| 摘要 |
The invention concerns a method for preparing (meth)acrylic esters or anhydrides from acrylic acid of formulae (I), wherein R is H or Me, and R' is alkyl and R'' is alkyl or ethyl substituted by dialkylamino whereof the alkyls can form with the nitrogen atom, a 5-or 6-membered heterocycle, capable of bearing one or several alkyl substituents, OH or =O, or R' is H and R'' is alkyl, the alcohol R''-OH being primary or secondary; or (II) wherein R' is H or Me, functioning preferably in the presence of at least one catalyst, wherein is performed a reaction in a reactor R2 with constant equilibrium displacement provided with a first reactor R1 designed for prior dehydration of the reagents to be involved in the reaction.
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