Ethylene Diamine Tetraacetic Acid Disodium (EDTA Na2)
Ngwaahịa: Ethylene Diamine Tetraacetic Acid Disodium (EDTA Na2)
CAS#: 6381-92-6
Usoro: C10H14N2O8Na2.2H2O
Ibu molekụla: 372
Usoro nhazi:
Ojiji: A na-etinye ya n'ọrụ nchacha, ihe na-eme ka agba dị nro, ihe na-eme ka eriri dị nro, ihe na-eme ka ọ dị mma, ihe na-eme ka nri dị nro, fatịlaịza ọrụ ugbo wdg.
Nkọwapụta:
| ihe | Ọkọlọtọ |
| Ọdịdị | Ntụ ntụ ọcha |
| Nnwale (C)10H14N2O8Na2.2H2O) | ≥99.0% |
| Plọmbum (Pb) | ≤0.0005% |
| Ferrọm (Fe) | ≤0.001% |
| Chloride (Cl) | ≤0.05% |
| Sulfate (SO2)4) | ≤0.05% |
| PH(50g/L; 25℃) | 4.0-6.0 |
| Nha nke ihe ndị dị ndụ | <40mesh≥98.0% |
Ngwa:
EDTA 2NA bụ ihe dị mkpa maka ime ka ion ígwè dị mgbagwoju anya na ikewapụ ọla dị iche iche. A na-eji ngwaahịa a dị ka ihe ngwọta maka ime ka ihe osise agba dị ọcha, na ihe enyemaka agba, ihe na-enye aka maka ọgwụgwọ eriri, ihe mgbakwunye ịchọ mma, ọgwụ, nri, mmepụta obere fatịlaịza kemịkalụ ugbo, ihe na-egbochi ọbara, ihe na-eme ka ihe dị mgbagwoju anya dị, ihe na-asa ahụ, ihe na-eme ka ihe sie ike, roba sịntetik, ihe na-eme ka polymerization malite na ihe na-eme ka ihe dị arọ dị arọ, wdg. Na sistemụ mmalite mbelata chlorinated maka polymerization SBR, a na-eji disodium EDTA dị ka ihe mejupụtara ihe na-arụ ọrụ, karịsịa maka ime ka ion ígwè dị mgbagwoju anya na ijikwa ọnụego mmeghachi omume polymerization.
Usoro Mmepụta:
1. Jiri nwayọ tinye ngwakọta sodium cyanide na formaldehyde na mmiri mmiri nke ethylenediamine n'otu oke, wee gafere ikuku na 85℃ n'okpuru nrụgide dị ala iji wepụ gas ammonia. Mgbe mmeghachi omume ahụ gasịrị, gbanwee uru Ph ka ọ bụrụ 4.5 na sulfuric acid a chịkọtara, wee gbanwee agba, nzacha, tinye uche, kristallize ma kewapụ, ma kpọọ nkụ iji nweta ngwaahịa emechara.
2. Gwakọta 100kg nke chloroacetic acid, 100kg nke ice na 135kg nke 30% nke mmiri NaOH, tinye 18kg nke 83% ~ 84% ethylenediamine ka ị na-akpali ya, ma debe ya na 15℃ maka awa 1. Jiri nwayọ tinye 30% nke mmiri NaOH n'ìgwè ruo mgbe ihe na-eme ka ọ bụrụ alkaline, ma debe ya na okpomọkụ ụlọ ruo awa 12. Kpoo ya ọkụ ruo 90℃, tinye carbon arụ ọrụ iji mee ka agba ya dị ọcha. A na-agbanwe mmiri ahụ ka ọ bụrụ 4.5 Ph na hydrochloric acid ma tinye ya n'ime mmiri ma kpochaa ya na 90℃; a na-eme ka mmiri ahụ dị jụụ, na-eme ka ọ dị ọcha, kewapụ ya ma saa ya, ma kpọọ nkụ na 70℃ iji nweta ngwaahịa emechara.
3. Emere ya site na ihe e ji ethylenediaminetetraacetic acid na sodium hydroxide mee ya: N'ime karama mmeghachi omume nke lita 2 nke nwere ihe na-akpali ya, tinye 292g ethylenediaminetetraacetic acid na mmiri lita 1.2. Tinye 200mL nke 30% sodium hydroxide n'okpuru mkpali ma kpoo ọkụ ruo mgbe mmeghachi omume niile gwụchara. Tinye 20% hydrochloric acid ma kewaa ya na pH = 4.5, kpoo ya ruo 90℃ ma tinye uche na ya, sachaa ya. A na-ajụ mmiri nzacha ahụ oyi ma tinye kristal n'ime ya. Wepụta ya ma kewapụ ya, jiri mmiri a gwakọtara agwakọta saa ya, kpọọ ya nkụ na 70℃, wee nweta ngwaahịa EDTA 2NA.
4. Tinye ethylenediaminetetraacetic acid na mmiri na tankị mmeghachi omume enamel, tinye mmiri sodium hydroxide mgbe ị na-akpali ya, kpoo ọkụ ruo mgbe mmeghachi omume niile gasịrị, tinye hydrochloric acid na pH 4.5, kpoo ọkụ ruo 90°C ma tinye uche, yochaa, a ga-ajụọ filtrate ahụ oyi, yochaa kristal ahụ, saa ya na mmiri, kpọọ nkụ na 70°C, wee nweta EDTA 2NA.
