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Molecular formula : C2H7NO
MW : 61.08
CAS No. :141-43-5
nature : ammonia molecules of hydrogen was hydroxyethyl -- CH2CH2OH replaced by a generation of compounds, can be divided into a triethanolamine, diethanolamine and triethanolamine. Often referred to a triethanolamine triethanolamine. One, two, three ethanolamine at room temperature are colorless and transparent liquid viscosity; There hygroscopicity and ammonia smell; With water, ethanol and acetone, etc. Compatibility slightly soluble in ether and carbon tetrachloride; Able to absorb carbon dioxide and hydrogen sulfide; With inorganic acid and organic acid ester produced by the reaction; Both parties alkaline. Triethanolamine the main physical constants are as follows : 10.5 ° C melting point, boiling point of 170 ° C, 58 ° C (0.67kPa), the relative density of 1.0180 (20 / 4 ° C), dynamic viscosity (20 ° C) 24.14mPa s index 1.4540, the flash point of 93.3 ° C 25 ° C benzene in the solubility of 1.4%, in ethanol solubility of 2.1%, the solubility of carbon tetrachloride to 0.2%. The strong role of the emulsion and sparkling role.
Preparation : ethanolamine often exist in phospholipids, and often coexist with choline, also known as biliary amine. The serum protein decomposed fermentation broth discovered triethanolamine. Industrial ethanolamine can be ammonia and ethylene oxide in the reaction. Will ethylene oxide, ammonia into the reactor, the reaction temperature is 30-40 ° C, pressure 70.9 - 304kPa, the condensation reaction for a generation, two, three mixture of ethanolamine, 90-120 ° C by dewatering, it is into the vacuum distillation into 3 OK vacuum distillation, the boiling point of interception by different fractions can be with purity of 99% of a triethanolamine, diethanolamine and triethanolamine finished. In reaction, such as increasing the proportion of ethylene oxide, two, three percentage increases ethanolamine generation can improve two, three ethanolamine yield.
purposes : one mainly for diethanolamine synthetic resin and rubber plasticizers, curing agent, and agent for foaming agent, as well as pesticide, medicine and dyes intermediates. Also synthetic detergents, cosmetics raw materials such as emulsifiers. The textile industry as dyeing agent, antistatic agents, decay agent, detergent. Also as carbon dioxide absorbent, ink additives, oil additives. A widely used as diethanolamine from a variety of gases (such as natural gas) from the acidic components purification liquid. From a triethanolamine hydrochloride cyclization, and can be obtained hexahydrated piperazine. A ethanolamine hydrochloride by chlorinated thionyl chloride, sodium thiosulfate been replaced, can be obtained β - aminoethyl thiosulfate. This is a dye intermediates for the production of polycondensation turquoise 13G. Triethanolamine and a response to carbon disulfide can be obtained in rubber and pharmaceutical industries are sulfur-based applications intermediates thiazoline.
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