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相关概念视频

Solvents01:12

Solvents

64.5K
A solvent is a substance, most often a liquid, that can dissolve other substances. Here, the substance being dissolved is called a solute. When a solvent and a solute combine, they form a solution - a homogenous mixture of both the solvent and the solute. Water is a universal biological solvent. Its polar structure allows it to dissolve many other polar compounds. The ability of water to dissolve is governed by a balance between water molecules binding to each other and binding to the solute.
A...
64.5K
Sample Preparation for Analysis: Advanced Techniques01:08

Sample Preparation for Analysis: Advanced Techniques

328
Accurate analysis of complex samples often requires advanced preparation techniques to achieve reliable and reproducible results. Samples containing inorganic or organic materials can be challenging to dissolve or decompose effectively. Standard sample preparation methods include acid digestion, fusion, dry ashing, and wet digestion.
Acid digestion with strong acids is commonly used to dissolve inorganic materials that are insoluble (do not dissolve) in water. This method can be useful for...
328
Titration in Nonaqueous Solvents01:16

Titration in Nonaqueous Solvents

794
Most acid-base titrations are performed in an aqueous medium. In aqueous titrations, water competes with weaker acids or bases for proton donation or acceptance, leading to ambiguous endpoints in the titration curve. Water also affects the partial ionization of weak acids or bases. For example, water accepts a proton from acetic acid to form hydronium and acetate ions. The hydronium ion formed is a stronger acid than acetic acid, and the acetate ion is a stronger base than water. As a result,...
794
Entropy and Solvation02:05

Entropy and Solvation

7.0K
The process of surrounding a solute with solvent is called solvation. It involves evenly distributing the solute within the solvent. The rule of thumb for determining a solvent for a given compound is that like dissolves like. A good solvent has molecular characteristics similar to those of the compound to be dissolved. For example, polar solutions dissolve polar solutes, and apolar solvents dissolve apolar solutes. A polar solvent is a solvent that has a high dielectric constant (ϵ...
7.0K
Leveling Effect and Non-Aqueous Acid-Base Solutions02:11

Leveling Effect and Non-Aqueous Acid-Base Solutions

8.1K
This lesson defines the leveling effect in acidic and basic solutions and its role in aqueous and non-aqueous solutions. It is essential to understand the competing nature of various species in a chemical system.
The Leveling Effect of a Solvent
A generic acid (HA) reacts with the generic base (B-) to yield the corresponding conjugate base (A-) and conjugate acid (HB):
8.1K
Extraction: Advanced Methods00:56

Extraction: Advanced Methods

446
Metal ions can be separated from one another by complexation with organic ligands–the chelating agent– to form uncharged chelates. Here, the chelating agent must contain hydrophobic groups and behave as a weak acid, losing a proton to bind with the metal. Since most organic ligands used in this process are insoluble or undergo oxidation in the aqueous phase, the chelating agent is initially added to the organic phase and extracted into the aqueous phase. The metal-ligand complex is...
446

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相关实验视频

Updated: Jun 27, 2025

Preparation of Binary and Ternary Deep Eutectic Systems
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Preparation of Binary and Ternary Deep Eutectic Systems

Published on: October 31, 2019

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完全无机的深度环氧溶剂,用于高效和可回收的液体-液体接口催化.

Lixian Xu1, Jie Yin1, Jing He1

  • 1Institute for Energy Research, Jiangsu University, Zhenjiang, 212013, P. R. China.

Advanced materials (Deerfield Beach, Fla.)
|April 29, 2024
PubMed
概括

这项研究引入了一种无机深度溶解剂 (IDES) 用于燃料脱硫. 这种新型催化剂提供了增强的稳定性和可回收性,克服了传统有机催化剂的局限性.

关键词:
无机深层欧性溶剂 无机深层欧性溶剂液体液体接口的催化作用氧化过程中的氧化.产品的自我分离产品的自我分离超深度脱硫处理 超深度脱硫处理

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Preparation of Monodomain Liquid Crystal Elastomers and Liquid Crystal Elastomer Nanocomposites
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Separation of Aldehydes and Reactive Ketones from Mixtures Using a Bisulfite Extraction Protocol
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Preparation of Monodomain Liquid Crystal Elastomers and Liquid Crystal Elastomer Nanocomposites
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科学领域:

  • 催化剂是一种催化剂.
  • 绿色化学 绿色化学
  • 材料科学 材料科学 材料科学

背景情况:

  • 基于有机酸的深溶剂 (DES) 由于有机氧化产品的积累,在催化应用中表现出不良的稳定性和可回收性.
  • 这种限制阻碍了它们在燃料脱硫等过程中的实际使用.

研究的目的:

  • 开发一种新型的无机深溶剂 (IDES),用于增强燃料的催化脱硫.
  • 为了证明与有机DES相比,IDES的稳定性,可回收性和催化性能优越.
  • 阐明IDES在氧化脱硫的有效性背后的机制.

主要方法:

  • 使用化物 (ZnCl2) 和酸 (PA) 制造一种无机深度浸泡溶剂 (IDES).
  • 实施用于燃料脱硫的液体-液体接口催化.
  • 实验和理论研究 (例如,DFT) 来研究催化机制和相互作用.

主要成果:

  • IDES显示出异常稳定性和可回收性,可在不经处理的情况下至少重复使用15个循环,因为无机性质可以防止产品在溶剂阶段积累.
  • 与有机DES相比,IDES表现出优越的催化氧化脱硫性能.
  • 确定了Zn···OP协调和强大的吸附能量是增强H2O2激活和硫化物氧化的关键因素.

结论:

  • 研发的无机深溶剂 (ZnCl2/PA) 提供了一个高度稳定和可回收的平台,通过液体-液体接口催化,通过高效的燃料脱硫.
  • 这项工作在促进可持续化学过程的催化剂设计方面取得了重大进展,解决了现有技术的关键局限性.