P-toluic Acid

Fa'amatalaga Puupuu:

E saunia e le catalytic oxidation o le p-xylene ma le ea.A faʻaaogaina le auala faʻamalosi ea, e mafai ona faʻaopopo le xylene ma le cobalt naphthenate i totonu o le fagu tali, ma faʻafeiloaʻi le ea pe a faʻamafanafana i le 90 ℃.Ole vevela ole tali e pulea ile 110-115 ℃ mo le tusa ma le 24 itula, ma e tusa ma le 5% o le p-xylene ua liua ile p-methylbenzoic acid.


Fa'amatalaga Oloa

Faailoga o oloa

Fua fa'atatau

6

Igoa vaila'au: P-toluic Acid

Isi igoa: 4-methylbenzoic acid

fua mole: C8H8O2

mamafa mole: 136.15

Fa'ailoga numera:

CAS: 99-94-5

EINECS : 202-803-3

HS CODE: 29163900

Fa'amatalaga Fa'aletino

Fa'aaliga: pa'epa'e i le pa'u tioata samasama samasama

Mama: ≥99.0%(HPLC

Liu liusuavai: 179-182°C

Mea fa'apuna: 274-275°C

Suavai soluble: <0.1 g/100 mL ile 19°C

Itu ole moli: 124.7°C

Ausa malosi: 0.00248mmHg ile 25°C

Solubility: faigofie ona solu i le methanol, ethanol, eter, e le mafai ona solu i le vai vevela.

Metotia Gaosiga

1. E saunia e catalytic oxidation o p-xylene ma le ea.A faʻaaogaina le auala faʻamalosi ea, e mafai ona faʻaopopo le xylene ma le cobalt naphthenate i totonu o le fagu tali, ma faʻafeiloaʻi le ea pe a faʻamafanafana i le 90 ℃.Ole vevela ole tali e pulea ile 110-115 ℃ mo le tusa ma le 24 itula, ma e tusa ma le 5% o le p-xylene ua liua ile p-methylbenzoic acid.Fa'alili i le vevela o le potu, faamama, fufulu le keke faamama i le p-xylene, ma fa'agogo e maua ai le p-methylbenzoic acid.P-xylene ua toe fa'aaogaina.Ole fua ole 30-40%.A faʻaaogaina le auala faʻamaʻi faʻamaʻi, o le vevela o le tali o le 125 ℃, o le mamafa o le 0.25MPa, o le tafe o le kesi o le 250L i le 1H, ma le taimi faʻaalia o le 6h.Ona fa'amama lea o le xylene e le'i tali atu i le ausa, o le okesene o mea o lo'o tusi kemikolo na fa'asalaina i le acid hydrochloric concentrated i le pH 2, fa'afefe ma fa'amalieina, ma fa'amama.O le keke faamama sa fa'asusu i le p-xylene, ona fa'amama ma fa'agogo ina ia maua ai le p-methylbenzoic acid.O le anotusi o le p-methylbenzoic acid na sili atu nai lo le 96%.O le tasi auala o le liua o le p-xylene o le 40%, ma o le fua o le 60-70%.

2. Na saunia e ala i le oxidation o p-isopropyltoluene ma nitric acid.20% nitric acid ma le p-isopropyltoluene na faʻafefiloi, faʻafefe ma faʻamafanafana i le 80-90 ℃ mo le 4h, ona faʻamafanafanaina lea i le 90-95 ℃ mo le 6h.Fa'amafanafanaina, fa'amama, toe fa'asalaina o keke faamama ma toluene e tu'uina atu ai le p-methylbenzoic acid i le 50-53% fua.E le gata i lea, o le p-xylene na faʻamaʻiina e le nitric acid concentrated mo le 30 h, ma o le fua o le 58%.

Fa'atatauga

E mafai ona faʻaaogaina i le gaosiga o le vailaʻau aromatic hemostatic, p-formonitrile, p-toluenesulfonyl chloride, mea faʻapitoa, mea faʻapipiʻi faʻasolosolo, vailaʻau faʻamaʻi e maua ai le fungicide phosphoramide.E mafai foi ona faʻaaogaina i le manogi ma ata tifaga.Mo le fuafuaina o le thorium, vavaeeseina o le calcium ma le strontium, faʻasologa o meaola.E mafai foʻi ona faʻaaogaina e fai ma vailaʻau faʻapitoa, mea photosensitive, vailaʻau faʻamaʻi ma mea faʻalaʻau.


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