Maleic anhydride is mainly used as raw material of glass fiber reinforced plastics industry, unsaturated polyester resin (UPR); 1,4-butanediol (BDO), tetrahydrofuran (THF) and hydrogen peroxide in hydrogenation products γ- Butyrolactone (GBL); It is also used in coatings, lubricant additives, pesticides, tartaric acid, succinic acid and anhydride, tetrahydrophthalic anhydride, modified rosin, etc.

不饱和聚酯树脂（UPR）：是热固型树脂的主要品种之一，由于其优良的机械性能、电性能和耐化学腐蚀性能，且加工工艺简便，因此应用广泛。目前可以经营400余个牌号的UPR，主要品种包括邻苯型、间苯型、对苯型、双酚A型等，按用途和功能分类包括通用树脂、耐化学品树脂、阻燃树脂、浇注树脂、柔性树脂、人造大理石、BMC与DMC树脂、装饰类树脂和特种树脂等。的UPR市场中，增强类（玻璃钢用）树脂比例只占40％，而用于非增强类树脂的比例高达60％，在非增强类树脂中工艺树脂占34％，纽扣树脂占24％，人造大理石占19％。

Unsaturated polyester resin (UPR): is one of the main varieties of thermosetting resin, because of its excellent mechanical properties, electrical properties and chemical corrosion resistance, and simple processing technology, so it is widely used. At present, China can operate more than 400 brands of UPR, the main varieties include o-benzene, m-benzene, p-benzene, bisphenol A, etc., according to the use and function classification, including general resin, chemical resistant resin, flame retardant resin, pouring resin, flexible resin, artificial marble, BMC and DMC resin, decorative resin and special resin, etc. In China's UPR market, the proportion of reinforced (FRP) resin only accounts for 40%, while the proportion of non reinforced resin is as high as 60%. Among the non reinforced resins, process resin accounts for 34%, button resin 24%, and artificial marble 19%.

UPR行业一直都是顺酐主要的消费领域，通常占顺酐总消费量的40％~50％，而由于顺酐下游产品用途相对较少，其应用在UPR行业的比例更是高达70％以上。据报道，2003年UPR产量已超过72万吨，消费量突破85万吨，已成为世界大的UPR消费国。近几年，UPR行业一直保持高速增长，平均年增长幅度达到27.6％，这极大地激励和支撑了顺酐行业的发展。

UPR industry has always been the main consumption field of maleic anhydride, usually accounting for 40% ~ 50% of the total consumption of maleic anhydride. However, due to the relatively small use of downstream products of maleic anhydride in China, the proportion of its application in UPR industry is as high as 70%. It is reported that in 2003, China's UPR output has exceeded 720000 tons, and its consumption has exceeded 850000 tons, becoming the world's largest UPR consumer. In recent years, China's UPR industry has maintained rapid growth, with an average annual growth rate of 27.6%, which greatly encouraged and supported the development of China's maleic anhydride industry.

在一般牌号的UPR经营原料中，顺酐所占比例为14％～17％。据预测，2007～2008年间全国UPR产量将达到110万吨/年，以后将在110万吨/年上下波动，到2009年将消费顺酐约22万吨/年。

Maleic anhydride accounts for 14% - 17% of UPR raw materials. It is predicted that the national UPR production will reach 1.1 million tons / year from 2007 to 2008, and will fluctuate in the next 1.1 million tons / year, and the consumption of maleic anhydride will be about 220000 tons / year by 2009.

加氢类产品：顺酐在加氢类产品（包括BDO、THF和GBL等）中的应用，特别是在新型热塑性工程塑料聚对苯二甲酸丁二醇酯（PBT）和作为氨纶原料的聚四亚甲基醚二醇（PTMEG）中的应用，是过去10年间乃今后较长一段时间内，能够大幅拉动全世界顺酐产品迅速增长的主要因素。

Hydrogenation products: the application of maleic anhydride in hydrogenation products (including BDO, THF and GBL, etc.), especially in new thermoplastic engineering plastics polybutylene terephthalate (PBT) and polytetramethylene ether glycol (PTMEG) as raw material of spandex, is the focus in the past 10 years and even for a long time in the future, The main factors that can greatly promote the rapid growth of maleic anhydride products in the world.