Ethylenediaminetetraacetic acid CAS: 60-00-4
Intshayelelo yemveliso
Ethylenediaminetetraacetic acid CAS: 60-00-4
iimpawu zeekhemikhali
Le mveliso ikhazimla ngaphandle kwamanzi njengomgubo omhlophe. Ukunyibilika emanzini kwi-25℃ yi-0.5g/L. Ukunganyibiliki emanzini abandayo, utywala kunye nezinyibilikisi eziqhelekileyo eziphilayo. I-soluble kwi-sodium hydroxide, i-sodium carbonate kunye nezisombululo ze-ammonia.
Indlela yokuvelisa:
Ukusabela kwe-ethylenediamine kunye ne-chloroacetic acid. Yongeza i-100kg ye-chloroacetic acid, i-100kg yomkhenkce kunye ne-135kg yesisombululo se-sodium hydroxide (30%) kwi-reaction kettle, kwaye wongeze i-18kg ye-83% ukuya kwi-84% ye-ethylenediamine phantsi kokuxutywa. Fudumeza kwi-15 ° C ngeyure enye. Yongeza i-30Chemicalbook% isisombululo se-sodium hydroxide kwiibhetshi ze-10L ngexesha ngalinye. Emva kokongezwa nganye, yongeza enye ibhetshi emva kokuba isisombululo sovavanyo lwe-phenolphthalein singabonakali obomvu. Gcina kwiqondo lokushisa kwe-12h. Fudumeza ukuya kwi-90 ° C kwaye uguqule umbala ngekhabhoni esebenzayo. Hlunga, hlamba intsalela yokucoca ngamanzi, kwaye ekugqibeleni ulungise ixabiso le-pH ukuya kwi-3 kunye ne-concentrated hydrochloric acid. Pholisa kwaye ucwebezelise, hluza kwaye uhlambe ngamanzi de kungabikho reaction ion chloride. Iimveliso ezomileyo.
Ukusabela kwe-ethylenediamine kunye ne-formaldehyde kunye ne-sodium cyanide. Hlanganisa i-60% ye-ethylenediamine isisombululo se-aqueous, i-30% ye-sodium cyanide isisombululo se-aqueous kunye ne-sodium hydroxide, kwaye ugcine umxube kwi-20 ° C nge-0.5h. Emva koko yongeza isisombululo se-formaldehyde emanzini. Emva kokusabela, i-chemicalbook yachithwa kwaye amanzi aphelile. Emva koko phinda lo msebenzi ungentla, wongeza i-formaldehyde engaphezulu okokugqibela ukuvumela i-sodium cyanide ukuba isabele ngokupheleleyo. Lungisa i-pH kwi-1.2 kunye ne-asidi edibeneyo. Imvula emhlophe yana, yahluzwa, yahlanjwa ngamanzi, yomiswa kwi-110°C. Fumana imveliso.
Indawo yosetyenziso
I-Ethylenediaminetetraacetic acid (EDTA) yinto ebalulekileyo yokudibanisa. I-EDTA isetyenziswa kakhulu kwaye inokusetyenziswa njenge-blekning fixative ekusetyenzweni kwezixhobo ze-photosensitive zemibala, izinto ezincedisayo zokudaya, ii-fiber processing axiliaries, izongezo ze-cosmetic, ii-anticoagulants zegazi, ii-detergents, izizinzi, i-synthetic rubber polymerization initiator, i-EDTA yi-chelate Representative substances ye-mixed. Inokwenza iikhompleksi zeekhemikhali ezinyibilikayo ezizinzileyo zamanzi ezineentsimbi zealkali, izinto ezinqabileyo zomhlaba kunye neentsimbi eziguqukayo. Ukongeza kwiityuwa zesodium, kukho iityuwa ze-ammonium kunye neetyuwa ezahlukeneyo ezifana nentsimbi, i-magnesium, i-calcium, ithusi, i-manganese, i-zinc, i-cobalt kunye ne-aluminium. Nganye kwezi tyuwa inomsebenzi owahlukileyo. Ukongeza, i-EDTA inokusetyenziselwa ukukhupha ngokukhawuleza isinyithi esiyingozi se-radioactive emzimbeni womntu kwaye idlale indima yokukhupha ityhefu. Ikwayiarhente yokucoca amanzi. I-EDTA nayo isalathiso esibalulekileyo, kodwa isetyenziselwa ukuthambisa i-nickel yensimbi, ubhedu, njl njl. Xa isetyenziswe, kufuneka isetyenziswe kunye ne-ammonia ukuze isebenze njengesalathisi.
Inkcazo yokwakha
Ethylenediaminetetraacetic acid
CAS: 60-00-4
Ifomula yemolekyuli: C10H16N2O8
Ubunzima bemolekyuli: 292.2
ifom: ikristale
Indawo yokunyibilika yi-250 °C (dec.)(lit.)
Indawo yokubila yi-434.18°C (uqikelelo olurhabaxa)
Uxinzelelo0,86 g/cm3
Uxinzelelo lomphunga <0.013 hPa (20 °C)
Isalathiso se-refractive n20/D 1.363
Indawo edanyazayo >400°C DIN 51758
Ukugcinwa kunye nokuthutha
Ukupakisha: ngokweemfuno zabathengi
Ugcino: Gcina kwindawo eyomileyo, emnyama nengena umoya.
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