Title:
MANUFACTURE OF 9,10-PHENANTHRENEQUINONE
Document Type and Number:
Japanese Patent JPS59157049
Kind Code:
A
Abstract:
Improvement of the yield and purity of phenanthrenequinone during its production by oxidation of phenanthrene by means of chromic acid in a sulfuric acidic medium is achieved by preparing a dispersion made up of phenanthrene, alkali dichromate and water at 95 DEG -100 DEG C., cooling said dispersion down to 80 DEG -85 DEG C. and carrying out the oxidation reaction under cooling and portion-wise addition of concentrated sulfuric acid in a temperature range between 80 DEG and 85 DEG C.
More Like This:
| WO/1984/004300 | PURIFICATION OF ALKYLATED ANTHRAQUINONES |
| JPS54133490 | SHELLY CATALYST AND ITS MANUFACTURE |
| JP3035113 | PROCESS TO CLEAVE POLYCYCLIC AROMATIC RING |
Inventors:
DEIITORITSUHI TONIUSU
BUORUFUGANGU BUAISU
BUINFURIITO ORUTO
HAINRITSUHI MIIRE
EMERITSUHI PASUTOREEKU
BUORUFUGANGU BUAISU
BUINFURIITO ORUTO
HAINRITSUHI MIIRE
EMERITSUHI PASUTOREEKU
Application Number:
JP2455984A
Publication Date:
September 06, 1984
Filing Date:
February 14, 1984
Export Citation:
Assignee:
RUETGERSWERKE AG
International Classes:
C07C50/16; C07C45/00; C07C46/04; C07C67/00; (IPC1-7): C07C46/04; C07C50/16
Attorney, Agent or Firm:
Toshio Yano
Previous Patent: JPS59157048
Next Patent: (5E)-13,14,18,18,19,19-HEXADEHYDRO-3-OXA-6A- CARBAPROSTAGLANDIN-I2 DERIVATIVES, MANUFACTURE AND HYPO...
Next Patent: (5E)-13,14,18,18,19,19-HEXADEHYDRO-3-OXA-6A- CARBAPROSTAGLANDIN-I2 DERIVATIVES, MANUFACTURE AND HYPO...