N, N-dimethyl-1,3-propanediamine (tom qab no hu ua DMAPA) yog qis dua aliphatic diamine nrog ob pawg tertiary thiab thawj cov amino pawg hauv cov molecule. Nws yog cov kua uas tsis muaj xim thiab pob tshab nrog ammonia tsw. Nws haus luam yeeb hauv huab cua thiab soluble hauv dej thiab cov kuab tshuaj organic. Nws cov mis molecular yog C5H14N2 thiab nws cov qauv qauv yog (CH3)2NCH2CH2CH2NH2.
Nws yog ib qho tseem ceeb ntau yam ntawm fatty amine compounds thiab ib qho tseem ceeb organic raw khoom nruab nrab. Nws yog dav siv nyob rau hauv cov tshuaj niaj hnub, tshuaj tua kab, dyes, resins, thiab lwm yam. Tam sim no, feem ntau DMAPA nyob rau hauv Tuam Tshoj yog tsuas yog siv los npaj betaine thiab amidopropyldimethylamine, uas yog siv nyob rau hauv cov khoom siv tshuaj niaj hnub xws li tshuaj zawv plaub hau, da dej gel, me nyuam da dej gel, conditioner, kua xab npum thiab detergent. Tsis tas li ntawd, DMAPA kuj tseem siv los ua polyurethane catalyst, epoxy resin curing agent thiab accelerator, thiab hauv kev tsim cov dyes.

Txoj kev tseem ceeb ntawm DMAPA yog: 1. Siv dimethylamine thiab acrylonitrile ua raw khoom, dimethylaminopropionitrile (DMAPN) yog tau los ntawm Michael ntxiv. Nyob rau hauv tus txheej txheem ntawm industrial npaj ntawm DMAPN, kwv yees li 2% ntawm tag nrho cov loj ntawm raw cov ntaub ntawv feem ntau yog ntxiv rau cov dej los txhawb cov tshuaj tiv thaiv ntxiv thiab tshem tawm ntau tshaj dimethylamine azeotropically; 2. Lub DMAPN tau txais los ntawm distillation hauv thawj kauj ruam yog catalytically hydrogenated nyob rau hauv lub siab kub. Kev npaj ntawm DMAPA

Hauv kauj ruam thib ob ntawm hydrogenation los npaj DMAPA, ib sab cov tshuaj tiv thaiv yuav tshwm sim. Cov txiaj ntsig ntawm cov tshuaj tiv thaiv no feem ntau yog qhov thib ob amine bis-DMAPA thiab tertiary amine tri-DMAPA. Tam sim no, kev tsim khoom hauv tsev ntawm DMAPA feem ntau siv cov tshuaj tiv thaiv hluav taws xob, thiab hydrogenation catalyst yog hmoov Raney nickel. Txhawm rau txhawm rau txhawm rau tsim cov khoom lag luam no, nws yog qhov yuav tsum tau ntxiv 12% -16% ntawm cov catalyst pawg ntawm caustic alkali aqueous tov los yog kua ammonia, caustic alkali aqueous tov thiab kua ammonia Kev siv yuav tsim ib tug loj npaum li cas. cov dej khib nyiab thiab cov kua khib nyiab, uas nyuaj rau degrade thiab txheej txheem, ua rau lub nra ntawm kev ua haujlwm tom qab.

Cov ntaub ntawv tiv tauj

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