Sulfuric Acid → Naphthalene

HRID 465704Notes

Reaction equation

HRID 465704 reaction equation
[CH:1]1[CH:2]=[CH:3][C:4]2[C:11](=O)[CH:10]=[CH:9][C:7](=O)[C:5]=2[CH:6]=1.C1(=O)OC(=O)C2=CC=CC=C12.S(=O)(=O)(O)O>>[CH:6]1[C:5]2[C:4](=[CH:11][CH:10]=[CH:9][CH:7]=2)[CH:3]=[CH:2][CH:1]=1

Participants

4

Reactant 3

HCID 1118Sulfuric AcidHCID 6811Phthalic AnhydrideHCID 85301,4-Naphthoquinone

Product 1

HCID 931Naphthalene

Procedure

The foregoing and other objects of the present invention have been attained by separating naphthoquinone having a purity of higher than 95% and phthalic acid from an aqueous slurry prepared by contacting a reaction mixture gas containing naphthoquinone, phthalic anhydride and sulfuric acid formed by a catalytic vapor phase oxidation of naphthalene with an aqueous medium, by adjusting the pH of the aqueous slurry to 1.2 to 5 and extracting the aqueous slurry with a chain or cyclic saturated hydrocarbon at 60° to 110° C. under the condition of substantially dissolving phthalic acid in the aqueous phase thereby separating a naphthoquinone solution phase, an aqueous phthalic acid solution phase and a resinous material phase.

Workup

  1. customby separating naphthoquinone having a purity of higher than 95% and phthalic acid from an aqueous slurry
  2. customprepared

Sources & evidence

ORD record
ord-7c27baae8de04de6b3bbaf7b468a3a50
Source dataset
uspto-grants-1992_10
Patent number
US05153339

Reaction notes

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