Ethylene Diamine Tetraacetic Acid Disodium (EDTA Na2)
Taonga: Ethylene Diamine Tetraacetic Acid Disodium (EDTA Na2)
CAS#: 6381-92-6
Tātai: C10H14N2O8Na2.2H2O
Te taumaha ngota: 372
Tātai Hanganga:
Nga Whakamahinga: E tika ana mo te kai horoi, te awhina tae, te kaihoko tukatuka mo nga muka, te taapiri whakapaipai, te taapiri kai, te tongi ahuwhenua etc.
Whakatakotoranga:
| Tūemi | Paerewa |
| Te ahua | Paura ma |
| Whakamatau(C10H14N2O8Na2.2H2O) | ≥99.0% |
| Paramu(Pb) | ≤0.0005% |
| Ferrum(Fe) | ≤0.001% |
| Chloride(Cl) | ≤0.05% |
| pūkawa (SO4) | ≤0.05% |
| PH(50g/L; 25 ℃) | 4.0-6.0 |
| Rahi Matūriki | ＜40mesh≥98.0% |
Taupānga:
Ko te EDTA 2NA he kaihoko matatini nui mo te whakahiato i nga katote whakarewa me te wehe i nga konganuku. Ko tenei hua ka whakamahia hei otinga whakaahuru mo te hanga me te tukatuka i nga taonga whakaahua tae, me te tae o te awhina, te kaihoko maimoatanga muka, te taapiri whakapaipai, te rongoa, te kai, te hanga miihini matū ahuwhenua, te anticoagulant toto, te kaihoko whakahiato, te horoi, te whakapumau, te rapa waihanga, te kaitakawaenga polymerization me te whakarewatanga o te whakarewatanga o te polymerization inenga, me era atu. Ka whakamahia te EDTA hei waahanga o te kaihoko kaha, te nuinga mo te whakahiato i nga katote rino me te whakahaere i te tere o te tauhohenga polymerization.
Tukanga Whakaputa:
1. Whakapirihia te ranunga o te konutai cyanide me te formaldehyde ki te wairewa wai o te ethylenediamine i roto i tetahi owehenga, ka tukuna te hau ki te 85 ℃ i raro i te pehanga iti hei tango i te hau haukini. I muri i te tauhohenga, whakatikahia te uara Ph ki te 4.5 me te waikawa pungatara whakakoi, katahi ka whakahekehia te tae, te tātari, te aro, te tioata me te wehe, ka whakamaroke kia tae mai te hua kua oti.
2. Whakaranuhia te 100kg o te waikawa chloroacetic, 100kg o te hukapapa me te 135kg o te 30% NaOH otinga, whakauruhia te 18kg o 83% ~ 84% ethylenediamine i raro i te whakaoho, ka pupuri i te 15 ℃ mo te 1h. Āta tāpirihia te wairewa NaOH 30% i roto i nga puranga tae noa ki te kawakore te tauhohenga, ka pupuri i te pāmahana rūma mo te 12h. Whakawerahia ki te 90 ℃, tāpirihia te waro whakahohe kia whakahekehia te tae. Ka whakatikahia te filtrate ki te 4.5 Ph me te waikawa waikawa me te kukū me te tātari i te 90 ℃; ka whakamataohia te filtrate, te tioata, ka wehea ka horoia, ka whakamaroke ki te 70 ℃ kia whiwhi ai i te hua kua oti.
3.I hangaia e te mahi o te waikawa ethylenediaminetetraacetic me te wairewa konutai waikawa: I roto i te ipu hohenga 2L me te whakakorikori, whakauruhia te 292g waikawa ethylenediaminetetraacetic me te wai 1.2L. Tāpirihia te 200mL o te 30% wairewa konutai waihā i raro i te kōrori me te wera kia mutu katoa te tauhohenga. Tāpirihia te 20% waikawa pūhaumāota me te whakakore ki te pH=4.5, whakamahana ki te 90 ℃ me te kukū, tātari. Ka whakamataohia te filtrate, ka heke nga tioata. Te tango me te wehe, horoi ki te wai makuku, maroke i te 70 ℃, ka whiwhi i te hua EDTA 2NA.
4. Tāpirihia te waikawa ethylenediaminetetraacetic me te wai ki te tank tauhohenga enameled, te whakauru i te wairewa konutai waikawa i raro i te whakaoho, te wera tae noa ki te tauhohenga katoa, te whakauru i te waikawa waikawa ki te pH 4.5, te wera ki te 90 ° C me te arotahi, te tātari, ka whakamataohia te filtrate, te tarai i nga tioata, te horoi ki te wai, ka maroke ki te 70 EDTA ° C, ka maroke ki te 70 ° C.
