順酐是一種常用的重要基本有機化工原料,是世界上僅次于醋酐和苯酐的第三大酸酐原料。
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.
順酐主要用于不飽和聚酯樹脂（UPR）、醇酸樹脂。此外，以順酐為原料還可以1，4-丁二醇（BOD）、γ-丁內酯（GBL）、四氫呋喃（THF）、馬來酸、富馬酸和四氫酸酐等一系列用途廣泛的精細化工產品，在農藥、醫藥、涂料、油墨、潤滑油添加劑、造紙化學品、紡織品整理劑、食品添加劑以及表面活性劑等領域具有廣泛的應用。
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.
上工業化順酐的工藝路線主要為正丁烷法氧化法，其次為苯氧化法，我國主要采用苯氧化法。
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.
近年來，我國順酐的表觀消費量不斷增加。無論是我國順酐的技術，還是能力都得到了很大的發展，但是與國外相比還存在一些問題。
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.
順酐基本理化性質：
Basic physical and chemical properties of maleic anhydride:
順丁烯二酸酐系白色斜方形針狀結晶，分子式C4H203，分子量98.06，熔點52.8℃，沸點202℃，相對密度1.314，閃點103℃，易升華。順酐易溶于水、醇和酯，微溶于四氯化碳和粗汽油。順酐的粉塵和蒸汽均易燃易爆，對人有刺激，而且會燒傷人體皮膚。
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.
順酐屬低毒類。在工業使用中應嚴格防止污染皮膚和眼睛，加強通風。盡量避免呼吸道吸入
Maleic anhydride belongs to low toxicity. In industrial use, strictly prevent skin and eyes pollution and strengthen ventilation. Try to avoid respiratory inhalation
