Hexahydrophthalic anhydride → 1(3H)-Isobenzofuranone,hexahydro-

HRID 1389400Notes

Reaction equation

HRID 1389400 reaction equation
[C:1]1(=O)[O:6][C:4](=[O:5])[CH:3]2[CH2:7][CH2:8][CH:9]=[CH:10][CH:2]12.C1(=O)OC(=O)C2CCCCC12>>[C:4]1([CH:3]2[CH:2]([CH2:10][CH2:9][CH2:8][CH2:7]2)[CH2:1][O:6]1)=[O:5]

Participants

3

Reactant 2

HCID 85689Hexahydrophthalic anhydrideHCID 127266013a,4,5,7a-Tetrahydro-2-benzofuran-1,3-dione

Product 1

HCID 3446531(3H)-Isobenzofuranone,hexahydro-

Procedure

Undiluted tetrahydrophthalic acid anhydride was continuously hydrogenated in the trickle phase over 3 liters of catalyst No. 3 at a pressure of 120 bar and a temperature of 95° C. A volume/time yield of 800 g per liter of catalyst an hour was achieved. 400 Nl of exhaust gas per hour were released from the separator. The yield of hexahydrophthalic acid anhydride was 99.2%. A small amount of hexahydrophthalide was formed as by-product.

Workup

  1. customa temperature of 95° C
  2. wait400 Nl of exhaust gas per hour were released from the separator

Sources & evidence

ORD record
ord-baa6c0aec94845b1abfc882a20b8d0a4
Source dataset
uspto-grants-1981_01
Patent number
US04244877

Reaction notes

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