I-Ethylene Diamine Tetraacetic Acid Disodium (EDTA Na2)
Impahla: I-Ethylene Diamine Tetraacetic Acid Disodium (EDTA Na2)
I-# yeCAS: 6381-92-6
Ifomula: C10H14N2O8Na2.2H2O
Isisindo se-molecule: 372
Ifomula Yesakhiwo:
Ukusetshenziswa: Isebenza ku-detergent, i-adjuvant yokudaya, i-ejenti yokucubungula imicu, isengezo sezimonyo, isithasiselo sokudla, umanyolo wezolimo njll.
Imininingwane:
| Into | Okujwayelekile |
| Ukubukeka | Impushana Emhlophe |
| Ukuhlolwa (C10H14N2O8Na2.2H2O) | ≥99.0% |
| I-Plumbum(Pb) | ≤0.0005% |
| I-Ferrum(Fe) | ≤0.001% |
| I-Chloride(Cl) | ≤0.05% |
| I-sulfate (SO4) | ≤0.05% |
| PH(50g/L; 25℃) | 4.0-6.0 |
| Usayizi Wezinhlayiyana | ＜40mesh≥98.0% |
Isicelo:
I-EDTA 2NA iyi-ejenti eyinkimbinkimbi ebalulekile yokuhlanganisa ama-ion ensimbi nokuhlukanisa izinsimbi. Lo mkhiqizo usetshenziswa njengesixazululo sokulungisa ukufakwa kwe-bleaching sezinto ezinemibala ekhulayo kanye nokucutshungulwa, kanye nokudaya insizakalo, i-ejenti yokwelashwa kwefayibha, isithako sezimonyo, umuthi, ukudla, ukukhiqizwa kwe-microfertilizer yamakhemikhali ezolimo, i-anticoagulant yegazi, i-ejenti eyinkimbinkimbi, okokuhlanza, ukuqiniswa, irabha yokwenziwa, i-polymerization. umqalisi kanye ne-ejenti yokuhlaziya ubuningi bensimbi esindayo, njll. Kuhlelo lokuqala lokunciphisa ukuncishiswa kwe-SBR lwe-SBR polymerization, i-disodium EDTA isetshenziswa njengengxenye ye-ejenti esebenzayo, ikakhulukazi ekuhlanganiseni ama-ion ensimbi nokulawula izinga lokusabela kwe-polymerization.
Inqubo Yokukhiqiza:
1.Yengeza kancane kancane ingxube ye-sodium cyanide ne-formaldehyde kusisombululo esinamanzi se-ethylenediamine ngesilinganiso esithile, futhi udlulise umoya ku-85℃ ngaphansi kwengcindezi encishisiwe yokukhipha igesi ye-ammonia. Ngemva kokusabela, lungisa inani le-Ph libe ngu-4.5 nge-concentrated sulfuric acid, bese ukhipha umbala, ukuhlunga, ukugxila, ukucwebezela futhi uhlukanise, bese womisa ukuze uthole umkhiqizo oqediwe.
2. Hlanganisa u-100kg we-chloroacetic acid, i-100kg yeqhwa kanye ne-135kg ye-30% yesisombululo se-NaOH, engeza u-18kg we-83% ~ 84% ye-ethylenediamine ngaphansi kokugqugquzela, futhi uyigcine ku-15℃ ihora elingu-1. Kancane kancane engeza isixazululo se-NaOH esingu-30% kumaqoqo kuze kube i-reactant iba ne-alkaline, futhi uyigcine ekamelweni lokushisa u-12h. Shisisa ku-90℃, engeza ikhabhoni ecushiwe ukuze ukhiphe umbala. I-filtrate ilungiswa ku-4.5 Ph nge-hydrochloric acid futhi igxilwe futhi ihlungwe ku-90 ℃; i-filtrate iyapholiswa, ifakwe amakristalu, ihlukaniswe futhi igezwe, futhi yomiswe ku-70 ℃ ukuze kutholwe umkhiqizo oqediwe.
3.Kwenziwe isenzo se-ethylenediaminetetraacetic acid kanye nesisombululo se-sodium hydroxide: Ku-2L ye-reaction flask efakwe i-stirrer, engeza u-292g we-ethylenediaminetetraacetic acid namanzi angu-1.2L. Engeza u-200mL wesisombululo se-sodium hydroxide engu-30% ngaphansi kokunyakaziswa nokushisa kuze kuqedwe konke ukusabela. Engeza u-20% we-hydrochloric acid futhi unciphise ku-pH=4.5, ukushisa ku-90℃ futhi ugxilise, ukuhlunga. I-filtrate iyapholiswa futhi amakristalu ayaqina. Khipha futhi uhlukanise, geza ngamanzi acwecwe, wome ku-70℃, bese uthola umkhiqizo we-EDTA 2NA.
4.Engeza i-ethylenediaminetetraacetic acid namanzi ku-enameled reaction tank, engeza isisombululo se-sodium hydroxide ngaphansi kokugqugquzela, ukushisa kuze kube yilapho konke ukusabela, engeza i-hydrochloric acid ku-pH 4.5, ukushisa ku-90 ° C futhi ugxilise, ukuhlunga, i-filtrate ipholile, hlunga. amakristalu, geza ngamanzi, wome ku-70°C, futhi uthole i-EDTA 2NA.
