Acetaldehyde. Jiki da kuma thermal Properties. Shiri kuma amfani da

Acetaldehyde (sauran sunayen: acetaldehyde metilformaldegid, ethanal) - shi ne wani kwayoyin fili na zuwa aji na aldehydes. Wannan abu ne da muhimmanci ga mutane, aka same shi a cikin kofi, gurasa, cikakke 'ya'yan itatuwa da kayan lambu. Hada da shuke-shuke. Yana faruwa ta halitta, kuma aka samar a cikin manyan yawa da mutum. Acetaldehyde dabara: CH3-Cho.

jiki Properties

1. Acetaldehyde - a colorless ruwa da ciwon kaifi m wari.
2. Shi ne readily mai narkewa a cikin ether, barasa da kuma ruwa.
3. A matauni taro na 44,05 grams / mole.
4. The yawa ne 0.7 g / santimetr³.

thermal Properties

1. A narkewa batu ne -123 digiri.
2. A tafasar batu ne 20 digiri.
3. A ƙonewa zafin jiki ne daidai -39 digiri.
4. The ƙonewa zafin jiki ne 185 digiri.

Shiri acetaldehyde

1. Ainihin tsari da shiri na wannan abu ne a cikin hadawan abu da iskar shaka na ethylene (abin da ake kira Wacker tsari). Yana kama da wannan dauki:
2CH2 = C2H4 (ethylene) + O2 (oxygen) = 2CH3CHO (metilformaldegid)

2. Har ila yau, acetaldehyde za a iya samar da hydration na acetylene a gaban Mercury salts (abin da ake kira dauki Kucherova). Wannan ba wani phenol to, wanda aka isomerized ga aldehyde.

3. Wadannan Hanyar ya rare kafin zuwan na sama tsari. Kashe da hadawan abu da iskar shaka ko dehydrogenation na ethanol kan azurfa ko jan karfe mai kara kuzari.

aikace-aikace acetaldehyde

- bukatar acetaldehyde Ga wanda abubuwa? Acetic acid, butadiene, aldehyde polymers, da kuma wasu kwayoyin abubuwa.
- yi amfani a matsayin precursor (wani abu da ke taka rawa a cikin dauki manyan zuwa halittar wani manufa abu) to acetic acid. Duk da haka, tun da muka duba yiwuwar amfani da abu zarar daina. Wannan ya faru domin dalilin cewa acetic acid ne mafi sauki da kuma araha don samar daga METALON da matakai Kativa da Monsanto.
- Metilformaldegid - wani muhimmin precursor zuwa pentaerythritol, pyridine Kalam kuma krotonaldegidu.
- Shiri na resins saboda gaskiyar cewa urea da acetaldehyde suna da ikon cunkoso.
- Shiri na ethylidene diacetate daga wanda baya nuna polyvinyl monomer (roba acetate).

Taba dogara da acetaldehyde

Wannan abu - wani gagarumin rabo daga taba hayaki. zanga-zanga da aka gudanar kwanan nan, inda aka nuna cewa synergistic dangantakar acetic acid da nicotine qara magana da dogaro (musamman a mutane a karkashin shekaru talatin).

Alzheimer ta cuta da kuma acetaldehyde

Wadanda mutane suka ba su da wani kayyade factor metilformaldegida hira cikin acetic acid, da wani babban hadarin predisposition ga irin cututtuka kamar na tsufa gigin-tsufa (ko Alzheimer ta cutar), wanda yawanci yakan faru a cikin tsufa.

Barasa da kuma metilformaldegid

Mai yiwuwa muna la'akari da abu ne carcinogenic da mutane, kamar yadda na yau, akwai shaidar carcinogenic acetaldehyde a daban-daban dabba gwaje-gwajen. Bugu da ƙari, metilformaldegid diyya DNA, game da shi, haddasa wata disproportionate jiki nauyi ci gaban da murdede tsarin, wanda aka haɗa tare da take hakkin gina jiki metabolism a cikin jiki. mai binciken na 800 shan barasa da aka gudanar, a cikin abin da masu bincike ƙarasa da cewa mutane da fallasa su acetaldehyde, akwai wani aibi a cikin gene daya enzyme - barasa dehydrogenase. Saboda wannan dalili, irin marasa lafiya ne a mafi girma hadarin tasowa ciwon daji na kodan da kuma sama na hanta.

aminci

The abu ne mai guba. Yana da wani contaminant na yanayi a lokacin shan taba ko exhausts a wuraren da cunkoso.