TXDTJSTRIAL FER:\rENTATTOXS 317 



1 /''^ 



(2) CHg.CO.C^OH > CH3.CHO + H.COOH 



(3) H.COOH > H2 -f CO2 



Part of the acetaldehyde is oxidised to acetic acid : — 



/OH 

 (4) CH3CHO -f H,0 — > CHgC^OH — > H2 + CH3COOH, 



and part condenses to give aldol, which by internal 

 rearrangement gives butyric acid : — 



OH 



-^ / 



(5) 2CH3.CHO->Cn3.CHOH.Cnj.CHO->CH,.CH = OH.C — On^CHj.CHz.CFj.COOH. 



4 \ 

 H 



The butyric acid is reduced by hydrogen formed in the 

 production of acetaldehyde and acetic acid, to give butyl 

 alcohol : — 



(6) CH3.CH2.CH2.COOH + 4H > CH3.CH2.CH2.CH0OH + H2O. 



Two molecules of acetic acid (formed according to 

 equation 4) condense to give aceto -acetic acid, which is 

 decarboxylated to give carbon dioxide and acetone : — 



OH OH 



^ \ / 



(7) CHsC + H— C.COOH -> CHjC— GH2.COOH -> CHaCO.CH2.COOH + H2O 



\ / \ I 



OHH OH CH3COCH3 + CO2 



The ethyl alcohol is formed as a side reaction by reduction 

 of acetaldehyde : — 



(8) CH3CHO + 2H > CH3CH0OH, 



