Process for the production of n-alkylaminoalkyl (meth)acrylates
View Patent ↗The present invention is to provide a method of producing an N-alkylaminoalkyl (meth)acrylate containing a small amount of low boiling components, especially, containing a small amount of raw components, without any complicated operations or special apparatuses. The method of producing an N-alkylaminoalkyl (meth)acrylate comprising the steps of: (A) performing the reaction between the (meth)acrylic acid ester and the N-alkylaminoalkyl alcohol in a presence of a catalyst to obtain a reaction solution containing the N-alkylaminoalkyl (meth)acrylate; (B) distilling out components which have lower boiling points than the N-alkylaminoalkyl (meth)acrylate from the reaction solution obtained by the step (A); and (C) distilling the N-alkylaminoalkyl (meth)acrylate; and further comprising the step of: (D) adjusting water concentration at a range from 0.01 to 1 wt %. in the reaction solution which is located after the step (A) and before the step (C).
1. A method of producing an N-alkylaminoalkyl (meth)acrylate by a reaction between a (meth)acrylic acid ester and an N-alkylaminoalkyl alcohol, comprising:
(A) performing the reaction between the (meth)acrylic acid ester and the N-alkylaminoalkyl alcohol in a presence of a catalyst to obtain a reaction solution containing the N-alkylaminoalkyl (meth)acrylate;
(B) distilling out components which have lower boiling points than the N-alkylaminoalkyl (meth)acrylate from the reaction solution obtained by the step (A); and
(C) distilling the N-alkylaminoalkyl (meth)acrylate;
and further comprising:
(D) adjusting a water concentration at a range from 0.01 to 1 wt % in the reaction solution by introducing water into the reaction solution which is located after the step (A) and before the step (B).
2. The method of producing an N-alkylaminoalkyl (meth)acrylate according to claim 1 , wherein the (meth)acrylic acid ester is a compound represented by the following formula (1):
CH 2 ═CR 1 COOR 2 (1)
wherein R 1 denotes hydrogen or methyl group and R 2 denotes an alkyl group containing 1 to 2 carbon atoms.
3. A method of producing an N-alkylaminoalkyl (meth)acrylate, reusing at least a part of the catalyst contained in a residue remaining after the step (C) of the method of producing an N-alkylaminoalkyl (meth)acrylate according to claim 1 for a reaction between a (meth)acrylic acid ester and an N-alkylaminoalkyl alcohol.
4. A method of producing an N-alkylaminoalkyl (meth)acrylate, reusing at least a part of the catalyst contained in a residue remaining after the step (C) of the method of producing an N-alkylaminoalkyl (meth)acrylate according to claim 2 for a reaction between a (meth)acrylic acid ester and an N-alkylaminoalkyl alcohol.