Improved process for preparing 3-methoxyl-4-hydroxybenaldehyde
An improved process for preparing 3-methoxyl-4-hydroxybenzaldehyde features use of toluphenol as starting raw material. In the presence of sodium alkoxide solution, appropriate cobalt salt catalyst is added while oxygen is introduced for aldehydizing reaction to obtain 55-75% of desired product. Aft...
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| Format: | Patent |
| Sprache: | eng |
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| Zusammenfassung: | An improved process for preparing 3-methoxyl-4-hydroxybenzaldehyde features use of toluphenol as starting raw material. In the presence of sodium alkoxide solution, appropriate cobalt salt catalyst is added while oxygen is introduced for aldehydizing reaction to obtain 55-75% of desired product. After acidified, the unreacted substance is recovered to prevent the generation of ortho products. Itsadvantages are high yield of desired product, no need of using toxic substance, and very less waste discharge. |
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