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 |
| Ka nui o ka ʻāpana | ＜40 mesh≥98.0% |
Noi:
ʻO EDTA 2NA he 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 kiʻi kiʻi kala, a me ke kala ʻana i nā mea kōkua, fiber treatment agent, cosmetic additive, lāʻau lapaʻau, meaʻai, meaʻai microfertilizer hana mahiʻai, anticoagulant koko, complexing agent, detergent, stabilizer, synthetic rubber, polymerization mea hoʻomaka a me ke kaumaha metala quantitative anamanaʻo luna, etc. I loko o ka chlorinated ho'ēmi hoʻomaka'ōnaehana no ka SBR polymerization, disodium EDTA hoʻohana 'ia ma ke ano he mea o ka mea hana, nui no ka complexing hao ion a me ka hoomalu ana i ka helu o ka polymerization pane.
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 hoʻopau ke kala. 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 enameled reaction tank, hoʻohui i ka sodium hydroxide solution ma lalo o ka hoʻouluʻana, wela a hiki i ka hopena a pau, e hoʻonui i ka waiuma hydrochloric i ka pH 4.5, ka wela i ka 90 ° C a me ka concentrate, kānana, hoʻomaʻamaʻa ka filtrate, kānana i waho. nā kristal, holoi me ka wai, maloʻo ma 70 ° C, a loaʻa iā EDTA 2NA.
