Noj xim- kho tus neeg sawv cev Y ua piv txwv: Ib qho ntsuas ntawm dicyandiamide tau ntxiv rau qhov qub- lub tshuab hluav taws xob siab thiab cua sov kom yaj. Tom qab ntawd, ntsuas tus nqi ntawm formaldehyde tov yog maj mam ntxiv dropwise rau lub reactor thaum tsis tu ncua stirring. Thaum kawg, ammonium chloride yog siv rau neutralization, uas ua rau lub pob tshab, viscous kua nrog ib tug tej yam khoom, uas yog cov khoom tiav. Txoj kev no tsim cov formaldehyde- muaj xim- kho tus neeg sawv cev, uas muaj cov xim zoo- kho cov nyhuv tab sis raug kev txom nyem los ntawm cov pa phem dawb formaldehyde, thiab nws siv yog txwv tsis pub siv ntau yam khoom.
Piv txwv ntawm formaldehyde- xim dawb- kho tus neeg sawv cev: Cov tshuaj aqueous ntawm diethylenetriamine los yog triethylenetetramine yog ntxiv rau lub reactor thiab rhuab thiab nplawm. Ib qho kev ntsuas ntawm epichlorohydrin yog ntxiv dropwise, thiab qhov sib tov yog khaws cia ntawm qhov kub thiab txias nyob rau hauv reflux thiab nplawm kom txog thaum cov khoom yog daj ntseg daj, pob tshab, kua nplaum, uas yog cov khoom kawg.
