Maleic anhydride CAS: 108-31-6

okike

Ebe agbaze 51-56°C (ọkụ)

Ebe esi mmiri ọkụ 200°C (ọkụ)

Njupụta 1.48 Njupụta nnukwu 700-800kg/m3

Njupụta uzuoku 3.4 (vsair)

Nrụgide uzuoku 0.16mmHg (20°C)

Ndekọ Refractive 1.4688 (atụmatụ)

Ebe ọkụ 218°F

Maleic anhydride, nke a makwaara dị ka "maleic anhydride", bụ anhydride nke maleic acid. Ọ bụ ihe siri ike na-enweghị agba ma ọ bụ ọcha, nwere uto gbara ụka na okpomọkụ ụlọ, yana usoro molekul nke C4H2O3. Ibu molekul bụ 98.06. A na-enweta kristal dị ka agịga site na chloroform ma ọ bụ ether. Ebe ịgbaze 60℃, ebe esi mmiri 82℃ (1.Chemicalbook8665kPa), njupụta dị 1.31460. A na-agbaze na acetone, chloroform, ether, na-agbaze ntakịrị na petroleum ether. A na-agbaze na mmiri iji mepụta cis-butenedioic acid, gbazee na mmanya iji mepụta esters, ma nwee ike imeghachi omume na ngwakọta nwere njikọ abụọ iji mepụta njikọ diene. Ọ na-egbu egbu, na-akpasu akpụkpọ ahụ mucous iwe nke ukwuu.

Ojiji:

A na-eji ya eme ihe dị ka ihe e ji emepụta 1,4-butanediol, γ-butyrolactone, tetrahydrofuran, succinic acid, unsaturated polyester resin, alkyd resin, wdg. A na-ejikwa ya eme ihe na ọgwụ na ọgwụ nje.

Ụzọ mmepụta

Ụzọ kachasị esi emepụta maleic anhydride bụ benzene oxidation, butene oxidation na n-butane oxidation, mana benzene oxidation ka bụ ụzọ kachasị. 1. Usoro oxidation Benzene Benzene na-enweta mmeghachi omume oxidation n'ime akwa edobere n'okpuru ọrụ nke V-Mo-P usoro catalyst iji mepụta maleic anhydride, okpomọkụ mmeghachi omume ahụ dịkwa 365°C (akwa mmeghachi omume nwekwara ike iji akwa esi mmiri, mana oriri nke Chemicalbook dị elu). Mgbe ahụ, a na-etinye ya na mmiri iji mepụta maleic acid, mgbe ahụ a na-eme azeotropic dehydration na distillation, a na-enwetakwa ngwaahịa emechara site na ịkpụcha. 2. Usoro oxidation Butane (ma ọ bụ butene) A na-eme ka Butane (ma ọ bụ butene) dị ọcha site na ikuku ma ọ bụ oxygen n'okpuru ọrụ nke V-Mo catalyst iji mepụta maleic anhydride, okpomọkụ mmeghachi omume ahụ dịkwa 350-400°C. Mgbe ahụ, mmiri na-amịkọrọ ya, gbazee ya ma nụchaa ya iji nweta ngwaahịa emechara.

Ozi mkpọtụrụ

Eason Peng

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