順酐在純態下是無色或白色固體，有一種難聞的氣味。它還具有兩類化學能群，這使得它在化學合成和其他應用中非常有用。
Maleic anhydride is a colorless or white solid in pure state and has an unpleasant smell. It also has two kinds of chemical energy groups, which makes it very useful in chemical synthesis and other applications.
過去，工廠是通過苯或其他芳香族化合物的氧化來制備的。但隨著部分材料上漲，工廠將使用正丁烷作為原料。苯和丁烷被送入熱氣流中，在高溫下通過催化劑床層。然后，工作人員將對空氣和碳氫化合物進行控制，從而降低混合物中發生火災的可能性。其次，產品將通過出料口排出。
In the past, factories were prepared by oxidation of benzene or other aromatic compounds. However, as the price of some materials rises, the factory will use n-butane as raw material. Benzene and butane are fed into the hot gas stream and pass through the catalyst bed at high temperature. The staff will then control the air and hydrocarbons to reduce the possibility of fire in the mixture. Secondly, the product will be discharged through the discharge port.
同時，它具有兩類化學能群，因此在化學合成等應用中得到廣泛的應用。此外，她還廣泛應用于合成表面活性劑、殺蟲劑、除草劑和劑。
At the same time, it has two kinds of chemical energy groups, so it has been widely used in chemical synthesis and other applications. In addition, it is widely used in the synthesis of surfactants, pesticides, herbicides and fungicides.
目前，工業上順酐的工藝路線按原料可分為苯氧化法、正丁烷法氧化法、C4烯烴法和苯酐副產法4種。
At present, the production process of maleic anhydride in industry can be divided into benzene oxidation process, n-butane oxidation process, C4 olefin process and phthalic anhydride by-product process according to raw materials.
以前，苯氧化法應用為廣泛，但由于苯資源有限，C4烯烴和正丁烷為原料順酐的技術應運而生，尤其是富產天然氣和油田伴生氣的，擁有大量的正丁烷資源，因此近年來正丁烷氧化法順酐的技術發展迅速，已經在順酐中占主導地位。C4烯烴氧化法因副產物較多已被淘汰，而苯酐副產法順酐產量有限。摘自六鑒投資網《順酐技術與市場調研報告》《 順酐投資分析報告》《10萬噸/年順酐項目投資建議書》
In the past, benzene oxidation method was widely used, but due to the limited benzene resources, the technology of producing maleic anhydride from C4 olefins and n-butane came into being, especially the countries rich in natural gas and oilfield associated gas have a large number of n-butane resources. Therefore, the technology of producing maleic anhydride by n-butane oxidation method has developed rapidly in recent years and has occupied a dominant position in maleic anhydride production. C4 olefin oxidation process has been eliminated due to many by-products, while maleic anhydride, a by-product of phthalic anhydride, has limited output. Excerpt from maleic anhydride technology and Market Research Report, maleic anhydride investment analysis report and investment proposal for 100000 t / a maleic anhydride project of Liujian Investment Network
苯氧化法及正丁烷法是目前各國順酐普遍采用的工藝。我國主要采用苯氧化法，經過多年的開發應用，工藝比較成熟，同時具有工藝簡單、操作容易、投資省、收率高等特點。
Benzene oxidation process and n-butane process are widely used in maleic anhydride production in various countries. Benzene oxidation is mainly used in China. After years of development and application, the process is relatively mature. At the same time, it has the characteristics of simple process, easy operation, low investment and high yield.
順酐產品成本50%左右是原料費用，已工業化的順酐技術都是以控制大收率來確定工藝條件。
About 50% of the cost of maleic anhydride is the cost of raw materials. The industrialized maleic anhydride production technology is to determine the process conditions by controlling the large yield.
與傳統苯法相比，正丁烷氧化法具有原料價廉、污染小等優點。
Compared with the traditional benzene process, n-butane oxidation process has the advantages of low raw material price and less pollution.
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