Ethylene Diamine Tetraacetic Acid Disodium (EDTA Na2)
Oloa: Ethylene Diamine Tetraacetic Acid Disodium (EDTA Na2)
CAS #: 6381-92-6
Fuafuaga: C10H14N2O8Na2.2H2O
Mole mole mamafa: 372
Fua Fa'atatau:
Fa'aoga: Fa'atatau i le fa'amama, vali vali, sui fa'agaioiga mo alava, mea fa'apipi'i teuteu, mea'ai fa'aopoopo, fa'ato'aga fa'ato'aga ma isi.
Fa'amatalaga:
| Aitema | Tulaga |
| Fa'aaliga | Pa'u Pa'epa'e |
| Su'ega(C10H14N2O8Na2.2H2O) | ≥99.0% |
| Plumbum(Pb) | ≤0.0005% |
| Ferrum(Fe) | ≤0.001% |
| Klorida(Cl) | ≤0.05% |
| Sulfate(SO4) | ≤0.05% |
| PH(50g/L; 25 ℃) | 4.0-6.0 |
| Lapo'a La'au | <40mesh≥98.0% |
Talosaga:
O le EDTA 2NA o se mea faʻapitoa faʻapitoa mo le faʻapipiʻiina o uʻamea uʻamea ma le vavaeeseina o metala. O lenei oloa o loʻo faʻaaogaina e pei o le faʻapipiʻiina o vaifofo mo le faʻaogaina o ata lanu ma le gaosiga, ma le valiina o fesoasoani, fiber treatment agent, cosmetic additive, vailaʻau, meaʻai, faʻatoʻaga vailaʻau microfertilizer gaosiga, toto anticoagulant, complexing agent, detergent, stabilizer, synthetic rubber, polymerization initiator and heavy metal quantitative analysis agent, etc. O le EDTA o loʻo faʻaaogaina e avea o se vaega o le sui malosi, aemaise lava mo le faʻalavelaveina o ion uʻamea ma le puleaina o le fua o le polymerization tali.
Gaosiga Fa'agasologa:
1. Faʻaopoopo lemu le paluga o le sodium cyanide ma formaldehyde i le vaifofo vai o le ethylenediamine i se fua faʻatatau, ma pasi le ea i le 85 ℃ i lalo o le faʻaitiitia o le mamafa e aveese ai le kasa amonia. A maeʻa le tali, fetuutuunai le tau o le Ph i le 4.5 faʻatasi ai ma le sulfuric acid faʻapitoa, ona faʻamalo, faamama, faʻaoga, tioata ma vavae ese, ma faʻagogo e maua ai le oloa maeʻa.
2. Faʻafefiloi 100kg o le chloroacetic acid, 100kg o le aisa ma le 135kg o le 30% NaOH solution, faʻaopoopo le 18kg o le 83% ~ 84% ethylenediamine i lalo o le faʻamalosi, ma tausia i le 15 ℃ mo le 1h. Fa'aopoopo lemu le vaifofo o le NaOH 30% i fa'aputuga se'ia o'o ina alkaline le mea fa'afefe, ma tu'u i le vevela o le potu mo le 12h. Fa'avevela i le 90 ℃, fa'aopoopo i ai le kaponi fa'agaoioi e fa'aleaga lanu. O le filtrate e fetuutuunai i le 4.5 Ph ma le hydrochloric acid ma faʻapipiʻi ma faʻamamaina i le 90 ℃; o le filtrate e malulu, tioata, vavae ese ma fufulu, ma faʻamago i le 70 ℃ e maua ai le oloa maeʻa.
3. Faia e le gaioiga o le ethylenediaminetetraacetic acid ma le sodium hydroxide solution: I totonu o se fagu tali 2L ua faʻapipiʻiina i se faʻamalosi, faʻaopopo le 292g ethylenediaminetetraacetic acid ma le 1.2L vai. Fa'aopopo le 200mL ole 30% ole vaifofo ole sodium hydroxide i lalo ole fa'aoso ma fa'avevela seia mae'a uma le tali. Fa'aopopo le 20% hydrochloric acid ma fa'ate'a i le pH=4.5, vevela i le 90 ℃ ma fa'amamafa, faamama. E mālūlū le su'ega ma fa'afefeteina tioata. Aveese ma vavae ese, fufulu ile vai faʻamago, faʻamago ile 70℃, ma maua le oloa EDTA 2NA.
4. Faʻaopoopo le ethylenediaminetetraacetic acid ma le vai i le tane faʻafefe enameled, faʻaopopo le sodium hydroxide solution i lalo o le faʻamalosi, vevela seia oʻo i le tali uma, faʻaopopo le hydrochloric acid i le pH 4.5, vevela i le 90 ° C ma faʻamaʻaʻaina, faamama, faʻamalulu le filtrate, faʻamama tioata, fufulu i le vai, faʻamago i le 70 EDTA ° C, faʻamago i le 70 ° C ma le NA.
