Ethylene Diamine Tetraacetic Acid Disodium (EDTA Na2)
Mea kūʻai: Ethylene Diamine Tetraacetic Acid Disodium (EDTA Na2)
CAS#: 6381-92-6
Kumu: C10H14N2O8Na2.2H2O
Kaumaha molekula: 372
ʻO ke kumu hoʻohālike:
Hoʻohana: Hoʻohana ʻia i ka mea hoʻomaʻemaʻe, adjuvant dyeing, mea hana no nā fibers, cosmetic additive, meaʻai meaʻai, meaʻai meaʻai, etc.
Nā kikoʻī:
| 'ikamu | Kūlana |
| Ka nana aku | Pauda keʻokeʻo |
| ʻIke (C10H14N2O8Na2.2H2O) | ≥99.0% |
| Plumbum(Pb) | ≤0.0005% |
| Ferrum(Fe) | ≤0.001% |
| Klorida(Cl) | ≤0.05% |
| Sulfat(SO4) | ≤0.05% |
| PH(50g/L; 25 ℃) | 4.0-6.0 |
| Nui ʻāpana | ＜40 mesh≥98.0% |
Noi:
ʻO EDTA 2NA kahi mea hana paʻakikī koʻikoʻi no ka hoʻopili ʻana i nā ion metala a me ka hoʻokaʻawale ʻana i nā metala. Hoʻohana ʻia kēia huahana e like me ka bleaching fixing solution no ka hoʻomohala ʻana a me ka hoʻoponopono ʻana i nā mea kiʻi kala, a me ke kala ʻana i nā mea kōkua, fiber treatment agent, cosmetic additive, lāʻau lapaʻau, meaʻai, mahiʻai kemika microfertilizer production, koko anticoagulant, complexing agent, detergent, stabilizer, synthetic rubber, polymerization initiator and heavy metal quantitative analysis agent, etc. Hoʻohana ʻia ʻo EDTA ma ke ʻano he ʻāpana o ka mea hana, ka mea nui no ka hoʻopili ʻana i nā ion hao a me ka mālama ʻana i ka wikiwiki o ka hopena polymerization.
Kaʻina hana:
1. Hoʻohui mālie i ka hui ʻana o ka sodium cyanide a me ka formaldehyde i ka wai wai o ka ethylenediamine i kekahi lakio, a hele i ka ea ma 85 ℃ ma lalo o ke kaomi hoʻemi e wehe i ke kinoea amonia. Ma hope o ka hopena, e hoʻololi i ka waiwai Ph i 4.5 me ka sulfuric acid concentrated, a laila decolorize, kānana, hoʻopaʻa, crystallize a hoʻokaʻawale, a maloʻo e kiʻi i ka huahana i pau.
2.Mix 100kg o ka chloroacetic acid, 100kg o ka hau a me 135kg o 30% NaOH solution, e hoʻonui i ka 18kg o 83% ~ 84% ethylenediamine ma lalo o ka hoʻouluʻana, a mālama iā ia ma 15 ℃ no 1h. E hoʻohui mālie i ka solution 30% NaOH i loko o nā pūʻulu a hiki i ka lilo ʻana o ka reactant i alkaline, a mālama iā ia ma ka lumi wela no 12h. E wela i ka 90 ℃, e hoʻohui i ke kalapona i hana ʻia e decolorize. Hoʻoponopono ʻia ka filtrate i 4.5 Ph me ka waika hydrochloric a hoʻopaʻa ʻia a kānana ʻia ma 90 ℃; hoʻomaʻalili ʻia ka filtrate, crystallized, hoʻokaʻawale a holoi ʻia, a maloʻo ma 70 ℃ e loaʻa ai ka huahana i hoʻopau ʻia.
3. Hanaʻia e ka hana o ka ethylenediaminetetraacetic acid a me ka sodium hydroxide solution: I loko o ka pahu hopena 2L i hoʻolakoʻia me ka mea hoʻoulu, e hoʻonui i ka 292g ethylenediaminetetraacetic acid a me ka wai 1.2L. E hoʻohui i 200mL o 30% sodium hydroxide solution ma lalo o ka hoʻoulu ʻana a me ka wela a pau ka hopena. Hoʻohui i ka 20% hydrochloric acid a hoʻokaʻawale i ka pH = 4.5, wela i 90 ℃ a hoʻopaʻa, kānana. Hoʻomaʻalili ʻia ka kānana a hoʻoheheʻe ʻia nā kristal. Wehe a hoʻokaʻawale, holoi me ka wai maʻemaʻe, maloʻo ma 70 ℃, a loaʻa ka huahana EDTA 2NA.
4.Add ethylenediaminetetraacetic acid a me ka wai i ka enamel reaction tank, e hoʻohui i ka sodium hydroxide solution ma lalo o ka hoʻouluʻana, wela a hiki i ka hopena a pau, e hoʻohui i ka waiuma hydrochloric i ka pH 4.5, ka wela i ka 90 ° C a me ka concentrate, kānana, ua maʻalili ka filtrate, kānana i nā kristal, holoi me ka wai, maloʻo ma 70 EDTA .
