I-Maleic anhydride CAS: 108-31-6

indalo

Iqondo lokunyibilika 51-56°C (elikhanyayo)

Iqondo lokubila 200°C (elikhanyayo)

Uxinano 1.48 Uxinano olukhulu 700-800kg/m3

Uxinano lomphunga 3.4 (vsair)

Uxinzelelo lomphunga 0.16mmHg (20°C)

Isalathisi sokubonisa ukukhanya 1.4688 (uqikelelo)

Incopho yokutshaza 218°F

I-anhydride yeMaleic, ekwaziwa ngokuba yi-"maleic anhydride", yi-anhydride ye-maleic acid. Yinto eqinileyo engenambala okanye emhlophe enencasa emuncu kubushushu begumbi, enefomula yemolekyuli ye-C4H2O3. Ubunzima beMolekyuli yi-98.06. Iikristale ezimile okwenaliti zifunyanwa kwi-chloroform okanye kwi-ether. Iqondo lokunyibilika yi-60℃, iqondo lokubila yi-82℃ (1.Chemicalbook8665kPa), uxinano oluhambelanayo yi-1.31460. Inyibilika kwi-acetone, i-chloroform, i-ether, inyibilika kancinci kwi-petroleum ether. Inyibilika emanzini ukwenza i-cis-butenedioic acid, inyibilika kwi-alcohol ukwenza ii-esters, kwaye inokusabela kwiikhompawundi ezineebhondi ezimbini ezidityanisiweyo ukwenza i-diene synthesis. Inetyhefu, iyacaphukisa kakhulu ii-mucous membranes.

Ukusetyenziswa:

Isetyenziswa njengezinto zokwenza imveliso ye-1,4-butanediol, i-γ-butyrolactone, i-tetrahydrofuran, i-succinic acid, i-unsaturated polyester resin, i-alkyd resin, njl. Ikwasetyenziswa kumayeza nakwizibulali-zinambuzane.

Iindlela zemveliso

Iindlela eziphambili zokuvelisa i-anhydride ye-maleic yi-benzene oxidation, i-butene oxidation kunye ne-n-butane oxidation, kodwa i-benzene oxidation iseyeyona ndlela iphambili. 1. Indlela ye-oxidation ye-benzene I-Benzene idlula kwi-oxidation reaction kwi-fixed bed phantsi kwesenzo se-V-Mo-P series catalyst ukuvelisa i-maleic anhydride, kwaye ubushushu bokusabela buyi-365°C (i-reaction bed ingasebenzisa ne-billing bed, kodwa ukusetyenziswa kwe-Chemicalbook kuphezulu). Emva koko ifunxwa ngamanzi ukuvelisa i-maleic acid, kwaye emva koko i-azeotropic dehydration kunye ne-distillation zenziwa, kwaye imveliso egqityiweyo ifunyanwa ngokukrazula. 2. Indlela ye-butane oxidation (okanye i-butene) I-Butane (okanye i-butene) ifunxwa ngumoya okanye i-oksijini phantsi kwesenzo se-V-Mo catalyst ukuvelisa i-maleic anhydride, kwaye ubushushu bokusabela buyi-350-400°C. Emva koko ifunxwa ngamanzi, ikhutshwe kwaye icocwe ukuze kufunyanwe imveliso egqityiweyo.

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