Ethylene Diamine Tetraacetic Acid Disodium (EDTA Na2)
Khoom Muag: Ethylene Diamine Tetraacetic Acid Disodium (EDTA Na2)
CAS#: 6381-92-6
Cov mis: C10H14N2O8Na2.2H2O
Qhov hnyav molecular: 372
Cov Qauv Qauv:
Siv: Siv rau cov tshuaj ntxuav tes, dyeing adjuvant, ua tus neeg sawv cev rau cov fibers, cov khoom siv pleev kom zoo nkauj, cov khoom noj khoom haus ntxiv, chiv ua liaj ua teb thiab lwm yam.
Cov Lus Qhia:
| Khoom | Tus Qauv |
| Qhov tsos | Hmoov Dawb |
| Kev Ntsuas (C10H14N2O8Na2.2H2O) | ≥99.0% |
| Plumbum (Pb) | ≤0.0005% |
| Hlau (Fe) | ≤0.001% |
| Chloride (Cl) | ≤0.05% |
| Sulfate (SO4)4) | ≤0.05% |
| PH (50g/L; 25℃) | 4.0-6.0 |
| Qhov Loj ntawm Cov Khoom Me Me | <40mesh≥98.0% |
Daim Ntawv Thov:
EDTA 2NA yog ib qho tseem ceeb rau kev sib xyaw cov hlau ions thiab kev sib cais cov hlau. Cov khoom no yog siv los ua cov tshuaj dawb rau kev tsim thiab ua cov khoom siv duab xim, thiab kev pabcuam dyeing, tus neeg sawv cev kho fiber, cov khoom siv ntxiv rau kev zoo nkauj, tshuaj, khoom noj, kev tsim cov tshuaj microfertilizer ua liaj ua teb, cov tshuaj tiv thaiv ntshav, tus neeg sawv cev sib xyaw, tshuaj ntxuav tes, stabilizer, roj hmab hluavtaws, tus neeg pib polymerization thiab tus neeg sawv cev ntsuas cov hlau hnyav, thiab lwm yam. Hauv lub kaw lus chlorinated reduction initiation rau SBR polymerization, disodium EDTA yog siv los ua ib feem ntawm tus neeg sawv cev nquag, feem ntau yog rau kev sib xyaw cov hlau ions thiab tswj qhov nrawm ntawm cov tshuaj tiv thaiv polymerization.
Txheej Txheem Tsim Khoom:
1. Maj mam ntxiv cov sodium cyanide thiab formaldehyde sib tov rau hauv cov kua dej ntawm ethylenediamine hauv ib qho piv txwv, thiab hla cua ntawm 85 ℃ hauv qab qhov siab txo qis kom tshem tawm cov pa ammonia. Tom qab ua tiav qhov kev tshuaj tiv thaiv, kho tus nqi Ph rau 4.5 nrog cov kua qaub sulfuric concentrated, thiab tom qab ntawd tshem tawm cov xim, lim, concentrate, crystallize thiab sib cais, thiab ziab kom tau txais cov khoom tiav.
2. Sib tov 100kg ntawm chloroacetic acid, 100kg ntawm dej khov thiab 135kg ntawm 30% NaOH kua, ntxiv 18kg ntawm 83% ~ 84% ethylenediamine hauv qab do, thiab khaws cia rau ntawm 15 ℃ rau 1 teev. Maj mam ntxiv 30% NaOH kua hauv cov khoom ua ke kom txog thaum cov reactant ua alkaline, thiab khaws cia rau ntawm chav tsev kub rau 12 teev. Sov rau 90 ℃, ntxiv cov pa roj carbon activated kom decolorize. Lub filtrate raug kho rau 4.5 Ph nrog hydrochloric acid thiab concentrated thiab lim ntawm 90 ℃; lub filtrate yog txias, crystallized, sib cais thiab ntxuav, thiab ziab ntawm 70 ℃ kom tau txais cov khoom tiav.
3. Ua los ntawm kev ua ntawm ethylenediaminetetraacetic acid thiab sodium hydroxide kua: Hauv lub raj mis tshuaj tiv thaiv 2L uas muaj lub stirrer, ntxiv 292g ethylenediaminetetraacetic acid thiab 1.2L dej. Ntxiv 200mL ntawm 30% sodium hydroxide kua hauv qab do thiab cua sov kom txog thaum tag nrho cov tshuaj tiv thaiv tiav. Ntxiv 20% hydrochloric acid thiab neutralize rau pH = 4.5, cua sov rau 90 ℃ thiab concentrate, lim. Lub filtrate txias thiab crystals yog precipitated. Extract thiab sib cais, ntxuav nrog dej distilled, qhuav ntawm 70 ℃, thiab tau txais cov khoom EDTA 2NA.
4. Ntxiv ethylenediaminetetraacetic acid thiab dej rau hauv lub tank enameled reaction, ntxiv sodium hydroxide kua hauv qab do, cua sov kom txog thaum tag nrho cov tshuaj tiv thaiv, ntxiv hydrochloric acid rau pH 4.5, cua sov rau 90 ° C thiab concentrate, lim, lub filtrate txias, lim tawm cov crystals, ntxuav nrog dej, qhuav ntawm 70 ° C, thiab tau txais EDTA 2NA.
