Green preparation method of isothiocyanate compounds
A technology of isothiocyanate and compounds, which is applied in the field of green preparation of isothiocyanate compounds, can solve the problems of difficult solid waste treatment, incomplete dissolution, and reduced product content, so as to avoid post-processing work, low cost, and easy The effect of treatment
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Example Embodiment
[0028]
[0029] Install a stirrer, reflux condenser, and thermometer on a 1000mL four-necked reaction flask, add 496g (1.2mol) 20% sodium thiocyanate aqueous solution and 0.3gN,N-dimethyl-4-aminopyridine to the four-necked flask for 4h 77.3g of 3-chloropropene (1.0mol) was added dropwise at 60°C, and the temperature keeping reaction was completed for 1h. Let stand for phase separation, the organic phase is 100 g (99.2%) of 3-isothiocyanopropyl-1-ene, and the yield is 99.1% (based on 3-chloropropene). The water phase was added to the flask, and 77.3g 3-chloropropene (1.0 mol) was added dropwise at 60°C within 2 hours, and the phases were separated. The organic phase was a mixture of 3-isothiocyanopropyl-1-ene and chloropropene 81.5 g, the concentration of thiocyanate in the wastewater is 4ppm, and the COD is 1814mg / L. Then add 413g (1.0mol) 20% sodium thiocyanate aqueous solution and 0.3g N,N-dimethyl-4-aminopyridine into the four-necked flask, add dropwise the isothiocyanate o...
Example Embodiment
[0030]
[0031] Install a stirrer, reflux condenser, and thermometer on a 1000mL four-necked reaction flask. Add 356g (1.1mol) 20% potassium thiocyanate aqueous solution and 0.2gN,N-dimethyl-4-aminopyridine to the four-necked flask for 4h 138.5g bromobutane (1.0mol) was added dropwise at 98°C, and the temperature keeping reaction was completed for 1h. Let stand for phase separation, the organic phase is 115.9 g (98.8%) of 1-isothiocyanobutane, with a yield of 99.5% (calculated as bromobutane). The water phase was added to the flask, and 138.5g of bromobutane (1.0mol) was added dropwise within 2h at 98°C, and the phases were separated. The organic phase was a mixture of 1-isothiocyanatobutane and bromobutane, 136.2g, in the wastewater The concentration of thiocyanate is 5ppm and COD is 1927mg / L. Then 323.7g (1.0mol) 20% potassium thiocyanate aqueous solution and 0.2g N,N-dimethyl-4-aminopyridine were added to the four-neck flask, and the 1- 136.2g of a mixture of isothiocyanob...
Example Embodiment
[0032]
[0033] Install a stirrer, reflux condenser, and thermometer on a 1000mL four-necked reaction flask. Add 456g (1.2mol) 20% ammonium thiocyanate aqueous solution and 0.3gN,N-dimethyl-4-aminopyridine to the four-necked flask for 4h Add 122.3g of 3-bromopropene (1.0 mol) dropwise at 50°C, and complete the heat preservation reaction for 1 hour. Let stand for phase separation, the organic phase is 99.2 g (99.0%) of 3-isothiocyanopropyl-1-ene, and the yield is 99.2% (based on 3-bromopropene). The water phase was added to the flask, 122.3g of 3-bromopropene (1.0mol) was added dropwise at 50°C within 2h, and the phases were separated. The organic phase was composed of 3-isothiocyanopropyl-1-ene and 3-bromopropene. The mixture is 117.0g, the thiocyanate concentration in the wastewater is 2ppm, and the COD is 1991mg / L. Then add 380g (1.0mol) 20% ammonium thiocyanate aqueous solution and 0.3g N,N-dimethyl-4-aminopyridine into a four-necked flask, and add dropwise the 3-isopropion...
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