The difference between monoethanolamine diethanolamine triethanolamine
Monoethanolamine: NH2CH2CH2OH
Diethanolamine: NH(CH2CH2OH)2
Triethanolamine: N(CH2CH2OH)3
There are many specific differences, you can check Baidu Encyclopedia. There are differences in melting and boiling points, molecular weights, etc.
The preparation method is through the ring-opening addition of ammonia and ethylene oxide. During the addition process, since one ammonia molecule can be added to one ethylene oxide molecule, it can also be added to two ethylene oxide molecules. It can also add with three ethylene oxide molecules, thus producing three ethanolamines. Afterwards, the addition product is rectified and separated to obtain three kinds of ethanolamines.
Some surfactants are used to react with organic acids. Other similar salt-forming reactions and so on.
There are also reactions using hydroxyl groups. . .
It can also be used as an alkaline agent to absorb CO2, SO2, etc. in the flue gas
It is used as a cross-linking agent in high-resilience sponge foaming. This stuff is corrosive, be careful.
1. Diethanolamine is used as an analytical reagent, an acid gas absorbent, used for the purification of coke gas and other industries, and can be recycled. It is also used in the preparation of detergents, polishing agents, lubricants, softeners, surfactants, etc., and can also be used in organic synthesis.
Used as a thickener and foam improver in shampoos and light detergents, and as a softener in synthetic fiber and leather production. Diethanolamine reacts with 70% sulfuric acid to generate morpholine (ie 1,4-oxazidine) through dehydration and cyclization.
2. Diethanolamine, chemical agent, Chinese name 2,2′-dihydroxydiethylamine, diethanolamine; bishydroxyethylamine; 2,2′-iminobiethanol. Colorless viscous liquid or crystals. It is alkaline and can absorb gases such as carbon dioxide and hydrogen sulfide in the air. Diethanolamine is hygroscopic and sensitive to light and oxygen. This product should be placed in an airtight container and placed under dry, cool and dark conditions.
