I-P-toluic Acid
Ifomula yolwakhiwo
Igama leKhemikhali: I-P-toluic Acid
Amanye amagama: i-4-methylbenzoic acid
Ifomula yemolekyuli: C8H8O2
ubunzima bemolekyuli: 136.15
Inkqubo yamanani:
CAS: 99-94-5
I-EINECS : 202-803-3
HS IKHOWUDI: 29163900
Idatha yePhysical
Imbonakalo: mhlophe ukuya kokukhanya komgubo wekristale otyheli
Ubunyulu: ≥99.0% (HPLC）
Indawo yokunyibilika: 179-182°C
Indawo yokubila: 274-275°C
Ukunyibilika kwamanzi: <0.1 g/100 mL ku-19°C
Indawo yokudanyaza: 124.7°C
Uxinzelelo lomphunga: 0.00248mmHg ku-25°C
Ukunyibilika: Inyibilika ngokulula kwimethanol, ethanol, ether, ayinyibiliki emanzini ashushu.
Indlela yokuvelisa
1. Ilungiswa nge-catalytic oxidation ye-p-xylene ngomoya.Xa kusetyenziswa indlela yoxinzelelo lwe-atmospheric, i-xylene kunye ne-cobalt naphthenate inokongezwa kwi-reaction pot, kwaye umoya ungeniswe xa ufudumeza ukuya kuma-90 ℃.Ubushushu bokusabela bulawulwa kwi-110-115 ℃ malunga neeyure ezingama-24, kwaye malunga ne-5% ye-p-xylene iguqulwa ibe yi-p-methylbenzoic acid.Phola kwiqondo lobushushu begumbi, hluza, hlamba ikeyiki yokucoca nge-p-xylene, kwaye uyomise ukufumana i-p-methylbenzoic acid.IP-xylene iyarisayikilishwa.Imveliso yi 30-40%.Xa kusetyenziswa indlela ye-oxidation yoxinzelelo, ubushushu bokusabela yi-125 ℃, uxinzelelo ngu-0.25MPa, izinga lokuhamba kwegesi yi-250L kwi-1H, kwaye ixesha lokuphendula liyi-6h.Emva koko, i-xylene engaphendulwanga yahlanjululwa ngumphunga, i-oksijini yencwadi yeekhemikhali yencwadi yayifakwe i-acidified hydrochloric acid kwi-pH 2, ixutywe kwaye ipholile, kwaye yahluzwa.Ikhekhe lokucoca lifakwe kwi-p-xylene, emva koko yahluzwa kwaye yomiswa ukufumana i-p-methylbenzoic acid.Umxholo we-p-methylbenzoic acid wawungaphezulu kwe-96%.Izinga lokuguqulwa kwendlela enye ye-p-xylene yayingu-40%, kwaye isivuno sasiyi-60-70%.
I-2.Yalungiswa nge-oxidation ye-p-isopropyltoluene kunye ne-nitric acid.I-20% ye-asidi ye-nitric kunye ne-p-isopropyltoluene yaxutywa, yaxutywa kwaye yatshiswa kwi-80-90 ℃ ye-4h, emva koko ishushu kwi-90-95 ℃ nge-6h.Ukupholisa, ukuhluzwa, ukuhlaziya ikhekhe lokucoca nge-toluene ukunika i-p-methylbenzoic acid kwi-50-53% yesivuno.Ukongeza, i-p-xylene i-oxidized yi-nitric acid egxininisiweyo ye-30 h, kwaye isivuno sasiyi-58%.
Isicelo
Ingasetyenziswa ekwenzeni i-hemostatic aromatics acid, i-p-formonitrile, i-p-toluenesulfonyl chloride, imathiriyeli ye-photosensitive, i-organic synthesis intermediates, ishishini le-pesticide ukuvelisa i-fungicide phosphoramide.Isenokusetyenziswa nakwiziqholo nakwifilimu.Ukuzimisela kwe-thorium, ukuhlukana kwe-calcium kunye ne-strontium, i-organic synthesis.Isenokusetyenziswa njengendawo ephakathi kweyeza, imathiriyeli yefotosensitive, i-pesticide kunye ne-organic pigment.
