:Creighton process
The Creighton process involves the hydrogenation of a 6 carbon chain aldehyde.H. I. Creighton, Trans. Electrochem. Soc. 75, 301 (1939){{cite book|title= Chemistry of The Carbohydrates |isbn= 9780323142656 |page= 238 |publisher= Elsevier |year= 2012 }} The reactant is 2,3,4,5,6-pentahydroxyhexanal (an aldehyde) and the product is 1,2,3,4,5,6-hexanehexol (an alcohol). The product thus has two more hydrogen atoms than the reactant: -CHO is replaced by -CH2OH.
The Creighton process was patented in the 1920s.US Patents 1712951 and 1712952