N, N-Dimethylaniline

Waxa kale oo loo yaqaan dimethyl tiphenylamine, oo aan midab lahayn ama iftiin huruud ah dareere saliid ah, oo leh ur ur xun, si sahlan loo oksijiyeen hawada ama qorraxda hoosteeda oo la isticmaalo zee madow. Cufnaanta qaraabada ah (20 ℃ / 4 ℃) 0.9555, barta qaboojinta 2.0 ℃, barta karkarinta 193 ℃, barta flash (furitaanka) 77 ℃, dhibic flash 317 ℃, viscosity (25 ℃) 1.528mpactive 1.528mpactive . Ku milma ethanol, ether, chloroform, benzene iyo dareerayaasha kale ee organic. Ku milma noocyo kala duwan oo xeryahooda organic. Waxoogaa ku milmay biyaha. Way gubanaysaa wayna gubi doontaa haddii uu olol furan yahay. Uumiga iyo hawadu waxay samayn doonaan isku dhafka qarxa oo leh xadka qarxa oo ah 1.2% ~ 7.0% (vol). Aad bay sun u tahay, iyo gaaska aniline ee sunta ah waxaa lagu sii daayaa kala-goynta tamarta kulaylka badan. Waxaa lagu nuugi karaa maqaarka oo sababa sunta, LD501410mg/kg, diiradda ugu badan ee la ogol yahay ee hawada waa 5mg/m3.
Habka kaydinta
1.Storage Precautions[25] Ku kaydi bakhaar qabow oo hawo wanaagsan leh. Ka fogow dabka iyo ilaha kulaylka. Ku hay weelka mid xiran. Waa in si gooni ah loo kaydiyaa asiidhka, halogens, iyo kiimikooyinka la cuni karo, oo aan waligood la qasin. Ku qalabaysan noocyo u dhigma iyo tirada qalabka dab-damiska. Aagga kaydinta waa in lagu qalabeeyaa qalabka daaweynta degdegga ah ee daadinta iyo alaabta hoyga ku habboon.

2. Qaado baakadaha durbaanka birta ah ee xidhan, 180kg durbaankiiba, kuna kaydi meel qabow oo hawo leh. Kaydi oo rarid si waafaqsan xeerarka walxaha guban iyo sunta ah.
habka synthesis
1. Waxaa lagu helaa falcelinta u dhaxaysa aniline iyo methanol iyadoo ay jirto joogitaanka sulfuric acid heerkulka sare iyo cadaadiska sare. Socodka geedi socodka:1. 790kg aniline, 625kg methanol, 85kg of sulfuric acid (ammonium 100%) ayaa lagu daraa kiliyaha falcelinta, heerkulka xakamaynta 210-215 ℃, cadaadiska 3.1MPa, ka falcelin 4h, ka dibna sii daayo cadaadiska, walxaha la sii daayo in ay Kala-soocida, oo lagu dhex-dhexaadiyay 30% sodium hydroxide, taagan, iyo milixda ammonium-ka hoose ee quaternary waa la kala saaray. Markaas at 160 ℃, 0.7-0.9MPa hydrolysis falcelinta 3h, alaabta hydrolysis iyo lakabka sare ee alaabta saliidda ah oo la isku daray by dhaqidda ka dib vacuum distillation ee alaabta la dhammeeyey.

2. Isticmaalka methanol iyo aniline sida alaabta ceeriin ah, waxa lagu farsameeyey by alumina kataliye hoos xaaladda 200-250 ℃ oo leh methanol xad-dhaaf ah iyo cadaadiska atmospheric. Kootada isticmaalka alaabta ceeriin: aniline 790kg/t, methanol 625kg/t, sulfuric acid 85kg/t. Diyaarinta shaybaarka waxay ka falcelin kartaa aniline leh phosphate trimethyl.

3, aniline iyo methanol isku dhafan (n aniline: n methanol ≈ 1: 3), iyo iyada oo loo marayo bamka cabbiraadda garaaca wadnaha oo aan dib-u-celin ahayn oo lagu duray 0.5h-1 xawaaraha hawada ee reactor qalabaysan kicin, falcelinta falcelinta marka hore ee galaaska Kala-soocida dareeraha gaaska, kala-soocida dareeraha hoostiisa ee la ururiyo waqtiyo joogto ah ayaa laga saaray falanqaynta chromatographic.

