2-Sulfobenzoic acid → 3-Hydroxybenzoic Acid

HRID 1074639Notes

Reaction equation

HRID 1074639 reaction equation
S([C:5]1[CH:13]=[CH:12][CH:11]=[CH:10][C:6]=1[C:7]([OH:9])=[O:8])(O)(=O)=O.[OH-:14].[Na+]>>[OH:14][C:13]1[CH:5]=[C:6]([CH:10]=[CH:11][CH:12]=1)[C:7]([OH:9])=[O:8]

Participants

3

Reactant 2

HCID 124382-Sulfobenzoic acidHCID 14798Sodium Hydroxide

Product 1

HCID 74203-Hydroxybenzoic Acid

Procedure

The sulphobenzoic acid melt is pumped or injected under pressure, for example into previously taken molten 60 to 90% strength sodium hydroxide solution, in the course of which, merely by utilizing the heat thus liberated, the reaction temperature of, for example, 260° to 370° C. is reached, which is advantageous for the subsequent reaction to give 3-hydroxybenzoic acid. If it is intended to achieve, in this process variant, a limitation of the simultaneous increase in pressure, this can be effected by blowing off steam.

Workup

  1. temperatureheat thus
  2. customfor example, 260° to 370° C.
  3. customwhich is advantageous for the subsequent reaction

Sources & evidence

ORD record
ord-6ef3ee84ddf84aa0a36f89900915aff3
Source dataset
uspto-grants-1983_07
Patent number
US04393234

Reaction notes

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