二氯甲烷是一種無色、透明、易揮發的液體，廣泛應用于涂料和固定膜中。二氯甲烷可用作溶劑，而不是二甲苯等苯。它可用于制造不含苯的香蕉水、丁娜水，并可與苯、酮、酯等有機溶劑溶解。它也可用于制備油漆、油墨和稀釋劑。是一種很好的稀釋生產原料。下面來講講二氯甲烷的制備與合成事項。

Dichloromethane is a colorless, transparent and volatile liquid, which is widely used in coatings and fixed films. Dichloromethane can be used as a solvent instead of benzene such as xylene. It can be used to produce banana water and butana water without benzene, and can be dissolved with benzene, ketone, ester and other organic solvents. It can also be used to prepare paints, inks and thinners. It is a good raw material for dilution production. Let's talk about the preparation and synthesis of dichloromethane.

天然氣氯化法：

Natural gas chlorination method:

天然氣與氯氣反應，經水吸收氯化氫副產物鹽酸后，用堿液除去殘留的氯化氫，然后干燥，壓縮，濃縮，蒸餾得到成品，其中氯氣為100％4000，天然氣（標準條件下），甲烷含量為97％1000m3/t，液態堿為100％274。

Natural gas reacts with chlorine gas. After absorbing hydrochloric acid, the by-product of hydrogen chloride by water, the residual hydrogen chloride is removed with alkali liquor, and then dried, compressed, concentrated, and distilled to obtain the finished product, in which chlorine gas is 100% 4000, natural gas (under standard conditions), methane content is 97% 1000m3/t, and liquid alkali is 100% 274.

氯甲烷氯化法：

Methyl chloride chlorination method:

①光氯化是氯甲烷與氯氣在4000kW光下的反應，將反應產物洗滌，壓縮，濃縮，干燥，精餾得到成品；

① Photochlorination is the reaction of methyl chloride and chlorine under 4000kW light. The reaction products are washed, compressed, concentrated, dried and rectified to obtain the finished products;

②熱氯在化學過程中，按照（2-2.5）：1（質量）混合氯甲烷和氯氣，并在400℃的反應溫度和0.2MPa的反應壓力下進行反應。將反應產物洗滌，用堿洗滌，壓縮，濃縮，干燥和精餾以獲得終產物。

② In the chemical process of hot chlorine, methyl chloride and chlorine are mixed according to (2-2.5): 1 (mass), and react at a reaction temperature of 400 ℃ and a reaction pressure of 0.2MPa. The reaction product is washed, washed with alkali, compressed, concentrated, dried and rectified to obtain the final product.

工業上通常通過甲烷的氯化來合成。甲烷氯化生成四種氯甲烷的混合物。但是，由于它們的沸點之間的距離較大，因此可以通過普通的分餾技術方便地分離和純化。

In industry, it is usually synthesized by chlorination of methane. Chlorination of methane produces a mixture of four methyl chloride. However, due to the large distance between their boiling points, they can be easily separated and purified by common fractionation technology.

溫馨提示：二氯甲烷在儲存過程中，由于裝在鐵桶中，二氯甲烷與鐵發生反應，使二氯甲烷溶液變色。因此，在裝填時，必須選擇合適的容器，以避免溶液反應的揮發，使其性能不能得到應用。

Warm tip: During the storage of dichloromethane, the dichloromethane reacts with iron because it is packed in an iron bucket, making the dichloromethane solution discolor. Therefore, proper containers must be selected during filling to avoid volatilization of solution reaction and prevent its performance from being applied.

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The above is the content about the preparation and synthesis of dichloromethane introduced to you. If you have any questions about it, please come to our website http://www.baiyaowl.cn , we will have special technicians to explain to you.