顺酐在纯态下是无色或白色固体，有一种难闻的气味。它还具有两类化学能群，这使得它在化学合成和其他应用中非常有用。
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.
过去，工厂是通过苯或其他芳香族化合物的氧化来制备的。但随着部分材料上涨，工厂将使用正丁烷作为原料。苯和丁烷被送入热气流中，在高温下通过催化剂床层。然后，工作人员将对空气和碳氢化合物进行控制，从而降低混合物中发生火灾的可能性。其次，产品将通过出料口排出。
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.
同时，它具有两类化学能群，因此在化学合成等应用中得到广泛的应用。此外，她还广泛应用于合成表面活性剂、杀虫剂、除草剂和剂。
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，工业上顺酐的工艺路线按原料可分为苯氧化法、正丁烷法氧化法、C4烯烃法和苯酐副产法4种。
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，苯氧化法应用为广泛，但由于苯资源有限，C4烯烃和正丁烷为原料顺酐的技术应运而生，尤其是富产天然气和油田伴生气的，拥有大量的正丁烷资源，因此近年来正丁烷氧化法顺酐的技术发展迅速，已经在顺酐中占主导地位。C4烯烃氧化法因副产物较多已被淘汰，而苯酐副产法顺酐产量有限。摘自六鉴投资网《顺酐技术与市场调研报告》《 顺酐投资分析报告》《10万吨/年顺酐项目投资建议书》
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国顺酐普遍采用的工艺。我国主要采用苯氧化法，经过多年的开发应用，工艺比较成熟，同时具有工艺简单、操作容易、投资省、收率高等特点。
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.
顺酐产品成本50%左右是原料费用，已工业化的顺酐技术都是以控制大收率来确定工艺条件。
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.
与传统苯法相比，正丁烷氧化法具有原料价廉、污染小等优点。
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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