Oxygen → Gluconic Acid

HRID 850691Notes

Reaction equation

HRID 850691 reaction equation
[CH2:1]([OH:12])[C@H:2]1[O:8][C:6](=[O:7])[C@H:5]([OH:9])[C@@H:4]([OH:10])[C@@H:3]1[OH:11].[OH-:13].[Na+].O=O>O>[O:7]=[C:6]([OH:8])[C@@H:5]([C@H:4]([C@@H:3]([C@@H:2]([CH2:1][OH:12])[OH:13])[OH:11])[OH:10])[OH:9]

Participants

5

Reactant 3

HCID 977Oxygen3×HCID 7027delta-GluconolactoneHCID 14798Sodium Hydroxide

Product 1

HCID 10690Gluconic Acid

Reagents, catalysts & solvents 1

HCID 962WaterSolvent

Procedure

50.0 g of gluconolactone is dissolved in 950 ml demineralised water. The pH is adjusted to 6.0 with 25 g of a 45% w/w sodium hydroxide solution. The solution is heated to 55° C. under nitrogen, until no more oxygen is detected. 6.35 g of the prepared Pb/Pt/C catalyst (ratio Pt/Pb 5/2) is added and the suspension is stirred at 1300 rpm for another 10 minutes under nitrogen. The reaction is started by switching from nitrogen to oxygen (maximum 10% oxygen in the mixture). The reaction is continued without further pH control. The reaction is stopped after 2.5 hours reaction time.

Workup

  1. waitThe reaction is stopped after 2.5 hours
  2. customreaction time

Sources & evidence

ORD record
ord-6f37a574b026413db7d31785331396a1
Source dataset
uspto-grants-2000_01
Patent number
US06018034

Reaction notes

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