1.工业顺丁烯二酸酐产品包装使用编织袋包装，内衬聚乙烯塑料袋，袋口用绳扎紧，每个包装净重25kg或50kg，包装外面都有注册商标。
1. Industrial maleic anhydride products are packed in woven bags, lined with polyethylene plastic bags, and the bag mouth is fastened with ropes. The net weight of each package is 25kg or 50kg. There are registered trademarks on the outside of the package.
2.每批产品应附合格证，注明制造厂名、批号、级别和净重。
2. Each batch of products shall be attached with a certificate indicating the manufacturer's name, batch number, grade and net weight.
3.工业顺丁烯二酸酐贮存于干燥通风的库房内，防火、防潮、防雨淋日晒，自出厂之日起，贮存期为三个月。
3. Industrial maleic anhydride is stored in a dry and ventilated warehouse, which is fireproof, moisture-proof, rain-proof and sun-proof. The storage period is three months from the date of delivery.
4.在贮存和运输时勿与酸、碱混放或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。
4. During storage and transportation, do not mix with acid and alkali or contact with oxidizing and corrosive substances to avoid deterioration of products. Pay attention to handling with care during transportation to prevent damage of packaging bags.
四、产品的用途
4、 Purpose of the product
顺酐是重要的基本有机化工原料之一，它的发展和已成为仅次于苯酐和醋酐的第三大类酸酐产品，也是国民经济发展中不可缺少的化工产品。主要用途有:塑料工业用于制造增塑剂，造纸工业用于制造纸张处理剂;合成树脂工业用于制造不饱和聚酯树脂、醇酸树脂等，涂料工业用于制造绝缘漆、白磁漆、烘漆等，农业工业用于制造农药马拉松和低毒农药4049等;医药工业用于制造长效磺胺药;油脂工业用于作脂肪、油的防腐剂;有机工业用于制造富马酸及四氢呋喃等;分析化学工业用作化学试剂。.
Maleic anhydride is one of the important basic organic chemical raw materials. Its development and production has become the third largest category of anhydride products after phthalic anhydride and acetic anhydride. It is also an indispensable chemical product in the development of the national economy. The main uses are: the plastic industry is used to manufacture plasticizers, and the paper industry is used to manufacture paper processing agents; The synthetic resin industry is used to manufacture unsaturated polyester resin, alkyd resin, etc., the paint industry is used to manufacture insulating paint, white enamel, baking paint, etc., and the agricultural industry is used to manufacture pesticide marathon, efficient and low-toxic pesticide 4049, etc; The pharmaceutical industry is used to manufacture long-acting sulfa drugs; The oil industry is used as a preservative for fats and oils; Organic industry is used to manufacture fumaric acid and tetrahydrofuran; The analytical chemical industry is used as a chemical reagent
顺酐是以苯和空气为原料，采用意大利催化剂( V20z) 。经固定床催化氧化，生成顺酐气体，经降温捕集约50%的粗酐，余气在洗涤塔内用水吸收成39%-46%顺酸溶液，顺酸溶液在精馏塔中用二甲苯作脱水剂进行恒沸脱水，脱去分子水和游离水，脱水后加入粗酐进行减压蒸馏，分离出二甲苯及其中杂质，精制后的液体顺酐经成型、刮片、包装制得成品顺酐。
Maleic anhydride is produced from benzene and air using Italian catalyst (V20z). After catalytic oxidation in a fixed bed, maleic anhydride gas is generated, and about 50% of the crude anhydride is captured by cooling. The remaining gas is absorbed into 39% - 46% maleic acid solution in the washing tower with water. The maleic acid solution is dehydrated by azeotropic distillation using xylene as a dehydrating agent in the distillation tower to remove molecular water and free water. After dehydration, crude anhydride is added for vacuum distillation, and xylene and impurities therein are separated. The refined liquid maleic anhydride is formed, scraped and packaged to produce finished maleic anhydride.
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