Preparation method of quaternary ammonium cationic monomer aqueous solution

[0035] Example 1

[0036] The tower reactor is an ordinary rectification tower with an electric heating belt attached to the tower body. The specification is 30×2.5mm and the height is 1.5m. It is equipped with Φ2×2mm stainless steel θ ring packing, and the packing height is 1.3m. Heated by an electric heating belt, the temperature of the tower section is raised to 45°C, dimethylaminoethyl acrylate with a p-hydroxyanisole content of 0.06% and water are fed into the static state at the feed rate of 6g / min and 2.1g / min respectively. The mixer enters the reaction tower from the feed port at the top of the tower reactor after thorough mixing, and the methyl chloride gas enters the reaction tower from the bottom of the tower reactor at a feed rate of 2.3 g / min. The product formed after the reaction mass reacted in the reaction tower for 5 minutes was collected in a glass round bottom flask.

[0037] Analyze the content of dimethylaminoethyl acrylate in the crude product to calculate

[0038] Example 2

[0039] The tower reactor is an ordinary rectification tower with an electric heating belt attached to the tower body. The specification is 30×2.5mm and the height is 1.5m. It is equipped with Φ2×2mm stainless steel θ ring packing, and the packing height is 1.3m. The temperature of the tower section is raised to 35℃ by heating with an electric heating belt. Dimethylaminoethyl acrylate with a hydroquinone content of 0.15% and water are added into the static mixing at the feed rate of 9g / min and 3.2g / min respectively. After being fully mixed, it enters the reaction tower from the top feed port of the tower reactor, and the methyl chloride gas enters the reaction tower from the bottom of the tower reactor at a feed rate of 3.5 g / min. The product formed after the reaction mass reacted in the reaction tower for 4 minutes was collected in a glass round bottom flask.

[0040] Analyze the content of dimethylaminoethyl acrylate in the crude product to calculate the con

[0041] Example 3

[0042] The tower reactor is an ordinary rectification tower with an electric heating belt attached to the tower body. The specification is 30×2.5mm and the height is 1.5m. It is equipped with Φ2×2mm stainless steel θ ring packing, and the packing height is 1.3m. Heated by an electric heating belt, the temperature of the tower section is raised to 55°C, and dimethylaminoethyl methacrylate with a hydroquinone content of 0.1% and water are added simultaneously at a feed rate of 6g / min and 2.0g / min. The static mixer enters the reaction tower from the feed port at the top of the tower reactor after thorough mixing, and the methyl chloride gas enters the reaction tower from the bottom of the tower reactor at a feed rate of 2.1 g / min. The product formed after the reaction mass reacted in the reaction tower for 8 minutes was collected in a glass round bottom flask.

[0043] Analyze the content of dimethylaminoethyl methacrylate in the crude product to calculate the c