三乙醇胺的制備方法

Preparation method of triethanolamine

方法一：

Method 1:

將環氧乙烷、氨水送入反應器中，在反應溫度30-40℃，反應壓力70.9-304kPa下，進行縮合反應生成一、二、三乙醇胺混合液，在90-120℃下經脫水濃縮后，送入三個減壓精餾塔進行減壓蒸餾，按不同沸點截取餾分，則可得純度達99%的一乙醇胺、二乙醇胺和三乙醇胺成品。在反應過程中，如加大環氧乙烷比例，則二、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：工業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雜質。精制時用水蒸氣蒸餾除去乙醇胺，加入氫氧化鈉使三乙醇胺成堿金屬鹽而析出，分離后中和，再進行減壓蒸餾得純品。

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:

用工業品三乙醇胺減壓蒸餾精制提取。

It is refined and extracted by industrial triethanolamine vacuum distillation.

三乙醇胺的合成方法

Synthesis of triethanolamine

1.將環氧乙烷、氨水送入反應器中，在反應溫度30-40℃，反應壓力70.9-304kPa下，進行縮合反應生成一、二、三乙醇胺混合液，在90-120℃下經脫水濃縮后，送入三個減壓精餾Chemicalbook塔進行減壓蒸餾，按不同沸點截取餾分，則可得純度達99%的一乙醇胺、二乙醇胺和三乙醇胺成品。在反應過程中，如加大環氧乙烷比例，則二、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.由環氧乙烷和氨水在30～40℃下、壓力71～304kPa下進行縮合反應而成，其中環氧乙烷與氨的摩爾濃度比約2.0。反應后經精餾塔減壓精餾，截取360℃附近的餾分而得。

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，由于本品揮發性低，吸入性中毒的可能性小，但如沾染和接觸本品，手和前臂的背面可見皮炎和濕疹。因此必須保護手的皮膚。當有氣溶膠時必須保護呼吸器官。在合成纖維生產中，以及金屬加工工業中，應在三乙醇胺的生產或貯運場所安裝排風裝置。應保持個人衛生。穿戴防護用具。更多相關內容就來我們網站http://www.shrisa.cn咨詢吧！

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.shrisa.cn Ask!