Citric Acid → Carbon Dioxide

HRID 411936Notes

Reaction equation

HRID 411936 reaction equation
[C:1](=O)([OH:3])[O-:2].[Na+:5].[C:6]([OH:18])(=[O:17])[CH2:7][C:8]([CH2:13][C:14]([OH:16])=[O:15])([C:10]([OH:12])=[O:11])[OH:9]>O>[C:6]([O-:18])(=[O:17])[CH2:7][C:8]([CH2:13][C:14]([O-:16])=[O:15])([C:10]([O-:12])=[O:11])[OH:9].[Na+:5].[Na+:5].[Na+:5].[C:1](=[O:3])=[O:2]

Participants

5

Reactant 2

HCID 311Citric AcidHCID 516892Sodium Bicarbonate

Product 2

HCID 280Carbon DioxideHCID 6224Trisodium citrate

Reagents, catalysts & solvents 1

HCID 962WaterSolvent3×

Procedure

The material selected for powder particles 16 should be inert with respect to the cellulosic material and reactive with respect to the moisture (e.g., water) to be absorbed. Preferably, the material selected for powder particles 16 should also generate water as a product of its chemical reaction with water. For example, if powder particles 16 comprise a mixture of sodium bicarbonate (NaHCO3) and citric acid (H3C6H5O7), a reaction of this mixture with water yields sodium citrate (Na3C6H5O7), carbon dioxide (CO2) and water (H2O). Another preferred example for powder particles 16 is a mixture of sodium bicarbonate (NaHCO3) and potassium hydrogen tartrate (KHC4H4O6). A reaction of this mixture with water yields potassium sodium tartrate (KNaC4H4O6), carbon dioxide and water. Note that any amount of water is sufficient to start the reaction. Once started, no additional water is needed as the reaction self-produces water.

Workup

  1. customto be absorbed
  2. customof its chemical reaction with water

Sources & evidence

ORD record
ord-43f1f1b0b80b44ccb3d822894fcb6a9f
Source dataset
uspto-grants-2003_05
Patent number
US06561023B2

Reaction notes

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