在很多的化學實驗中都需要一個無水的環(huán)境，這里的無水包括環(huán)境、原料等因素，環(huán)境很好理解，只需使用干燥劑即可完成，而原料中的水分子又該如何去除呢？就以使用氫氧化鉀除水純化二氧六環(huán)為例，給大家介紹一下使用氫氧化鉀除水的方法！

In many chemical experiments, we need an anhydrous environment. The anhydrous environment here includes environment, raw materials and other factors. The environment is well understood, and it can be completed only by using desiccant. How can the water molecules in the raw materials be removed? Take the purification of dioxane by using potassium hydroxide as an example, let me introduce the method of using potassium hydroxide to remove water!

二氧六環(huán)：沸點101.5℃，熔點12℃，折光率1.4424，相對密度1.0336。二氧六環(huán)能與水任意混合，常含有少量二乙醇縮醛與水，久貯的二氧六環(huán)可能含有過氧化物（鑒定和除去參閱乙醚）。

Dioxane: boiling point 101.5 ℃, melting point 12 ℃, refractive index 1.4424, relative density 1.0336. Dioxane can be mixed with water at will, and often contains a small amount of diethanol acetal and water. Dioxane stored for a long time may contain peroxide (refer to ether for identification and removal).

二氧六環(huán)的純化方法，在500mL二氧六環(huán)中加入8mL濃鹽酸和50mL水的溶液，回流6~10h，在回流過程中，慢慢通入氮氣以除去生成的乙醛。

Purification method of dioxane: add 8ml of concentrated hydrochloric acid and 50ml of water to 500ml of dioxane, and refluxe for 6-10h. During the refluxing process, slowly introduce nitrogen to remove the acetaldehyde formed.

冷卻后，加入固體氫氧化鉀，直到不能再溶解為止，分去水層，再用固體氫氧化鉀干燥24h。然后過濾，在金屬鈉存在下加熱回流8~12h，后在金屬鈉存在下蒸餾，壓入饑絲密封保存。精制過的1，4‐二氧環(huán)己烷應當避免與空氣接觸。

After cooling, add solid potassium hydroxide until it cannot be dissolved again, separate the water layer, and then dry it with solid potassium hydroxide for 24h. Then filter, heat and reflux in the presence of metal sodium for 8-12h, distill in the presence of metal sodium, press into hungry silk and seal for storage. The refined 1,4 ‐ dioxane should not be in contact with air.

此外 氫氧化鉀的生產(chǎn)方法以及用途的內(nèi)容，在介紹這部分內(nèi)容前，要對氫氧化鉀有一定的了解，什么是氫氧化鉀呢？氫氧化鉀是一種白色固體物質(zhì)，屬于強堿，腐蝕性強。易溶于水。

In addition, the production method and use of potassium hydroxide. Before introducing this part, we should first have a certain understanding of potassium hydroxide. What is potassium hydroxide? Potassium hydroxide is a white solid substance, which is a strong alkali and highly corrosive. Soluble in water.

在空氣中易吸收二氧化碳和水分，致使變質(zhì)。通常用電解氯化鉀溶液，或?qū)⑻妓徕浐褪胰榉磻谩Ｓ糜谥迫♀淃}和鉀肥皂，還可作干燥劑等。

It is easy to absorb carbon dioxide and water in the air, resulting in deterioration. It is usually obtained by electrolysis of potassium chloride solution or reaction of potassium carbonate and lime milk. It is used to make potassium salt and potassium soap, and also as a desiccant.

使用氫氧化鉀除水純化二氧六環(huán)的過程相關(guān)內(nèi)容就講解到這里了，您對此有什么疑惑需要解答的話，歡迎來我們網(wǎng)站http://www.fahao168.com進行咨詢。

This is all about the process of removing water and purifying dioxane with potassium hydroxide. If you have any questions or need to answer, please come to our website http://www.fahao168.com Consult.