化學性質
chemical property
1.避免接觸潮濕空氣。避免與強氧化劑、強還原劑、強酸、強堿、堿金屬、水接觸。
1. Avoid contact with damp air. Avoid contact with strong oxidizing agents, strong reducing agents, strong acids, strong alkalis, alkali metals, and water.
斜方晶系無色針狀或片狀結晶體。溶于水生成順丁烯二酸。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、乙醚等多種有機溶劑，難溶于石油醚和四氯化碳。與熱水作用生成順丁烯二酸。易于烯類單體進行共聚反應；也可進行均聚。與二元醇反應生成線型不飽和聚酯，與三氧化硫反應生成磺化順丁烯二酸酐。可燃。有毒，濺及皮膚時要用大量清水沖洗。生產設備要密閉，操作人員要穿戴好防護用具。
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.該品有毒。其毒性比順酸大，能刺激皮膚及黏膜。當人體接觸高溫液體時，其刺激性更為嚴重，能造成皮膚灼燒至傷，結膜、角膜紅腫，嚴重時導致視力減退甚至失明。對大鼠經服LD50為400mg/kg。小鼠經口LD5060~465mg/kg。在空氣中高容許濃度0.25*10-6。當濺及皮膚時要用大量清水沖洗。生產設備要密閉，操作人員要穿戴好防護用具。
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.存在于煙氣中。
3. Exists in flue gas.
4.強烈的刺激性，引起燒傷，吸入可引起肺水腫。易被霧化。加熱到150℃以上放出乙酸。溶液加熱到100℃發生分子斷鏈。
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.用作生產1,4-丁二醇、γ-丁內酯、四氫呋喃、琥珀酸、不飽和聚酯樹脂、醇酸樹脂等的原料，也用于醫藥和農藥。
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.金屬選礦中充當捕收劑
2. Act as a collector in metal beneficiation
3.用于有機合成，也用作合成纖維中間體
3. It is used for organic synthesis and also as an intermediate of Synthetic fiber
4.順酐是一種重要的不飽和有酸酐的酐基本原料，在農藥生產上用于合成有機磷殺蟲劑馬拉硫磷的中間體順丁烯二酸二乙酯、噠嗪硫磷的中間體1-苯基-3，6-二羥基噠嗪，以及擬除蟲菊酯殺蟲劑胺菊酯、殺菌劑、克菌丹的中間體，此外，還用于生產不飽和聚酯樹脂、油墨助劑、造紙助劑、涂料以及醫藥工業、食品工業等。
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.主要用于生產不飽和聚酯樹脂、醇酸樹脂、農藥馬拉硫磷、低毒農藥4049、長效碘胺的原料。也是涂料、馬來松香、聚馬來酐、順酐-苯乙烯共聚物。也是生產油墨助劑、造紙助劑、增塑劑和酒石酸、富馬酸、四氫呋喃等的有機化工原料。
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://www.724ad.com Come on!
