化学性质
chemical property
1.避免接触潮湿空气。避免与强氧化剂、强还原剂、强酸、强碱、碱金属、水接触。
1. Avoid contact with damp air. Avoid contact with strong oxidizing agents, strong reducing agents, strong acids, strong alkalis, alkali metals, and water.
斜方晶系无色针状或片状结晶体。溶于水生成顺丁烯二酸。溶于乙醇并生成酯。
The rhombic crystal system is a colorless needle shaped or sheet shaped crystal. Dissolve in water to form maleic acid. Dissolve in ethanol and generate esters.
溶于乙醇、乙醚等多种有机溶剂，难溶于石油醚和四氯化碳。与热水作用生成顺丁烯二酸。易于烯类单体进行共聚反应；也可进行均聚。与二元醇反应生成线型不饱和聚酯，与三氧化硫反应生成磺化顺丁烯二酸酐。可燃。有毒，溅及皮肤时要用大量清水冲洗。生产设备要密闭，操作人员要穿戴好防护用具。
Soluble in ethanol, ether and other organic solvents, insoluble in Petroleum ether and carbon tetrachloride. React with hot water to form maleic acid. Easy to copolymerize with olefinic monomers; Homopolymerization can also be carried out. It reacts with Diol to generate linear unsaturated polyester, and reacts with Sulfur trioxide to generate sulfonated Maleic anhydride. Flammable. Toxic, when splashed on the skin, rinse with plenty of water. Production equipment should be sealed, and operators should wear protective equipment.
2.该品有毒。其毒性比顺酸大，能刺激皮肤及黏膜。当人体接触高温液体时，其刺激性更为严重，能造成皮肤灼烧至伤，结膜、角膜红肿，严重时导致视力减退甚至失明。对大鼠经服LD50为400mg/kg。小鼠经口LD5060~465mg/kg。在空气中高容许浓度0.25*10-6。当溅及皮肤时要用大量清水冲洗。生产设备要密闭，操作人员要穿戴好防护用具。
2. The product is toxic. Its toxicity is greater than that of cis acid and can stimulate the skin and mucous membranes. When the human body comes into contact with high-temperature liquids, their irritation is more severe, which can cause skin burns to wounds, conjunctiva and cornea redness and swelling, and in severe cases, lead to decreased vision or even blindness. The LD50 administered to rats is 400mg/kg. Oral LD5060-465mg/kg in mice. High allowable concentration in the air of 0.25 * 10-6. When splashing onto the skin, rinse with plenty of water. Production equipment should be sealed, and operators should wear protective equipment.
3.存在于烟气中。
3. Exists in flue gas.
4.强烈的刺激性，引起烧伤，吸入可引起肺水肿。易被雾化。加热到150℃以上放出乙酸。溶液加热到100℃发生分子断链。
4. Strong irritation, causing burns, and inhalation can cause Pulmonary edema. Easily atomized. Heat to above 150 ℃ to release acetic acid. Heating the solution to 100 ℃ results in molecular chain breakage.
Next, let's talk about the use of maleic anhydride manufacturers:
1.用作生产1,4-丁二醇、γ-丁内酯、四氢呋喃、琥珀酸、不饱和聚酯树脂、醇酸树脂等的原料，也用于医药和农药。
1. Used for producing 1,4-butanediol γ- Raw materials such as butyrolactone, tetrahydrofuran, succinic acid, unsaturated polyester resin, alkyd resin, etc., are also used in pharmaceuticals and pesticides.
2.金属选矿中充当捕收剂
2. Act as a collector in metal beneficiation
3.用于有机合成，也用作合成纤维中间体
3. It is used for organic synthesis and also as an intermediate of Synthetic fiber
4.顺酐是一种重要的不饱和有酸酐的酐基本原料，在农药生产上用于合成有机磷杀虫剂马拉硫磷的中间体顺丁烯二酸二乙酯、哒嗪硫磷的中间体1-苯基-3，6-二羟基哒嗪，以及拟除虫菊酯杀虫剂胺菊酯、杀菌剂、克菌丹的中间体，此外，还用于生产不饱和聚酯树脂、油墨助剂、造纸助剂、涂料以及医药工业、食品工业等。
4. Maleic anhydride is an important basic raw material of unsaturated anhydrides. It is used in the production of pesticides to synthesize the intermediate diethyl maleate of organic phosphorus pesticide Malathion, the intermediate 1-phenyl-3,6-dihydroxypyridazine of pyridazinon, and the intermediate of Pyrethrin pesticide Tetramethrin, fungicide, and captan. In addition, it is also used in the production of unsaturated polyester resin, ink additives, papermaking additives Coatings, pharmaceutical industry, food industry, etc.
5.主要用于生产不饱和聚酯树脂、醇酸树脂、农药马拉硫磷、低毒农药4049、长效碘胺的原料。也是涂料、马来松香、聚马来酐、顺酐-苯乙烯共聚物。也是生产油墨助剂、造纸助剂、增塑剂和酒石酸、富马酸、四氢呋喃等的有机化工原料。
5. It is mainly used as raw materials for the production of unsaturated polyester resin, alkyd resin, pesticide Malathion, efficient and low toxic pesticide 4049, and long-acting iodamine. It is also a coating, maleic rosin, polymaleic anhydride, and maleic anhydride styrene copolymer. It is also an organic chemical raw material for the production of ink additives, papermaking additives, plasticizers, Tartaric acid, fumaric acid, tetrahydrofuran, etc.
Maleic anhydride is a commonly used and important basic organic chemical raw material, and its downstream products have a wide range of development and application prospects. If you have any needs regarding this, please contact us for consultation http://chaonvhui.com Come on!
