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 avea ma vaifofo faʻapipiʻiina mo lanu ata o mea e atiaʻe ma faʻagaioiina, ma valiina fesoasoani, fiber treatment agent, cosmetic additive, vailaʻau, meaʻai, faʻatoʻaga vailaʻau microfertilizer gaosiga, toto anticoagulant, complexing agent, detergent, stabilizer, synthetic rubber, polymerization initiator ma u'amea mamafa su'esu'e su'esu'ega, ma isi. I le chlorinated fa'aitiitiga amata faiga mo SBR polymerization, disodium EDTA o lo'o fa'aaogaina e avea o se vaega o le sui malosi, e masani lava mo le fa'alavelaveina o ion u'amea ma le pulea o le fua o le tali polymerization.
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 faʻavevesi, vevela seia oʻo i le tali uma, faʻaopopo le hydrochloric acid i le pH 4.5, vevela i le 90 ° C ma le faʻamalosi, faamama, faʻamalulu le filtrate, faamama ese. tioata, fufulu i le vai, mago i le 70 ° C, ma maua EDTA 2NA.
