I-N, N-dimethyl-1,3-propanediamine (emva koku ebizwa ngokuba yi-DMPA) yi-aliphatic diamine ephantsi kunye namaqela aphakamileyo aphezulu kunye namaqela e-amino kwi-molecule. Lulwelo olungenambala noluselubala olunevumba le-ammonia. Iyatshaya emoyeni kwaye iyanyibilika emanzini nakwizinyibilikisi eziphilayo. Ifomula yayo ye-molecular yi-C5H14N2 kunye nefomyula yayo yesakhiwo (CH3) 2NCH2CH2CH2NH2.
Yenye yeendidi ezibalulekileyo zeekhompawundi ze-amine ezinamafutha kunye nemathiriyeli ekrwada ebalulekileyo ephakathi. Isetyenziswa kakhulu kwimichiza yemihla ngemihla, i-pesticides, idayi, i-resin, njl njl. Okwangoku, ininzi i-DMPA e-China isetyenziselwa ukulungiselela i-betaine kunye ne-amidopropyldimethylamine, ezisetyenziswa kwiimveliso zemichiza yemihla ngemihla ezifana ne-shampoo, i-gel yokugeza, i-gel yokugeza umntwana, i-conditioner, isepha engamanzi kunye nesicoci. Ukongeza, i-DMPA ikwasetyenziswa njenge-polyurethane catalyst, i-epoxy resin yokunyanga iarhente kunye ne-accelerator, kunye nokuveliswa kwedayi.

Indlela ye-mainstream synthesis ye-DMPA yile: 1. Ukusebenzisa i-dimethylamine kunye ne-acrylonitrile njengezinto eziluhlaza, i-dimethylaminopropionitrile (DMAPN) ifunyenwe ngokudibanisa kukaMichael. Kwinkqubo yokulungiswa kwemizi-mveliso ye-DMAPN, malunga ne-2% yobunzima obupheleleyo bezinto eziphathekayo ngokuqhelekileyo zongezwa emanzini ukukhuthaza ukusabela okongeziweyo kunye nokususa i-dimethylamine engaphezulu kwe-azeotropically; 2. I-DMAPN efunyenwe nge-distillation kwisinyathelo sokuqala i-catalytically hydrogenated phantsi kweemeko zoxinzelelo oluphezulu. Ukulungiswa kwe-DMPA

Kwinqanaba lesibini le-hydrogenation ukulungiselela i-DMPA, ukusabela kwecala kuya kwenzeka. Iimveliso eziphumayo zolu tshintsho ikakhulu yi-amine bis-DMPA kunye ne-tertiary amine tri-DMPA. Okwangoku, imveliso yasekhaya ye-DMPA ithatha i-kettle reaction, kwaye i-hydrogenation catalyst yi-powder nickel ye-Raney. Ukuze ucinezele ukubunjwa kwale mveliso, kuyimfuneko ukongeza i-12% -16% ye-catalyst mass ye-caustic alkali isisombululo se-aqueous okanye i-ammonia engamanzi, isisombululo se-alkali esinamanzi kunye ne-ammonia yolwelo Ukusetyenziswa kuya kuvelisa isixa esikhulu se-alkali. amanzi amdaka kunye nolwelo olulahlwayo, okunzima ukuthotywa kunye nokusebenza, ukwandisa umthwalo we-post-processing.

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