Te Disodium Waikawa Ethylene Diamine Tetraacetic (EDTA Na2)
Taonga: Ethylene Diamine Tetraacetic Acid Disodium (EDTA Na2)
Nama CAS: 6381-92-6
Tātai: C10H14N2O8Na2.2H2O
Taumaha ngota: 372
Tātai Hanganga：
Ngā Whakamahinga: E pā ana ki te hopi horoi, te tāpiri tae, te kaihoko tukatuka muka, te tāpiri whakapaipai, te tāpiri kai, te tongi ahuwhenua me ētahi atu.
Ngā Whakatakotoranga：
| Taonga | Paerewa |
| Āhua | Paura Mā |
| Whakamātautau (C)10H14N2O8Na2.2H2O) | ≥99.0% |
| Paramupa (Pb) | ≤0.0005% |
| Ferum(Fe) | ≤0.001% |
| Pūhaumāota(Cl) | ≤0.05% |
| Te whanariki (SO4) | ≤0.05% |
| PH (50g/L; 25℃) | 4.0-6.0 |
| Rahi o te Matūriki | <40mesh≥98.0% |
Taupānga：
He mea nui te EDTA 2NA hei whakapūmau i ngā katote konganuku me te wehewehe i ngā konganuku. E whakamahia ana tēnei hua hei otinga whakapūmau mā mō te whakawhanake me te tukatuka rauemi whakaahua tae, me te āwhina tae, te kaihoko maimoatanga muka, te tāpiri whakapaipai, te rongoā, te kai, te hanga tongi moroiti matū ahuwhenua, te whakakore toto, te kaihoko whakapūmau, te hopi horoi, te whakaū, te rapa hangai, te kaiwhakaoho polymerization me te kaihoko tātari tauanga konganuku taumaha, me ētahi atu. I roto i te pūnaha whakaoho whakaiti chlorinated mō te polymerization SBR, ka whakamahia te disodium EDTA hei wāhanga o te kaihoko hohe, ko te nuinga mō te whakapūmau i ngā katote rino me te whakahaere i te tere o te tauhohenga polymerization.
Tukanga Whakaputa:
1. Tāpirihia mārire te ranunga o te konutai cyanide me te formaldehyde ki te wairewa o te ethylenediamine i roto i tētahi ōwehenga, ka tukuna te hau i te 85℃ i raro i te pēhanga iti hei tango i te hau haukini. Whai muri i te tauhohenga, whakatikatikahia te uara Ph ki te 4.5 ki te waikawa whanariki kukū, kātahi ka tangohia te tae, tātarihia, kukūhia, whakatiotia, wehea, ka whakamaroke kia puta te hua oti.
2. Whakaranua te 100kg o te waikawa chloroacetic, te 100kg o te hukapapa me te 135kg o te otinga NaOH 30%, tāpirihia te 18kg o te 83%~84% ethylenediamine me te whakaoho, ka pupuri i te 15℃ mō te 1 hāora. Tāpirihia mārire te otinga NaOH 30% i roto i ngā puranga kia kawakore te matū tauhohe, ka pupuri i te pāmahana rūma mō te 12 hāora. Whakamahanahia ki te 90℃, tāpirihia te waro whakahohe hei tango tae. Ka whakatikatikaina te tātari ki te 4.5 Ph me te waikawa hauwaiora, ka whakakīkīhia, ka tātarihia ki te 90℃; ka whakamataohia te tātari, ka whakatiotia, ka wehea, ka horoia, ka whakamarokehia ki te 70℃ kia puta ai te hua oti.
3. I hangaia mā te mahi a te waikawa ethylenediaminetetraacetic me te otinga konutai hauwai: I roto i tētahi pounamu tauhohenga 2L kua rite ki te whakaoho, tāpirihia te 292 karamu o te waikawa ethylenediaminetetraacetic me te 1.2 rita wai. Tāpirihia te 200mL o te otinga konutai hauwai 30% me te whakaoho, ka whakamahana kia mutu rā anō te tauhohenga katoa. Tāpirihia te waikawa hauwai 20% ka whakakorea ki te pH=4.5, whakamahana ki te 90℃ ka whakatōtō, tātarihia. Ka whakamataohia te tātari, ka puta ngā tioata. Tangohia, ka wehea, ka horoia ki te wai whakapūkara, ka whakamaroke ki te 70℃, ka whiwhi i te hua EDTA 2NA.
4. Tāpirihia te waikawa ethylenediaminetetraacetic me te wai ki te tāke tauhohenga enamel, tāpirihia te otinga konutai hauwaiwai me te whakaoho, whakamahanahia kia tauhohe katoa, tāpirihia te waikawa hauwaiwai ki te pH 4.5, whakamahanahia ki te 90°C ka whakawhāitihia, tātarihia, whakamataohia te tātari, tātarihia ngā tioata, horoia ki te wai, whakamarokehia ki te 70°C, ka whiwhi i te EDTA 2NA.
