620-92-8Relevant articles and documents
Mesoporous Al-incorporated silica-pillared clay interlayer materials for catalytic hydroxyalkylation of phenol to bisphenol F
Wu, Xianzhang,Xia, Xinnian,Chen, You,Lu, Yanbing
, p. 74028 - 74038 (2016)
A series of mesoporous, Al-incorporated, silica-pillared clay (Al-SPCs) interlayer materials with different Al content were prepared in the presence of cationic surfactant by a structure-directing method. The catalysts' structure, texture, and acidic properties were determined using XRD, BET, SEM, TEM, FT-IR, NH3-TPD and Py-IR, respectively. Characterization results showed that these materials possess mesoporous structures with large specific surface areas. The incorporated Al leads to the increase and redistribution of Br?nsted and Lewis acid sites on SPC (silica-pillared clay). The Al-SPCs were used as catalysts for hydroxyalkylation of phenol to bisphenol F and gave a high product yield (95.4%) and selectivity (98.2%) to bisphenol F. Catalytic performance of the catalysts and characterization results proved that the catalytic activity of these catalysts depend on moderate acidity and the textural properties (specific surface areas), and the synergy of Br?nsted and Lewis acids is key for the hydroxyalkylation of phenol to bisphenol F. The reusability of the catalysts was studied, and they can be easily recovered and reused at least six times without significant loss of their catalytic activities. Finally, a plausible mechanistic pathway was proposed.
Fabrication of MIL-101(Cr/Al) with flower-like morphology and its catalytic performance
Xia, Xinnian,Xu, Yingzhuang,Chen, You,Liu, Yutang,Lu, Yanbing,Shao, Luhua
, p. 138 - 145 (2018)
The morphology and structure of metal organic frameworks (MOFs) are closely related to their properties. Herein, a flower-like morphology MOF (named as MIL-101(Cr/Al)A-f) was rationally designed in a acid-free environment and the Al3+ was transformed into the framework by the substitution process of cation exchange. During the preparation process of MIL-101(Cr/Al)A-f, we found that the acidity of the reaction mixture could regulate the morphology of MIL-101(Cr/Al)A-f by adjusting the coordination of the metal clusters and the ligand chains. The catalytic performance of MIL-101(Cr/Al)A-f was evaluated by the hydroxyalkylation of phenol with formaldehyde. Due to the larger surface area and high-density sites, MIL-101(Cr/Al)A-f showed a higher catalytic activity than the octahedron morphology MIL-101(Cr/Al)A-0.5 which was prepared with traditional method in acidic environment. In approximately equal Al3+ content, the MIL-101(Cr/Al)A-f showed a remarkably high yield (97.1%) and a excellent selectivity (98.3%) to bisphenol F at 60 °C for 30 min. Finally, a possible mechanism for the synthesis of bisphenol F was proposed and the hydroxyalkylation of phenol with formaldehyde to bisphenol F was fitted by the Langmuir-Hinshelwood kinetic model.
Iridium catalyst for catalyzing propargyl ester rearrangement to prepare substituted ketone compounds
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Paragraph 0077-0080, (2021/02/24)
The invention discloses an iridium catalyst for catalyzing propargyl ester rearrangement to prepare substituted ketone compounds, and belongs to the field of chemical materials. The iridium catalyst TriaIrX2 (wherein X is Cl, Br or I) is synthesized from (2H-1, 2, 3-triazole-1-yl) acetic acid as a ligand and iridium, and the iridium catalyst has excellent catalytic activity on a rearrangement reaction of propargyl ester compounds under mild conditions, has more efficient catalytic performance compared with a traditional catalyst, can improve the stereoselectivity of the reaction, and can improve the synthesis yield of the unsaturated substituted ketone compound. In addition, the catalyst can also be used for a reaction of preparing substituted ketone compounds from benzyl alcohol compoundsand acetophenone compounds and a synthesis reaction of bisphenol F, and the application prospect of the catalyst is wide.
Novel cyclohexylimide ionic liquid and method for catalyzing synthesis of butyl citrate and bisphenol F
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Paragraph 0010; 0013; 0021-0024, (2021/03/31)
The invention provides a novel cyclohexylimide ionic liquid and a method for catalyzing synthesis of butyl citrate and bisphenol F, and can solve the technical problem that the reaction yield needs tobe further improved when the traditional cyclohexylimide ionic liquid catalyzes synthesis of butyl citrate and bisphenol F. The novel cyclohexylimide ionic liquid is characterized by being prepared by the following method: S1, mixing and dissolving 1, 3-propane sultone and toluene, cooling the solution, adding Mn (OAc) 2 and reduced hexylimide, heating to 65 DEG C, and reacting for 12 hours; s2,filtering the reaction solution obtained in the step S1 to obtain a white precipitate, rinsing, and drying to obtain a white intermediate; s3, dissolving the intermediate in water, stirring, dropwiseadding concentrated sulfuric acid, heating to 80 DEG C, and reacting for 16 hours to obtain yellow transparent liquid, and S4, removing water from the transparent liquid by rotary evaporation, rinsing, washing and drying to obtain the novel cyclohexylimide ionic liquid.
