Maleic anhydride is a common and important basic organic chemical raw material. It 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, 1,4-butanediol (BOD) can be produced from maleic anhydride γ- Butyrolactone (GBL), tetrahydrofuran (THF), maleic acid, fumaric acid and tetrahydroanhydride are a series of fine chemical products with wide applications. They are widely used in the fields of pesticides, medicine, coatings, inks, lubricating oil additives, papermaking chemicals, textile finishing agents, food additives and surfactants.

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。

The process route of industrial production of maleic anhydride in the world is mainly n-butane oxidation, followed by benzene oxidation. Benzene oxidation is mainly used in China.

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：

Basic physical and chemical properties of maleic anhydride:

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 white orthorhombic acicular crystal with molecular formula c4h203, molecular weight 98.06, melting point 52.8 ℃, boiling point 202 ℃, relative density 1.314, flash point 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, irritating to people, and will burn human skin.

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 belongs to low toxicity. In industrial use, strictly prevent skin and eyes pollution and strengthen ventilation. Try to avoid respiratory inhalation