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CAS No. [95-68-1] Txheej txheem ntau lawm. 2,4-Dimethylaniline
CAS lub npe: Benzenamine, 2,4-dimethyl- Cov ntaub ntawv keeb kwm: beil. 11, 1111; E1, 483; E2, 606; E3, 2469; E4, 2545.
Siv: kua txiv kab ntxwv 17, 24. kua qaub liab 8, 26, 26: 1, 26: 2, 40, 135, 336. dej khov xim txuas sib xws 29. liab liab ncaj 126, 168, 264. Ncaj nraim violet 14. tawg daj 11 Cov.
Cov zaub mov daj 12. Khoom noj khoom haus liab 5. Solvent daj 18, 44, 126. Kuab xim txiv kab ntxwv 7, 30. Kev cuam tshuam cov qeb: txo nitro.
BIOS 1146, 53. 2,4-Dimethylaniline. 2,4-Dimethylaniline. Kev txhais lus Askiv los ntawm German. Tsis nyob hauv kuv cov khoom.

Hauv 10 m3 txo lub nkoj nrog cov dej ntws rov qab, 1800 L dej, 500 L ntawm 20% ferrous chloride tov thiab 800 kg ntawm cov hlau rov qab hmoov los ntawm cov yav dhau los tau ntxiv. Kev sib tsoo tau pib thiab kev daws teeb meem tau coj mus rau lub rwj los ntawm kev tso cua sov ncaj qha. Tsis pub dhau 20 teev 2500 L (2800 kg) ntawm 4-nitro m-xylene thiab 2500 kg ntawm cov hmoov hlau tau ntxiv rau lub reductor, tus nqi sib ntxiv tau kho ntxiv kom cov dej sib xyaw, rhaub tau tsuas yog thaum pib thiab xaus. Cov pa nchuav tawm los ntawm reductor condenses nyob rau hauv serpentine condenser thiab xa rov qab mus rau lub reductor (los ntawm tus tov khoom, sib xyaw nrog 4-nitro m-xylene) qhov twg nitro additive yog diluted nyob rau hauv txoj kev no los tsim kev nyob ntsiag to txo. Thaum kev kuaj pom qhov qauv ua kom tsis muaj xylene, qhov kev txo qis yog ua tiav thiab do rau lwm 4-5 teev.
Ntsuas: Cov qauv yog coj los ntawm lub reductor rau chav distillation, cov roj los ntawm cov zauv feem yuav tsum tsis muaj xim thiab tsim cov tshuaj ntshiab nrog hydrochloric acid.
Kev rho tawm: cov khoom siv los ntawm cov khoom siv txo qis yog nias rau hauv qhov rho tawm thiab kho nrog 6000 L ntawm benzene ntawm 60 ° C thiab do, qhov sib tov yog do rau 1 teev thiab sab laug sawv ntsug li 1 teev. Qhov sib cuam tshuam ntawm dej thiab dej khov tau txiav txim siab los ntawm kev xaim hlua khi rau ib ntab hauv benzene tab sis ntab ntawm dej, piv txwv li, qhov tob ntawm cov kab rov tav. Ib qho ntawm cov txheej txheem kev cai tswj hwm lub raj muaj qis dua qis dua qhov ntsuas ntsuas, thiab txheej txheej benzene sab saud tau nias rau hauv lub pas dej nrog nitrogen. Qhov kev rho tawm no tau nqa tawm 6-7 zaug, thiab cov kev rho tawm tau ua tiav thaum tsuas yog 3-5 kg ​​ntawm m-xylene amine tseem nyob hauv cov extractor.
Thawj peb qhov kev rho tawm nrog cov gravities tshwj xeeb ntawm txog 0.96, 0.925 thiab 0.90 raug xa mus rau benzene rov qab distillation kettle, thiab tom ntej ob peb qhov kev rho tawm nrog cov gravities tshwj xeeb hauv qab 0.90 yog siv ua extractants rau thawj, ntxiv zaum ob thiab thib peb ntawm cov ntxiv tom ntej. Txoj kev daws teeb meem benzene ntawm xylenolamine nyob rau hauv lub thawv khaws cia thiab xa mus rau lub hwj kais distillation, qhov twg benzene yog evaporated thiab xa rov qab mus rau qhov chaw rho tawm rau kev siv ntxiv. Qhov xylenolamine tseem nyob hauv lub hwj kais distillation.
