1.工業(yè)順丁烯二酸酐產(chǎn)品包裝使用編織袋包裝，內襯聚乙烯塑料袋，袋口用繩扎緊，每個包裝凈重25kg或50kg，包裝外面都有注冊商標。
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.每批產(chǎn)品應附合格證，注明制造廠名、批號、級別和凈重。
2. Each batch of products shall be attached with a certificate indicating the manufacturer's name, batch number, grade and net weight.
3.工業(yè)順丁烯二酸酐貯存于干燥通風的庫房內，防火、防潮、防雨淋日曬，自出廠之日起，貯存期為三個月。
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.在貯存和運輸時勿與酸、堿混放或與氧化腐蝕性物質接觸，以免產(chǎn)品變質，運輸時注意小心輕放，防止包裝袋破損。
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、產(chǎn)品的用途
4、 Purpose of the product
順酐是重要的基本有機化工原料之一，它的發(fā)展和已成為僅次于苯酐和醋酐的第三大類酸酐產(chǎn)品，也是國民經(jīng)濟發(fā)展中不可缺少的化工產(chǎn)品。主要用途有:塑料工業(yè)用于制造增塑劑，造紙工業(yè)用于制造紙張?zhí)幚韯?合成樹脂工業(yè)用于制造不飽和聚酯樹脂、醇酸樹脂等，涂料工業(yè)用于制造絕緣漆、白磁漆、烘漆等，農(nóng)業(yè)工業(yè)用于制造農(nóng)藥馬拉松和低毒農(nóng)藥4049等;醫(yī)藥工業(yè)用于制造長效磺胺藥;油脂工業(yè)用于作脂肪、油的防腐劑;有機工業(yè)用于制造富馬酸及四氫呋喃等;分析化學工業(yè)用作化學試劑。.
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
順酐是以苯和空氣為原料，采用意大利催化劑( V20z) 。經(jīng)固定床催化氧化，生成順酐氣體，經(jīng)降溫捕集約50%的粗酐，余氣在洗滌塔內用水吸收成39%-46%順酸溶液，順酸溶液在精餾塔中用二甲苯作脫水劑進行恒沸脫水，脫去分子水和游離水，脫水后加入粗酐進行減壓蒸餾，分離出二甲苯及其中雜質，精制后的液體順酐經(jīng)成型、刮片、包裝制得成品順酐。
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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