单词	acetal
释义	acetal /ˈasɪtal / noun Chemistry An organic compound formed by the condensation of two alcohol molecules with an aldehyde molecule. Acetals have the general formula R1CH(OR2)2, where R1 and R2 are alkyl groups. Water, ethanol, volatile organic acids, aldehydes, esters, acetals, and ketones, many of them powerfully aromatic, are among the azeotrope components in wines.... Experience in distilling aldehydes led us to believe that acetaldehyde would form acetals in the overheads of the low pressure column. The researchers have used supercritical CO 2 as medium for the conversion of alcohols to linear and branched ethers, to cyclic ethers, to aryl ethers and to acetals and ketals in good yields and, all-importantly, with high selectivities. Origin Mid 19th century: from acetic acid + al from alcohol.
随便看	no-talent notalgia paraesthetica notalgia paresthetica Notalian not a little not all that —— notam not a moment too soon NOT AND notandum not a patch on notaphilic notaphilist notaphily not a pretty sight not a proposition Notar notarial notarial act notarially notariate notaricon notarikon notariqon notarisation

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