1076-97-7Relevant articles and documents
Synthesis of phthalate-free plasticizers by hydrogenation in water using RhNi bimetallic catalyst on aluminated SBA-15
Phan-Vu, Duc-Ha,Tan, Chung-Sung
, p. 18178 - 18188 (2017)
In this study, rhodium-nickel bimetallic nanoparticles loaded on aluminated silica (RhNi/Al-SBA-15) were used as catalysts for the hydrogenation of phthalate in water to produce environmentally acceptable non-phthalate plasticizers. Chemical fluid deposition (CFD) was used to dope metals onto the aluminated silica support, which helped to create a uniform structure of RhNi on Al-SBA-15. The introduction of Ni helped to reduce the use of expensive Rh and increase the number of metal active sites by reducing the bimetallic nanoparticle size. Aluminated SBA-15 not only acted as the support for the RhNi bimetallic catalyst but also enhanced the reaction efficiency by introducing Br?nsted and Lewis acid sites and the absorption of phthalates on the catalyst in water. The physicochemical properties of prepared catalysts were characterized by N2 adsorption-desorption isotherm, X-ray diffraction (XRD), in situ diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS), Scanning electron microscopy (SEM), and Transmission electron microscopy (TEM). The catalytic performance of the synthesized catalysts was evaluated with the hydrogenation of dimethyl phthalate (DMP). Despite the low solubility of DMP in water, the hydrogenation using Rh0.5Ni1.5/Al-SBA-15 was carried out with an 84.4% reaction yield (cis-?:?trans- = 97.5?:?2.5) at 80 °C using 1000 psi of H2 after 2 h.
Catalyst for aqueous phase catalytic hydrogenation of phthalic acids and ester derivatives thereof and preparation method and application thereof
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Paragraph 0046-0051; 0055-0056, (2020/07/13)
The invention discloses a catalyst for aqueous phase catalytic hydrogenation of phthalic acids and ester derivatives thereof, a preparation method and application thereof. The catalyst adopts an acidic composite carrier of aluminum-doped ordered mesoporous silica, and combines specific Si/Al, ordered mesoporous size and active component loading capacity to realize catalytic hydrogenation of phthalic acids and ester derivatives thereof in the water phase to prepare corresponding cyclohexanedicarboxylic acids and derivatives thereof. The catalyst is low in raw material cost, simple in preparation process and lower in noble metal loading capacity, wherein the catalytic reaction temperature is 40-100 DEG C, the hydrogen pressure is 3-6MPa, the reaction time is 0.2-3h, the conditions are mild,the solvent is pollution-free and the catalytic efficiency is high.
Catalytic hydrogenation products of aromatic and aliphatic dicarboxylic acids
Shinde, Sunil B.,Deshpande, Raj M.
, p. 1137 - 1142 (2019/04/05)
Hydrogenation of aromatic dicarboxylic acids gave 100 % selectivity to respective cyclohexane dicarboxylic acid with 5 % Pd/C catalyst. 5 % Ru/C catalyst was observed to give over hydrogenation products at 493 K and at lower temperature (453 K) the selectivity for cyclohexane dicarboxylic acids was increased. Hydrogenation of phthalic acid with Ru-Sn/Al2O3 catalyst was observed to give phthalide instead of 1,2-benzene dimethanol or 2-hydroxy methyl benzoic acid. Ru-Sn/Al2O3 catalyst selectively hydrogenated the carboxylic group of cyclohexane dicarboxylic acids to give cyclohexane dimethanol. Use of proper catalysts and reaction conditions resulted in desired products.
