相关实验视频

Updated: Jun 20, 2025

A Simple and Efficient Protocol for the Catalytic Insertion Polymerization of Functional Norbornenes

A Simple and Efficient Protocol for the Catalytic Insertion Polymerization of Functional Norbornenes

Published on: February 27, 2017

一种超交联聚合物的定制后合成化,用于从三级C2气体混合物中单步乙烯净化

Su Min Lee¹, Hongryeol Yun¹, Minjung Kang¹

¹Department of Chemistry, Korea University, Seoul, 02841, Republic of Korea.

|July 17, 2024

概括

这项研究开发了一种新的化多孔聚合物,用于从气体混合物中选择性净化乙烯. 功能化聚合物证明了乙烯与乙和乙的有效分离,这是一个关键的工业挑战.

科学领域:

材料科学材料科学材料科学
化学工程是化学工程的重要组成部分.
分离科学分离科学

背景情况:

从工业上分离乙烯 (C2H4) 从乙烯 (C2H2) 和乙 (C2H6) 是至关重要的,但由于相似的特性,这是困难的.
现有的方法在实现这种三元混合物的高选择性和效率方面面临挑战.

研究的目的:

开发一种后合成功能化的多孔有机聚合物,用于从三元C2H2/C2H4/C2H6混合物中有针对性地分离乙烯.
为了研究化度对聚合物的吸附和分离性能的影响.

主要方法:

通过溶剂编织合成一个超交联聚合物 (HCP).
对HCP进行后合成化,以产生具有不同化水平的HCP-NO2-1和HCP-NO2-2.
使用三元混合物的气体吸附和分离实验.
计算模拟和突破性测试以验证分离能力.

主要成果:

化物显著改变了吸附选择性,从C2H6 > C2H4 ≈ C2H2 (HCP) 到C2H2 > C2H6 > C2H4 (HCP-NO2-1) 和C2H2 > C2H4 ≈ C2H6 (HCP-NO2-2).
通过结合酸性质子-极性基和C-H⋅⋅⋅π相互作用,HCP-NO2-1实现了从三元混合物中选择性分离C2H4.
通过模拟和突破性测试证实了成功分离.

结论:

合成后化提供了一种可控的策略,用于调整有机聚合物以适应特定的气体分离.
这项工作介绍了有孔的有机聚合物第一次成功的合成后功能化,用于从三元混合物中净化乙烯.
开发的材料显示了对烯/烯和烯/烯分离的工业应用的希望.

关键词:

碳化合物分离的方法超交叉连接的聚合物.极地群是一个极地群.合成后的修饰是一种合成后的修饰.

更多相关视频

Isolating Free Carbenes, their Mixed Dimers and Organic Radicals

Isolating Free Carbenes, their Mixed Dimers and Organic Radicals

Published on: April 19, 2019

Depolymerizable Olefinic Polymers Based on Fused-Ring Cyclooctene Monomers

Depolymerizable Olefinic Polymers Based on Fused-Ring Cyclooctene Monomers

Published on: December 16, 2022

相关概念视频

Olefin Metathesis Polymerization: Acyclic Diene Metathesis (ADMET)

Olefin Metathesis Polymerization: Acyclic Diene Metathesis (ADMET)

Acyclic diene metathesis polymerization or ADMET polymerization involves cross-metathesis of terminal dienes, such as 1,8-nonadiene, to give linear unsaturated polymer and ethylene. As ADMET is a reversible process, the formed ethylene gas must be removed from the reaction mixture to complete the polymerization process.
Similar to cross-metathesis, ADMET also involves the formation of metallacyclobutane intermediate by [2+2] cycloaddition of one of the double bonds of a terminal diene with...

Ziegler–Natta Chain-Growth Polymerization: Overview

Ziegler–Natta Chain-Growth Polymerization: Overview

Ziegler–Natta polymerization is another form of addition or chain‐growth polymerization used for synthesizing linear polymers over branched polymers. The catalyst used for polymerization is the Ziegler–Natta catalyst, named after Karl Ziegler and Giulio Natta, who developed it in 1953. This catalyst is an organometallic complex of titanium tetrachloride and triethyl aluminum, with the active form of the catalyst being an alkyl titanium compound. Using the Ziegler–Natta...

Olefin Metathesis Polymerization: Overview

Olefin Metathesis Polymerization: Overview

Recently, the development of olefin metathesis polymerization advanced the field of polymer synthesis. Simply put, the reorganization of substituents on their double bonds between two olefins in the presence of a catalyst is known as the olefin metathesis reaction. The use of metathesis reaction for polymer synthesis is called olefin metathesis polymerization.
Ruthenium-based Grubbs catalyst is the most commonly used catalyst for olefin metathesis polymerization. Grubbs catalyst consists...

Free-Radical Chain Reaction and Polymerization of Alkenes

Free-Radical Chain Reaction and Polymerization of Alkenes

The conversion of alkenes to macromolecules called polymers is a reaction of high commercial importance. The structure of the polymer is defined by a repeating unit, while the terminal groups are considered insignificant. The average degree of polymerization represents the number of repeating units in the polymer molecule and is denoted by the subscript n.

Reduction of Alkynes to cis-Alkenes: Catalytic Hydrogenation

Reduction of Alkynes to cis-Alkenes: Catalytic Hydrogenation

Introduction
Like alkenes, alkynes can be reduced to alkanes in the presence of transition metal catalysts such as Pt, Pd, or Ni. The reaction involves two sequential syn additions of hydrogen via a cis-alkene intermediate.

Preparation of Nitriles

Preparation of Nitriles

One of the common methods to prepare nitriles is the dehydration of amides. This method requires strong dehydrating agents like phosphorous pentoxide or boiling acetic anhydride for converting amides to nitriles. Another reagent namely, thionyl chloride also accomplishes the dehydration of amides, where amide acts as a nucleophile. The first step of the mechanism involves the nucleophilic attack by the amide on the thionyl chloride to form an intermediate. In the next step, the electron pairs...