2-methylpentyl ether

• 分子结构分类: 有机化合物 - 有机氧化合物
• 英文名称: 2-methylpentyl ether
• 英文别名: di-(2-methylpentyl) ether；DMPE；2-Methyl-1-(2-methylpentoxy)pentane
• 化学式: C₁₂H₂₆O
• 分子量: 186.338
• InChiKey: PWRRZALULPEHOC-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  4.5
• 重原子数：
  13
• 可旋转键数：
  8
• 环数：
  0.0
• sp3杂化的碳原子比例：
  1.0
• 拓扑面积：
  9.2
• 氢给体数：
  0
• 氢受体数：
  1

反应信息

• 作为产物：
  描述：

  2-甲基-1-戊醇 在 氢气 作用下， 125.0 ℃ 、101.33 kPa 条件下， 生成 2-methylpentyl ether
  参考文献：
  名称：

  醛，醇及其混合物在Pd / SiO 2催化剂上的醚化

  摘要：

  由醛和醇在负载的Pd催化剂上的醚化反应选择性地生产了二烷基醚。当在125℃下以1：1的摩尔比进料2-甲基戊醛与2-甲基戊醇时，观察到79％的醚产率和90％的选择性。正丁醇与2-甲基戊醛的交叉醚化显示出比单独进料醇或醛时观察到的速率高得多的速率。此增强的活性是与用于大合奏允许表面醇盐物种的催化剂需求线旁η 2吸附的醛。当仅进料醛或醇时，醚化主要是由于醛-醇相互转化以产生必要的共反应物而引起的。在相同反应条件下，随着金属负载量的增加，醚的收率按Pd> 16> 10> 3 wt。％的顺序降低。升高还原温度也会提高醚的收率。显然，醚化对金属颗粒的形态高度敏感，这与需要容纳两个相邻吸附位点的集合体是一致的。

  DOI：

  10.1016/j.apcata.2010.03.014

文献信息

• Reaction network of aldehyde hydrogenation over sulfided Ni?Mo/AlO catalysts
  作者：X WANG、R SALEH、U OZKAN

  DOI：10.1016/j.jcat.2004.12.010

  日期：2005.4.1

  A reaction network of aldehyde hydrogenation over NiMoS/Al2O3 catalysts was studied with aldehydes with straight and branched carbon chains and different chain lengths as feed materials. The reactions in the gas phase and the liquid phase were compared. The main reaction in the aldehyde hydrogenation process is the hydrogenation of the CO double bond, which takes place over the coordinatively unsaturated

  以碳链为直链和支链，链长不同的醛为原料，研究了NiMoS / Al 2 O 3催化剂上醛加氢反应网络。比较了气相和液相中的反应。醛加氢过程中的主要反应是CO双键的加氢，该加氢发生在配位不饱和位点上。主要的副反应是醛的自缩合和醛与醇的缩合。这两个反应都涉及α-氢，并且主要由暴露的Al 2 O 3表面上的酸碱双功能位点催化。
• Method of extracting bitumen from oil sands with a propylene oxide capped glycol
  申请人：Dow Global Technologies LLC

  公开号：US10138719B2

  公开（公告）日：2018-11-27

  Oil sands may be surface mined and transported to a treatment area or may be treated directly by means of an in situ process of oil sand deposits that are located too deep for strip mining. A bitumen recovery process may be used to extract bitumen from oil sands. Specifically, the bitumen recover process involves a step of treating oil sands with a propylene oxide capped glycol ether described by the structure: RO—(C2H4O)n—CH2CH(CH3)OH wherein R is a linear, branched, or cyclic alkyl, phenyl, alkyl phenyl group and n is 1 to 10.

