O-Xylene → Naphthalene

HRID 542580Notes

Reaction equation

HRID 542580 reaction equation
[C:1]1(=[O:7])[O:6][C:4](=[O:5])[CH:3]=[CH:2]1.[C:8](O)(=O)/[CH:9]=[CH:10]\[C:11](O)=O.[CH3:16][C:17]1[CH:18]=[CH:19][CH:20]=[CH:21][C:22]=1[CH3:23]>>[C:4]1(=[O:5])[O:6][C:1](=[O:7])[C:2]2=[CH:8][CH:9]=[CH:10][CH:11]=[C:3]12.[CH:21]1[C:22]2[C:17](=[CH:16][CH:1]=[CH:2][CH:23]=2)[CH:18]=[CH:19][CH:20]=1

Participants

5

Reactant 3

HCID 7237O-XyleneHCID 7923Maleic Anhydride2×HCID 444266Maleic Acid

Product 2

HCID 931NaphthaleneHCID 6811Phthalic Anhydride

Procedure

Maleic anhydride has been generally prepared by concentration and dehydration of an aqueous solution of maleic acid, which is obtained by absorbing in water, in an apparatus such as a scrubber, a gas containing maleic anhydride, formed by catalytic oxidation of benzene, or gaseous by-products containing maleic anhydride, formed during the production of phthalic anhydride by catalytic oxidation of o-xylene or naphthalene.

Workup

  1. customwhich is obtained
  2. customby absorbing in water, in an apparatus such as a scrubber
  3. additiona gas containing maleic anhydride
  4. customformed by catalytic oxidation of benzene, or gaseous by-products

Sources & evidence

ORD record
ord-d1e32b241aaf44b5a16d38d882190d55
Source dataset
uspto-grants-1987_04
Patent number
US04658042

Reaction notes

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