Ethylenediaminetetraacetic acid CAS: 60-00-4
Hoʻolauna huahana
Ethylenediaminetetraacetic acid CAS: 60-00-4
waiwai kemika
Hoʻopili kēia huahana mai ka wai e like me ka pauka keʻokeʻo. ʻO ka solubility i ka wai ma 25 ℃ he 0.5g/L. ʻAʻole hiki ke hoʻoheheʻe ʻia i ka wai anuanu, ka waiʻona a me nā mea hoʻoheheʻe kūlohelohe maʻamau. Hiki ke hoʻoheheʻe ʻia i loko o ka sodium hydroxide, sodium carbonate a me nā hoʻonā ammonia.
Hana hana:
Ka hopena o ka ethylenediamine a me ka waikawa chloroacetic. E hoʻohui i 100kg o ka chloroacetic acid, 100kg o ka hau a me 135kg o ka sodium hydroxide solution (30%) i loko o ka ipu aniani, a laila hoʻohui i 18kg o 83% a 84% ethylenediamine ma lalo o ka hoʻoulu ʻana. Incubate ma 15 ° C no 1 hola. Hoʻohui i ka solution 30Chemicalbook% sodium hydroxide i nā pūʻulu o 10L i kēlā me kēia manawa. Ma hope o kēlā me kēia hoʻohui, hoʻohui i kahi pūʻulu ʻē aʻe ma hope o ka ʻike ʻole ʻana o ka hoʻonā hoʻāʻo phenolphthalein i ka ʻulaʻula. E mālama i ka lumi wela no 12h. E wela i ka 90°C a e hoʻoneʻe kala me ke kalapona hoʻā. E kānana, holoi i ke koena kānana me ka wai, a hoʻoponopono hope i ka waiwai pH i 3 me ka waika hydrochloric concentrated. Hoʻomaʻalili a crystallize, kānana a holoi me ka wai a ʻaʻohe hopena chloride ion. Nā huahana maloʻo.
Ka hopena o ka ethylenediamine me ka formaldehyde a me ka sodium cyanide. Hoʻohui i 60% ethylenediamine aqueous solution, 30% sodium cyanide aqueous solution a me ka sodium hydroxide, a mālama i ka hui ʻana ma 20°C no 0.5h. A laila e hoʻohui i ka wai wai formaldehyde i ka dropwise. Ma hope o ka hopena, ua hoʻopau ʻia ka puke kemika a hoʻoheheʻe ʻia ka wai. A laila e hana hou i ka hana ma luna, me ka hoʻohui ʻana i ka formaldehyde keu no ka manawa hope loa e ʻae ai i ka sodium cyanide e hana holoʻokoʻa. E hoʻololi i ka pH i 1.2 me ka dilute acid. Ua hoʻoheheʻe ʻia kahi ʻeke keʻokeʻo, kānana, holoi ʻia me ka wai, a maloʻo ma 110 ° C. E kiʻi i ka huahana.
Kahua noi
ʻO ka Ethylenediaminetetraacetic acid (EDTA) kahi mea hana paʻakikī. Hoʻohana nui ʻia ʻo EDTA a hiki ke hoʻohana ʻia e like me ka bleaching fixative i ka hana ʻana i nā mea photosensitive kala, nā mea hoʻonaninani, nā mea kōkua hoʻoponopono fiber, nā mea hoʻohui hoʻonaninani, nā anticoagulants koko, nā detergents, stabilizers, synthetic rubber polymerization initiators, EDTA he chelate Representative mea o nā hui. Hiki iā ia ke hoʻokumu i nā paʻa paʻa paʻa i ka wai me nā metala alkali, nā mea honua laha a me nā metala hoʻololi. Ma waho aʻe o nā paʻakai sodium, aia kekahi mau paʻakai ammonium a me nā paʻakai like ʻole e like me ka hao, magnesium, calcium, copper, manganese, zinc, cobalt, a me ka alumini. He ʻokoʻa ka hoʻohana ʻana o kēlā me kēia paʻakai. Eia hou, hiki ke hoʻohana ʻia ʻo EDTA e hoʻopau koke i nā metala radioactive ʻino mai ke kino o ke kanaka a pāʻani i kahi hana detoxifying. He mea hana hoʻomaʻemaʻe wai. He hōʻailona koʻikoʻi nō hoʻi ʻo EDTA, akā hoʻohana ʻia ia e titrate metala nickel, copper, etc. Ke hoʻohana ʻia, pono e hoʻohana pū ʻia me ka amonia e hana ma ke ʻano he hōʻailona.
wehewehe kūkulu
Ethylenediaminetetraacetic acid
CAS: 60-00-4
Huina mole: C10H16N2O8
Kaumaha molekula: 292.2
ano : crystalline
Ka helu hehee 250 °C (Dek.)(kumu)
Ka helu hoʻolapalapa 434.18°C (manaʻo koʻikoʻi)
Māmā0,86 g/cm3
Pumi mahu <0.013 hPa (20 °C)
ʻIkepili Refractive n20/D 1.363
Ke kuhi uila >400°C DIN 51758
Ka waiho ʻana a me ka lawe ʻana
Hoʻopili: e like me ka koi o nā mea kūʻai aku
E mālama: E mālama i kahi maloʻo, ʻeleʻele a me ka makani.
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