EDTA disodium paʻakai (EDTA 2NA), CAS#6381-92-6
Mea kūʻai: EDTA 2NA
CAS#: 6381-92-6
ʻAno Molekala: C10H14N2O8Na2.2H2O
Kaumaha molekula: 372
Hoʻohana: Hoʻohana ʻia i ka mea hoʻomaʻemaʻe, adjuvant dyeing, mea hana no nā fibers, cosmetic additive, meaʻai meaʻai, meaʻai meaʻai, etc.
Nā kikoʻī:
ʻAno: ʻO ka pauka keʻokeʻo a i ʻole ka pauka crystalline keʻokeʻo
ʻAla: ʻAʻohe ʻala
Klorida(Cl): ≤0.05%
Sulfate(SO4): ≤0.05%
Hao(Fe): ≤0.001%
Metala kaumaha (Pb): ≤0.001%
PH: 4-6
Maʻemaʻe: ≥99.0%
Ka helu hehee: 252 ℃
Solubility: hiki ke hoʻoheheʻe ʻia i ka wai, hiki ke hoʻoheheʻe ʻia i ka ethanol, etera.
Hoʻopili: 25KG / ʻeke
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 hana ʻana o 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 anana luna, etc. I loko o ka chlorinated reduction initiation nenoaiu no SBR polymerization, disodium EDTA hoʻohana 'ia ma ke 'ano he māhele o ka mea hana, nui no ka complexing hao ion a me ka hoomalu ana i ka nui o ka polymerization reaction.
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 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.
