英语翻译
Othersecondaryalcoholsyieldketonesonoxidationinthesamewayasiso-prypylalcohol:
(b)Distillationofcalciumacetate.Acetoneisproducedwhendrycalciumacetateisheated,
Theacetoneevolvediscondensedandcollected.Itisthenpurifiedbyheatingwithsodiumbisulphitesolution(p.142).
Theformationofaketonebyheatingthecalciumsaltofafattyacidisaquitegeneralreaction,e.g.
buttheyieldofketoneisnotalwaysveryhigh.
(c)Fromwood.Alittleacetoneisobtainedfromthepyroligneousacidobtainedwhenwoodisheated(p.103).Thepyroligneousacidalsocontainsaceticacidwhichcanbeconvertedintocalciumacetate,fromwhichacetonecanbeobtainedasin(b).Woodisnotnowadays,how-ever,animportantsourceofacetone.
(d)Fermentationofstarch.Starchcanbedecomposedintoamixtureofacetone,n-butylalcohol,carbondioxideandhydrogenbyavarietyofdifferentbacteria,e.g.clostridumacetobutylicum.Alltheproductsareofuse,sothatthisisavaluableindustrialprocess.Poorqualitygrainisusedasthesourceofstarch,andacultureofthespecialbacteriumisaddedtoit,