Qhov aqueous theem seem nyob rau hauv cov extractor chav distillation rau 4-5 teev kom rov qab benzene, thiab tom qab ntawd cov kev sib xyaw tag nrho nrog huab cua siab mus rau hauv vaj qhia kem separator, nyob rau hauv lub siab mus rau hauv qab ntawm lub separator kom dhau dej, hla dej nrawm kom ua cov hlau oxide ntab, los ntawm kev nthuav tawm sab saum toj rau ib cov hlau sludge cia tank, qhov twg cov paug tawm ntawm cov dej khib nyiab.
Cov tshuaj tsis muaj hlau, hnyav dua li cov hlau oxide, tog mus rau hauv qab ntawm cylindrical separator nyob rau hauv qhov ntau ntawm 800-1000 kg thiab xa rov qab rau tom ntej txaws ntawm kev txo hwj kais.
Distillation: Cov khoom siv nyoos los ntawm cov kem distillation, tom qab tshem tawm ntawm benzene, raug xa mus rau lwm lub hwj kais distillation nrog kem, qhov twg nws yog qhov ua kom zoo nkauj los ntawm cov distillation ntawm 20-30 hli thiab 125-135 ° C. Qhov ua kom distillation yog 97-98%. Qhov ua kom distillation yog 97-98%.
Tas nrho cov khoom yog 90-91%. Tom qab cov ntaub ntawv sib xyaw, m-Xylene-4-aniline yuav tsum pom tseeb thiab lub teeb daj hauv xim. Kev daws hauv hydrochloric acid yuav tsum yog qhov tseeb.
PB 25624, 1151. xylidine. 2,4-xylene-aniline Devon ntau lawm txheej txheem. (Iron hmoov txo txoj kev) Tsis theej.
Tianjin Wuyi Tshuaj Hoobkas, Tianjin Dye Lub koom haum tshawb fawb. Cov ntsiab lus luv luv ntawm kev sim me me rau 2,4-Dimethylaniline ua ib nrab ntawm cov txiv qaub daj. [J] Kev Kho Mob Kev Lag Luam, 1970, 5/6, 84-85 (62).
Cov txheej txheem kev khiav hauj lwm: (khoom sib xyaw: me ntsis). Ntxiv cov dej, hydrochloric acid thiab hmoov hmoov rau hauv lub raj mis 3000 ml nrog cov khoom ua kom sov thiab rov ua kom sov, do rau 15 feeb, tom qab ntawd maj mam nce qhov kub kom txog 90-98 ℃ thiab pib ntxiv nitroxide. Yog hais tias nitroxide ploj lawm, tom qab ntawd ntxiv cov nitroxide ntxiv, feem ntau tsis pub dhau 1.5-2 teev. Tom qab ntxiv cov nitroxide, khaws cov tshuaj tiv thaiv ntawm qhov kub saum toj no rau 2-2.5 teev, kom txog rau thaum daj osmosis ploj thiab tsis muaj ntxhiab tsw ntxhiab ntawm nitroxide, qhov kev tawm tsam txo yuav mus txog qhov kawg. Tom qab ntawd txias kom txog 40-50 ℃, ntxiv sodium carbonate thiab neutralize rau pH 7.5-8, tom qab ntawd ntsuas qhov nruab nrab cov tshuaj tiv thaiv ntawm cov ntawv lim nrog alkali sulfide tov.
Xyoo 2000 ml ntawm peb lub raj mis rau hauv qhov txo qis ntawm cov tshuaj tiv thaiv, ua ntej nias lub tiaj-hauv qab lub raj dej rau lub tshuab nqus dej, tom qab ntawd ncaj qha raj condenser, lub condenser tom qab distillate neeg mloog, nyob rau hauv kev txo qis ntawm peb lub qhov ncauj lub raj mis, muab ib qho hluav taws xob cua sov ua kom sov, thaum cov neeg sawv cev ntawm cov distillate hauv tag nrho, txav mus rau hauv lub qhov tso pa tawm ua kua cais kom sib cais ua cov khaubncaws sab nraud povtseg, m-xylene amines tawm, thiab tom qab ntawd hnyav dua los tshawb xyuas.
Tianjin Wuyi Tshuaj Hoobkas, Tianjin Dye Lub koom haum tshawb fawb. Cov ntsiab lus ntawm 2,4-xylene amine kev xeem me. [J] Kev Kho Mob Kev Lag Luam, 1975, 2, 63. Shenyang Lub Koom Haum Suav Sau No. 75067.
Nws yuav tsum tau hais: yav dhau los Zuaj Kev Lag Luam tsis raug xa tawm, yog li CA tsis tau muab nws rho tawm, thiab tsis muaj ib tus neeg hauv Suav tau teev cov ntawv no txog tam sim no, yog li Tuam Tsev Qhia Xov Xwm Tshuaj Hauv Tuam Tshoj tsis paub txog nws!