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Separation and purification method of hexafluoropropylene dimer and adsorbent used in method

An adsorbent and the obtained technology are applied in chemical instruments and methods, organic chemistry, other chemical processes, etc., to achieve the effects of simple production process, cheap and easy-to-obtain raw materials, and safe operation.

Active Publication Date: 2020-06-09
LINHAI LIMIN CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In a word, in the above synthesis process, it is difficult to effectively separate and purify compounds D1 and D2 with a single structure of hexafluoropropylene dimer

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Sieve the alumina powder adsorbent, sieve 100 kg of 50-mesh particles, wash with distilled water to remove impurities, add an ethanol solution with a nickel acetate content of 5 kg, fully mix with the alumina powder, dry at 50°C to remove ethanol, and remove the ethanol at 550°C Calcined for 10 hours, cooled under the protection of dry nitrogen to obtain modified alumina for future use.

Embodiment 2

[0033] Sieve the alumina powder adsorbent, sieve 100 kg of 100-mesh particles, wash with distilled water to remove impurities, add an ethanol solution with a nickel acetate content of 20 kg, fully mix with alumina, dry at 60°C to remove ethanol, and roast at 600°C After 5 hours, cool under the protection of dry nitrogen to obtain modified alumina for later use.

Embodiment 3

[0035] Sieve the alumina powder adsorbent, sieve 100 kg of 80-mesh particles, wash with distilled water to remove impurities, add an ethanol solution with a nickel acetate content of 10 kg, fully mix with alumina, dry at 60°C to remove ethanol, and roast at 750°C 2 hours, cooled under the protection of dry nitrogen to obtain modified alumina for use.

[0036] 2. Preparation of Modified Alumina

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PUM

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Abstract

The invention discloses an adsorbent and a method for separating and purifying hexafluoropropylene dimer by using the adsorbent. The adsorbent is prepared by mixing the following components in parts by mass: 80-85 parts of modified aluminum oxide, 10-15 parts of modified high-temperature clay, 1-5 parts of magnesium oxide and 1-5 parts of silica gel, wherein the modified aluminum oxide is obtainedby modifying aluminum oxide through nickel acetate, and the modified high-temperature clay is obtained by modifying high-temperature clay through nickel acetate. The adsorbent provided by the invention has the advantages of cheap and easily available raw materials, simple preparation process, safe operation and low cost, and can be recycled. The separation and purification method is a green sustainable development separation and purification technology, and is suitable for large-scale production. The method has good separation and purification effects.

Description

technical field [0001] The invention relates to a method for separating and purifying hexafluoropropylene dimer and an adsorbent used therefor, belonging to the technical field of compound purification. Background technique [0002] Hexafluoropropylene dimer is prepared by telomerization of hexafluoropropylene. Hexafluoropropylene is a product of pyrolysis of difluorochloromethane, which can be produced industrially on a large scale, and its properties are relatively stable, so it can be conveniently transported and stored for a long time. The dimer prepared by polymerization of hexafluoropropylene has mild conditions and is easy for industrial production. Hexafluoropropylene dimer is a compound with perfluoro six carbons and a double bond structure. It has three isomers, a pair of cis-trans isomers, which is D1, which is stable and has low toxicity, and can be directly used as a solvent, cleaning agent, and foaming agent; a dimer with a branched chain structure is D2 , h...

Claims

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Application Information

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IPC IPC(8): B01J20/12B01J20/30C07C17/389C07C21/18
CPCB01J20/06B01J20/12B01J20/041B01J20/103C07C17/389B01J2220/42C07C21/18
Inventor 何建明裴文
Owner LINHAI LIMIN CHEM
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