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gjrgogogo

金虫 (正式写手)

[交流] 讨论:工业上,羧酸还原为醇的主要有哪几种方法?

求助各位前辈,在工业上,直链上的羧酸还原为伯醇的主要有哪几种方法,而且对直链中的碳碳双键不影响?
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princewye

银虫 (小有名气)

我记得好像是在什么溶液中用金属Na去还原就可以了。
2楼2008-02-26 12:21:50
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princewye

银虫 (小有名气)

★
fangyuan2004(金币+1,VIP+0):感谢应助!
The different methods used in the production of fatty alcohols from various sources are
(1) hydrolysis of wax esters using animal fats,
(2) sodium reduction process using fats and oils,
(3) Ziegler process using ethylene,
(4) oxo process using olefins,
(5) catalytic hydrogenation of fatty acids and methyl esters from fats and oils, and
(6) direct hydrogenation of fats and oils.
3楼2008-02-26 12:25:14
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gjrgogogo

金虫 (正式写手)

谢谢princewye,我希望可以实现工业放大,
我的原料是十一烯酸,想直接一步转换为十一烯醇
4楼2008-02-26 13:02:51
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princewye

银虫 (小有名气)

另一篇文献中提到:
Production of Fatty Alcohols
Triacylglycerols, fatty acids, and esters can be reduced to aldehydes, alcohols, or
hydrocarbons, the main application being the production of fatty alcohols. On a
small scale, lithium aluminum hydride (in excess of stochiometric requirement)
is a convenient reducing agent for the carboxyl group without affecting polyunsaturated
chains. Industrially, catalytic hydrogenation is used and has been reviewed
5楼2008-02-26 15:25:32
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gjrgogogo

金虫 (正式写手)

谢谢!LiAlH4太贵了,用不起;催化氢化条件太苛刻,而且产率也不高!不过还是挺谢谢princewye的
6楼2008-02-27 15:24:57
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