Kuj hu ua dimethylaniline, tsis muaj xim rau lub teeb daj oily kua, khaus tsw, nyob rau hauv huab cua lossis nyob rau hauv lub hnub yooj yim oxidation siv Ze ua tob. Qhov sib piv ceev (20 ℃ / 4 ℃) 0.9555, freezing point 2.0 ℃, boiling point 193 ℃, flash point (qhib) 77 ℃, ignition point 317 ℃, viscosity (25 ℃) 1.528 MPa · s, refractive index (N20D) 1.5584. Yaj hauv ethanol, ether, chloroform, benzene thiab lwm yam organic solvents. Muaj peev xwm yaj ntau yam organic compounds. Me ntsis yaj hauv dej. Flammable, yuav hlawv hauv qhib hluav taws, pa thiab huab cua los ua ib qho sib tov tawg, tawg txwv ntawm 1.2% ~ 7.0% (vol). Muaj tshuaj lom ntau, thermal decomposition siab ntawm kev tso tawm ntawm cov tshuaj lom aniline roj. Yuav nqus tau los ntawm daim tawv nqaij thiab lom, LD501410mg / kg, qhov siab tshaj plaws tso cai concentration hauv huab cua yog 5mg / m3.

Cov txheej txheem khaws cia

1. Cov Lus Cim Txog Kev Khaws Cia [25] Khaws cia rau hauv qhov chaw txias thiab muaj cua nkag. Khaws cia kom deb ntawm hluav taws thiab cua sov. Khaws lub thawv kom kaw. Yuav tsum khaws cia cais ntawm cov kua qaub, halogens thiab cov tshuaj lom neeg hauv zaub mov, thiab yuav tsum tsis txhob sib xyaw. Muab cov khoom siv tua hluav taws sib txawv thiab ntau npaum li cas. Qhov chaw khaws cia yuav tsum muaj cov khoom siv kho mob thaum muaj xwm txheej ceev thiab cov ntaub ntawv khaws cia tsim nyog.

2. Ntim rau hauv lub thoob hlau, 180kg ib thoob. Khaws cia rau qhov chaw txias thiab muaj cua nkag. Khaws cia thiab thauj mus los raws li cov cai ntawm cov khoom uas yoo kub hnyiab thiab muaj tshuaj lom.

Cov txheej txheem tsim ua

1. Los ntawm aniline thiab methanol nyob rau hauv qhov muaj sulfuric acid, los ntawm qhov kub thiab txias siab thiab siab siab reaction. Cov txheej txheem ntws: 1. Ntxiv 790kg ntawm aniline, 625kg ntawm methanol thiab 85kg ntawm sulfuric acid (100% ntawm ammonium) rau lub reactor, tswj qhov kub thiab txias 210-215 ℃ thiab qhov siab 3.1MPa, react rau 4 teev, tom qab ntawd tso tawm qhov siab, tso tawm cov khoom mus rau lub separator, neutralize nrog 30% sodium hydroxide, sawv ntsug, thiab cais cov ntsev ammonium quaternary qis dua. Tom qab ntawd hydrolysis reaction ntawm 160 ℃, 0.7-0.9MPa rau 3 teev, cov hydrolysate tshwm sim thiab cov roj sab saud tau ua ke nrog dej ntxuav thiab nqus tsev kom tau txais cov khoom tiav.

2, nrog methanol thiab aniline ua cov khoom siv raw, nyob rau hauv qhov xwm txheej ntawm ntau dhau methanol, atmospheric siab, 200-250 ℃, los ntawm alumina catalyst synthesis. Cov khoom siv raw siv quota: aniline 790kg / t, methanol 625kg / t, sulfuric acid 85kg / t. Kev npaj hauv chav kuaj tuaj yeem cuam tshuam aniline nrog trimethyl phosphate.

