Ophthalic Acid
Cov qauv tsim qauv
Lub npe: Ophthalic acid
Lwm lub npe: 2-methyl benzoic acid;O-toluene acid
Cov mis mos molecular: C8H8O2
Molecular Luj: 136.15
Numbering System
CAS Nr .: 118-90-1
PIB: 204-284-9
HS code: 29163900
Cov ntaub ntawv lub cev
Cov tsos mob: dawb flammable prismatic crystals los yog koob siv lead ua.
Cov ntsiab lus:≥99.0% (kua chromatography)
Melting point: 103°C
Kub taw tes: 258-259°C (lit.)
Qhov ceev: 1.062 g / mL ntawm 25°C (lit.)
Refractive Index: 1.512
Cov ntsiab lus tseem ceeb: 148°C
Solubility: Me ntsis soluble hauv dej, yooj yim soluble hauv ethanol, ether thiab chloroform.
Txoj kev tsim khoom
1. Tau los ntawm catalytic oxidation ntawm o-xylene.Siv o-xylene ua raw khoom thiab cobalt naphthenate ua catalyst, ntawm qhov kub ntawm 120 ° C thiab lub siab ntawm 0.245 MPa, o-xylene tsis tu ncua nkag mus rau oxidation ntauwd rau huab cua oxidation, thiab cov kua oxidation nkag mus rau hauv Chemicalbook stripping ntauwd. rau cov concentration, crystallization, thiab centrifugation.Tau cov khoom tiav.Cov cawv niam yog distilled kom rov qab o-xylene thiab ib feem ntawm o-toluic acid, thiab tom qab ntawd tso tawm cov seem.Cov txiaj ntsig yog 74%.Txhua tuj ntawm cov khoom siv 1,300 kg ntawm o-xylene (95%).
2. Txoj kev npaj yog tias o-xylene yog oxidized tsis tu ncua nrog huab cua nyob rau hauv lub xub ntiag ntawm ib tug cobalt naphthenate catalyst ntawm ib tug tshuaj tiv thaiv kub ntawm 120-125 ° C thiab ib tug siab ntawm 196-392 kPa nyob rau hauv ib tug oxidation ntauwd kom tau ib tug tiav lawm. khoom.
Khoom siv
Kev siv feem ntau yog siv rau hauv kev sib txuas ntawm cov tshuaj tua kab, tshuaj thiab cov khoom siv tshuaj organic.Tam sim no, nws yog cov khoom siv tseem ceeb rau kev tsim cov tshuaj tua kab mob.Siv o-methylbenzoic acid yog cov fungicide pyrrolidone, fenoxystrobin, trifloxystrobin thiab herbicide benzyl Cov intermediates ntawm sulfuron-methyl yuav siv tau raws li organic synthesis intermediates xws li tshuaj tua kab kab mob bactericide phosphoramide, naj hoom, vinyl chloride polymerization initiator MBPO, tus tsim tawm zaj duab xis thiab lwm yam.
