Method for preparing hydroxyethyl (meth) acrylate

A method for preparing hydroxyethyl (meth)acrylate, conducted in a process using a combination of three-stage tubular reactors and a tower reactor, the process comprising the following steps:

• firstly, mixing catalysts, polymerization inhibitors and (meth)acrylic acid until the solids are dissolved;
• then mixing the mixture of the catalysts, polymerization inhibitors and (meth)acrylic acid with ethylene oxide in an amount of 30-80% of the total amount of the ethylene oxide in the whole reaction and thereafter entering a first tubular reactor to react;
• mixing the reaction liquid from the first tubular reactor with ethylene oxide in an amount of 10-50% of the total amount of the ethylene oxide in the whole reaction and thereafter entering a second tubular reactor to react;
• mixing the reaction liquid from the second tubular reactor with ethylene oxide in an amount of 1-30% of the total amount of the ethylene oxide in the whole reaction and thereafter entering a third tubular reactor;
• and
• aging the reaction liquid from the third tubular reactor in a tower reactor to obtain hydroxyethyl (meth)acrylate liquid product.