I-Maleic anhydride CAS: 108-31-6

imvelo

Iphuzu lokuncibilika 51-56°C (ngokukhanya)

Iphuzu lokubila 200°C (elikhanyayo)

Ubuningi 1.48 Ubuningi 700-800kg/m3

Ubuningi bomusi 3.4 (vsair)

Umfutho womusi 0.16mmHg (20°C)

Inkomba yokubukeza 1.4688 (isilinganiso)

Iphoyinti lokuphazima 218°F

I-anhydride yama-Maleic, eyaziwa nangokuthi “i-anhydride yama-Maleic”, iyi-anhydride ye-asidi yama-Maleic. Iyi-solid engenambala noma emhlophe enokunambitheka okumuncu ekushiseni kwegumbi, enefomula yama-molecule engu-C4H2O3. Isisindo sama-molecule 98.06. Amakristalu anomumo wenaliti atholakala ku-chloroform noma i-ether. Iphuzu lokuncibilika 60℃, iphuzu lokubila 82℃ (1.Chemicalbook8665kPa), ubuningi obuhlobene 1.31460. Incibilika ku-acetone, i-chloroform, i-ether, incibilika kancane ku-ether ye-petroleum. Incibilika emanzini ukuze yakhe i-cis-butenedioic acid, incibilike ku-alcohol ukuze yakhe ama-esters, futhi ingasabela ngama-compounds aqukethe izibopho ezimbili ezihlanganisiwe ukuze yakhe i-diene synthesis. Inobuthi, iyacasula kakhulu ulwelwesi lwama-mucous.

Ukusetshenziswa:

Isetshenziswa njengezinto zokusetshenziswa ekukhiqizweni kwe-1,4-butanediol, i-γ-butyrolactone, i-tetrahydrofuran, i-succinic acid, i-unsaturated polyester resin, i-alkyd resin, njll. Iphinde isetshenziswe kwezokwelapha kanye nasezibulala-zinambuzane.

Izindlela zokukhiqiza

Izindlela eziyinhloko zokukhiqiza i-anhydride yama-maleic yi-benzene oxidation, i-butene oxidation kanye ne-n-butane oxidation, kodwa i-benzene oxidation iseyindlela eyinhloko. 1. Indlela ye-oxidation ye-benzene I-Benzene idlula ekusabeleni kwe-oxidation embhedeni ohleliwe ngaphansi kwesenzo se-V-Mo-P series catalyst ukukhiqiza i-maleic anhydride, kanti izinga lokushisa lokusabela lingu-365°C (umbhede wokusabela ungasebenzisa futhi umbhede obilisayo, kodwa ukusetshenziswa kwe-Chemicalbook kuphezulu). Bese imuncwa ngamanzi ukukhiqiza i-maleic acid, bese kuba nokuphelelwa amanzi emzimbeni kanye ne-distillation ye-azeotropic, bese umkhiqizo oqediwe utholakala ngokuklwebha. 2. Indlela ye-oxidation ye-butane (noma i-butene) I-Butane (noma i-butene) i-oxidation ngomoya noma i-oxygen ngaphansi kwesenzo se-V-Mo catalyst ukukhiqiza i-maleic anhydride, kanti izinga lokushisa lokusabela lingu-350-400°C. Bese imuncwa ngamanzi, incishiswe futhi ihlungwe ukuze kutholakale umkhiqizo oqediwe.

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