  油砂可在地表开采并运往处理区，也可通过原地工艺直接处理太深而无法剥离开采的油砂矿藏。沥青回收工艺可用于从油砂中提取沥青。具体来说，沥青回收工艺包括用结构描述的环氧丙烷封端乙二醇醚处理油砂的步骤： RO-(C2H4O)n-CH2CH(CH3)OH 其中 R 为线性、支链或环状烷基、苯基、烷基苯基，n 为 1 至 10。
• Enhanced steam extraction of bitumen from oil sands
  申请人：Dow Global Technologies LLC

  公开号：US10633593B2

  公开（公告）日：2020-04-28

  The present invention relates to an improved bitumen recovery process from oil sands. The oil sands may be surface mined and transported to a treatment area or may be treated directly by means of an in situ process of oil sand deposits that are located too deep for strip mining. Specifically, the present invention involves the step of treating oil sands with an ethylene oxide capped glycol ether described by the structure: RO—(CH2CH(CH3)O)m(C2H4O)nH wherein R is a linear, branched, cyclic alkyl, phenyl, or alkyl phenyl group of greater than 5 carbons and m and n are independently 1 to 3.

  本发明涉及一种改进的油砂沥青回收工艺。油砂可以在地表开采并运往处理区，也可以直接通过原地工艺处理太深而无法剥离开采的油砂矿床。具体来说，本发明涉及用环氧乙烷封端乙二醇醚处理油砂的步骤，该乙二醇醚的结构如下：RO-(CH2CH(CH3)O)m(C2H4O)nH，其中 R 是大于 5 个碳原子的直链、支链、环状烷基、苯基或烷基苯基，m 和 n 独立地为 1 至 3。
• Composition for steam extraction of bitumen
  申请人：Dow Global Technologies LLC

  公开号：US10941347B2

  公开（公告）日：2021-03-09

  The present invention relates to a bitumen recovery process from oil sands. The oil sands may be surface mined and transported to a treatment area or may be treated directly by means of an in situ process of oil sand deposits that are located too deep for strip mining. Specifically, the present invention involves the step of treating oil sands with a composition comprising an alkanolamine and an ethylene oxide capped glycol ether and/or propylene oxide capped glycol ether.

  本发明涉及一种从油砂中回收沥青的工艺。油砂可以在地表开采并运送到处理区，也可以直接通过原地工艺处理太深而无法剥离开采的油砂矿床。具体来说，本发明涉及用一种包含烷醇胺和环氧乙烷封端乙二醇醚和/或环氧丙烷封端乙二醇醚的组合物处理油砂的步骤。
• Conversion of furfural and 2-methylpentanal on Pd/SiO2 and Pd–Cu/SiO2 catalysts
  作者：Surapas Sitthisa、Trung Pham、Teerawit Prasomsri、Tawan Sooknoi、Richard G. Mallinson、Daniel E. Resasco

  DOI：10.1016/j.jcat.2011.02.006

  日期：2011.5

  The conversion of furfural (FAL) and 2-methylpentanal (MPAL) under hydrogen has been studied over silica-supported monometallic Pd and bimetallic Pd-Cu catalysts. At low space times, the conversion of MPAL yields primarily pentane (decarbonylation), but at higher space times, di-methylpentyl ether (etherification) becomes the main product. Upon addition of Cu, both the overall activity and the decarbonylation selectivity decrease while the selectivity to hydrogenation and etherification increases. In contrast to MPAL, the conversion of FAL shows no etherification products at any space time in the temperature range 210-250 degrees C but only produces furan via decarbonylation. It is proposed that the presence of the aromatic ring in the furfural molecule has a marked effect in inhibiting the formation of the alkoxide surface intermediate, which is required in the etherification reaction. Density Functional Theory (DFT) calculations of furfural and 2-methyl pentanal have been conducted to gain a better understanding of the differences in the molecule-surface interactions between the aldehydes and the Pd and Pd-Cu surfaces. The reaction mechanisms and the resulting selectivity towards the possible reaction paths (hydrogenation/etherification/decarbonylation) are discussed in terms of the relative stability of the eta(2)-(C,O) and acyl surface species occurring on the different metal surfaces. Published by Elsevier Inc.