Ethylene Diamine Tetraacetic Acid Disodium (EDTA Na2)
Badeecada: Ethylene Diamine Tetraacetic Acid Disodium (EDTA Na2)
CAS #: 6381-92-6
Formula: C10H14N2O8Na2.2H2O
Miisaanka molecular: 372
Qaab-dhismeedka:
Isticmaala: Lagu dabaqi karo saabuunta, dheehiyaha dheeha, wakiilka farsamaynta ee fiilooyinka, wax lagu daro, cuntada lagu daro, bacriminta beeraha iwm.
Tilmaamaha:
| Shayga | Heerka |
| Muuqashada | Budada Cad |
| Asay (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 |
| Cabbirka Qaybaha | 40 mesh≥98.0% |
Codsiga:
EDTA 2NA waa walax muhiim ah oo isku dhafan oo loogu talagalay isku-dhafka ion birta iyo kala-soocidda biraha. Alaabtan waxa loo isticmaalaa sida bleaching xal hagaajinta wax sawiro midabka horumarinta iyo farsamaynta, iyo dheehidda caawiye, wakiilka daawaynta fiber, lagu daro la isku qurxiyo, daawada, cuntada, wax soo saarka microfertilizer kiimiko beeraha, anticoagulant dhiigga, wakiilka adag, saabuun, stabilizer, caag synthetic, polymerization initiator iyo biraha culus ee falanqaynta chloriti, iwm. EDTA waxaa loo isticmaalaa qayb ka mid ah wakiilka firfircoon, badiyaa isku-dhafka ion birta iyo xakamaynta heerka falcelinta polymerization.
Habka wax soo saarka:
1. Si tartiib ah ugu dar isku dar ah sodium cyanide iyo formaldehyde si ay u xal aqueous ee ethylenediamine in ratio gaar ah, oo gudbi hawada at 85 ℃ hoos cadaadiska hoos u dhigi si meesha looga saaro gaaska ammonia. Falcelinta ka dib, ku hagaaji qiimaha Ph ilaa 4.5 oo leh sulfuric acid oo xoogaysan, ka dibna midab ka bixi, shaandhee, xooga saar, crystallize oo kala saar, oo engegan si aad u hesho alaabta dhammaatay.
2. Isku qas 100kg oo chloroacetic acid, 100kg oo baraf ah iyo 135kg oo ah 30% NaOH xal, ku dar 18kg of 83%~84% ethylenediamine hoos walaaqda, oo ku hay 15℃ 1 saac. Si tartiib ah ugu dar 30% NaOH xal dufcad ah ilaa fal-celiyuhu noqdo alkaline, oo ku hay heerkulka qolka 12 saacadood. Kuleyl ilaa 90℃, ku dar kaarboon firfircoon si aad midab u kala saarto. Sifeynta waxaa lagu hagaajiyay 4.5 Ph oo leh hydrochloric acid waxaana la uruuriyay oo lagu sifeeyay 90 ℃; sifaynta waa la qaboojiyey, crystallized, la kala soocay oo la dhaqay, oo la qalajiyey at 70 ℃ si aad u hesho alaabta la dhammeeyey.
3.Made by ficilka ethylenediaminetetraacetic acid iyo sodium hydroxide xal: In 2L weel falcelin ah oo ku qalabaysan kiciya, ku dar 292g ethylenediaminetetraacetic acid iyo 1.2L biyo ah. Ku dar 200mL oo ah 30% sodium hydroxide xal ka hooseeya walaaq iyo kulayl ilaa dhammaan falcelinta ay dhammaato. Ku dar 20% hydrochloric acid oo dhexdhexaadiye pH=4.5, kuleyl ilaa 90℃ oo xooga saar, shaandheyn. Sifeynta waa la qaboojiyey oo kiristaalo ayaa soo da'ay. Soo saar oo kala saar, ku maydh biyo diirran, ku qalaji 70 ℃, oo hel badeecada EDTA 2NA.
4.Add ethylenediaminetetraacetic acid iyo biyaha taangiga falcelinta dhaldhalaalka ah, ku dar xal sodium hydroxide hoos walaaqaya, kulaylka ilaa dhammaan falcelinta, ku dar hydrochloric acid si pH 4.5, kulaylka 90 ° C iyo diiradda saarayaa, filter, filter waa la qaboojiyey, shaandhayso ka kiristaalo, ku dhaq biyo, qalalan at 70 ° C, NA .
