P-toluic acid

1. Waxaa lagu diyaariyaa oksaydheynta catalytic ee p-xylene oo leh hawo.Marka habka cadaadiska jawiga la isticmaalo, xylene iyo cobalt naphthenate ayaa lagu dari karaa dheriga falcelinta, waxaana hawada la soo galinayaa marka lagu kululeeyo 90 ℃.Heerkulka falcelinta waxaa lagu xakameynayaa 110-115 ℃ ilaa 24 saacadood, iyo qiyaastii 5% p-xylene ayaa loo beddelaa p-methylbenzoic acid.Ku qabooji heerkulka qolka, sifee, ku dhaq keega filtarta leh p-xylene, oo engeji si aad u hesho p-methylbenzoic acid.P-xylene ayaa dib loo warshadeeyayWax-soo-saarku waa 30-40%.Marka habka oksaydhka cadaadiska la isticmaalo, heerkulka falcelinta waa 125 ℃, cadaadisku waa 0.25MPa, heerka socodka gaaska waa 250L 1H, iyo waqtiga falcelinta waa 6h.Dabadeed, xylene-kii aan fal-celinta lahayn ayaa lagu nuugay uumi, alaabta buugta kiimikada oksijiinta waxaa lagu daray aashitada hydrochloric ee pH 2, walaaqay oo la qaboojiyey, oo la sifeeyay.Keega shaandhada ayaa lagu qooyay p-xylene, ka dibna la sifeeyay oo la qalajiyey si loo helo p-methylbenzoic acid.Maaddada p-methylbenzoic acid waxay ka badnayd 96%.Heerka beddelka hal-jidka ah ee p-xylene wuxuu ahaa 40%, wax-soo-saarkuna wuxuu ahaa 60-70%.

2.Waxaa la diyaariyey by oksaydhka p-isopropyltoluene leh nitric acid.20% nitric acid iyo p-isopropyltoluene ayaa la isku qasan yahay, walaaqay oo la kululeeyay 80-90 ℃ 4h, ka dibna kuleyl ilaa 90-95 ℃ 6h.Qaboojinta, sifaynta, recrystalization of keega filter leh toluene si loo siiyo p-methylbenzoic acid 50-53% dhalidda.Intaa waxaa dheer, p-xylene waxaa oxidized by nitric acid 30 saacadood, iyo wax soo saarku wuxuu ahaa 58%.