synthesis of sodium bromoethyl sulfonate 61.5kg 1,2-dibromoethane, 125 L of 95% ethanol and 50 L of water are sequentially added to the reaction kettle. after heating to boiling state under stirring, sodium sulfite aqueous solution (12.5kg of sodium sulfite is added to 50 L of water) is started to be added dropwise. Reflux 2 h after drip guard. Steam out unreacted low-boiling substances. The residue is moved into the evaporator and evaporated and dried to obtain the product (crude 2-bromoethyl sulfonate).
Condensation of sodium 2-bromoethyl sulfonate and alkyl imidazoline equimolar sodium 2-bromoethyl sulfonate and alkyl imidazoline were successively put into the reaction kettle, then 20 L of water was added, and heated to 80~90 ℃ under stirring. Slowly add 10% NaOH aqueous solution and reflux for 5 h to obtain the product.