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 xal bleaching hagaajinta walxaha sawir midabka horumarinta iyo farsamaynta, iyo dheehidda kaabayaal ah, wakiilka daawaynta fiber, wax lagu daro, dawooyinka, cuntada, wax soo saarka microfertilizer kiimiko beeraha, xinjirowga lidka ku ah dhiigga, wakiilka kakafay, saabuun, xasiliye, caag synthetic, polymerization. Initiator iyo wakiilka falanqaynta tirooyinka birta culus, iwm. Nidaamka bilawga dhimista koloriinta ee loogu talagalay polymerization SBR, disodium EDTA waxaa loo isticmaalaa qayb ka mid ah wakiilka firfircoon, badiyaa isku-dhafka ions 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.Ku dar ethylenediaminetetraacetic acid iyo biyaha taangiga falcelinta dhaldhalaalka ah, ku dar xalinta sodium hydroxide hoos walaaqda, kulaylka ilaa dhammaan falcelinta, ku dar hydrochloric acid pH 4.5, kulaylka 90 ° C oo xooga saar, shaandheyn, shaandheynta waa la qaboojiyey, shaandheyn crystals, ku dhaq biyo, ku qalaji 70°C, oo hel EDTA 2NA.
