Industrial production method of benzaldehyde
A production method and technology of benzaldehyde, applied in chemical instruments and methods, organic chemistry, preparation of nitro compounds, etc., can solve problems such as high environmental damage, poor ortho-para selectivity, and low-purity products
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Examples
Embodiment 1
[0019] S1: Add copper nitrate, water, silver nitrate and catalyst potassium chlorate to the reaction device, raise the temperature to 70°C, add benzaldehyde dropwise, the dropwise addition time is 2 hours, continue to raise the temperature to 95°C, keep the temperature for 2 hours, and get The reaction mixture, wherein the molar ratio of copper nitrate, water, silver nitrate, catalyst potassium chlorate and benzaldehyde is 5:40:1:0.2:1; sampling from the reaction mixture for chromatographic detection, the content of benzaldehyde is less than 0.5%;
[0020] S2: Filter the reaction mixture to remove the copper hydroxide precipitate to obtain the mother liquor, cool the mother liquor to 20°C, and filter the solid to obtain the crude m-nitrobenzaldehyde, the content of o-nitrobenzaldehyde in the crude m-nitrobenzaldehyde less than 0.5%;
[0021] S3: Put the m-nitrobenzaldehyde crude product into the reaction device, add a water-soluble solvent methanol that is 3.0 times the volume...
Embodiment 2
[0023] S1: Add copper nitrate, water, silver nitrate and catalyst potassium chlorate to the reaction device, raise the temperature to 80°C, add benzaldehyde dropwise, the dropwise addition time is 3 hours, continue to raise the temperature to 85°C, keep the temperature for 2.5 hours to react, and get The reaction mixture, wherein the molar ratio of copper nitrate, water, silver nitrate, catalyst potassium chlorate and benzaldehyde is 5:40:1:0.2:1; sampling from the reaction mixture for chromatographic detection, the content of benzaldehyde is less than 0.5%;
[0024] S2: Filter the reaction mixture to remove the copper hydroxide precipitate to obtain the mother liquor, cool the mother liquor to 10°C, and filter the solid to obtain the crude m-nitrobenzaldehyde, the content of o-nitrobenzaldehyde in the crude m-nitrobenzaldehyde less than 0.5%;
[0025] S3: Put the crude product of m-nitrobenzaldehyde into the reaction device, add ethanol, a water-soluble solvent 3.5 times the ...
Embodiment 3
[0027] S1: Add copper nitrate, water, silver nitrate and catalyst potassium chlorate to the reaction device, raise the temperature to 75°C, add benzaldehyde dropwise, the dropwise addition time is 3 hours, continue to raise the temperature to 87°C, keep the temperature for 2.5 hours to react, and get The reaction mixture, wherein the molar ratio of copper nitrate, water, silver nitrate, catalyst potassium chlorate and benzaldehyde is 5:40:1:0.2:1; sampling from the reaction mixture for chromatographic detection, the content of benzaldehyde is less than 0.5%;
[0028] S2: Filter the reaction mixture to remove the copper hydroxide precipitate to obtain the mother liquor, cool the mother liquor to 15°C, and filter the solid to obtain the crude m-nitrobenzaldehyde, the content of o-nitrobenzaldehyde in the crude m-nitrobenzaldehyde less than 0.5%;
[0029] S3: Put the crude m-nitrobenzaldehyde into the reaction device, add isopropanol, a water-soluble solvent 3.2 times the volume ...
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