502-73-8Relevant academic research and scientific papers
Real time imaging of supramolecular assembly formation via programmed nucleolipid recognition
Moreau, Louis,Camplo, Michel,Wathier, Michel,Taib, Nada,Laguerre, Michel,Bestel, Isabelle,Grinstaff, Mark W.,Barthelemy, Philippe
, p. 14454 - 14455 (2008)
Supramolecular assembly formation resulting from molecular recognition between complementary nucleolipids has been visualized in real time at the micrometer scale. Copyright
Physico-chemical studies on calcium soaps
Mehrotra, K. N.,Upadhyaya, S. K.
, p. 625 - 627 (1987)
Calcium soaps were prepared by the metathesis of the corresponding potassium soap with an aqueous solution of calcium acetate.The IR results showed that the fatty acids exist in a dimeric structure as a result of hydrogen bonding between the carbonyl groups of two acid molecules, whereas calcium palmitate has an ionic character.The X-ray analysis indicated that the zig-zag chains of the fatty acid radical constituent of the soap molecules extend straigthforward on both sides of each basal plane and that the molecular axes of the soaps are slightly inclined to the basal plane.The thermal decomposition of calcium palmitate was found to be kinetically of zero order and the energy of activation for the decomposition was in the region of 3 KJ/mole.
Process for the preparation of higher order alkanones, preferably 6 -undecanone and derivatives thereof
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Paragraph 0176-0181, (2021/08/05)
The present invention relates to a method of producing higher alkanones, preferably 6 undecanone., from ethanol and/or acetate, the method comprising (a) contacting the ethanol and/or acetate with at least one microorganism capable of carrying out carbon chain elongation to produce hexanoic acid and/or an ester thereof from the ethanol and/or acetate; (b) extracting the hexanoic acid and/or ester thereof from (a) using at least one extractant in an aqueous medium, wherein the extractant comprises at least one alkyl-phosphine oxide and at least one alkane comprising at least 12 carbon atoms; or at least one trialkylamine and at least one alkane comprising at least 12 carbon atoms; and (c) contacting the extracted hexanoic acid and/or ester thereof from (b) with at least one ketonization catalyst and eventually a further alkanoic acid comprising 1 to 22 carbon atoms under suitable reaction conditions for chemical ketonization of hexanoic acid and eventually the further alkanoic acid to a higher alkanone, preferably 6-undecanone.
METHOD FOR PRODUCING HIGHER LINEAR FATTY ACIDS OR ESTERS
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Page/Page column 32-33, (2021/11/26)
The present invention relates to a method of producing linear fatty acids comprising 7 to 28 carbon atoms or esters thereof using a combined biotechnological and chemical method. In particular, the present invention relates to a method of producing dodecanoic acid (i.e. lauric acid), via higher alkanones, preferably 6-undecanone.
Catalytic ketonization of palmitic acid over a series of transition metal oxides supported on zirconia oxide-based catalysts
Aleem, S. A.,Asikin-Mijan, N.,Dolfi, A.,Hussain, A. S.,Sivasangar, S.,Taufiq-Yap, Y. H.,Voon, C. H.
, p. 31972 - 31982 (2021/12/01)
Modification of a ZrO2 based catalyst with selected transition metals dopants has shown promising improvement in the catalytic activity of palmitic acid ketonization. Small amounts of metal oxide deposition on the surface of the ZrO2 catalyst enhances the yield of palmitone (16-hentriacontanone) as the major product with pentadecane as the largest side product. This investigation explores the effects of addition of carefully chosen metal oxides (Fe2O3, NiO, MnO2, CeO2, CuO, CoO, Cr2O3, La2O3 and ZnO) as dopants on bulk ZrO2. The catalysts are prepared via a deposition-precipitation method followed by calcination at 550 °C and characterized by XRD, BET-surface area, TPD-CO2, TPD-NH3, FESEM, TEM and XPS. The screening of synthesized catalysts was carried out with 5% catalyst loading onto 15 g of pristine palmitic acid and the reaction carried out at 340 °C for 3 h. Preliminary studies show catalytic activity improvement with addition of dopants in the order of La2O3/ZrO2 CoO/ZrO2 MnO2/ZrO2 with the highest palmitic acid conversion of 92% and palmitone yield of 27.7% achieved using 5% MnO2/ZrO2 catalyst. Besides, NiO/ZrO2 exhibits high selectivity exclusively for pentadecane compared to other catalysts with maximum yield of 24.9% and conversion of 64.9% is observed. Therefore, the changes in physicochemical properties of the dopant added ZrO2 catalysts and their influence in palmitic acid ketonization reaction is discussed in detail. This journal is
PROCESS FOR PRODUCING RENEWABLE PRODUCTS
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Page/Page column 22-23, (2020/07/21)
The present invention relates to a method for producing renewable ketones, paraffin waxes, base oil components and alkenes from a feedstock of biological origin, wherein the method includes ketonisation of esters of fatty acids and monohydric alcohols wherein the alcohols have carbon chain length of two or more.
