Oxidative refining of naphthalene
A new method for refining naphthalene has been developed at VUKhIN; it uses no acid, produces no useless processing wastes and increases the naphthalene yield ratio. In brief, the method consists in treating the naphthalene fraction with ozonized air in the presence of 2 to 3% of an additive (crude anthracene or pitch). The additive enhances the ozone utilization factor, particularly towards the end of the refining cycle. Ozone has a specific action on unsaturated compounds (indole, indene and their derivatives) and the oxidation rate is very high. Under the processing conditions there is no significant reaction between ozone and naphthalene, methylnaphthalenes or thionaphthene. This new naphthalene refining process for Eastern feedstocks produces no plant wastes and gives a product after distillation that can be used for phthalic anhydride production. The oxidative refining process raises the naphthalene recovery ratio to about 92% of that available in the feedstock.
- OSTI ID:
- 5480845
- Journal Information:
- Coke Chem., USSR (Engl. Transl.); (United States), Journal Name: Coke Chem., USSR (Engl. Transl.); (United States) Vol. 12; ISSN COKCA
- Country of Publication:
- United States
- Language:
- English
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