I-Ethylene Diamine Tetraacetic Acid disodium (EDTA Na2)
Imveliso: I-Ethylene Diamine Tetraacetic Acid disodium (EDTA Na2)
CAS #: 6381-92-6
Ifomula: C10H14N2O8Na2.2H2O
Ubunzima bemolekyuli: 372
Ifomula yoLwakhiwo:
Ukusetyenziswa: Isebenza kwi-detergent, i-adjuvant yokudaya, i-ejenti yokucubungula iifayibha, isongezo sokuthambisa, isongezo sokutya, isichumiso sezolimo njl.njl.
Iinkcukacha :
| Into | Umgangatho |
| Imbonakalo | Umgubo oMhlophe |
| Isivavanyi (C10H14N2O8Na2.2H2O) | ≥99.0% |
| Plumbum(Pb) | ≤0.0005% |
| Ferrum(Fe) | ≤0.001% |
| Ikloridi(Cl) | ≤0.05% |
| Sulfate (SO4) | ≤0.05% |
| PH(50g/L; 25℃) | 4.0-6.0 |
| Ubungakanani beNcam | ＜40mesh≥98.0% |
Isicelo:
I-EDTA 2NA yi-agent eyinkimbinkimbi ebalulekileyo yokwenza i-ion zetsimbi kunye nokwahlula iintsimbi. Le mveliso isetyenziswa njengesisombululo sokulungiswa kwe-bleaching kumbala wezinto ezifotayo kunye nokuphuhliswa, kunye nokudaya okuncedisayo, i-agent yonyango lwefayibha, i-cosmetic additive, iyeza, ukutya, imveliso yezolimo yemichiza ye-microfertilizer, i-anticoagulant yegazi, i-agent edibeneyo, i-detergent, i-stabilizer, irabha yokwenziwa, i-polymerization. umqalisi kunye ne-agent ye-heavy metal quantitative analysis, njl. Kwinkqubo yokuqaliswa kokunciphisa i-chlorinated kwi-polymerization ye-SBR, i-disodium EDTA isetyenziswe njengenxalenye ye-agent esebenzayo, ngokukodwa ukudibanisa i-ion zensimbi kunye nokulawula izinga lokuphendula kwe-polymerization.
Inkqubo yeMveliso:
I-1.Yongeza ngokukhawuleza umxube we-sodium cyanide kunye ne-formaldehyde kwisisombululo samanzi se-ethylenediamine kwisilinganiselo esithile, kwaye udlulise umoya kwi-85 ℃ phantsi koxinzelelo oluncitshisiweyo lokususa igesi ye-ammonia. Emva kokusabela, lungisa ixabiso le-Ph kwi-4.5 kunye ne-sulfuric acid egxininisiweyo, kwaye emva koko i-decolorize, ihluzo, igxininise, i-crystallize kwaye yahlule, kwaye yome ukufumana imveliso egqityiweyo.
2. Hlanganisa i-100kg ye-chloroacetic acid, i-100kg yeqhwa kunye ne-135kg ye-30% isisombululo se-NaOH, yongeza i-18kg ye-83% ~ 84% ye-ethylenediamine phantsi kokuvuselela, kwaye uyigcine kwi-15℃ nge-1h. Yongeza kancinane isisombululo se-30% se-NaOH kwiibhetshi de i-reactant ibe yi-alkaline, kwaye uyigcine kwindawo yokushisa ye-12h. Ubushushu ukuya kwi-90℃, yongeza ikhabhoni esebenzayo ukuze uguqule umbala. I-filtrate ilungelelaniswe kwi-4.5 Ph kunye ne-hydrochloric acid kwaye igxininise kwaye ihluzwe kwi-90 ℃; ifiltrate ipholile, icwecwe, yahlulwe kwaye ihlanjwe, kwaye yomiswe kwi-70 ℃ ukufumana imveliso egqityiweyo.
I-3.Yenziwe ngesenzo se-ethylenediaminetetraacetic acid kunye nesisombululo se-sodium hydroxide: Kwi-flask ye-2L yokuphendula exhotywe nge-stirrer, yongeza i-292g ethylenediaminetetraacetic acid kunye ne-1.2L yamanzi. Yongeza i-200mL ye-30% yesisombululo se-sodium hydroxide phantsi kokuvuselela kunye nobushushu de yonke impendulo igqitywe. Yongeza i-20% ye-hydrochloric acid kunye ne-neutralize kwi-pH = 4.5, ubushushu ukuya kwi-90 ℃ kwaye ugxininise, ukucoca. I-filtrate ipholile kwaye iikristale ziyaqina. Khipha kwaye uhlukanise, hlamba ngamanzi adibeneyo, wome kwi-70 ℃, kwaye ufumane imveliso ye-EDTA 2NA.
4.Yongeza i-ethylenediaminetetraacetic acid kunye namanzi kwi-enameled reaction tank, yongeza isisombululo se-sodium hydroxide phantsi kokuvuselela, ukushisa kuze kube yinto yonke yokusabela, yongeza i-hydrochloric acid kwi-pH 4.5, ukushisa ukuya kwi-90 ° C kwaye ugxininise, ukucoca, i-filtrate ipholile, ihluze ngaphandle. iikristale, hlamba ngamanzi, zome kwi-70 ° C, kwaye ufumane i-EDTA 2NA.
