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Igama Lomkhiqizo:I-Ethyl acetate

Ifomethi ye-Molecular:C4H8O2

Inombolo ye-CAS:141-78-6

Isakhiwo samangqamuzana omkhiqizo:

Chemical Properties:

I-Ethyl acetate (isakhiwo esiboniswe ngenhla) iyi-ester ejwayeleke kakhulu kubafundi abaningi bekhemistri futhi ngokunokwenzeka i-ester enohlu olubanzi kakhulu lokusetshenziswa. Ama-Ester atholakala ngokwesakhiwo kuma-carboxylic acid ngokufaka i-acidic hydrogen esikhundleni seqembu le-alkyl noma i-aryl. I-Ethyl acetate ngokwayo iwuketshezi olungenambala ezingeni lokushisa elivamile nephunga elimnandi “lezithelo”, bp 77°C.

I-Ethyl acetate inokusetshenziswa okuningi, njengezithako zezithelo zokwenziwa kanye nezithuthukisi zephunga, ama-flavour okwenziwa e-confectionery, u-ayisikhilimu namakhekhe, njengesixazululi ezisetshenziswa eziningi (okuhlanganisa itiye le-decaffeinating nekhofi) kumavarnish nopende (isikhiphi sokuvanisha izinzipho), kanye ukwenziwa koyinki bokuphrinta namakha.

Isicelo:

I-Ethyl acetate isetshenziswa ngokuyinhloko njengesixazululi nesincibilikisiwe, ithandwa ngenxa yezindleko zayo eziphansi, ubuthi obuphansi, kanye nephunga elimnandi. Isibonelo, kuvame ukusetshenziselwa ukuhlanza amabhodi wesifunda nakwezinye izikhipho zokuvanisha izinzipho (i-acetone ne-acetonitrile nazo ziyasetshenziswa). Ubhontshisi wekhofi namaqabunga etiye ane-decaffeinated ngalesi sinyibilikisi.Ibuye isetshenziswe kumapende njenge-activator noma i-hardener.[catation required] I-Ethyl acetate ikhona ku-confectionery, iziqholo, nezithelo. Kumakha, ayahwamuka ngokushesha, kusale kuphela iphunga lamakha esikhumbeni.
3 – 1 – Ukusetshenziswa kwaselabhorethri
Elabhorethri, izingxube eziqukethe i-ethyl acetate zivame ukusetshenziswa kukholomu ye-chromatography nokukhipha. I-Ethyl acetate ayivamisile ukukhethwa njengesixazululi sokusabela ngoba ithambekele ku-hydrolysis kanye ne-trans esterification.
3 – 2 – Ukwenzeka ewayinini
I-Ethyl acetate iyi-ester evame kakhulu ewayinini, ingumkhiqizo we-asidi ephilayo evame kakhulu eguquguqukayo - i-acetic acid, kanye ne-ethyl alcohol ekhiqizwa ngesikhathi sokuvutshelwa. Iphunga le-ethyl acetate ligqama kakhulu ewayinini elincane futhi linomthelela ekubonweni okuvamile "kwezithelo" ewayinini.
3 - 3 - Umenzeli wokubulala we-Entomological
Emkhakheni we-entomology, i-ethyl acetate iyi-asphyxiant esebenzayo ukuze isetshenziswe ekuqoqweni nasekufundeni izinambuzane. Ebhodweni lokubulala elikhokhiswe i-ethyl acetate, umhwamuko uzobulala isinambuzane esiqoqiwe (esivame ukukhula) ngokushesha ngaphandle kokusibhubhisa. Ngenxa yokuthi ayiyona i-hygroscopic, i-ethyl acetate futhi igcina isinambuzane sithambile ngokwanele ukuvumela ukukhweza okufanele kulungele iqoqo.