3. Sib xyaw aniline thiab methanol (N aniline: N methanol ≈ 1: 3) thiab txhaj rau hauv lub reactor uas muaj catalyst ntawm qhov ceev ntawm qhov chaw ntawm 0.5h-1 los ntawm lub twj tso kua mis reciprocating non-pulse metering. Cov tshuaj tiv thaiv effluent thawj zaug nkag mus rau hauv lub iav roj-kua separator, thiab cov kua sau ntawm qhov qis ntawm lub separator raug coj tawm tsis tu ncua rau kev tshuaj xyuas chromatographic.

4. Xyoo 2001, Nankai University thiab Tianjin Ruikai Science thiab Technology Development Co., Ltd tau koom ua ke tsim cov tshuaj catalyst aniline methylation zoo heev kom paub txog cov roj theem synthesis ntawm N, N-dimethylaniline. Cov txheej txheem yog raws li nram no: Tom qab cov kua aniline sib xyaw nrog methanol hauv qhov sib piv, nws tau vaporized hauv lub vaporization tower thiab tom qab ntawd nkag mus rau hauv lub tubular reactor nrog qhov chaw ceev ntawm 0.5-1.0h-1 (lub txaj ruaj khov ntawm lub tubular reactor yog nruab nrog lub nanometer khoom catalyst txhawb nqa) rau kev tsim khoom tas mus li ntawm 250-300 ℃ thiab atmospheric siab. Cov txiaj ntsig ntawm DMA yog siab dua 96%.

Txoj kev ua kom zoo: feem ntau muaj aniline, N-methyl aniline thiab lwm yam tsis huv. Thaum lub sijhawm ua kom zoo, N, N-dimethylaniline yaj rau hauv 40% sulfuric acid thiab ua kom cov pa dej ntws. Sodium hydroxide ntxiv rau kom nws yooj yim. Lub tshuab ua kom cov pa dej ntws txuas ntxiv mus. Lub tshuab ua kom zoo raug cais ua ib txheej dej thiab ziab nrog potassium hydroxide. Distillation ntawm qhov siab ntawm huab cua nyob rau hauv qhov muaj acetic anhydride. Lub tshuab ua kom zoo tau ntxuav nrog dej kom tshem tawm cov acetic anhydride me me, tom qab ntawd ziab nrog potassium hydroxide, ua raws li barium oxide thiab decompressed distillation hauv cov dej nitrogen. Lwm txoj kev ua kom zoo suav nrog ntxiv 10% acetic anhydride thiab reflux rau ob peb teev kom tshem tawm cov amines thawj thiab theem nrab. Tom qab txias, ntxiv ntau tshaj 20% hydrochloric acid thiab rho tawm nrog ether. Cov txheej hydrochloric acid tau ua alkaline los ntawm kev ntxiv alkali, thiab tom qab ntawd rho tawm nrog ether. Cov txheej ether tau ziab nrog potassium hydroxide thiab tom qab ntawd distilled nyob rau hauv siab nyob rau hauv nitrogen. N, N-dimethylaniline kuj tseem tuaj yeem hloov mus rau picronate, recrystallized mus rau qhov chaw yaj tas li nrog 10% sodium hydroxide aqueous kua sov kom decompose picronate. Extract nrog ether, ntxuav nrog dej thiab ziab tom qab distillation nqus tsev.

5. Aniline, methanol thiab sulfuric acid raug sib xyaw ua ke thiab ua kom sib xyaw hauv autoclave. Tom qab cov khoom siv tshuaj tiv thaiv rov qab los ntawm kev txo qhov siab, alkali ntxiv rau kev ua kom tsis muaj zog, sib cais, thiab tom qab ntawd cov khoom tau txais los ntawm kev distillation nqus tsev.

6. Cov tshuaj methylation ntawm aniline thiab trimethyl phosphate tuaj yeem tsim N, N-dimethylaniline: tom qab ntawd rho tawm nrog ether, distillation qhuav.

