Fluorosilicate porous hybrid material as well as preparation method and application thereof

A technology of fluorosilicate and copper fluorosilicate is applied in the field of fluorosilicate porous hybrid materials and their preparation, which can solve the problems of high energy consumption and high cost, and achieve large adsorption capacity, enhanced identification, and separation selectivity. high effect
CN112295550APending Publication Date: 2021-02-02ZHEJIANG UNIV OF TECH
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
ZHEJIANG UNIV OF TECH
Publication Date
2021-02-02

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Abstract

The invention relates to the technical field of industrial gas separation, in particular to a fluosilicate porous hybrid material and a preparation method and application thereof. The structural general formula of the fluosilicate porous hybrid material is [Cu(dpds)2(SiF6)]n, and dpds is 4,4'-dipyridyl disulfide. A metal salt used by the fluosilicate porous hybrid material is copper hexafluorosilicate, the organic ligand is 4,4'-dipyridyl disulfide, and the fluosilicate porous hybrid material is an anionic pillared metal organic framework material with a proper pore diameter and a proper fluorination functional site; the preparation method is low in raw material price, cost-saving, simple to operate, easy to control conditions and easy to industrialize; and the fluosilicate porous hybrid material provided by the invention has appropriate pore diameter and fluorinated functional sites, can enhance the recognition of acetylene through the action of hydrogen bonds, can separate C2H2 / C2H4mixed gas and / or C2H2 / CO2 mixed gas at the same time, and has higher separation selectivity, larger adsorption capacity and higher separation performance than most existing solid adsorption materials.
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Description

technical field

[0001] The invention relates to the technical field of industrial gas separation, in particular to a fluorosilicate porous hybrid material and its preparation method and application. Background technique

[0002] Ethylene and acetylene are basic chemical raw materials widely used in the production of synthetic chemical products such as synthetic fibers, rubber and plastics. However, due to its industrial production process, ethylene feed gas usually contains about 1% acetylene impurity, which may cause serious troubles in the next polymerization reaction. Because the presence of acetylene will deactivate the catalyst for ethylene polymerization, thereby reducing the quality of polyethylene. In addition, acetylene readily forms explosive metal acetylides. Therefore, it is necessary to control the content of acetylene in ethylene to a certain level (<40ppm) before use.

[0003] Existing methods include solvent absorption of acetylene and selective catalyt...

Claims

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