Method for preparing 6-nitroveratric acid from veratric acid in micro-channel reactor
The invention provides a method for preparing 6-nitroveratric acid from veratric acid through a micro-channel reactor, aiming at solving the problems of low product yield, low purity and the like caused by large dilute nitric acid usage amount, difficulty in heat release control, much acidic wastewa...
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| Format: | Patent |
| Sprache: | chi ; eng |
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| Zusammenfassung: | The invention provides a method for preparing 6-nitroveratric acid from veratric acid through a micro-channel reactor, aiming at solving the problems of low product yield, low purity and the like caused by large dilute nitric acid usage amount, difficulty in heat release control, much acidic wastewater, low production efficiency and more reaction ectopic nitration products in the existing method for preparing 6-nitroveratric acid through nitration. The invention provides the method for preparing 6-nitroveratric acid from veratric acid through the micro-channel reactor. According to the method, acetic acid is used as a solvent, veratric acid and concentrated nitric acid are used as raw materials, the reaction is performed in the micro-channel reactor, continuous production is realized, reaction heat release is easy to control, the production period is greatly shortened, the yield of 6-nitroveratric acid can reach 85% or above, and the purity of 6-nitroveratric acid can reach 99% or above.
针对现有通过硝化制备6-硝基藜芦酸的方法存 |
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