馬來酸酐又稱順丁烯二酸酐(MAH)，簡稱順酐，是順丁烯二酸的酸酐，室溫下為有酸味的無色或白色固體，分子式為C4H2O3。順丁烯二酸酐以前用苯的催化氧化制備，但由于的緣故，現(xiàn)在大多用正丁烷氧化法制取:2CH3CH2CH2CH3+7O2→2C2H2(CO)2O+8H2O
Maleic anhydride, also known as maleic anhydride (MAH), is the anhydride of maleic acid. It is a colorless or white solid with sour taste at room temperature, and the molecular formula is c4h2o3. Maleic anhydride was previously prepared by catalytic oxidation of benzene, but now it is mostly prepared by n-butane oxidation: 2ch3ch2ch2ch3 + 7o2 → 2c2h2 (CO) 2O + 8H2O
馬來酸酐又稱順丁烯二酸酐(MAH)，簡稱順酐，是順丁烯二酸的酸酐，室溫下為有酸味的無色或白色固體，分子式為C4H2O3。
Maleic anhydride, also known as maleic anhydride (MAH), is the anhydride of maleic acid. It is a colorless or white solid with sour taste at room temperature, and the molecular formula is c4h2o3.
順丁烯二酸酐以前用苯的催化氧化制備，但由于的緣故，現(xiàn)在大多用正丁烷氧化法制
取:2CH3CH2CH2CH3+7O2→2C2H2(CO)2O+8H2O
Maleic anhydride was previously prepared by catalytic oxidation of benzene, but now it is mostly prepared by n-butane oxidation: 2ch3ch2ch2ch3 + 7o2 → 2c2h2 (CO) 2O + 8H2O
順丁烯二酸酐可發(fā)生的反應(yīng)有:
The reactions of maleic anhydride include:
水解生成順丁烯二酸(cis-HO2CCH=CHCO2H)，1:1醇解生成單酯:cis-HO2CCH=CHCO2CH3;用作狄爾斯-阿爾德反應(yīng)中的親雙烯體;與低價(jià)金屬配位，配合物的例子如Pt(PPh3)2(MA)及Fe(CO)4(MA)。
Maleic acid (cis-ho2cch = chco2h) is produced by hydrolysis, and monoester is produced by 1:1 alcoholysis: cis-ho2cch = chco2ch3; Used as dienophile in Diels alder reaction; Examples of complexes coordinated with low valent metals are Pt (PPh3) 2 (MA) and Fe (CO) 4 (MA).
下面我們來看看馬來酸酐的用途
Let's look at the use of maleic anhydride
1.用作1,4-丁二醇、γ-丁內(nèi)酯、琥珀酸、不飽和聚酯樹脂、醇酸樹脂等的原料，也用于醫(yī)藥和農(nóng)藥。
1. Used to produce 1,4-butanediol γ- Butyrolactone, succinic acid, unsaturated polyester resin, alkyd resin and other raw materials are also used in medicine and pesticides.
2.金屬選礦中充當(dāng)捕收劑
2. Act as collector in metal beneficiation
3.用于有機(jī)合成，也用作合成纖維中間體
3. It is used in organic synthesis and also as an intermediate of synthetic fiber
4.馬來酸酐是一種重要的不飽和有機(jī)酸酐基本原料，在農(nóng)藥上用于合成有機(jī)磷殺蟲劑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、劑、克菌丹的中間體，此外，還用于不飽和聚酯樹脂、油墨助劑、造紙助劑、涂料以及醫(yī)藥工業(yè)、食品工業(yè)等。
4. Maleic anhydride is an important basic raw material of unsaturated organic anhydride. In pesticide production, maleic anhydride is used to synthesize diethyl maleate, the intermediate of pyridazinon, 1-phenyl-3,6-dihydroxypyridazine, and the intermediate of pyrethroid insecticide fenpropathrin, fungicide and captan. In addition, it is also used to produce unsaturated polyester resin Ink additives, papermaking additives, coatings, pharmaceutical industry, food industry, etc.
5.主要用于不飽和聚酯樹脂、醇酸樹脂、農(nóng)藥、低毒農(nóng)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。也是油墨助劑、造紙助劑、增塑劑和酒石酸、富馬酸等的有機(jī)化工原料。
5. It is mainly used to produce unsaturated polyester resin, alkyd resin, pesticide, low toxic pesticide 4049 and long-acting iodamine. It is also a coating, maleic rosin, polymaleic anhydride, 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, etc.
6.馬來酸酐(108-31-6)是一種常用的重要基本有機(jī)化工原料。是世界上僅次于醋酐和苯酐的第三大酸酐原料。其下游產(chǎn)品有著相當(dāng)廣泛的開發(fā)和應(yīng)用前景。主要用于合成不飽和聚酯樹酯，它是制造汽車部件、船舶、耐腐蝕性化工設(shè)備和日用品的原料。馬來酸酐(108-31-6)也是潤滑油的添加劑、涂料、農(nóng)藥、富馬酸、共聚物、食品添加劑等重要中間體。其加氫衍生物有琥珀酸酐、1.4-丁二醇、r-J內(nèi)酯。
6. Maleic anhydride (108-31-6) is a common and important basic organic chemical raw material. It is the third largest anhydride raw material in the world after acetic anhydride and phthalic anhydride. Its downstream products have a wide range of development and application prospects. It is mainly used to synthesize unsaturated polyester resin. It is the raw material for manufacturing automobile parts, ships, corrosion-resistant chemical equipment and daily necessities. Maleic anhydride (108-31-6) is also an important intermediate for the production of lubricating oil additives, coatings, pesticides, fumaric acid, copolymers, food additives and so on. Its hydrogenation derivatives include succinic anhydride, 1.4-butanediol and R-J lactone.
