Ethylene Diamine Tetraacetic Acid Disodium (EDTA Na2)
Ngwa ahịa: Ethylene Diamine Tetraacetic Acid Disodium (EDTA Na2)
CAS #: 6381-92-6
Usoro: C10H14N2O8Na2.2H2O
Arọ molikula: 372
Usoro nhazi:
Na-eji: Ọdabara maka ncha, dyeing adjuvant, onye na-emepụta ihe maka eriri, ihe mgbakwunye ịchọ mma, mgbakwunye nri, fatịlaịza ugbo wdg.
Nkọwapụta:
| Ihe | Ọkọlọtọ |
| Ọdịdị | Ọcha ntụ ntụ |
| Nyocha (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 |
| Oke urughuru | 40 mesh≥98.0% |
Ngwa:
EDTA 2NA bụ ihe dị mkpa na-emekọ ihe ọnụ maka ịgbakwụnye ion metal na ikewa ọla. A na-eji ngwaahịa a eme ihe dị ka ihe ndozi maka ịcha ọcha maka ihe osise foto na-emepe emepe na nhazi, yana inye enyemaka, onye na-ahụ maka ọgwụgwọ eriri, mgbakwunye ịchọ mma, ọgwụ, nri, mmepụta microfertilizer kemịkalụ, ọgwụ mgbochi ọbara, onye na-ahụ maka mgbagwoju anya, ncha, stabilizer, roba sịntetik, polymerization initiator na arọ metal quantitative analysis, wdg. A na-eji EDTA dị ka akụkụ nke onye na-arụ ọrụ, tumadi maka ịgbakwụnye ion ígwè na ịchịkwa ọnụego mmeghachi omume polymerization.
Usoro mmepụta:
1.Slowly tinye ngwakọta nke sodium cyanide na formaldehyde na mmiri mmiri ngwọta nke ethylenediamine na a ụfọdụ ruru, na-agafe ikuku na 85 ℃ n'okpuru belatara nrụgide wepụ amonia gas. Mgbe mmeghachi omume ahụ gasịrị, dozie uru Ph na 4.5 yana sulfuric acid gbadoro ụkwụ, wee dezie agba, nzacha, tinye uche, kristal na kewapụ, wee kpọọ nkụ iji nweta ngwaahịa emechara.
2.Mix 100kg nke chloroacetic acid, 100kg nke ice na 135kg nke 30% NaOH ngwọta, tinye 18kg nke 83% ~ 84% ethylenediamine n'okpuru edemede, ma debe ya na 15 ℃ maka 1h. Jiri nwayọọ tinye 30% NaOH ngwọta na batches ruo mgbe reactant ghọrọ alkaline, ma debe ya na ụlọ okpomọkụ maka awa 12. Kpoo ọkụ ruo 90 ℃, gbakwunye carbon na-arụ ọrụ ka ọ gbanwee agba. A na-edozi nzacha ahụ ka ọ bụrụ 4.5 Ph na hydrochloric acid ma tinye uche na nzacha na 90 ℃; A na-eme ka nzacha ahụ dị mma, kristal, kewapụ ya ma saa ya, ma kpoo ya na 70 ℃ iji nweta ngwaahịa a rụchara.
3.Mere site na omume nke ethylenediaminetetraacetic acid na sodium hydroxide ngwọta: Na 2L mmeghachi omume flask nke a kwadebere na ihe na-akpali akpali, tinye 292g ethylenediaminetetraacetic acid na 1.2L mmiri. Tinye 200mL nke 30% sodium hydroxide ngwọta n'okpuru mkpali na kpoo ruo mgbe mmeghachi omume niile gwụchara. Tinye 20% hydrochloric acid na neutralize na pH = 4.5, kpoo ruo 90 ℃ ma tinye uche, nyo. A na-eme ka nzacha ahụ dị mma na kristal na-ebuli elu. Wepụta ma kewapụ, sachaa na mmiri distilled, kpoo na 70 ℃, wee nweta ngwaahịa EDTA 2NA.
4.Add ethylenediaminetetraacetic acid na mmiri na enameled mmeghachi omume tank, tinye sodium hydroxide ngwọta n'okpuru edemede, okpomọkụ ruo mgbe niile mmeghachi omume, tinye hydrochloric acid ka pH 4.5, okpomọkụ na 90 Celsius C na itinye uche, nyo, filtrate na mma, na-nyocha kristal, na-asacha na mmiri, akọrọ na 70 °TA C, na nweta .
