三乙醇胺的制备方法

Preparation method of triethanolamine

方法一：

Method 1:

将环氧乙烷、氨水送入反应器中，在反应温度30-40℃，反应压力70.9-304kPa下，进行缩合反应生成一、二、三乙醇胺混合液，在90-120℃下经脱水浓缩后，送入三个减压精馏塔进行减压蒸馏，按不同沸点截取馏分，则可得纯度达99%的一乙醇胺、二乙醇胺和三乙醇胺成品。在反应过程中，如加大环氧乙烷比例，则二、三乙醇胺生成比例增大，可提高二、三乙醇胺的收率。

Ethylene oxide and ammonia water are sent into the reactor. Under the reaction temperature of 30-40 ℃ and the reaction pressure of 70.9-304kPa, the condensation reaction is carried out to produce a mixture of monoethanolamine, diethanolamine and triethanolamine. After dehydration and concentration at 90-120 ℃, the mixture is sent to three vacuum distillation towers for vacuum distillation. Fractions are cut according to different boiling points, and the finished products of monoethanolamine, diethanolamine and triethanolamine with purity of 99% can be obtained. In the reaction process, if the proportion of ethylene oxide is increased, the proportion of diethylamine and triethanolamine will increase, which can improve the yield of diethylamine and triethanolamine.

精制方法：工业品的三乙醇胺含量在80%以上，其余含有1.0%以下的水，2.5%以下的乙醇胺和15%的二乙醇胺以及少量的聚乙二醇等杂质。精制时用水蒸气蒸馏除去乙醇胺，加入氢氧化钠使三乙醇胺成碱金属盐而析出，分离后中和，再进行减压蒸馏得纯品。

Refining method: the content of triethanolamine in industrial products is more than 80%, and the rest contains less than 1.0% water, less than 2.5% ethanolamine, 15% diethanolamine and a small amount of polyethylene glycol and other impurities. During refining, ethanolamine is removed by steam distillation, and sodium hydroxide is added to make triethanolamine precipitate into alkali metal salt. After separation, it is neutralized, and then purified by vacuum distillation.

方法二：

Method 2:

用工业品三乙醇胺减压蒸馏精制提取。

It is refined and extracted by industrial triethanolamine vacuum distillation.

三乙醇胺的合成方法

Synthesis of triethanolamine

1.将环氧乙烷、氨水送入反应器中，在反应温度30-40℃，反应压力70.9-304kPa下，进行缩合反应生成一、二、三乙醇胺混合液，在90-120℃下经脱水浓缩后，送入三个减压精馏Chemicalbook塔进行减压蒸馏，按不同沸点截取馏分，则可得纯度达99%的一乙醇胺、二乙醇胺和三乙醇胺成品。在反应过程中，如加大环氧乙烷比例，则二、三乙醇胺生成比例增大，可提高二、三乙醇胺的收率。

1. Put ethylene oxide and ammonia into the reactor, conduct condensation reaction at reaction temperature of 30-40 ℃ and reaction pressure of 70.9-304kPa to produce mixed solution of monoethanolamine, diethanolamine and triethanolamine, and then dehydrate and concentrate at 90-120 ℃, and then send it to three vacuum distillation Chemicalbook columns for vacuum distillation. Cut off the fractions according to different boiling points to obtain finished products of monoethanolamine, diethanolamine and triethanolamine with purity of 99%. In the reaction process, if the proportion of ethylene oxide is increased, the proportion of diethylamine and triethanolamine will increase, which can improve the yield of diethylamine and triethanolamine.

2.由环氧乙烷和氨水在30～40℃下、压力71～304kPa下进行缩合反应而成，其中环氧乙烷与氨的摩尔浓度比约2.0。反应后经精馏塔减压精馏，截取360℃附近的馏分而得。

2. It is formed by condensation reaction of ethylene oxide and ammonia at 30~40 ℃ and pressure of 71~304kPa, wherein the molar concentration ratio of ethylene oxide and ammonia is about 2.0. After reaction, it is obtained by vacuum distillation in the distillation tower, and the fraction near 360 ℃ is intercepted.

三乙醇胺具有一定的毒性，由于本品挥发性低，吸入性中毒的可能性小，但如沾染和接触本品，手和前臂的背面可见皮炎和湿疹。因此必须保护手的皮肤。当有气溶胶时必须保护呼吸器官。在合成纤维生产中，以及金属加工工业中，应在三乙醇胺的生产或贮运场所安装排风装置。应保持个人卫生。穿戴防护用具。更多相关内容就来我们网站http://www.jinhao360.com咨询吧！

Triethanolamine has certain toxicity. Due to the low volatility of the product, the possibility of inhalation poisoning is small. However, dermatitis and eczema can be seen on the back of hands and forearms if the product is contaminated or contacted. Therefore, the skin of hands must be protected. Respiratory organs must be protected when aerosols are present. In synthetic fiber production and metal processing industry, exhaust devices should be installed in the production or storage and transportation sites of triethanolamine. Personal hygiene should be maintained. Wear protective equipment. Come to our website for more relevant content http://www.jinhao360.com Ask!