Citric Acid → Citric Acid

HRID 2071221Notes

Reaction equation

HRID 2071221 reaction equation
C(O)(=O)CC(O)=[O:4].[C:8]([OH:16])(=[O:15])[CH:9]([CH2:11][C:12]([OH:14])=[O:13])[OH:10].C(O)(=O)/C=C\C(O)=O.[C:25]([OH:37])(=[O:36])[CH2:26][C:27]([CH2:32][C:33]([OH:35])=[O:34])([C:29]([OH:31])=[O:30])[OH:28]>>[C:8]([OH:16])(=[O:15])[CH:9]([CH:11]([C:12]([OH:14])=[O:13])[OH:4])[OH:10].[C:25]([OH:37])(=[O:36])[CH2:26][C:27]([CH2:32][C:33]([OH:35])=[O:34])([C:29]([OH:31])=[O:30])[OH:28]

Participants

6

Reactant 4

HCID 311Citric AcidHCID 525Malic AcidHCID 867Malonic AcidHCID 444266Maleic Acid

Product 2

HCID 311Citric AcidHCID 8752,3-Dihydroxybutanedioic Acid

Procedure

Aged (and brittle) carboxylated cellulose, malonic acid, malic acid and maleic acid each was separately reacted with ZnO to produce adhesive material followed by formation of hard cement in a way similar to that with citric acid. One sample of tartaric acid, however, did not yield a "stringy" adhesive mass like with citric acid but it was found that this sample of tartaric acid was somewhat slow to wet in spite of being very soluble. In general it appears that polycarboxylic acids that are readily (quickly) soluble, considerably soluble and quickly wet show reaction with ZnO as does citric acid.

Workup

  1. customeach was separately reacted with ZnO
  2. customto produce adhesive material

Sources & evidence

ORD record
ord-945045d906d342c6a31637382783829b
Source dataset
uspto-grants-1977_09
Patent number
US04046578

Reaction notes

Loading…