| 摘要 |
1. A method of obtaining adipic acid in the process of oxidizing cyclohexanol or its mixtures with cyclohexanone with nitric acid, and further by crystallizing the product for several times, characterized in that water is extracted from the waste crystallization liquors in two stages.4. A method of obtaining adipic acid in the process of oxidizing cyclohexanol or its mixtures with cyclohexanone with nitric acid, and further by crystallizing the product for several times, characterized in that 5-50 percent of the technological stream containing water, nitric acid and adipic, glutaric and succinic acids is entered into a column, in whose top evaporation part the stream is condensed, and then it flows down to the bottom part and contacts in a counter-current manner with steam.
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