乙烯酮是一種**化合物，化學(xué)式為 C2H2O。它是*簡單的乙烯酮。它在室溫下是一種有毒氣體，非常不穩(wěn)定。它只能在低溫下儲存。在 0 °C 時，會發(fā)生聚合反應(yīng)。乙烯酮是一種無色氣體;有類似氯和醋酸酐的刺激性氣味;它有毒，吸入后會引起嚴(yán)重的頭痛;可液化成無色液體;熔點-151°C，沸點-56°C。

　　乙烯酮是一種優(yōu)良的?；噭?，是**合成中不可缺少的中間體之一。從乙烯酮、雙乙烯酮開始，可開發(fā)出幾十個系列的精細(xì)化學(xué)品，可廣泛應(yīng)用于醫(yī)藥、農(nóng)藥、染料等領(lǐng)域。、**顏料、香料、食品和飼料添加劑、工程塑料和合成纖維等領(lǐng)域，其開發(fā)和應(yīng)用前景十分廣闊。特別是近年來，隨著乙烯酮氯化合成氯乙酰氯新工藝的開發(fā)以及乙酰丙酮、山梨酸等其他下游產(chǎn)品的開發(fā)，乙烯酮一直處于緊缺狀態(tài)。

　　有許多制備乙烯酮的方法。以醋酸為原料，在負(fù)壓下催化脫水是目前國內(nèi)外制備乙烯酮類產(chǎn)品的主要生產(chǎn)方法。乙烯酮生產(chǎn)采用安全、穩(wěn)定、經(jīng)濟的液環(huán)真空泵。隨著技術(shù)的不斷進步，液環(huán)泵在乙烯酮生產(chǎn)中的應(yīng)用得到進一步優(yōu)化。

　　裂解：裂解爐按操作程序加熱至800℃左右恒溫2小時后，將冰醋酸配成95%溶液，加入汽化器蒸發(fā)成醋酸蒸汽，加入預(yù)熱爐內(nèi)與催化劑磷酸三乙酯一起預(yù)熱。進入裂解爐后，裂解成乙烯酮氣體。

　　分離：乙烯酮氣體、未裂解的乙酸蒸氣和裂解爐產(chǎn)生的水蒸氣混合氣體依次進入**級和第二級套管冷凝器冷凝，稀乙酸從**級和第二級分離出來。第二級分離器。，從二級分離器出來的氣體進入三級列管冷凝器進一步冷凝，分離出稀醋酸，然后氣體通過真空泵吸收塔中產(chǎn)生的各種后續(xù)產(chǎn)物雙烯酮。節(jié)或其他節(jié)產(chǎn)生的乙烯酮。醋酸濃縮后涂抹。

　　在乙烯酮裂解分離過程中，液環(huán)泵起著重要作用，液環(huán)泵是等溫壓縮過程。由于乙烯酮極不穩(wěn)定的性質(zhì)，大大減少了材料的浪費。使用液環(huán)泵對生產(chǎn)更安全，大大避免了冷卻鹽水進入系統(tǒng)的危險，大大減少了真空泵突然故障引起的系統(tǒng)真空度突然下降甚至乙烯酮泄漏;此外，液環(huán)泵更環(huán)保，噪音低，污染小，無需經(jīng)常維護，減少乙烯酮外排。

　　瑞柘環(huán)保生產(chǎn)的真空泵泵送能力從27m3/h到60,000 m3/h。2BE1和2BE3系列常用于生產(chǎn)乙烯酮。具體選型和報價請聯(lián)系我們的專業(yè)銷售團隊。

　　Ketene is an organic compound with a chemical formula of C2H2O. It is the simplest ketene. It is a toxic gas at room temperature and is very unstable. It can only be stored at low temperature. At 0 °C, a polymerization reaction can occur. Ketene is a colorless gas; it has a pungent odor similar to chlorine and acetic anhydride; it is toxic and can cause severe headaches after inhalation; it can be liquefied into a colorless liquid; melting point -151°C, boiling point -56°C.

　　Ketene is an excellent acylating reagent and one of the indispensable intermediates in organic synthesis. Starting from ketene and diketene, dozens of series of fine chemicals can be developed, which can be widely used in medicine, pesticides and dyes. , organic pigments, spices, food and feed additives, engineering plastics and synthetic fibers and other fields, its development and application prospects are very broad. Especially in recent years, with the development of a new process for synthesizing chloroacetyl chloride by chlorination of ketene and the development of other downstream products such as acetylacetone and sorbic acid, ketene has been in short supply.

　　There are many methods for preparing ketene. Taking acetic acid as raw material and catalyzing and dehydrating under negative pressure are the main production methods for preparing ketene products at home and abroad. Safe, stable and economical liquid ring vacuum pump is used in the production of ketene. With the continuous progress of technology, the application of liquid ring pump in ketene production has been further optimized.

　　Cracking: After heating the cracking furnace to a constant temperature of about 800C for 2 hours according to the operating procedures, glacial acetic acid was made into a 95% solution, added to the vaporizer to evaporate into acetic acid vapor, and added to the preheating furnace together with the catalyst triethyl phosphate to preheat. After entering the cracking furnace, cracked into ketene gas.

　　Separation: The mixed gas of ketene gas, uncracked acetic acid vapor and generated water vapor from the cracking furnace enters the first-stage and second-stage casing condensers for condensing in turn, and the dilute acetic acid is separated from the first-stage and second-stage separators. , the gas from the two-stage separator enters the three-stage tube condenser for further condensation, and the dilute acetic acid is separated, and then the gas is passed through a vacuum pump to absorb various follow-up products of diketene produced in the section or ketene produced in other sections. Apply after acetic acid concentration.

　　In the process of cracking and separating ketene, the liquid ring pump plays an important role, and the liquid ring pump is an isothermal compression process. Due to the extremely unstable nature of ketene, the waste of materials is greatly reduced. The use of liquid ring pump is safer for production, which greatly avoids the danger of cooling brine entering the system, and greatly reduces the sudden drop of vacuum in the system or even the leakage of ketene caused by the sudden failure of the vacuum pump; in addition, the liquid ring pump is more environmentally friendly, The noise is low, the pollution is small, and frequent maintenance is not required, which reduces the efflux of ketene.

　　The vacuum pumping capacity of Ruizhe environmental protection production ranges from 27m3 / h to 60000 m3 / h. 2BE1 and 2BE3 series are commonly used in the production of vinyl ketones. Please contact our professional sales team for specific selection and quotation.