Sannadkii 2001, Jaamacadda Nankai iyo Tianjin Ruikai Technology Development Co., Ltd. waxay si wadajir ah u sameeyeen kicinta methylation aniline oo aad waxtar u leh, waxayna xaqiiqsadeen isku-dhafka gaaska-wejiga ee N, N-dimethyl aniline. Nidaamku waa sida soo socota: Aniline dareere ah ayaa lagu qasi karaa methanol, oo uumiga ku jira munaaradda uumiga, ka dibna la galay reactor tubbada leh xawaaraha hawada ee 0.5-1.0h-1 (sariirta go'an ee reactor tubular waxay ku qalabaysan tahay nano raran Ka-talistada adag), oo si joogto ah loo soo saaray 250-300 ℃ oo hoos timaada cadaadiska atmospheric, oo leh dhalidda DMA ee ka badan 96%.

Habka sifaynta: Inta badan waxa ku jira wasakh sida aniline iyo N-methyl aniline. N,N-dimethylaniline waxa lagu milan yahay 40% sulfuric acid waxaana lagu miiray uumiga biyaha. Sodium hydroxide ayaa lagu daraa si ay uga dhigto alkaline. Distillation-ka waxaa lagu sii wadaa uumiga biyaha. Distillate-ka waxaa loo kala saaraa lakabyo biyo ah waxaana lagu qallajiyaa potassium hydroxide. Cadaadiska caadiga ah ee cadaadiska waxaa lagu fuliyaa joogitaanka acetic anhydride. Distillate-ka waxaa lagu dhaqaa biyo si looga saaro raadadka acetic anhydride, waxaa lagu qallajiyaa potassium hydroxide, oo ay ku xigto barium oxide, oo lagu nadiifiyo cadaadiska hoos u dhaca iyadoo ay jirto qulqulka nitrogen. Hababka kale ee lagu sifeeyo distillate-ka waxa ka mid ah in lagu daro 10% acetic anhydride iyo refluxing dhowr saacadood si meesha looga saaro aminyada aasaasiga ah iyo kuwa sare. Ka dib qaboojinta, xad dhaaf ah 20% hydrochloric acid ayaa lagu daraa oo laga soo saaraa ether. Lakabka aashitada hydrochloric waa alkaline leh alkali ka dibna waxaa laga soo saaraa ether, lakabka ether-kana waxaa lagu qallajiyaa potassium hydroxide waxaana lagu miiray cadaadiska hoos u dhaca ee hoos yimaada qulqulka nitrogen. N,N-dimethylaniline waxa kale oo loo rogi karaa cusbada picric acid, recrystallized ilaa meel dhalaalaysa oo joogto ah ka dibna ku qudhuntay 10% diirran xal aqueous sodium hydroxide. Ka dib waxaa lagu soo saaraa ether, la dhaqo oo la qalajiyo, oo lagu nadiifiyo cadaadiska hoos u dhaca.

5. Aniline, methanol iyo sulfuric acid isku dhafan ee saamiga, falcelinta uumiga ee autoclave ah, wax soo saarka falcelinta by soo kabashada gargaarka cadaadiska ee methanol, ku dar dhexdhexaadinta alkali, kala-soocidda ka dibna distillation by cadaadis la dhimay si loo helo alaabta.

6. N, N-dimethylaniline waxaa dhalin kara falcelinta methylation ee aniline iyo trimethyl phosphate, ka dibna laga soo saaro ether, la qalajiyey oo la jarjaray.

7. N, N-dimethylaniline waxaa lagu dhejin karaa sariirta catalytic ee Ziegler ee nidaamka copper-manganese ama nidaamka copper-zinc-chromium at 280 ℃ oo leh isku dhafka aniline iyo methanol ee saamiga 1: 3.5. N,N-dimethylaniline ee la helay waxaa lagu soo ururiyay 193-195℃ 54-tab tiirarka distillation column waxaana lagu soo ururiyay dhalooyin dhalada bunni ah. Diyaarinta saafiga ah N,N-dimethylaniline, N,N-dimethylaniline waxaa lagu duri karaa gaaska nitrogen sida gaaska qaada ee gaaska diyaarinta chromatograph kaas oo leh tiir fosfateed bir ah.