Ethylene Diamine Tetraacetic Acid disodium (EDTA Na2)
Zofunika: Ethylene Diamine Tetraacetic Acid Disodium (EDTA Na2)
CAS #: 6381-92-6
Fomula: C10H14N2O8Na2.2H2O
Kulemera kwa molekyulu: 372
Structural Formula:
Ntchito: Yogwiritsidwa ntchito pa detergent, dyeing adjuvant, processing agent for fibers, cosmetic additive, chakudya chowonjezera, feteleza waulimi etc.
Zofotokozera:
| Kanthu | Standard |
| Maonekedwe | Ufa Woyera |
| Chiyembekezo (C10H14N2O8Na2.2H2O) | ≥99.0% |
| Plum (Pb) | ≤0.0005% |
| Ferrum (Fe) | ≤0.001% |
| Chloride (Cl) | ≤0.05% |
| Sulfate (SO4) | ≤0.05% |
| PH(50g/L; 25℃) | 4.0-6.0 |
| Tinthu Kukula | ＜40mesh≥98.0% |
Ntchito:
EDTA 2NA ndi chinthu chofunikira chopangira ma ion iron complexing ndi kulekanitsa zitsulo. Mankhwalawa amagwiritsidwa ntchito ngati bleaching fixing solution kwa mtundu wa zithunzi zomwe zikukula ndi kukonza, ndi utoto wothandiza, wothandizira CHIKWANGWANI, zowonjezera zodzikongoletsera, mankhwala, chakudya, ulimi wamankhwala a microfertilizer, magazi anticoagulant, wothandizila, detergent, stabilizer, mphira wopanga, polymerization. woyambitsa ndi heavy metal kachulukidwe kusanthula wothandizila, etc. Mu klorini kuchepetsa kuyambitsa dongosolo kwa SBR polymerization, disodium EDTA ntchito ngati chigawo chimodzi cha yogwira wothandizila, makamaka kwa complexing ayoni chitsulo ndi kulamulira mlingo wa polymerization anachita.
Ndondomeko Yopanga:
1.Pang'onopang'ono yonjezerani chisakanizo cha sodium cyanide ndi formaldehyde ku njira yamadzimadzi ya ethylenediamine mu chiŵerengero china, ndikudutsa mpweya pa 85 ℃ pansi pa kuchepetsa kupanikizika kuti muchotse mpweya wa ammonia. Pambuyo pazimenezi, sinthani mtengo wa Ph kukhala 4.5 ndi sulfuric acid wokhazikika, kenako decolorize, fyuluta, kuika maganizo, crystallize ndi kupatukana, ndi kuuma kuti mutenge chomaliza.
2. Sakanizani 100kg ya chloroacetic acid, 100kg ya ayezi ndi 135kg ya 30% yothetsera NaOH, onjezerani 18kg ya 83% ~ 84% ethylenediamine pansi pa kusonkhezera, ndikusunga pa 15 ℃ kwa 1h. Pang'onopang'ono onjezani yankho la 30% la NaOH m'magulu mpaka chokokeracho chikhala amchere, ndikusunga kutentha kwa 12h. Kutenthetsa mpaka 90 ℃, onjezani kaboni woyatsidwa kuti muchepetse. Sefayi imasinthidwa kukhala 4.5 Ph ndi hydrochloric acid ndikukhazikika ndikusefedwa pa 90 ℃; filtrate imakhazikika, yowunikiridwa, yolekanitsidwa ndikutsukidwa, ndikuwumitsidwa pa 70 ℃ kuti mupeze chomaliza.
3.Kupangidwa ndi zochita za ethylenediaminetetraacetic acid ndi sodium hydroxide solution: Mu 2L reaction botolo yokhala ndi chotsitsimutsa, onjezerani 292g ethylenediaminetetraacetic acid ndi 1.2L madzi. Onjezani 200mL ya 30% sodium hydroxide solution poyambitsa ndi kutentha mpaka zonse zitatha. Onjezani 20% hydrochloric acid ndikuchepetsa ku pH = 4.5, kutentha mpaka 90 ℃ ndikuyika, fyuluta. Filtrate imakhazikika ndipo makhiristo amawotchedwa. Chotsani ndikulekanitsa, sambani ndi madzi osungunuka, zouma pa 70 ℃, ndikupeza mankhwala EDTA 2NA.
4.Onjezani ethylenediaminetetraacetic acid ndi madzi ku thanki ya enameled reaction, onjezerani sodium hydroxide solution pansi pa kusonkhezera, kutentha mpaka zonse zomwe mukuchita, onjezerani hydrochloric acid ku pH 4.5, kutentha kwa 90 ° C ndi kuika maganizo, fyuluta, fyulutayo itakhazikika, fyuluta. makhiristo, sambani ndi madzi, zouma pa 70 ° C, ndikupeza EDTA 2NA.
