Waikawa P-toluic

1. Ka mahia ma te whakapouritanga o te p-xylene me te hau.Ina whakamahia te tikanga pehanga hau, ka taea te whakauru i te xylene me te cobalt naphthenate ki roto i te kohua hohenga, ka uru mai te hau ina whakamahana ki te 90 ℃.Ka whakahaerehia te pāmahana tauhohenga i te 110-115 ℃ mo te 24 haora, me te 5% o te p-xylene ka huri ki te waikawa p-methylbenzoic.Matao ki te pāmahana rūma, tātari, horoia te keke tātari ki te p-xylene, ka maroke kia whiwhi waikawa p-methylbenzoic.Ka hangaruatia te P-xylene.Ko te hua ko te 30-40%.I te wa e whakamahia ana te tikanga whakapouri, ko te 125 ℃ te pāmahana tauhohenga, ko te 0.25MPa te pehanga, ko te 250L te rere o te hau i roto i te 1H, ko te wa tauhohenga ko te 6h.I muri iho, ko te xylene kaore ano kia tauhohehia ki te mamaoa, ka whakakawatia te rauemi pukapuka matū hāora ki te waikawa pūmāota ki te pH 2, ka whakaohokia, ka whakamataohia, ka tātarihia.I rukuhia te keke tātari ki te p-xylene, katahi ka tātarihia ka whakamaroke kia whiwhi waikawa p-methylbenzoic.Ko te ihirangi o te waikawa p-methylbenzoic neke atu i te 96%.Ko te tere hurihanga kotahi-ara o p-xylene ko 40%, a ko te hua ko te 60-70%.

2.I whakaritea e te oxidation o te p-isopropyltoluene me te waikawa nitric.20% te waikawa nitric me te p-isopropyltoluene i konatunatua, i whakakorikorihia, i whakamahana ki te 80-90 ℃ mo te 4h, ka whakamahana ki te 90-95 ℃ mo te 6h.Te whakamatao, te filtration, te whakamaaramatanga o te keke tātari ki te toluene hei hoatu waikawa p-methylbenzoic i roto i te 50-53% hua.I tua atu, i oxidized te p-xylene e te waikawa nitric concentrated mo te 30 haora, a ko te hua ko te 58%.