Malononitrile synthesis
- Product Name:Malononitrile
- CAS Number:109-77-3
- Molecular formula:C3H2N2
- Molecular Weight:66.06
Yield:109-77-3 95.14%
Reaction Conditions:
with sodium iodide in dimethyl sulfoxide at 150; for 15 h;Sealed tube;Inert atmosphere;Temperature;
Steps:
1; 3; 5 Example 5.
The front fraction collected in Example 3 was added to a pressure reactor, and 1200 g of dibromomethane, 15 g of sodium iodide, and 655 g of NaCN were sequentially added, and the pressure reactor was sealed, and the system was heated to 150 ° C under stirring.After the temperature and pressure of the system were stabilized, the temperature was timed for 15 h.After the reaction is completed, the temperature is lowered, solid-liquid separation, and solid sodium bromide is recovered. The filtrate was collected in a rectification bottle and directly subjected to vacuum distillation. The front fraction was collected and used, and 420.0 g of the normal fraction of 85-95 ° C (4 to 8 mmHg) was collected, which was the target product malononitrile, and the yield was 95.14%. . The purity of the product was determined by the GC method to be 99.60%.
References:
CN109232313,2019,A Location in patent:Paragraph 0034-0037; 0042-0045; 0050-0052
107-91-5
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109-77-3
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109-77-3
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109-77-3
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