I-Ethylenediaminetetraacetic acid CAS: 60-00-4
Isingeniso somkhiqizo
I-Ethylenediaminetetraacetic acid CAS: 60-00-4
izakhiwo zamakhemikhali
Lo mkhiqizo ucwebezela emanzini njengempushana emhlophe. Ukuncibilika emanzini ku-25℃ ngu-0.5g/L. Ayincibiliki emanzini abandayo, utshwala nezincibilikisi ezijwayelekile zemvelo. Incibilika ku-sodium hydroxide, i-sodium carbonate nezixazululo ze-ammonia.
Indlela yokukhiqiza:
Ukusabela kwe-ethylenediamine ne-chloroacetic acid. Faka u-100kg we-chloroacetic acid, u-100kg weqhwa kanye no-135kg wesixazululo se-sodium hydroxide (30%) eketelani lokusabela, bese wengeza u-18kg wama-83% kuya ku-84% we-ethylenediamine ngaphansi kokunyakaziswa. Fudumeza ku-15°C ihora elingu-1. Engeza i-30Chemicalbook% isisombululo se-sodium hydroxide ngamaqoqo angu-10L isikhathi ngasinye. Ngemva kokuhlanganisa ngakunye, engeza enye inqwaba ngemva kokuba isisombululo sokuhlola i-phenolphthalein singabonisi okubomvu. Gcina ekamelweni lokushisa 12h. Shisisa ufike ku-90°C futhi ushintshe umbala ngekhabhoni ecushiwe. Hlunga, geza insalela yokuhlunga ngamanzi, futhi ekugcineni ulungise inani le-pH libe ngu-3 nge-concentrated hydrochloric acid. Pholisa futhi ucwebezele, hlunga futhi ugeze ngamanzi kuze kube yilapho kungabikho ukusabela kwe-chloride ion. Imikhiqizo eyomisiwe.
Ukusabela kwe-ethylenediamine nge-formaldehyde ne-sodium cyanide. Xuba u-60% we-ethylenediamine aqueous solution, 30% sodium cyanide aqueous solution ne-sodium hydroxide, bese ugcine ingxube ku-20°C isikhathi esingu-0.5h. Bese wengeza i-formaldehyde aqueous solution dropwise. Ngemva kokusabela, i-chemicalbook yachithwa futhi amanzi ahwamuka. Bese uphinda umsebenzi ongenhla, wengeza i-formaldehyde eyeqile okokugcina ukuze i-sodium cyanide isabele ngokuphelele. Lungisa i-pH ibe ngu-1.2 nge-asidi exubile. Imvula emhlophe iyana, iyahlungwa, igezwe ngamanzi, bese yomiswa ku-110°C. Thola umkhiqizo.
Inkambu yohlelo lokusebenza
I-Ethylenediaminetetraacetic acid (EDTA) iyi-ejenti ebalulekile eyinkimbinkimbi. I-EDTA isetshenziswa kabanzi futhi ingasetshenziswa njenge-bleaching fixative ekucubunguleni izinto ezithinta umbala, izinsiza zokudaya, izinsiza zokucubungula i-fiber, izithasiselo zezimonyo, ama-anticoagulants egazi, okokuhlanza, iziqinisi, iziqalisi zenjoloba zokwenziwa kwe-polymerization, i-EDTA iyi-chelate Representative substances yengxubevange. Ingakha izakhi zamakhemikhali ezincibilika emanzini azinzile ngezinsimbi ze-alkali, izakhi zomhlaba ezingavamile kanye nezinsimbi eziguqukayo. Ngaphezu kosawoti we-sodium, kukhona nosawoti we-ammonium nosawoti ohlukahlukene njengensimbi, i-magnesium, i-calcium, ithusi, i-manganese, i-zinc, i-cobalt ne-aluminium. Ngayinye yalawa kasawoti inokusetshenziswa okuhlukile. Ngaphezu kwalokho, i-EDTA ingasetshenziswa futhi ukukhipha ngokushesha izinsimbi eziyingozi ezikhipha imisebe emzimbeni womuntu futhi idlale indima ekhipha ubuthi. Iphinde ibe i-ejenti yokuhlanza amanzi. I-EDTA nayo iyinkomba ebalulekile, kodwa isetshenziselwa ukulinganisa i-nickel yensimbi, ithusi, njll. Uma isetshenziswa, kufanele isetshenziswe kanye ne-ammonia ukuze isebenze njengenkomba.
Incazelo yokwakha
I-Ethylenediaminetetraacetic acid
I-CAS: 60-00-4
Ifomula yemolekyuli: C10H16N2O8
Isisindo se-molecule: 292.2
ifomu: crystalline
Iphoyinti lokuncibilika lingu-250 °C (dec.)(lit.)
Iphoyinti lokubilisa 434.18°C (isilinganiso esinzima)
Ukuminyana0,86 g/cm3
Umfutho we-vapor <0.013 hPa (20 °C)
Inkomba ye-Refractive n20/D 1.363
Iphoyinti elikhanyayo >400°C DIN 51758
Isitoreji kanye nezinto zokuhamba
Ukupakisha:ngokwezidingo zamaklayenti
Isitoreji: Gcina endaweni eyomile, emnyama futhi engenamoya.
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