Maleic anhydride CAS: 108-31-6

yanayi

Wurin narkewa 51-56°C (haske)

Tafasawar zafin jiki 200°C (haske)

Yawan yawa 1.48 Yawan yawa 700-800kg/m3

Yawan tururi 3.4 (vsair)

Matsin tururi 0.16mmHg (20°C)

Ma'aunin haske 1.4688 (kimantawa)

Wurin walƙiya 218°F

Maleic anhydride, wanda aka fi sani da "maleic anhydride", shine anhydride na maleic acid. Yana da tauri mara launi ko fari mai ɗanɗano mai tsami a zafin ɗaki, tare da dabarar kwayoyin halitta ta C4H2O3. Nauyin kwayoyin halitta 98.06. Ana samun lu'ulu'u masu siffar allura daga chloroform ko ether. Wurin narkewa 60℃, wurin tafasa 82℃ (1.Chemicalbook8665kPa), yawan dangi 1.31460. Yana narkewa a cikin acetone, chloroform, ether, yana narkewa kaɗan a cikin petroleum ether. Ana narkar da shi a cikin ruwa don samar da cis-butenedioic acid, wanda aka narkar a cikin barasa don samar da esters, kuma yana iya amsawa da mahaɗan da ke ɗauke da haɗin gwiwa biyu don samar da haɗin diene. Mai guba, yana da matuƙar haushi ga membranes na mucous.

Amfani:

Ana amfani da shi azaman kayan aiki don samar da 1,4-butanediol, γ-butyrolactone, tetrahydrofuran, succinic acid, unsaturated polyester resin, alkyd resin, da sauransu. Hakanan ana amfani da shi a magani da magungunan kashe kwari.

Hanyoyin samarwa

Manyan hanyoyin samar da maleic anhydride sune oxidation na benzene, oxidation na butene da oxidation na n-butane, amma oxidation na benzene har yanzu shine babban hanyar. 1. Hanyar oxidation na Benzene Benzene yana shan oxidation a cikin gado mai tsayayye a ƙarƙashin aikin V-Mo-P series catalyst don samar da maleic anhydride, kuma zafin amsawar shine 365°C (gadon amsawar kuma yana iya amfani da gadon tafasa, amma shan Chemicalbook yana da yawa). Sannan ana sha da ruwa don samar da maleic acid, sannan ana gudanar da bushewar azeotropic da distillation, kuma ana samun samfurin da aka gama ta hanyar gogewa. 2. Hanyar oxidation na Butane (ko butene) Ana oxidize Butane (ko butene) ta iska ko iskar oxygen a ƙarƙashin aikin V-Mo catalyst don samar da maleic anhydride, kuma zafin amsawar shine 350-400°C. Sannan ana sha da ruwa, a bushe kuma a tace don samun samfurin da aka gama.

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