I-Ethylene Diamine Tetraacetic Acid Disodium (EDTA Na2)
Impahla: I-Ethylene Diamine Tetraacetic Acid Disodium (EDTA Na2)
Inombolo ye-CAS: 6381-92-6
Ifomula: C10H14N2O8Na2.2H2O
Isisindo sama-molecule: 372
Ifomula Yesakhiwo:
Ukusetshenziswa: Kusebenza ekuhlanzeni, isithasiselo sokudaya, i-ejenti yokucubungula imicu, isithasiselo sezimonyo, isithasiselo sokudla, umanyolo wezolimo njll.
Imininingwane:
| Into | Okujwayelekile |
| Ukubukeka | Impuphu Emhlophe |
| Ukuhlolwa (C)10H14N2O8Na2.2H2O) | ≥99.0% |
| I-Plumbum(Pb) | ≤0.0005% |
| I-Ferrum(Fe) | ≤0.001% |
| I-Chloride (Cl) | ≤0.05% |
| I-Sulfate (SO2)4) | ≤0.05% |
| PH(50g/L; 25℃) | 4.0-6.0 |
| Usayizi Wezinhlayiya | ＜40mesh≥98.0% |
Isicelo:
I-EDTA 2NA iyi-ejenti ebalulekile yokuhlanganisa ama-ion ensimbi nokuhlukanisa izinsimbi. Lo mkhiqizo usetshenziswa njengesixazululo sokulungisa ukufiphaza kwezinto zombala ezithuthukisa futhi zicutshungulwe, kanye nokusiza ukudaya, i-ejenti yokwelapha i-fiber, isithasiselo sezimonyo, imithi, ukudla, ukukhiqizwa kwe-microfertilizer yamakhemikhali ezolimo, i-anticoagulant yegazi, i-ejenti yokuhlanganisa, insipho, isiqinisi, irabha yokwenziwa, i-polymerization initiator kanye ne-ejenti yokuhlaziya inani lensimbi esindayo, njll. Ohlelweni lokuqalisa lokunciphisa i-chlorine lwe-SBR polymerization, i-disodium EDTA isetshenziswa njengengxenye ye-ejenti esebenzayo, ikakhulukazi yokuhlanganisa ama-ion ensimbi nokulawula izinga lokusabela kwe-polymerization.
Inqubo Yokukhiqiza:
1. Faka kancane kancane ingxube ye-sodium cyanide kanye ne-formaldehyde esixazululweni samanzi se-ethylenediamine ngesilinganiso esithile, bese udlulisa umoya ku-85℃ ngaphansi kwengcindezi encishisiwe ukuze ususe igesi ye-ammonia. Ngemva kokusabela, lungisa inani le-Ph libe ngu-4.5 nge-sulfuric acid egxilile, bese ususa umbala, uhlunge, ugxilise, ucwebe bese uhlukanisa, bese womisa ukuze uthole umkhiqizo oqediwe.
2. Hlanganisa i-100kg ye-chloroacetic acid, i-100kg yeqhwa kanye ne-135kg yesisombululo se-NaOH esingu-30%, engeza i-18kg ye-ethylenediamine engu-83% ~ 84% ngaphansi kokuxubha, bese uyigcina ku-15℃ ihora eli-1. Engeza kancane kancane isixazululo se-NaOH esingu-30% ngamaqoqo kuze kube yilapho i-reactant iba yi-alkaline, bese uyigcina ekushiseni kwegumbi amahora ayi-12. Shisa ku-90℃, engeza i-activated carbon ukuze ishintshe umbala. I-filtrate ilungiswa ku-4.5 Ph nge-hydrochloric acid bese igxiliswa futhi ihlungwe ku-90℃; i-filtrate iyapholiswa, icwebezelwe, ihlukaniswe futhi igezwe, bese yomiswa ku-70℃ ukuze uthole umkhiqizo oqediwe.
3. Kwenziwe ngesenzo sesisombululo se-ethylenediaminetetraacetic acid kanye ne-sodium hydroxide: Ebhodleleni lokusabela elingu-2L elihlonyiswe nge-stirrer, engeza i-292g ye-ethylenediaminetetraacetic acid kanye namanzi angu-1.2L. Engeza isixazululo se-sodium hydroxide esingu-200mL esingu-30% ngaphansi kokuxuba bese ushisa kuze kube yilapho konke ukusabela sekuqediwe. Engeza i-20% ye-hydrochloric acid bese uyinciphisa ibe yi-pH=4.5, uyishise ibe yi-90℃ bese uyigxilisa, uyihlunge. I-filtrate iyaphola bese amakristalu ayavuvukala. Khipha bese uhlukanisa, ugeze ngamanzi acwengekile, womise ku-70℃, bese uthola umkhiqizo i-EDTA 2NA.
4. Faka i-ethylenediaminetetraacetic acid namanzi ethangini lokusabela elihlanganisiwe, engeza isisombululo se-sodium hydroxide ngaphansi kokuxubha, shisa kuze kube yilapho yonke impendulo iphela, engeza i-hydrochloric acid ku-pH 4.5, shisa ku-90°C bese ugxila, uhlunge, i-filtrate ipholile, hlunga amakristalu, ugeze ngamanzi, womise ku-70°C, bese uthola i-EDTA 2NA.