Unusual transformation of 4-hydroxy/methoxybenzylic alcohols via C[sbnd]C ipso-substitution reaction using proton-exchanged montmorillonite as media
Chen, Dongyin,Chen, Xuan,Dong, Zezhong,Jiang, Nan,Li, Fei,Yun, Yangfang,Zhou, Yu
supporting information, (2020/11/12)
We present here proton-exchanged montmorillonite-mediated an unusual transformation of 4-hydroxy and 4-methoxybenzylic alcohols to form symmetrical benzylic ethers and diarylmethanes under mild conditions. Nuclear magnetic resonance spectroscopy and density functional theory calculations support a plausible mechanism, which includes a distinctive aromatic C[sbnd]C ipso-substitution reaction with a hydroxymethyl group as the C-based leaving group.
Nano-silica?PVC-bonded N-ethyl sulfamic acid as a recyclable solid catalyst for the hydroxyalkylation of phenol with formaldehyde to bisphenol F
Jiang, Dabo,Zhou, Shuolin,Fu, Zaihui,Xu, Qiong,Xiao, Jiafu,Zheng, Min,Zhong, Wenzhou,Liu, Xianxiang,Kirk, Steven Robert,Yin, Dulin
, p. 1394 - 1403 (2019/09/18)
Sulfamic acid functionalized PVC-coated nano-silica (NS) catalyst (NS?PVC-EDA-SO3H) was prepared via multi-step treatment processes and characterized by FT-IR, N2 adsorption-desorption, TGA/DTG, XRD, TEM, STEM-EDS, as well as acid-base back-titration. The hydroxyalkylation of phenol with formaldehyde to bisphenol F was employed to evaluate in detail its acid catalysis performances. The results indicated that the newly constructed NS?PVC-EDA-SO3H possessed richer short mesoporous to macroporous channels and highly exposed sulfamic acids and could exhibit excellent hydroxyalkylation activity and reusability owing to fast mass transfer and reaction rates for the conversion of substrates, as well as excellent structural and chemical stabilities. This new solid acid was obviously superior to the conventional homogeneous concentrated sulfuric acid and heterogeneous sulfonated resin catalysts in catalytic activity and reusability, which could achieve a remarkable formaldehyde conversion (99.9%) and selectivity of bisphenol F (94.5%) under optimal hydroxyalkylation conditions. Furthermore, it could also be recovered easily and used repeatedly at least nine times without an obvious decrease in activity.
METHOD FOR PRODUCING BISPHENOL COMPOUND
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Paragraph 0187; 0209, (2019/06/26)
PROBLEM TO BE SOLVED: To provide a method for producing an aldehyde bisphenol compound, where, a specific catalyst and a second component are combined, to efficiently and easily obtain a 4,4'-substituted body with a significantly high regioselectivity. SOLUTION: When an aldehyde bisphenol compound is produced from a phenol and an aldehyde, the production is conducted in coexistence with a heteropoly acid as an acid catalyst and a specific mercapto compound. SELECTED DRAWING: None COPYRIGHT: (C)2019,JPOandINPIT
For simultaneous preparation14 C mark F isomer of bisphenol (by machine translation)
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Paragraph 0038-0039, (2017/08/29)
The invention discloses a method for simultaneous preparation of14 C mark bisphenol F isomer, which belongs to the radioactive isotope14 C mark in the field of compound. The trace of the present invention synthetic method is by formaldehyde and14 C benzene ring mark of the phenol in phosphate under catalysis of condensation reaction, after the reaction, through separation and purification, to obtain14 C mark bisphenol F three kinds of isomers of 4, 4 '- dihydroxy diphenyl methane (4, 4' - BPF), 2, 4 '- dihydroxy diphenyl methane (2, 4' - BPF) and 2, 2 '- dihydroxy diphenyl methane (2, 2' - BPF). The invention has the following advantages: available reaction raw materials, the reaction phenolic ratio is low, the unreacted phenol get good recovery. The method for preparing bisphenol F isomer chemical purity is greater than 99%, radioactive purity are 2, 2 '- BPF 99.2%, 2, 4' - BPF 99.0%, 4, 4' - BPF 99.5%, can meet the follow-up study of the purity requirement for the material. (by machine translation)
Synthesis and self-assembly of bent core polycatenar mesogens with binding selectivity to Hg2+
Cheng, Huifang,Zhang, Ruilin,Li, Taihao,Peng, Xiongwei,Xia, Meng,Xiao, Yulong,Cheng, Xiaohong
supporting information, p. 8443 - 8450 (2017/08/14)
Bent core polycatenar mesogens, consisting of a methylene central core and two 1,2,3-triazole dendronic wings, have been synthesized via a copper-catalyzed azide-alkyne click reaction and investigated by polarizing microscopy, DSC, XRD scattering, SEM and photoluminescence measurements. All these compounds can self-assemble into thermotropic micellar liquid crystalline phases in the bulk state and form organogels in various organic solvents. They also show binding selectivity to Hg2+ among a series of cations in CH3CN-CH2Cl2 solution.
Trigonal columnar self-assembly of bent phasmid mesogens
Cheng, Huifang,Li, Ya-Xin,Zeng, Xiang-Bing,Gao, Hongfei,Cheng, Xiaohong,Ungar, Goran
supporting information, p. 156 - 159 (2018/01/02)
Three compounds with a bent rod-like aromatic core and with three alkoxy chains at each end were synthesised by click reaction. The compounds form a columnar liquid crystal phase with non-centrosymmetric trigonal p31m symmetry, the columns having a 3-arm star-like cross-section.
