Ethylene Diamine Tetraacetic Acid disodium (EDTA Na2)
Chigadzirwa: Ethylene Diamine Tetraacetic Acid disodium (EDTA Na2)
CAS#: 6381-92-6
Formula: C10H14N2O8Na2.2H2O
Uremu hwemorekuru: 372
Structural Formula:
Zvishandiso: Inoshanda kune detergent, dhayi adjuvant, kugadzirisa agent yefibers, cosmetic additive, yekuwedzera chikafu, yekurima fetereza nezvimwe.
Zvinodiwa:
| Item | Standard |
| Chitarisiko | White Powder |
| Kuongorora (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 |
| Particle Size | ＜40mesh≥98.0% |
Application:
EDTA 2NA chinhu chakakosha chekugadzirisa simbi simbi uye kupatsanura simbi. Ichi chigadzirwa chinoshandiswa se bleaching kugadzirisa mhinduro yeruvara rwemifananidzo kugadzirwa uye kugadzirwa, uye dhayi rinobatsira, faibha kurapwa agent, cosmetic additive, mushonga, chikafu, yekurima makemikari microfertilizer kugadzirwa, ropa anticoagulant, complexing agent, detergent, stabilizer, synthetic rubber, polymerization initiator uye heavy metal quantitative analysis in the SBR polymerization, disodium EDTA inoshandiswa sechikamu cheiyo inoshanda mumiriri, kunyanya kuomesa simbi ions uye kudzora chiyero chepolymerization reaction.
Kugadzira Maitiro:
1.Zvishoma nezvishoma wedzera musanganiswa we sodium cyanide uye formaldehyde kune aqueous solution ye ethylenediamine mune imwe chiyero, uye pfuura mhepo pa85 ℃ pasi pekuderedza kuderedzwa kubvisa ammonia gasi. Mushure mekuita, gadzirisa kukosha kwePh kusvika 4.5 ine concentrated sulfuric acid, uye wobva waita decolorize, sefa, concentrate, crystallize uye patsanura, uye woomesa kuti uwane chigadzirwa chapera.
2.Sanganisa 100kg ye chloroacetic acid, 100kg yechando uye 135kg ye30% NaOH mhinduro, wedzera 18kg ye83% ~ 84% ethylenediamine pasi pekukurudzira, uye chengetedza pa15 ℃ kwe1h. Zvishoma nezvishoma wedzera 30% mhinduro yeNaOH mumabhechi kusvika reactant yaita alkaline, uye chengeta pamhepo tembiricha kwe12h. Kupisa kusvika 90 ℃, wedzera activated kabhoni kuti decolorize. Iyo filtrate inogadziriswa ku4.5 Ph ine hydrochloric acid uye yakadzika uye yakasefa pa90 ℃; iyo filtrate yakatonhodzwa, yakanatswa, yakapatsanurwa uye yakagezwa, uye yakaomeswa pa70 ℃ kuti iwane chigadzirwa chakapedzwa.
3.Yakagadzirwa nekuita kwe ethylenediaminetetraacetic acid uye sodium hydroxide solution: Mu 2L reaction flask yakashongedzerwa ne-stirrer, wedzera 292g ethylenediaminetetraacetic acid uye 1.2L mvura. Wedzera 200mL ye30% sodium hydroxide solution pasi pekudzvinyirirwa uye kupisa kusvika mhinduro yese yapera. Wedzera 20% hydrochloric acid uye shandura kusvika pH = 4.5, kupisa kusvika 90 ℃ uye simbisa, sefa. Iyo filtrate inotonhorera uye makristasi anonaya. Bvisa uye patsanura, geza nemvura yakasvibiswa, yakaoma pa70 ℃, uye tora chigadzirwa EDTA 2NA.
4.Wedzera ethylenediaminetetraacetic acid nemvura kune enameled reaction tank, wedzera sodium hydroxide solution pasi pekukurudzira, kupisa kusvikira zvose zvaitwa, wedzera hydrochloric acid kusvika pH 4.5, kupisa kusvika ku90 ° C uye kuisa pfungwa, filtrate, filtrate inotonhora, tsvina kunze kwemakristasi, suka nemvura, yakaoma uye kuwana 70 ° C EDTA.
