I-asidi ye-ethylenediaminetetraacetic CAS: 60-00-4
Isingeniso somkhiqizo
I-asidi ye-ethylenediaminetetraacetic CAS: 60-00-4
izakhiwo zamakhemikhali
Lo mkhiqizo uphuma emanzini njengempuphu emhlophe. Ukuncibilika emanzini ku-25℃ kungu-0.5g/L. Akuncibiliki emanzini abandayo, utshwala kanye nezinyibilikisi ezijwayelekile zezinto eziphilayo. Kuncibilika kuzixazululo ze-sodium hydroxide, i-sodium carbonate kanye ne-ammonia.
Indlela yokukhiqiza:
Ukusabela kwe-ethylenediamine kanye ne-chloroacetic acid. Faka i-100kg ye-chloroacetic acid, i-100kg yeqhwa kanye ne-135kg yesisombululo se-sodium hydroxide (30%) eketheni yokusabela, bese ufaka i-18kg ye-83% kuya ku-84% ye-ethylenediamine ngaphansi kokuxubha. Faka ku-15°C ihora eli-1. Faka isixazululo se-30Chemicalbook% sodium hydroxide ngamaqoqo angu-10L isikhathi ngasinye. Ngemva kokufaka ngakunye, engeza elinye ibhetshi ngemuva kokuba isixazululo sokuhlola se-phenolphthalein singabonisi bomvu. Gcina ekamelweni lokushisa amahora angu-12. Shisa ku-90°C bese ususa umbala nge-activated carbon. Hlunga, geza insalela yesihlungi ngamanzi, bese ekugcineni ulungisa inani le-pH libe ngu-3 nge-hydrochloric acid egxilile. Pholisa bese uqinisa, hlunga bese ugeza ngamanzi kuze kube yilapho kungekho kusabela kwe-chloride ion. Imikhiqizo eyomile.
Ukusabela kwe-ethylenediamine ne-formaldehyde kanye ne-sodium cyanide. Hlanganisa isixazululo samanzi esingu-60% se-ethylenediamine, isixazululo samanzi esingu-30% se-sodium cyanide kanye ne-sodium hydroxide, bese ugcina ingxube ku-20°C amahora angu-0.5. Bese ufaka isixazululo samanzi se-formaldehyde ngendlela ehlayo. Ngemva kokusabela, incwadi yamakhemikhali yancishiswa futhi amanzi ahwamuka. Bese uphinda umsebenzi ongenhla, wengeze i-formaldehyde eyengeziwe okokugcina ukuze uvumele i-sodium cyanide ukuthi isabele ngokuphelele. Lungisa i-pH ibe ngu-1.2 nge-dilute acid. I-white precipitate yavuvukala, yahlungwa, yagezwa ngamanzi, futhi yomiswa ku-110°C. Thola umkhiqizo.
Inkambu yohlelo lokusebenza
I-Ethylenediaminetetraacetic acid (EDTA) iyi-ejenti ebalulekile yokuhlanganisa izinto. I-EDTA isetshenziswa kabanzi futhi ingasetshenziswa njengesithako sokumhlopheza ekucutshungulweni kwezinto ezinombala ezizwela ukukhanya, izithasiselo zokudaya, izithasiselo zokucubungula ifayibha, izithasiselo zezimonyo, izithasiselo zegazi ezilwa nokuvuvukala, izihlanzi, iziqinisi, iziqalisi ze-polymerization yerabha yokwenziwa, i-EDTA iyi-chelate Emele izinto ezixubile. Ingakha ama-complexes amakhemikhali ancibilikayo emanzini aqinile anezinsimbi ze-alkali, izakhi zomhlaba ezingavamile kanye nezinsimbi zokuguquka. Ngaphezu kosawoti we-sodium, kukhona nosawoti we-ammonium kanye nosawoti ohlukahlukene njengensimbi, i-magnesium, i-calcium, ithusi, i-manganese, i-zinc, i-cobalt, ne-aluminium. Ngayinye yalezi zisawoti inokusetshenziswa okuhlukile. Ngaphezu kwalokho, i-EDTA ingasetshenziswa futhi ukukhipha ngokushesha izinsimbi eziyingozi eziyingozi emzimbeni womuntu futhi idlale indima yokuhlanza. Futhi iyi-ejenti yokwelapha amanzi. I-EDTA nayo iyinkomba ebalulekile, kodwa isetshenziselwa ukukala i-nickel yensimbi, ithusi, njll. Uma isetshenziswa, kumele isetshenziswe kanye ne-ammonia ukuze isebenze njengenkomba.
Incazelo yokwakha
I-Ethylenediaminetetraacetic acid
I-CAS: 60-00-4
Ifomula yama-molecule: C10H16N2O8
Isisindo sama-molecule: 292.2
ifomu: ikristalu
Iphuzu lokuncibilika 250 °C (dec.) (lit.)
Iphuzu lokubila 434.18°C (isilinganiso esilinganiselwe)
Ubuningi 0,86 g/cm3
Umfutho womusi <0.013 hPa (20 °C)
Inkomba yokubuka kabusha n20/D 1.363
Iphoyinti le-Flash >400°C DIN 51758
Isitoreji kanye nokuthuthwa
Ukupakisha: ngokuya ngemfuneko yamakhasimende
Indawo Yokugcina: Gcina endaweni eyomile, emnyama futhi enomoya.
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