Method for preparing high-purity 9-fluorenone from high-purity fluorene
A high-purity, fluorenone technology, which is applied in the preparation of carbon-based compounds, chemical instruments and methods, and the preparation of organic compounds, can solve the problems of large solvent loss, undisclosed types of quaternary ammonium salts, and high reaction temperature, so as to improve utilization efficiency effect
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Embodiment 1
[0050] Take 15g of the above refined fluorene into a 250mL three-necked flask, add 45mL xylene, 0.20g tetrabutylammonium chloride, 6g NaOH and 9mL water, heat in a 40℃ water bath, control the mechanical stirring rate to 200r / min, and pass clean air 200×2mL / min. During the reaction, the conversion rate of fluorene was monitored by thin layer chromatography. After 3.5 hours of reaction, the raw material point disappeared, and the reaction was continued for 0.5 hours to stop the reaction. The reaction solution was transferred to a separatory funnel for liquid separation, and the organic layer was taken and washed with water to neutrality. Gas chromatography detection showed 100% conversion of fluorene, with only one absorption peak of fluorenone.
Embodiment 2
[0052] Except that 0.30g of tetrabutylammonium hydrogen sulfate is used instead of 0.20g of tetrabutylammonium chloride, the others are the same as in Example 1. After 3 hours of reaction, TLC showed that the fluorene spots of the raw material disappeared completely, and the reaction was continued for 0.5 hours to stop the reaction. Chromatographic analysis of the organic layer showed 100% conversion of fluorene, with only one absorption peak of fluorenone.
Embodiment 3
[0054] Except that 0.30g of tetrabutylammonium bromide replaces 0.20g of tetrabutylammonium chloride, the others are the same as in Example 1. After 3.5 hours of reaction, TLC showed that the fluorene spots of the raw material disappeared completely, and the reaction was continued for 0.5 hours to stop the reaction. Chromatographic analysis of the organic layer showed 100% conversion of fluorene, with only one absorption peak of fluorenone.
PUM
Abstract
Description
Claims
Application Information
- R&D Engineer
- R&D Manager
- IP Professional
- Industry Leading Data Capabilities
- Powerful AI technology
- Patent DNA Extraction
Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.
© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com