PROCESS FOR THE PREPARATION OF ALKOXYLATES COMPOSITIONS
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Page/Page column 21; 22, (2019/06/17)
A mixture of two alkoxylates surfactants, one being an aryl aliphatic carbinol alkoxylate, the other one being a dialiphatic carbinol alkoxylate, said mixture being useful for stabilizing emulsions and dispersions used in agricultural or pharmaceutical formulations. The alkoxylates surfactants may serve as substitutes for nonylphenol ethoxylates (NPE) and tristyrylphenol ethoxylates (TSE).
PROCESS FOR THE CATALYTIC DECARBOXYLATIVE CROSS-KETONIZATION OF ARYL AND ALIPHATIC CARBOXYLIC ACID
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Page/Page column 66-69, (2019/01/08)
The present invention pertains to a process for the cross-ketonization (Piria reaction) between an aryl carboxylic acid and an aliphatic carboxylic acid using a metal-based compound and a slight or a moderate excess of aryl carboxylic acid. A good selectivity, up to 99 mol %, can be achieved. The aryl aliphatic ketone can be used for the preparation of surfactants and other downstream products.
Hydrodeoxygenation (HDO) of methyl palmitate over bifunctional Rh/ZrO2 catalyst: Insights into reaction mechanism via kinetic modeling
Bie, Yuwei,Lehtonen, Juha,Kanervo, Jaana
, p. 183 - 190 (2016/09/13)
Hydrodeoxygenation (HDO) of triglycerides into hydrocarbons is a novel catalytic process for the production of green biofuels. In this work, the HDO reaction mechanism over Rh/ZrO2 catalyst was studied by selecting methyl palmitate as a model compound. HDO of methyl palmitate proceeded initially via the hydrogenolysis into palmitic acid intermediate, followed by sequential hydrogenation-decarbonylation reaction into pentadecane via aldehyde intermediate. Bifunctional mechanism of the Rh/ZrO2 catalyst is advocated for the HDO process, in which both Rh sites and oxygen vacancy sites on ZrO2 synergistically contribute to the catalysis. The interface between Rh nanoparticle and support was proposed to host the most active sites. Based on our earlier work, a surface reaction mechanism was proposed and slightly modified to develop a set of mechanistic kinetic models. The mechanistic model consisting of two distinct types of adsorption sites for oxygenated components and H2, gave a good fitting to the kinetic data over a broad range of reaction conditions and conversion levels.
Surface and interlayer base-characters in lepidocrocite titanate: The adsorption and intercalation of fatty acid
Maluangnont, Tosapol,Arsa, Pornanan,Limsakul, Kanokporn,Juntarachairot, Songsit,Sangsan, Saithong,Gotoh, Kazuma,Sooknoi, Tawan
, p. 175 - 181 (2016/03/30)
While layered double hydroxides (LDHs) with positively-charged sheets are well known as basic materials, layered metal oxides having negatively-charged sheets are not generally recognized so. In this article, the surface and interlayer base-characters of O2- sites in layered metal oxides have been demonstrated, taking lepidocrocite titanate K0.8Zn0.4Ti1.6O4 as an example. The low basicity (0.04 mmol CO2/g) and low desorption temperature (50-300 °C) shown by CO2- TPD suggests that O2- sites at the external surfaces is weakly basic, while those at the interlayer space are mostly inaccessible to CO2. The liquid-phase adsorption study, however, revealed the uptake as much as 37% by mass of the bulky palmitic acid (C16 acid). The accompanying expansion of the interlayer space by ~0.1 nm was detected by PXRD and TEM. In an opposite manner to the external surfaces, the interlayer O2- sites can deprotonate palmitic acid, forming the salt (i.e., potassium palmitate) occluded between the sheets. Two types of basic sites are proposed based on ultrafast 1H MAS NMR and FTIR results. The interlayer basic sites in lepidocrocite titanate leads to an application of this material as a selective and stable two-dimensional (2D) basic catalyst, as demonstrated by the ketonization of palmitic acid into palmitone (C31 ketone). Tuning of the catalytic activity by varying the type of metal (Zn, Mg, and Li) substituting at TiIV sites was also illustrated.
