Carbon Dioxide → 4-Hydroxybenzoic Acid

HRID 1460854Notes

Reaction equation

HRID 1460854 reaction equation
[C:1]1([O-:7])[CH:6]=[CH:5][CH:4]=[CH:3][CH:2]=1.[K+].C1(C)C([C:16]([O-:18])=[O:17])=CC=CC=1O.[K+].C(=O)=O>>[OH:7][C:1]1[CH:6]=[CH:5][C:4]([C:16]([OH:18])=[O:17])=[CH:3][CH:2]=1

Participants

4

Reactant 3

HCID 280Carbon DioxideHCID 23670670Potassium phenoxide2×HCID 70420683Potassium cresolate2×

Product 1

HCID 1354-Hydroxybenzoic AcidYield 79.6%

Procedure

A pressure vessel was charged with 6.65 grams of potassium phenolate and 7.40 grams of potassium ortho-cresolate both in dry powder form. With stirring, reaction was carried out at a carbon dioxide pressure of 7 kg/cm2 (G) and 220° to 240° C. for ten minutes. The equimolar mixture of potassium phenolate and potassium ortho-cresolate has a eutectic point of 209° C. in peak value as measured by differential thermal analysis (same throughout the examples). An analysis of the product at the end of reaction showed a para-hydroxybenzoic acid yield of 79.6% on the basis of the potassium phenolate.

Workup

  1. customreaction
  2. customa eutectic point of 209° C.
  3. customAn analysis of the product at the end of reaction

Sources & evidence

ORD record
ord-2f75abd149884cd7be99d674b93918ab
Source dataset
uspto-grants-1991_12
Patent number
US05072036

Reaction notes

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