Document Type and Number:
Japanese Patent JPS5210831
Kind Code:
B1
Abstract:
1397275 Naphthoquinone NIPPON STEEL CHEMICAL CO Ltd 18 July 1972 [21 July 1971] 33597/72 Heading C2C [Also in Division B1] Naphthoquinone is made by the vapour phase oxidation of naphthalene with molecular oxygen in the presence of a catalyst comprising SiO 2 , V 2 O 5 , K 2 SO 4 and a boron compound in an amount of 30-300 wt. per cent reckoned as B 2 O 3 and based on the weight of the V 2 O 5 . Oxygen may be supplied as air and the reaction conditions may include a space velocity of 300- 2000 hr-1 , a concentration of naphthalene in the gaseous mixture of 30-50 g./m.3 and a temperature of 290-430 C.
Application Number:
JP5387671A
Publication Date:
March 26, 1977
Filing Date:
July 21, 1971
Export Citation:
International Classes:
B01J27/055; C07C46/04; (IPC1-7): B01J27/02
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