Acetaldehyde. 'Meleng le mogote thepa. Ho lokisetsa le ho Sebelisa

Acetaldehyde (mabitso a mang: acetaldehyde metilformaldegid, ethanal) - ke komponeng manyolo bao e leng sehlopha sa aldehydes. ntho ena e bohlokoa bakeng sa batho, e fumanoa kofi, bohobe, litholoana tse butsoitseng le meroho. Tsa maiketsetso ke limela. E hlaha ka tlhaho le hlahisoang ka bongata ke batho. Acetaldehyde moralo: CH3-cho.

thepa 'meleng

1. Acetaldehyde - e mokelikeli colorless le e bohale monko o sa thabiseng.
2. Ho hang-hang qhibilihang ka har'a joala phenylate, le metsi.
3. The boima molare tsa dikgerama 44,05 / mole.
4. segokanyipalo ke 0.7 g, / santimetr³.

thepa mogote

1. The ntlha qhibiliha ke likhato -123.
2. The belisoa ntlha e likhato 20.
3. The mocheso thothetsang molelo o lekana le likhato -39.
4. mocheso thothetsang molelo ke likhato tse 185.

ho lokisetsa acetaldehyde

1. Tsela ea motheo bakeng sa ba lokisetsa ho ea lithethefatsi ena ke ka ho kena moea oa ethylene (thoeng Wacker thulaganyou e). Ho bonahala eka itsoara joang ka sena:
2CH2 = C2H4 (ethylene) + O2 (oksijene) = 2CH3CHO (metilformaldegid)

2. Hape, acetaldehyde ka hlahisoang ke ho hydration tsa acetylene ka ho ba teng ha matsoai mercury (thoeng itšoara joang Kucherova). Sena se fana ka phenol eo ka nako eo isomerized ho aldehyde ena.

3. Mokhoa latelang e ne e le e ratoa pele qaleha tsa tshebetso ka holimo. Bolaoa ke ho kena moea kapa dehydrogenation ea ethanol ka silevera kapa koporo sethothetsi.

kopo acetaldehyde

- hloka acetaldehyde Ka eo dintho? asiti Acetic, butadiene, aldehyde polymers, 'me ba bang ba lintho tse ling tse phelang.
- sebelisoa e le selelekela (a ntho eo kopanelang papaling ea ho ka itšoara joang ea isang ho ho bōptjoa shebiloeng ntho a) ho acid e acetic. Leha ho le joalo, kaha re nahana ka ho etsa ntho e haufinyane felile. Sena se etsahetse ka lebaka la hore e acid e acetic ke pete le ho theko e tlaase ho hlahisa ho tloha METALON ke dithulaganyo Kativa le Monsanto.
- Metilformaldegid - e selelekela bohlokoa ho pentaerythritol, derivatives pyridine le krotonaldegidu.
- Ho lokisetsa tsa halogenated e loketseng ha e le hantle hore urea le acetaldehyde na matla a ho condense.
- Ho lokisetsa tsa ethylidene diacetate eo o ile hlahisa polyvinyl monomer (vinyl ea acetate).

Koae ho itšetleha le acetaldehyde

ntho ena - karolo e itseng e khōlō ea mosi koae. pontšo e ile ea tšoareloa tsoa, moo e ne e bontša hore kamano synergistic ea acid e acetic le bokoali eketsa le pontšo ea ho itšetleha (haholo-holo batho ba ka tlas'a lilemo tse mashome a mararo).

Alzheimer Mafu le acetaldehyde

Tseo batho ba neng ba ha ba na le liphatsa tsa lefutso le palokatiso metilformaldegida ho sokoloha ka acid e acetic, ba le kotsing e khōlō ea predisposition ho mafu a kang senile dementia ' (kapa lefu la Alzheimer), seo hangata se le hlaha ka botsofali.

Joala le metilformaldegid

Mohlomong re nahana ka ntho e ke carcinogenic ho batho, e le ea kajeno, ho na le ke bopaki ba hore carcinogenic acetaldehyde ka liteko tse fapa-fapaneng liphoofolo. Ho phaella moo, metilformaldegid senya DNA, ka tsela eo ho etsa hore e disproportionate boima ba 'mele ntshetsopeleng ya tsamaiso mesifa, e leng e tse amanang le ho tlōla metabolism protheine ka' mele. ho ithuta makhoba a tahi 800 li ne li tšoaroa, eo ho eona bafuputsi ba etsa qeto ea hore batho ba pepesehetse acetaldehyde, ho na le sekoli phatsa ea lefutso ka 'ngoe potlakisang tsebetso ea lik'hemik'hale - dehydrogenase joala. Ka lebaka lena, bakuli ba joalo ba kotsing e khōloanyane ea ho tšoaroa ke kankere ea liphio le karolo e ka holimo ea sebete.

polokeho

ntho e nang le chefo e. Ke contaminant ea sepakapaka nakong tsuba kapa exhausts ka jams sephethephethe.