Acetaldehyde. Anụ ahụ na thermal Njirimara. Nkwadebe na Jiri

Acetaldehyde (aha ndị ọzọ: acetaldehyde metilformaldegid, ethanal) - bụ ihe organic compound nke klas nke aldehydes. Nke a na umi bụ oké mkpa maka ụmụ mmadụ, ọ na-hụrụ na kọfị, achịcha, mfri eke mkpụrụ osisi na akwụkwọ nri. Synthesized site osisi. Ọ na-adị ndammana na-emepụta na nnukwu quantities mmadụ. Acetaldehyde usoro: CH3-Cho.

nkịtị Njirimara

1. Acetaldehyde - a colorless mmiri mmiri na-enwe a nkọ wetara ísì ụtọ.
2. Ọ bụ ngwa ngwa soluble na Eta, mmanya na mmiri.
3. The ezengwenri uka nke 44,05 grams / ahumachi.
4. The njupụta bụ 0,7 g / santimetr³.

thermal Njirimara

1. The agbaze ekwu bụ -123 degrees.
2. The esi ebe bụ 20 degrees.
3. The mgbanye okpomọkụ bụ hà -39 degrees.
4. The mgbanye okpomọkụ bụ 185 degrees.

Nkwadebe acetaldehyde

1. The isi usoro maka nkwadebe nke a umi bụ na ọxịdashọn nke ethylene (a na-akpọ Wacker usoro). Ọ anya dị ka a mmeghachi omume:
2CH2 = C2H4 (ethylene) + O2 (oxygen) = 2CH3CHO (metilformaldegid)

2. Ọzọkwa, acetaldehyde ike-emepụta site na hydration nke acetylene n'iru mercury salts (a na-akpọ mmeghachi omume Kucherova). Nke a na-enye a phenol bụ nke a na isomerized na aldehyde.

3. The eso usoro bụ na-ewu ewu tupu biakwa obibia nke n'elu usoro. Gburu site na ọxịdashọn ma ọ bụ dehydrogenation nke ethanol na a ọlaọcha ma ọ bụ ọla kọpa mkpali.

ngwa acetaldehyde

- mkpa acetaldehyde N'ihi nke bekee? Acetic acid, butadiene, aldehyde Polymers, na ụfọdụ ndị ọzọ organic bekee.
- eji dị ka a precursor (a umi na atụ ke mmeghachi omume na-eduga na ihe e kere eke nke a lekwasịrị umi) na acetic acid. Otú ọ dị, ebe ọ bụ na anyị na-atụle ihe ndị ahụ a umi anya kwụsịrị. Nke a mere n'ihi na acetic acid dị mfe ma dị ọnụ ala na-emepụta si METALON site n'ibu Kativa na Monsanto.
- Metilformaldegid - otu ihe dị mkpa precursor ka pentaerythritol, pyridine nkwekọrịta na krotonaldegidu.
- Nkwadebe nke resins n'ihi na eziokwu na urea na acetaldehyde nwere ikike ide ede.
- Nkwadebe nke ethylidene diacetate nke ekemende emepụta polyvinyl monomer (vinyl acetate).

Ụtaba na nduzi na acetaldehyde

Nke a na umi - a ịrịba òkè nke ụtaba anwụrụ ọkụ. ngosipụta ẹkenịmde-adịbeghị anya, ebe ọ na-e gosiri na synergistic mmekọrịta nke acetic acid na nicotine enwekwu okwu nke dabeere (karịsịa na mmadụ n'okpuru orú arọ na iri).

Alzheimer Disease na acetaldehyde

Ndị ndị na-adịghị nwere mkpụrụ ndụ ihe nketa na-akpata metilformaldegida akakabarede n'ime acetic acid, nwere a elu n'ihe ize ndụ nke pụrụ ịrịa ọrịa ndị dị ka senail mgbaka (ma ọ bụ ọrịa Alzheimer), nke na-emekarị agadi.

Mmanya na metilformaldegid

Presumably anyị na-atụle umi bụ carcinogenic ụmụ mmadụ, dị ka nke taa, e nwere ihe àmà nke carcinogenic acetaldehyde dị iche iche ụmụ anụmanụ nwere. Ọzọkwa, metilformaldegid emebi DNA, si otú na-eme a disproportionate arọ ahụ mmepe nke muscular usoro, nke e jikọtara ya na ndị mebiri nke protein metabolism ke idem. a na-amụ nke 800 aṅụrụma e ẹkenịmde, nke na-eme nnyocha kwubiri na ndị mmadụ gụrụ acetaldehyde, o nwere nkwarụ na site n'usoro maka otu enzyme - mmanya dehydrogenase. N'ihi nke a, ndị dị otú ahụ ndị ọrịa bụ ndị na nke ịrịa ọrịa cancer nke akụrụ na elu akụkụ nke imeju.

nchekwa

Umi bụ awu. Ọ bụ a contaminant nke ikuku n'oge ise siga ma ọ exhausts na mgbochi okporo ụzọ.