| 1 | Caffeine is removed by directly soaking the materials in the methylene chloride . | |
| 2 | The application of solid base in drying recovered dichloromethane was introduced. | |
| 3 | Meanwhile, the increase of domestic investment of dichloromethane was also lower than that of the quantity under domestic demands. | |
| 4 | Methylene chloride was used as extractant in the extraction of condensed liquid and 3% sodium carbonate solution was used in acid separation. | |
| 5 | The variation of the desorption activation energy of dichloromethane on activated carbons was discussed with the help of the hard soft acid base(HSAB) princi. |
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