7. N, N-dimethylaniline tuaj yeem tsim los ntawm kev ntxiv cov aniline thiab methanol ntawm qhov sib piv ntawm 1: 3.5 hauv lub txaj catalytic ntawm Cu-Mn lossis Cu-Zn-Cr Ziegler catalyst ntawm 280 ℃. Cov N, N-dimethylaniline uas tau los ntawm kev sau rau hauv chav distillation ntawm 54 daim hlau hauv qhov ntau ntawm 193 txog 195 ℃ thiab ntim rau hauv lub raj mis iav xim av. Rau kev npaj chromatography ntshiab N, N-dimethylaniline, nitrogen tuaj yeem yog cov roj nqa, hauv kev npaj roj chromatography nrog Ben 犅 yaku kem txhaj tshuaj kho ntawm N, N-dimethylaniline, los ntawm kev sib cais thiab sau cov khoom tseem ceeb ntawm cov khoom ncov, thiab tom qab ntawd rau hauv lub khob iav ampoule foob tuaj yeem ua tau.

Lub hom phiaj tseem ceeb

1. Ib qho ntawm cov khoom siv raw rau kev tsim cov ntsev dyes (triphenyl methane dyes, thiab lwm yam) thiab cov dyes yooj yim, cov ntau yam tseem ceeb yog alkaline ci daj, alkaline ntshav 5GN, alkaline ntsuab, alkaline pas dej xiav, ci liab 5GN, ci xiav, thiab lwm yam. N, N-dimethylaniline hauv kev lag luam tshuaj rau kev tsim cov cephalosporin V, sulfamilamide B-methoxymidine, sulfamilamide dimethoxymidine, fluorouracil, thiab lwm yam, hauv kev lag luam tshuaj tsw qab rau kev tsim cov vanillin, thiab lwm yam. 2. Siv ua cov kuab tshuaj, cov hlau khaws cia, tus neeg sawv cev kho ntawm epoxy resin, kho accelerator ntawm polyester resin, catalyst rau polymerization ntawm ethylene compounds, thiab lwm yam. Nws kuj tseem siv rau hauv kev npaj cov basic triphenyl methane dyes, azo dyes thiab vanillin. 3. Cov khoom no yog siv ua catalyst rau kev ua polyurethane ua npuas ncauj yas nrog cov organic tin compounds. Kuj tseem siv ua roj hmab vulcanization accelerator, tawg, cov ntaub ntawv raw tshuaj. Nws yog ib qho ntawm cov khoom siv raw rau kev tsim cov xim pleev xim (triphenyl methane dyes, thiab lwm yam) thiab cov xim pleev xim yooj yim. Cov ntau yam tseem ceeb yog cov xim daj ci ntsa iab, xim ntshav BN, xim ntsuab yooj yim, xim xiav yooj yim, xim liab ci ntsa iab 5GN, xim xiav ci ntsa iab, thiab lwm yam. N, N-dimethylaniline hauv kev lag luam tshuaj rau kev tsim cov cephalosporin V, sulfamilamide N-methoxymidine, sulfamilamide - dimethoxymidine, fluorouracil, thiab lwm yam, hauv kev lag luam tshuaj tsw qab rau kev tsim cov vanillin, thiab lwm yam. 4. Siv ua tus kho kom sai ntawm epoxy resin, polyester resin thiab cov nplaum anaerobic, kom cov nplaum anaerobic tuaj yeem kho tau sai. Nws kuj tseem siv tau ua cov kuab tshuaj, cov tshuaj catalyst rau kev sib xyaw ntawm cov tshuaj ethylene, cov tshuaj tiv thaiv hlau, cov tshuaj nqus ultraviolet rau cov tshuaj pleev ib ce, cov tshuaj ua kom lub teeb pom kev zoo, thiab lwm yam. Kuj siv rau hauv kev tsim cov xim pleev xim yooj yim, cov xim pleev xim disperse, cov xim kua qaub, cov xim roj yaj thiab cov txuj lom (vanillin) thiab lwm yam khoom siv raw. 5. Cov tshuaj reagent siv rau kev txiav txim siab photometric ntawm nitrite. Nws kuj tseem siv ua cov kuab tshuaj thiab hauv kev tsim cov organic. 6. Siv ua cov xim nruab nrab, cov kuab tshuaj, cov tshuaj stabilizer, cov tshuaj analytical.