Txiv neej anhydride CAS: 108-31-6

xwm

Melting point 51-56 ° C (lit.)

Kub taw tes 200 ° C (lit.)

Qhov Ceev 1.48 Qhov Ceev Ntau 700-800kg/m3

Qhov ceev ntawm cov pa roj 3.4 (vsair)

Qhov siab ntawm cov pa dej 0.16mmHg (20°C)

Refractive index 1.4688 (kwv yees)

Qhov kub hnyiab 218°F

Maleic anhydride, tseem hu ua "maleic anhydride", yog anhydride ntawm maleic acid. Nws yog ib qho khoom tsis muaj xim lossis dawb nrog saj qaub ntawm chav tsev kub, nrog rau cov mis molecular ntawm C4H2O3. Molecular hnyav 98.06. Cov siv lead ua zoo li koob tau los ntawm chloroform lossis ether. Melting point 60 ℃, boiling point 82 ℃ (1.Chemicalbook 8665kPa), qhov ceev txheeb ze 1.31460. Yaj hauv acetone, chloroform, ether, me ntsis yaj hauv roj av ether. Yaj hauv dej los ua cis-butenedioic acid, yaj hauv cawv los ua esters, thiab tuaj yeem cuam tshuam nrog cov tshuaj uas muaj cov khoom sib txuas ua ke los ua diene synthesis. Lom, khaus heev rau cov ntaub so ntswg.

Siv:

Siv ua raw khoom rau kev tsim cov 1,4-butanediol, γ-butyrolactone, tetrahydrofuran, succinic acid, unsaturated polyester resin, alkyd resin, thiab lwm yam. Nws kuj siv rau hauv tshuaj thiab tshuaj tua kab.

Cov txheej txheem tsim khoom

Cov txheej txheem tseem ceeb ntawm maleic anhydride yog benzene oxidation, butene oxidation thiab n-butane oxidation, tab sis benzene oxidation tseem yog txoj kev tseem ceeb. 1. Txoj kev oxidation Benzene Benzene dhau los ntawm kev tshuaj tiv thaiv oxidation hauv lub txaj ruaj khov nyob rau hauv qhov kev ua ntawm V-Mo-P series catalyst los tsim maleic anhydride, thiab qhov kub ntawm cov tshuaj tiv thaiv yog 365 ° C (lub txaj tiv thaiv kuj tuaj yeem siv lub txaj npau, tab sis kev siv Chemicalbook siab). Tom qab ntawd nws raug nqus nrog dej los tsim maleic acid, thiab tom qab ntawd azeotropic dehydration thiab distillation raug nqa tawm, thiab cov khoom tiav lawm tau txais los ntawm kev khawb. 2. Butane (lossis butene) txoj kev oxidation Butane (lossis butene) yog oxidized los ntawm huab cua lossis oxygen nyob rau hauv qhov kev ua ntawm V-Mo catalyst los tsim maleic anhydride, thiab qhov kub ntawm cov tshuaj tiv thaiv yog 350-400 ° C. Tom qab ntawd nws raug nqus los ntawm dej, qhuav thiab ua kom huv si kom tau txais cov khoom tiav lawm.

Cov ntaub ntawv tiv tauj

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