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Igama lemveliso:I-Ethyl acetate

Imo yemolekyuli:C4H8O2

Inombolo yeCAS:141-78-6

Imveliso yesakhiwo semolekyuli:

Iipropati zeMichiza:

I-Ethyl acetate (isakhiwo esiboniswe ngasentla) yi-ester eyaziwa kakhulu kubafundi abaninzi be-chemistry kwaye mhlawumbi i-ester enoluhlu olubanzi kakhulu lokusetyenziswa. I-Esters ithathwe ngokwesakhiwo kwi-carboxylic acids ngokutshintsha i-hydrogen ene-acidic ngeqela le-alkyl okanye i-aryl. I-Ethyl acetate ngokwayo ilulwelo olungenambala kwiqondo lobushushu begumbi kunye nevumba elimnandi "leziqhamo", bp 77°C.

I-Ethyl acetate ineendlela ezininzi zokusetyenziswa, ezifana neziqhamo ezenziweyo kunye neziphuculi zevumba, iziqholo ezenziweyo zeconfectionery, i-ayisikrimu kunye neekeyiki, njengesinyibilikisi kwizicelo ezininzi (kubandakanya iti ye-decaffeinating kunye nekofu) yevanishi kunye neepeyinti (i-nail varnish remover), kunye ukwenziwa kwee-inki zokuprinta kunye neziqholo.

Isicelo:

I-Ethyl acetate isetyenziswa ikakhulu njengesinyibilikisi kunye ne-diluent, ithandwa ngenxa yeendleko zayo eziphantsi, ubutyhefu obuphantsi, kunye nevumba elimnandi. Ngokomzekelo, ngokuqhelekileyo isetyenziselwa ukucoca iibhodi zeesekethe kwaye kwezinye izikhonkwane zokususa i-varnish (i-acetone kunye ne-acetonitrile nazo zisetyenziswa). Iimbotyi zekofu kunye namagqabi eti anecaffeinated kunye nale solvent.Ikwasetyenziswa kwiipeyinti njenge activator okanye i-hardener. Kwiziqholo, iphuma ngokukhawuleza, ishiya kuphela ivumba le-perfume esikhumbeni.
3 – 1 – Ukusetyenziswa kweLebhu
Kwilabhoratri, imixube equkethe i-ethyl acetate isetyenziswa ngokuqhelekileyo kwikholamu yechromatography kunye ne-extractions. I-acetate ye-Ethyl ayifane ikhethwe njenge-solvent yokuphendula ngenxa yokuba ithanda ukuhlanjululwa kwe-hydrolysis kunye ne-trans esterification.
3 – 2 – Ukwenzeka kwiiwayini
I-acetate ye-Ethyl yeyona ester ixhaphakileyo kwiwayini, iyimveliso ye-asidi eguquguqukayo eqhelekileyo - i-acetic acid, kunye ne-ethyl alcohol eyenziwa ngexesha lokuvutshelwa. Ivumba le ethyl acetate licace kakhulu kwi wayini ezincinci kwaye linegalelo kwimbono jikelele "yeziqhamo" kwi wayini.
3 – 3 – Iarhente yokubulala i-Entomological
Kwinkalo ye-entomology, i-ethyl acetate yi-asphyxiant esebenzayo yokusetyenziswa ekuqokeleleni izinambuzane kunye nokufunda. Kwingqayi yokubulala ehlawuliswe nge-ethyl acetate, umphunga uya kubulala inambuzane eqokelelweyo (ngokuqhelekileyo ikhulile) ngaphandle kokuyitshabalalisa. Ngenxa yokuba ingeyo-hygroscopic, i-ethyl acetate ikwagcina isinambuzane sithambile ngokwaneleyo ukuvumela ukunyuswa okufanelekileyo kulungele ukuqokelela.