Phthalic Acid → Naphthalene

HRID 1277327Notes

Reaction equation

HRID 1277327 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.C(O)(=O)C1C(=CC=CC=1)C(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 2

HCID 1017Phthalic Acid3×HCID 85301,4-Naphthoquinone2×

Product 1

HCID 931Naphthalene

Reagents, catalysts & solvents 1

HCID 962WaterSolvent

Procedure

A scale deposition from an aqueous slurry of naphthoquinone and phthalic acid can be prevented by adding fine crystals of phthalic acid to the aqueous slurry of naphthoquinone and phthalic acid collected, which slurry is obtained by contacting a gas resulting from a catalytic gas phase oxidation of naphthalene with water or a mother liquor recycled. The fine crystals of phthalic acid have diameters of less than 100μ, preferably 10 to 40μ, and can be in an aqueous slurry of phthalic acid pulverized by a pulverizer.

Workup

  1. customcollected
  2. customwhich slurry is obtained

Sources & evidence

ORD record
ord-72de2bfe56144821bc024d429b050186
Source dataset
uspto-grants-1981_07
Patent number
US04277257

Reaction notes

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