- Environment-friendly metal carboxylate and preparation method thereof
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The invention discloses an environment-friendly metal carboxylate and a preparation method thereof. The metal carboxylate has the following structure: CH3(CH2)nCOO-M-OOC(CH2)nCH3, wherein M is Zn and Mg, and n is equal to 10 to 16. Straight-chain saturated monocarboxylic acid and oxide powder or hydroxide powder of zinc and magnesium are subjected to salt-forming reaction under the action of catalyst, the metal carboxylate is a meltable solid, and after grinding, a powdery environment-friendly metal carboxylate product can be prepared. The preparation process is simple, operability is high, energy is saved, the product purity is high, and the environment-friendly metal carboxylate is environment-friendly, and meets the requirement of ROHS directive, EU (European Union) REACH regulation and EN71-3 standard.
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Paragraph 0047-0048
(2017/01/23)
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- Zinc carboxylic salts used as catalyst in the biodiesel synthesis by esterification and transesterification: Study of the stability in the reaction medium
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Biodiesel is produced by the catalytic transesterification of renewable sources such as vegetable oils and animal fats. It is an attractive alternative to diesel fuel because of its environmental benefits. In this work, the transesterification of soybean
- Reinoso, Deborath M.,Damiani, Daniel E.,Tonetto, Gabriela M.
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- Compact metal-organic frameworks for anti-corrosion applications: New binary linear saturated carboxylates of zinc
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Zinc-based metal-organic frameworks (MOFs), binary zinc carboxylates ZnCnCn′ with Cn and Cn′ = CH3(CH2)n - 2COO-, have been synthesised and characterised for anti-corrosion applications. The crystallographic structures of ZnC10C14 and ZnC 10C16 were determied from synchrotron powder diffraction data and refined by the Rietveld method. Protective coatings on electrogalvanised steel composed of ZnC12C16 have been developed by formulating a particular "carboxylating" bath. The ZnC12C16 coating exhibits better anti-corrosion behaviour than the pure Zn(C16)2 and Zn(C12)2 coatings, according to electrochemical and non-electrochemical measurements. The crystallographic results and corrosion measurements demonstrate the great flexibility of the zinc carboxylate lamellar structures in modifying the insolubility and hydrophobicity of the protective coatings. In addition, the conditions for the ZnC12C16 coating process fulfil the specifications for the surface treatment of zinc. Finally, these new compounds, which can be easily synthesised in water, provide a new and environmentally friendly anti-corrosion treatment for metals. New zinc-based metal-organic frameworks (MOFs), binary zinc carboxylates ZnCnCn′ with Cn and Cn′ = CH3(CH2)n - 2COO-, have been synthesised and characterised for anti-corrosion applications on zinc. The crystallographic structures demonstrate the great flexibility of these MOFs in modifying the insolubility and hydrophobicity of the protective coatings on metals in an aqueous solvent process. Copyright
- Mesbah, Adel,Jacques, Sophie,Rocca, Emmanuel,Francois, Michel,Steinmetz, Jean
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p. 1315 - 1321
(2011/06/10)
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- Room temperature molecular and lattice structures of a homologous series of anhydrous zinc(II) n-alkanoate
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The room temperature structures and lattice arrangements of a homologous series of zinc(II) n-alkanoates from chain length, nC = 4-20, inclusive, have been studied using infrared spectroscopy, X-ray diffraction and polarizing light microscopy. Lattice parameters from single crystal and powder diffraction data, for zinc(II) hexanoate, are compared to validate the use of the powder method. Since they are in excellent agreement, the powder data are analyzed by a software programme to determine lattice parameters for all the homologues. These are used, in conjunction with infrared, X-ray, density and molecular model calculations to determine molecular and lattice structures. The compounds are isostructural, in that, each zinc atom is tetrahedrally coordinated to oxygen atoms from four different carboxylate groups and each ligand forms a Z,E-type bidentate bridge with two tetrahedral zinc atoms resulting in a syn-anti arrangement. The hydrocarbon chains are in the fully extended all-trans configuration and are tilted at an average angle of 60° to the zinc basal plane. For the short chain length compounds with nC ≤ 8, a double bilayer in-plane-perpendicular-perpendicular-in-plane arrangement of hydrocarbon chains, with two molecules per unit cell, is indicated. For the others, an interdigitating in-plane-in-plane bilayer with head-to-tail interactions, with one molecule per unit cell, is proposed. A geometric model is presented to account for odd-even chain effects and to explain the differences in melting points and densities between these adducts. All the compounds crystallize in the monoclinic space group with P symmetry and are arranged in a two-dimensional network along the ac plane within the unit cell.
- Taylor, Richard A.,Ellis, Henry A.
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- Melting of saturated fatty acid zinc soaps
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The melting of alkyl chains in the saturated fatty acid zinc soaps of different chain lengths, Zn(CnH2n-1COO)2; n = 11, 13, 15, and 17, have been investigated by powder X-ray diffraction, differential scanning calorimetry, and vibrational spectroscopy. These compounds have a layer structure with the alkyl chains arranged as tilted bilayers and with all methylene chains adopting a planar, all-trans conformation at room temperature. The saturated fatty acid zinc soaps exhibit a single reversible melting transition with the associated enthalpy change varying linearly with alkyl chain length, but surprisingly, the melting temperature remaining constant. Melting is associated with changes in the conformation of the alkyl chains and in the nature of coordination of the fatty acid to zinc. By monitoring features in the infrared spectra that are characteristic of the global conformation of the alkyl chains, a quantitative relation between conformational disorder and melting is established. It is found that, irrespective of the alkyl chain length, melting occurs when 30% of the chains in the soap are disordered. These results highlight the universal nature of the melting of saturated fatty acid zinc soaps and provide a simple explanation for the observed phenomena.
- Barman,Vasudevan
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p. 22407 - 22414
(2008/10/09)
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- Phase diagrams of liquid-crystal binary systems of lanthanum(III) laurate with some divalent metal laurates
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Phase equilibria in binary systems of lanthanum(III) laurate with laurates of divalent metals (lead, cadmium, zinc, and cobalt) are studied at temperatures from 0 to 350°C using differential thermal analysis (DTA) and polythermal polarized-light microscopy. Continuous or terminal smectic A liquid-crystal (LC) solutions are found to form in all systems. The temperature-concentration fields of formation of ionic LCs and glasses are determined. Pleiades Publishing, Inc., 2006.
- Bylina,Mirnaya,Volkov
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p. 639 - 641
(2008/10/09)
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- Composition for treating inflammation which contains zinc pyrrolidonecarboxylate
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The present invention provides a composition which suppresses inflammation of the skin. The composition of the present invention contains zinc pyrrolidonecarboxylate. The composition of the present invention may be formulated as a cosmetic or any externally applied agent.
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Page/Page column 2-3
(2008/06/13)
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- Phenylalkanoic acid esters and their use as antioxidants
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Compounds of formula (I): STR1 wherein: R1 represents an alkyl group having from 1 to 6 carbon atoms; R2 represents an alkyl group having from 8 to 24 carbon atoms; EO represents an ethyleneoxy group; PO represents a propyleneoxy group; k is 0 or an integer from 1 to 10; and m is an integer from 1 to 4; provided that the total of (k+m) is greater than 1 and not greater than 10; are useful as antioxidant stabilizers for polymeric materials.
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