Ethylene Diamine Tetraacetic Acid Disodium (EDTA Na2)
Thepa: Ethylene Diamine Tetraacetic Acid Disodium (EDTA Na2)
CAS #: 6381-92-6
Foromo: C10H14N2O8Na2.2H2O
Boima ba molek'hule: 372
Foromo ea Sebopeho:
Litšebeliso: E sebetsa ho sesepa, ho daea adjuvant, sesebelisoa sa ho sebetsa bakeng sa likhoele, setlolo sa litlolo, se eketsang lijo, manyolo a temo jj.
Litlhaloso :
| Ntho | Standard |
| Ponahalo | Phofo e Tshweu |
| Tlhahlobo (C10H14N2O8Na2.2H2O) | ≥99.0% |
| Plumbum(Pb) | ≤0.0005% |
| Ferrum(Fe) | ≤0.001% |
| Chloride(Cl) | ≤0.05% |
| Sulfate (SO4) | ≤0.05% |
| PH(50g/L; 25℃) | 4.0-6.0 |
| Boholo ba Karolo | ＜40mesh≥98.0% |
Kopo:
EDTA 2NA ke ntho ea bohlokoa ea ho kopanya li-ion tsa tšepe le ho arola litšepe. Sehlahisoa sena se sebelisoa e le tharollo ea ho lokisa bleaching bakeng sa lisebelisoa tsa mebala ea lifoto tse ntseng li tsoela pele le ho sebetsa, le ho daea ho thusa, moemeli oa phekolo ea fiber, motsoako oa litlolo, meriana, lijo, tlhahiso ea lik'hemik'hale tsa temo ea microfertilizer, mali a anticoagulant, agent ea complexing, detergent, stabilizer, rabara ea maiketsetso, polymerization initiator le heavy metal quantitative analysis in the SBR polymerization, disodium EDTA e sebelisoa e le karolo ea ntho e sebetsang, haholo-holo bakeng sa ho kopanya li-ion tsa tšepe le ho laola sekhahla sa ho arabela ha polymerization.
Mokhoa oa Tlhahiso:
1. Butle-butle eketsa motsoako oa sodium cyanide le formaldehyde ho tharollo ea metsi ea ethylenediamine ka tekanyo e itseng, 'me u fetise moea ho 85 ℃ tlas'a khatello e fokotsehileng ea ho tlosa khase ea ammonia. Ka mor'a karabelo, fetola boleng ba Ph ho 4.5 ka concentrated sulfuric acid, 'me joale decolorize, filter, concentrate, crystallize le ho arohana,' me u omelle ho fumana sehlahisoa se felileng.
2. Kopanya 100kg ea chloroacetic acid, 100kg ea leqhoa le 135kg ea 30% ea tharollo ea NaOH, eketsa 18kg ea 83% ~ 84% ethylenediamine tlas'a ho sisinyeha, 'me ue boloke ho 15℃ bakeng sa 1h. Butle-butle eketsa tharollo ea 30% ea NaOH ka lihlopha ho fihlela reactant e fetoha alkaline, 'me e boloke mocheso oa kamore bakeng sa 12h. Mocheso ho isa ho 90 ℃, eketsa khabone e kentsoeng ho senya mebala. Filtrate e fetotsoe ho 4.5 Ph ka hydrochloric acid mme e tsepamisitsoe le ho hloekisoa ho 90 ℃; filtrate e pholile, e hloekisitsoe, e arotsoe ebe e hlatsuoa, 'me e omisitsoe ho 70 ℃ ho fumana sehlahisoa se felileng.
3.E entsoe ka ketso ea ethylenediaminetetraacetic acid le sodium hydroxide solution: Ka botlolo ea 2L reaction e nang le moferefere, eketsa 292g ethylenediaminetetraacetic acid le 1.2L metsi. Kenya 200mL ea 30% ea tharollo ea sodium hydroxide tlas'a ho tsosoa le mocheso ho fihlela karabelo eohle e felile. Kenya 20% hydrochloric acid 'me u fokotsehe ho pH=4.5, mocheso ho 90 ℃ 'me u tsepamise maikutlo, sefa. Filtrate e pholile, 'me likristale lia theoha. Ntša le ho arola, hlatsoa ka metsi a hloekisitsoeng, o omme ho 70 ℃, 'me u fumane sehlahisoa EDTA 2NA.
4.Eketsa ethylenediaminetetraacetic acid le metsi ho tanka ea enameled reaction, eketsa tharollo ea sodium hydroxide tlas'a ho hlohlelletsa, mocheso ho fihlela karabelo eohle, eketsa hydrochloric acid ho pH 4.5, mocheso ho 90 ° C le ho tsepamisa mohopolo, filthara, filtrate e pholile, e hloekisa ka ntle ho likristale, hlatsoa ka metsi, e omeletseng le ho fumana 70 °C EDTA 70 ° C.
