Ethylene Diamine Tetraacetic Acid Disodium (EDTA Na2)
Chinhu Chinokosha: Ethylene Diamine Tetraacetic Acid Disodium (EDTA Na2)
Nhamba yeCAS: 6381-92-6
Fomura: C10H14N2O8Na2.2H2O
Kurema kwemamorekuru: 372
Formula yekuvaka:
Mashandisirwo: Inoshanda pakugadzira sipo, chinhu chinobatsira pakudhaya, chinhu chinoshandiswa pakugadzira machira, chinowedzera kumeso, chinowedzera chikafu, fetereza yekurima nezvimwewo.
Magadzirirwo:
| Chinhu | Zvakajairika |
| Chitarisiko | Upfu Huchena |
| Kuyedza (C)10H14N2O8Na2.2H2O) | ≥99.0% |
| Plumbum (Pb) | ≤0.0005% |
| Ferrum(Fe) | ≤0.001% |
| Chloride (Cl) | ≤0.05% |
| Sulfate (SO3)4) | ≤0.05% |
| PH(50g/L; 25℃) | 4.0-6.0 |
| Saizi yeChidimbu | 40mesh≥98.0% |
Kushanda:
EDTA 2NA chinhu chakakosha pakugadzirisa ma ions esimbi nekuparadzanisa simbi. Chigadzirwa ichi chinoshandiswa senzira yekuchenesa ma bleach pakugadzira nekugadzira zvinhu zvine mavara, uye dhayi, fiber treatment agent, cosmetic additive, mushonga, chikafu, agricultural chemical microfertilizer production, blood anticoagulant, complexing agent, detergent, stabilizer, synthetic raber, polymerization initiator uye heavy metal quantitative analysis agent, nezvimwewo. Mu chlorinated reduction initiation system yeSBR polymerization, disodium EDTA inoshandiswa sechikamu che active agent, kunyanya pakugadzirisa ma ions esimbi uye kudzora mwero we polymerization reaction.
Maitiro Ekugadzira:
1. Wedzera zvishoma nezvishoma musanganiswa we sodium cyanide ne formaldehyde mumushonga we ethylenediamine mune imwe ratio, wobva wapfuudza mhepo pa 85℃ uchidzvinyirirwa zvishoma kuti ubvise ammonia gasi. Mushure mekuita izvi, gadzirisa Ph value kusvika pa 4.5 ne concentrated sulfuric acid, wobva wabvisa ruvara, sefa, simbisa, simbisa uye paradzanisa, woomesa kuti chigadzirwa chapera chiwane.
2. Sanganisa 100kg yechloroacetic acid, 100kg yechando uye 135kg ye30% NaOH solution, wedzera 18kg ye83% ~ 84% ethylenediamine uchikurunga, woichengeta pa15℃ kweawa imwe. Wedzera zvishoma nezvishoma 30% NaOH solution mumabatch kusvika reactant yava alkaline, woichengeta patembiricha yemukamuri kwemaawa gumi nemaviri. Pisa kusvika 90℃, wedzera activated carbon kuti ibvise ruvara. Filtrate inogadziriswa kusvika ku4.5 Ph nehydrochloric acid uye inonamirwa uye inosefetwa pa90℃; filtrate inotonhorerwa, inonamirwa, inoparadzaniswa uye inogezwa, uye inoomeswa pa70℃ kuti chigadzirwa chapera chiwanikwe.
3. Yakagadzirwa nekushanda kwe ethylenediaminetetraacetic acid uye sodium hydroxide solution: Mu 2L reaction flask ine stirrer, wedzera 292g ethylenediaminetetraacetic acid nemvura 1.2L. Wedzera 200mL ye30% sodium hydroxide solution pasi pekukurunga wopisa kusvika zvese zvapera. Wedzera 20% hydrochloric acid woita kuti isashande zvakanaka kusvika pH=4.5, pisa kusvika 90℃ woisa pfungwa, sefa. Filtrate inotonhodzwa uye makristaro anonyungudika. Bvisa woparadzanisa, sukurudza nemvura yakasanganiswa, omesa pa70℃, wobva wawana chigadzirwa EDTA 2NA.
4. Wedzera ethylenediaminetetraacetic acid nemvura mutangi re enameled reaction, wedzera sodium hydroxide solution uchikurunga, pisa kusvika reaction yese yapera, wedzera hydrochloric acid kusvika pH 4.5, pisa kusvika 90°C woisa concentrate, sefa, filtrate yatonhodzwa, sefa makristaro, sukurudza nemvura, omesa pa70°C, uye tora EDTA 2NA.
