Synthesis method of hydrogenated methyl Nadic anhydride
A technology for hydrogenating methylnadic acid anhydride and methylnadic acid anhydride, which is applied in the field of new production methods of hydrogenated methylnadic acid anhydride, can solve the problems of insufficient development and utilization, and achieve good reusability, Reduction of environmental pollution and high product purity
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Embodiment 1
[0017] Add 500g of dimethylcyclopentadiene into a 1L single-necked bottle, heat it to 220°C for cracking and rectification, and obtain 420g of monomeric methylcyclopentadiene with a yield of 84%.
[0018] Add 420g of monomeric methylcyclopentadiene into a 2L autoclave, slowly add maleic anhydride at 10°C under stirring conditions, stop the reaction when no methylcyclopentadiene is detected by gas chromatography, and add Maleic anhydride 235g.
[0019] Add catalyst Ru / rGO 9.4g into the autoclave (the loading capacity of Ru is 5wt.%), feed hydrogen, and carry out catalytic hydrogenation reaction in the autoclave with a temperature of 150°C and a hydrogen pressure of 8MPa for 1 hour, and the gas phase detection , methyl nadic acid anhydride reaction is completed, hot filtration, recovery catalyst, the liquid phase is subjected to vacuum distillation to obtain 384g of hydrogenated methyl nadic acid anhydride, yield 90%. The product purity is 98.3%. 1H NMR (400 MHz, CDCl3), δ / ppm...
Embodiment 2
[0024] Heat 50Kg of di-methylcyclopentadiene to 230°C for pyrolysis and rectification to obtain 45Kg of monomeric methylcyclopentadiene with a yield of 90%.
[0025] Add 45Kg of monomeric methylcyclopentadiene into a 200L autoclave, slowly add maleic anhydride at 15°C under stirring conditions, stop the reaction when no methylcyclopentadiene is detected by gas chromatography, and add Maleic anhydride 25Kg.
[0026] Add 500g of catalyst Ru / rGO into the autoclave (the loading capacity of Ru is 10wt.%), pass in hydrogen, and carry out catalytic hydrogenation reaction in an autoclave with a temperature of 130°C and a hydrogen pressure of 6MPa for 4 hours, and detect by gas phase. After the reaction of methyl nadic acid anhydride was completed, the catalyst was recovered by hot filtration, and the liquid phase was distilled under reduced pressure to obtain 42Kg of hydrogenated methyl nadic acid anhydride, with a yield of 92%. The product purity is 98.6%.
Embodiment 3
[0028] 500Kg of dimethylcyclopentadiene was heated to 230°C for cracking and rectification to obtain 460Kg of monomeric methylcyclopentadiene with a yield of 92%.
[0029] Add 460Kg monomeric methylcyclopentadiene into a 1000L autoclave, slowly add maleic anhydride at 13°C under stirring conditions, stop the reaction when no methylcyclopentadiene is detected by gas chromatography, and add Maleic anhydride 260Kg.
[0030] Add 3.9Kg of catalyst Ru / rGO to the autoclave (the loading capacity of Ru is 8wt.%), feed hydrogen, and carry out catalytic hydrogenation reaction in the autoclave with a temperature of 140°C and a hydrogen pressure of 7MPa for 6 hours, and the gas phase detection , methyl nadic anhydride reaction is completed, hot filtration, catalyst recovery, the liquid phase is subjected to vacuum distillation to obtain hydrogenated methyl nadic anhydride 420Kg, yield 90%. The product purity is 98.1%.
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.
© 2023 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap