts. Moreover, chemical results in complex mixtures rather than defined compounds. To overcome both disadvantages well limited solubility of sugars solvent...
In the present work, we have reported the in situ oxidation of manganese (II) acetate to MnO2 nanoparticles through the thermal plasma carbonized natural hydroxyapatite (MnO2/TP-NHAp) as a neoteric sustainable method. Interestingly, the thermal plasma-processed surface of the NHAp shows a great ability for oxidation of the manganese (II) without need of any external oxidizing agents. The cataly...
Cross-electrophile coupling, the cross-coupling of two different electrophiles, avoids the need for preformed carbon nucleophiles, but development of general methods has lagged behind cross-coupling and C-H functionalization. A central reason for this slow development is the challenge of selectively coupling two substrates that are alike in reactivity. This Account describes the discovery of ge...
The need to take into account the life cycle of ionic liquids (ILs), from sourcing raw materials involved in their synthesis disposal and degradation, has become paramount design new IL-type molecular structures. In case 1-alkyl-3-methylimidazolium salts, one prominent IL families, there is an increasing demand for synthetic methods involving (i) substitution petro-based alkyl derivatives by re...
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