titanium oxalate | 14194-07-1

• 分子结构分类: 有机化合物 - 有机酸及其衍生物 - 羧酸及其衍生物
• 英文名称: titanium oxalate
• 英文别名: Oxalsaeure-titansaeure-anyhdrid；oxalate;titanium(4+)
• CAS: 14194-07-1；14677-00-0；26075-24-1；51011-09-7；92474-35-6；92820-27-4
• 化学式: 2C₂O₄*Ti
• 分子量: 223.919
• InChiKey: IAZPERAADPMWOP-UHFFFAOYSA-L

计算性质

• 辛醇/水分配系数(LogP)：
  -3.52
• 重原子数：
  7.0
• 可旋转键数：
  0.0
• 环数：
  0.0
• sp3杂化的碳原子比例：
  0.0
• 拓扑面积：
  80.26
• 氢给体数：
  0.0
• 氢受体数：
  4.0

反应信息

• 作为反应物：
  描述：

  phosphomolybdic acid 、 titanium oxalate 以 水 为溶剂， 生成
  参考文献：
  名称：

  A substrate-versatile catalyst for the selective oxidation of light alkanes I. Reactivity

  摘要：

  The reactivity of niobium and pyridine-exchanged molybdophosphoric (NbPMo(12)pyr) and molybdovanadophosphoric (NbPMol(11)Vpyr) acid catalysts are investigated for the selective oxidation of light alkanes. Productivities and selectivities are presented for the reactions of propane to acrylic acid and n-butane to maleic acid. Pretreatment of the material to 420 degreesC in an inert atmosphere is required to form an active catalyst, and the combination of both niobium and pyridine is necessary for obtaining maximum activity. Vanadium is not essential for the selective formation of maleic acid from butane, but does appear to affect the selective formation of acrylic acid from propane. Other metal cations can be used instead of niobium; however, none are as effective as niobium. Comparison of activity results to those from other molybdate-based structures indicates that high activity requires the use of a reducible molybdenum species. In addition, the central phosphorus heteroatom of the polyoxometalate is important for high activity. Structures without phosphorus or with other heteroatoms have lower activity. The catalysts are effective under both hydrocarbon-rich and oxygen-rich conditions. For butane, the productivity to maleic acid exceeds that of the current industrial standard vanadium phosphorus oxide. With propane, the productivity to acrylic acid is above that of the MoVNbTe mixed-metal oxide. In addition to efficiently catalyzing the selective oxidation of propane and butane, the catalysts are active with feeds containing other substrates such as ethane, isobutane, and toluene. (C) 2003 Elsevier Inc. All rights reserved.

  DOI：

  10.1016/s0021-9517(03)00008-3
• 作为产物：
  描述：

  oxalic acid dihydrate 、 ammonium oxalate monohydrate 、 hydrous titanium(IV) oxide 以 水 为溶剂， 生成 titanium oxalate
  参考文献：
  名称：

  Chemical synthesis of environment-friendly nanosized yellow titanate pigments

  摘要：

  As yellow pigments, nanosized rutile structured Ni0.1W0.1Ti0.8O2 and priderite structured BaNiTi7O16 have been prepared through pyrolysis of precursor solution containing nickel nitrate, dimethyl tungstate, titanium oxalate, triethanolamine (TEA) for the former composition and barium nitrate, nickel nitrate, titanium oxalate, TEA for the later composition, respectively. In the reaction, TEA acts to minimize the agglomeration in the products through formation of a highly branched polymeric framework, which anchors the metal ions for producing nanocrystalline powders. The rutile and priderite structured titanates obtained on heat-treatment of the precursor powders at 800 degrees C and 850 degrees C, respectively, have been characterized by XRD, TGA-DTA, BET surface area measurement, UV-vis spectroscopy, CIE L*a*b* colour parameter measurements, TEM and HRTEM. XRD reveals the purity of the resulting rutile and priderite phases. Their crystallite sizes, average particle sizes and specific surface areas determined from XRD, TEM, and BET surface area measurement are found to be in the range between 25 nm and 30 nm, 25-45 nm and 100-120 m(2)/g, respectively, for both compositions. (C) 2007 Elsevier Ltd. All rights reserved.

  DOI：

  10.1016/j.materresbull.2007.04.001

文献信息

• A substrate-versatile catalyst for the selective oxidation of light alkanes I. Reactivity
  作者：J Holles

  DOI：10.1016/s0021-9517(03)00008-3

  日期：2003.8.15

  The reactivity of niobium and pyridine-exchanged molybdophosphoric (NbPMo(12)pyr) and molybdovanadophosphoric (NbPMol(11)Vpyr) acid catalysts are investigated for the selective oxidation of light alkanes. Productivities and selectivities are presented for the reactions of propane to acrylic acid and n-butane to maleic acid. Pretreatment of the material to 420 degreesC in an inert atmosphere is required to form an active catalyst, and the combination of both niobium and pyridine is necessary for obtaining maximum activity. Vanadium is not essential for the selective formation of maleic acid from butane, but does appear to affect the selective formation of acrylic acid from propane. Other metal cations can be used instead of niobium; however, none are as effective as niobium. Comparison of activity results to those from other molybdate-based structures indicates that high activity requires the use of a reducible molybdenum species. In addition, the central phosphorus heteroatom of the polyoxometalate is important for high activity. Structures without phosphorus or with other heteroatoms have lower activity. The catalysts are effective under both hydrocarbon-rich and oxygen-rich conditions. For butane, the productivity to maleic acid exceeds that of the current industrial standard vanadium phosphorus oxide. With propane, the productivity to acrylic acid is above that of the MoVNbTe mixed-metal oxide. In addition to efficiently catalyzing the selective oxidation of propane and butane, the catalysts are active with feeds containing other substrates such as ethane, isobutane, and toluene. (C) 2003 Elsevier Inc. All rights reserved.
• Chemical synthesis of environment-friendly nanosized yellow titanate pigments
  作者：Soumya Kanti Biswas、Debasis Dhak、Amita Pathak、Panchanan Pramanik

  DOI：10.1016/j.materresbull.2007.04.001

  日期：2008.3

  As yellow pigments, nanosized rutile structured Ni0.1W0.1Ti0.8O2 and priderite structured BaNiTi7O16 have been prepared through pyrolysis of precursor solution containing nickel nitrate, dimethyl tungstate, titanium oxalate, triethanolamine (TEA) for the former composition and barium nitrate, nickel nitrate, titanium oxalate, TEA for the later composition, respectively. In the reaction, TEA acts to minimize the agglomeration in the products through formation of a highly branched polymeric framework, which anchors the metal ions for producing nanocrystalline powders. The rutile and priderite structured titanates obtained on heat-treatment of the precursor powders at 800 degrees C and 850 degrees C, respectively, have been characterized by XRD, TGA-DTA, BET surface area measurement, UV-vis spectroscopy, CIE L*a*b* colour parameter measurements, TEM and HRTEM. XRD reveals the purity of the resulting rutile and priderite phases. Their crystallite sizes, average particle sizes and specific surface areas determined from XRD, TEM, and BET surface area measurement are found to be in the range between 25 nm and 30 nm, 25-45 nm and 100-120 m(2)/g, respectively, for both compositions. (C) 2007 Elsevier Ltd. All rights reserved.