resolve resolution
1. Ethylene oxide and ammonia are fed into a reactor, and a condensation reaction is performed at a reaction temperature of 30-40° C. and a reaction pressure of 70.9-304 kPa to form a mixture of mono-, di-, and triethanolamines, and the mixture is passed at 90-120° C. After dewatering and concentrating, it is sent to three vacuum distillation towers for vacuum distillation, and the fractions are cut according to different boiling points to obtain monoethanolamine, diethanolamine and triethanolamine products having a purity of 99%. In the course of the reaction, if the proportion of ethylene oxide is increased, the proportion of diethanolamine and triethanolamine increases, and the yield of diethanolamine and triethanolamine can be increased.
Refinement method: The triethanolamine content of industrial products is more than 80%, and the rest contains 1.0% or less of water, 2.5% or less of ethanolamine and 15% of diethanolamine, and a small amount of impurities such as polyethylene glycol. During the purification, ethanolamine was distilled off by steam distillation, triethanolamine was added as an alkali metal salt by addition of sodium hydroxide, precipitated, separated and neutralized, and then distilled under reduced pressure to obtain a pure product.
2. Refined extraction with industrial ethanol distillation under reduced pressure.
Recommended reading: Triethanolamine Price: http://Products/241.html
Roller Hook Tomato Plant Support
Roller Hook Tomato Plant Support,Tomato Trellis-trellising,Greenhouse Tomato Plant,Accessory Trellising Roller Hook
JIANGSU SKYPLAN GREENHOUSE TECHNOLOGY CO.,LTD , https://www.engreenhouse.com