Acetaldehyde. Thupi ndi matenthedwe katundu. Kukonzekera ndi kugwiritsa ntchito

Acetaldehyde (maina ena: acetaldehyde metilformaldegid, ethanal) - ndi pawiri organic a kalasi ya aldehydes. mankhwala ndi wofunika kwa anthu, opezeka mu khofi, chakudya, zipatso kucha ndi masamba. Apanga ndi zomera. Zimachitika mwachibadwa ndipo zinabala mu lalikulu zedi mwa munthu. Acetaldehyde chilinganizo: CH3-Cho.

thupi katundu

1. Acetaldehyde - madzi colorless ndi lakuthwa chosangalatsa fungo.
2. Ndi mosavuta sungunuka mowa efa, ndi madzi.
3. Unyinji molar wa magalamu 44,05 / Mole.
4. kachulukidwe ndi 0,7 g / santimetr³.

katundu matenthedwe

1. Mfundo limatsogolera ndi madigiri -123.
2. The kuwira mfundo ndi madigiri 20.
3. kutentha poyatsira ndi wofanana ndi madigiri -39.
4. kutentha poyatsira ndi madigiri 185.

Kukonzekera acetaldehyde

1. Njira zofunika kwa yokonza mankhwala ndi mu makutidwe ndi okosijeni wa ethylene (otchedwa Wacker ndondomeko). Izo zikuwoneka ngati anachita izi:
2CH2 = C2H4 (ethylene) + O2 (mpweya) = 2CH3CHO (metilformaldegid)

2. Komanso, acetaldehyde akhoza kupangidwa ndi hydration wa acetylene pamaso pa salt Mercury (otchedwa anachita Kucherova). Ichi chimapereka phenol limene isomerized kuti aldehyde lapansi.

3. The njira zotsatirazi anali wotchuka pamaso pa Kubwera kwa ndondomekoyi pamwamba. Anaphedwa ndi makutidwe ndi okosijeni kapena dehydrogenation Mowa pa siliva kapena mkuwa chothandizira.

ntchito acetaldehyde

- muyenera acetaldehyde Pakuti zinthu? asidi acetic, butadiene, aldehyde ma polima, ndi ena zinthu zina organic.
- ntchito monga kalambulabwalo (a mankhwala kuti mtsikanayu zimene zikubweretsa chilengedwe cha chandamale mankhwala a) kwa asidi acetic. Komabe, popeza kuti tiganizire kugwiritsa ntchito mankhwala posakhalitsa unatha. Izi zinachitika chifukwa chakuti asidi acetic wosalira ndi mtengo kubala kwa METALON mwa njira Kativa ndi Monsanto.
- Metilformaldegid - ndi kalambulabwalo zofunika pentaerythritol, opangidwa kuchokera pyridine ndi krotonaldegidu.
- Kukonzekera kwa resins chifukwa chakuti urea ndi acetaldehyde angathe condense.
- Yokonza ethylidene diacetate imene kenako kubala polyvinyl monomer (vinilu nthochi).

Fodya kudalira ndi acetaldehyde

mankhwala - mbali yaikulu ya utsi fodya. chionetsero unachitikira posachedwapa, kumene anasonyezedwa kuti ubale synergistic asidi acetic ndi chikonga kumawonjezera akuti kudalira (makamaka anthu osakwana zaka makumi atatu).

Alzheimer Disease ndi acetaldehyde

Anthu amene alibe chibadwa chinthu metilformaldegida kutembenuka ku asidi acetic, ndi chiopsezo kutengera za matenda monga senile maganizo (kapena matenda a Alzheimer), zomwe kawirikawiri amapezeka mu ukalamba.

Mowa ndi metilformaldegid

Moti tiganizire chinthu ndi carcinogenic anthu, monga lero, pali umboni wa carcinogenic acetaldehyde mu mayesero osiyanasiyana nyama. Komanso, metilformaldegid kumawononga DNA, potero kupangitsa akanagwiritsa thupi chitukuko cha dongosolo akulu, amene chikugwirizana ndi kuphwanya kagayidwe mapuloteni mu thupi. kuphunzira zidakwa 800 inachitika, zimene ofufuza apeza kuti anthu ongoyendayenda acetaldehyde, pali chilema jini kwa wina enzyme - dehydrogenase mowa. Chifukwa cha ichi, anthu odwala ngati ali pangozi yaikulu ya kudwala kansa ya impso ndi kumtunda kwa chiwindi.

chitetezo

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