| abstract |
Feprona is the important raw and processed materials in chemical industry.The Feprona technological process of production is：1. distill, 2. esterification, 3. methylation reaction, be 4. acidified 1,5. stratification 1,6. extract, 7. 1 is distilled, 8. hydrolysis, is 9. acidified 2,10. stratification 2, extracted, quaternization, stratification 3, extraction, decolorization filtering, salt-forming reaction, crystallisation by cooling, centrifugation are dried. |