Maleic anhydride is an important basic organic chemical raw material, which is the third largest anhydride raw material in the world after acetic anhydride and phthalic anhydride.

顺酐主要用于生产不饱和聚酯树脂（UPR）、醇酸树脂。此外，以顺酐为原料还可以生产1，4-丁二醇（BOD）、γ-丁内酯（GBL）、四氢呋喃（THF）、马来酸、富马酸和四氢酸酐等一系列用途广泛的精细化工产品，在农药、医药、涂料、油墨、润滑油添加剂、造纸化学品、纺织品整理剂、食品添加剂以及表面活性剂等领域具有广泛的应用。

   maleic anhydride is mainly used to produce unsaturated polyester resin (UPR) and alkyd resin. In addition, maleic acid, fumaric acid, tetrahydrofuran, maleic acid, fumaric acid and tetrahydrofuran can also be produced from maleic anhydride, which can be used in pesticide, medicine, coating, ink, lubricant additive, papermaking chemicals, textile finishing agent, food additive and surfactant It has a wide range of applications.

上工业化生产顺酐的工艺路线主要为正丁烷法氧化法，其次为苯氧化法，我国主要采用苯氧化法。

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近年来，我国顺酐的表观消费量不断增加。无论是我国顺酐的生产技术，还是生产能力都得到了很大的发展，但是与国外^相比还存在一些问题。

In recent years, the apparent consumption of maleic anhydride in China has been increasing. Both the production technology and production capacity of maleic anhydride in China have been greatly developed, but there are still some problems compared with foreign countries.

顺酐基本理化性质：

The basic physical and chemical properties of maleic anhydride are as follows

顺丁烯二酸酐系白色斜方形针状结晶，分子式C4H203，分子量98.06，熔点52.8℃，沸点202℃，相对密度1.314，闪点103℃，易升华。顺酐易溶于水、醇和酯，微溶于四氯化碳和粗汽油。顺酐的粉尘和蒸汽均易燃易爆，对人有刺激，而且会烧伤人体皮肤。

    maleic anhydride is a white, oblique, needle like crystal with molecular formula c4h203, molecular weight of 98.06, melting point of 52.8 ℃, boiling point of 202 ℃, relative density of 1.314, flash point of 103 ℃, easy to sublimate. Maleic anhydride is easily soluble in water, alcohol and ester, slightly soluble in carbon tetrachloride and crude gasoline. The dust and steam of maleic anhydride are flammable and explosive, which can stimulate people and burn human skin.

顺酐的贮存及运输等：

Storage and transportation of maleic anhydride, etc

工业顺酐产品包装一般采用聚丙烯编织袋，内衬聚乙烯塑料袋。每袋净重25kg。或20′集装箱可装18吨（打托盘）或20吨（不打托盘）。850Kg 塑编袋20′集装箱可装17吨（打托盘）。

   industrial maleic anhydride products are usually packed in polypropylene woven bags lined with polyethylene plastic bags. The net weight of each bag is 25kg. Or 20 'container can hold 18 tons (pallet) or 20 tons (no pallet). 850kg plastic woven bag 20 'container can hold 17 tons (pallet).

顺酐应贮存于干燥通风的库房内，防火、防潮、防雨淋、防日晒，贮存期三个月—壹年。在贮存运输过程中勿与酸、碱混放，避免与氧化、腐蚀性物质接触，以免产品变质，运输时注意小心轻放，防止包装袋破损。

    maleic anhydride should be stored in a dry and ventilated warehouse with fire, moisture, rain and sun protection. The storage period is three months to one year. In the process of storage and transportation, do not mix with acid and alkali, avoid contact with oxidation and corrosive substances, so as to avoid deterioration of products. Pay attention to handle with care during transportation to prevent damage of packaging bags.

顺酐属低毒类。在工业使用中应严格防止污染皮肤和眼睛，加强通风。尽量避免呼吸道吸入。

Maleic anhydride is a kind of low toxicity. In industrial use, it is necessary to strictly prevent pollution of skin and eyes and strengthen ventilation. Try to avoid respiratory inhalation.