2,3,5-三甲基-1,4-二羧基苯 | 18087-49-5

• 分子结构分类: 有机化合物 - 苯类化合物 - 苯和取代衍生物
• 中文名称: 2,3,5-三甲基-1,4-二羧基苯
• 英文名称: 2,3,5-Trimethyl-terephthalsaeure
• 英文别名: 2,3,5-trimethyl-1,4-dicarboxybenzene；2,3,5-Trimethylterephthalic acid
• CAS: 18087-49-5
• 化学式: C₁₁H₁₂O₄
• 分子量: 208.214
• InChiKey: NHSXODFQJIVWRJ-UHFFFAOYSA-N

物化性质

• 熔点：
  285-286 °C
• 沸点：
  394.9±30.0 °C(Predicted)
• 密度：
  1.274±0.06 g/cm3(Predicted)

计算性质

• 辛醇/水分配系数(LogP)：
  2.1
• 重原子数：
  15
• 可旋转键数：
  2
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.27
• 拓扑面积：
  74.6
• 氢给体数：
  2
• 氢受体数：
  4

反应信息

• 作为产物：
  描述：

  2,5-二溴-1,4-二甲基苯 在 lithium aluminium tetrahydride 、 硫酸 、 lithium hydride 作用下， 以 N,N-二甲基甲酰胺 为溶剂， 生成 2,3,5-三甲基-1,4-二羧基苯
  参考文献：
  名称：

  Wals,L.; Nauta,W.T., Recueil des Travaux Chimiques des Pays-Bas, 1968, vol. 87, p. 65 - 68

  摘要：

  DOI：

文献信息

• Meterable fibrous material
  申请人：Weyerhaeuser NR Company

  公开号：EP2302133A2

  公开（公告）日：2011-03-30

  A particle or particles of cellulosic wood pulp fibers having a top and bottom face and a hexagonal perimeter, and methods of using it.

  一种或多种纤维素木浆纤维颗粒，具有上下两面和六边形周边，以及使用方法。
• Sample clean-up device
  申请人：Labor Diagnostika Nord GmbH & Co. KG

  公开号：EP2281630A1

  公开（公告）日：2011-02-09

  The present invention is in the field of sample preparation for analytical methods. In particular, the present invention provides a sample clean-up device and a method for preparing said sample clean-up device. The sample clean-up device is based on the principle of ion exchange chromatography and is preferably in the form of a multiwell plate to be applicable in a high throughput setting. The present invention further provides methods for purifying a sample using said sample clean-up device. Furthermore, a method for analyzing a sample for presence of an analyte comprising purifying the sample using the sample clean-up device of the invention and an analyte-specific detection assay are provided.

  本发明属于分析方法的样品制备领域。特别是，本发明提供了一种样品净化装置和制备所述样品净化装置的方法。该样品净化装置基于离子交换色谱原理，优选采用多孔板形式，以适用于高通量环境。本发明进一步提供了使用所述样品净化装置净化样品的方法。此外，本发明还提供了一种分析样品中是否存在分析物的方法，该方法包括使用本发明的样品净化装置和分析物特异性检测分析法净化样品。
• POLYESTER TEXTILE WASTE RECYCLING
  申请人：Swerea IVF AB

  公开号：EP3363852A1

  公开（公告）日：2018-08-22

  The present invention relates to a method for recycling polyester from a polyester textile. The method comprises the steps of: providing said polyester textile soaked in a mixture comprising a solvent and a catalyst, providing and maintaining a temperature of said mixture comprising said polyester textile within a range of 80-240 °C during depolymerization of polyester in said polyester textile and wherein, in said step of providing said polyester textile soaked in said mixture, said catalyst of said mixture comprises calcium oxide. The invention also relates to use of a catalyst for depolymerization of polyester in a polyester textile, wherein the catalyst comprises calcium oxide.

  本发明涉及一种从聚酯织物中回收聚酯的方法。该方法包括以下步骤：将所述聚酯织物浸泡在由溶剂和催化剂组成的混合物中；在所述聚酯织物中的聚酯解聚过程中，提供并保持由所述聚酯织物组成的所述混合物的温度在 80-240 °C 范围内；其中，在提供浸泡在所述混合物中的所述聚酯织物的步骤中，所述混合物中的所述催化剂包括氧化钙。 本发明还涉及聚酯织物中聚酯解聚催化剂的使用，其中催化剂包括氧化钙。
• Product transport containers
  申请人：Phase Change Energy Solutions, Inc.

  公开号：US10451335B2

  公开（公告）日：2019-10-22

  Product transport containers are disclosed. Such containers can provide one or more advantages compared to existing containers. For example, product transport containers described herein can maintain a product at a desired temperature for an extended period of time, including without the use of an active heating or cooling component. Such product transport containers described herein may also provide improved breathability, thermal insulation, and/or mechanical strength or dimensional stability. Such containers can include a plurality of walls defining an interior volume and a selectively openable side permitting movement of the product into and out of the interior volume of the container. The walls can be formed from a thermoformed non-woven fabric.

  公开了产品运输容器。与现有容器相比，这种容器具有一个或多个优点。例如，本文所述的产品运输容器可以将产品长时间保持在所需温度，包括在不使用主动加热或冷却组件的情况下。本文所述的产品运输容器还可以提供更好的透气性、隔热性和/或机械强度或尺寸稳定性。这种容器可以包括多个限定内部容积的壁和一个可选择打开的侧面，允许产品进出容器的内部容积。壁可由热成型无纺布制成。
• Process for solid-state polycondensation
  申请人：Bühler Thermal Processes AG

  公开号：US10604620B2

  公开（公告）日：2020-03-31

  A method and an apparatus for solid-state polycondensation of polyesters, preferably polyethylene terephthalate and/or copolymers thereof. The method and apparatus are both characterized by a solid-state polycondensation being performed with polyester prepolymer particles in a reaction chamber in which an absolute pressure is in the range from 10 mbar to 200 mbar, and a process gas flow in the range of an R-value of 0.005 to 0.05. The polycondensation is carried out over a time of from 2 to 30 hours and at a temperature of from 180° C. to 5° below a crystalline melting point of the polyester prepolymer particles in order to achieve an intrinsic viscosity of from 0.70 to 0.95 dl/g. The R value is defined as a ratio of an hourly amount of process gas (in kg) flowing through the reaction space to an hourly amount of polymer (in kg) flowing through the reaction space: R = m ⁡ ( gas ) ⁢ / ⁢ h m ⁡ ( polymer ) ⁢ / ⁢ h .

  一种聚酯，最好是聚对苯二甲酸乙二醇酯和/或其共聚物的固态缩聚方法和装置。该方法和设备的特点都是在反应室中与聚酯预聚物颗粒进行固态缩聚，反应室的绝对压力在 10 毫巴到 200 毫巴之间，工艺气体流量在 R 值 0.005 到 0.05 之间。缩聚反应的时间为 2 至 30 小时，温度为 180 摄氏度至低于聚酯预聚物颗粒结晶熔点 5 摄氏度，以达到 0.70 至 0.95 dl/g 的固有粘度。R 值定义为每小时流经反应空间的工艺气体量（公斤）与每小时流经反应空间的聚合物量（公斤）之比： R = m ( 气 ) / h m ( 聚合体 ) / h .