4-Bromo-3-fluorobenzoic acid (CAS # 153556-42-4)
Nga korero tohutoro
| Whakamahinga | Ko te waikawa 4-bromo-3-fluorobenzoic he matū matū nui ka taea te whakamahi ki te whakareri i nga momo raau taero (pērā i te benzamit tarukino anti-mate pukupuku). |
| Tikanga whakahiato | Ka taea te whiwhi waikawa 4-bromo-3-fluorobenzoic ma te oxidation o te 4-bromo-3-fluorotoluene na roto i te pāhare pāporo. (1) hāoratanga: 100kg o kg4-bromo -3-fluorotoluene, 120kg wai me te 0.1kg o te waipiro fatty polyether sodium sulfate (AES) ka taapirihia ki te K-400L karaihe-raina hohenga hohenga (i hangaia e Jiangsu matū ararewa ahumahi. taputapu co., ltd.) me te whakakorikori me te whakamahana me te taputapu reflux condensation, katahi 167kg o te pāhare pāhare pāporo ka āta tāpirihia i raro i te āhua whakakorikori, ka pupuri i roto i te āhua koropupū, ka tauhohe mō te 9 hāora, ka mutu te tauhohenga i muri i te otinga reflux kua kore he pirepire hinu; (2) Tātari: tātari te otinga tauhohenga i whiwhi i te taahiraa (1) i te wera ki te whiwhi i te filtrate kei roto te hua whaainga 4-bromo -3-fluorobenzoic acid; (3) Tango pāhare pāporo: Hei tango i te toenga pāhare pāporo i roto i te filtrate, me tapiri 0.1kg o te konutai sulfite ki te filtrate i whiwhi i te taahiraa (2), ko te nui o te taapiri o te konutai sulfite i runga i te wai maramara te tae papura o te otinga. (4) waikawa: i roto i te ahua ohooho, me ata taapiri te matū ki te otinga i puta mai i te taahiraa (3) me te kukū o te 12mol/L waikawa pūhaumāota. ina he 2.2 te uara pH o te otinga, mutu te taapiri i te waikawa maatawai katahi ka haere tonu te tauhohenga mo te 30min. (5) whātioatanga: i roto i te ahua ohooho, te otinga i puta i te taahiraa (4) ka whakamatao ki te 2°C, a ko nga kiripiri i roto i te otinga he waikawa 4-bromo-3-fluorobenzoic. I te wa o te mahi, me whakaoho tonu, ki te kore ka hangaia e te waikawa 4-bromo-3-fluorobenzoic he totoka nui, he uaua ki te mahi i roto i nga tukanga e whai ake nei; (6) Te filtration me te horoi: Ko te wai whakauru kei roto nga kiripiri waikawa 4-bromo-3-fluorobenzoic i whiwhi i te taahiraa (5) ka centrifuged ki te tiki i tetahi keke tātari he hua waikawa 4-bromo-3-fluorobenzoic, te hua maru. ka horoia ki te wai parakore me te centrifuge (ma te whakamahi i te centrifuge me te mahi horoi) kia whiwhi ai te waikawa 4-bromo-3-fluorobenzoic parakore; (7) Te whakamaroke: Ko te totoka waikawa 4-bromo-3-fluorobenzoic kua oti te whakarite i te taahiraa (6) ka whakamaroke ki te 75°C mo nga haora 12 kia whiwhi 197 kg4-bromo-3-fluorobenzoic acid, he nui ake i te 98 %. |
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