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19 results about "Malononitrile" patented technology
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Malononitrile, also propanedinitrile or malonodinitrile, is a nitrile with the formula CH₂(CN)₂. Malononitrile is relatively acidic, with a pKₐ of 11 in water. In related chemistry, malononitrile is a suitable starting material for the Gewald reaction, where the nitrile condenses with a ketone or aldehyde in the presence of elemental sulfur and a base to produce a 2-aminothiophene.
Malononitrile purification method
ActiveCN112679385AReduce refining costsNo need to worry about cloggingCarboxylic acid nitrile purification/separationChemistryProcess engineering
The invention relates to the technical field of compound purification, and particularly discloses a malononitrile purification method. The purification method of malononitrile specifically comprises the step of separating malononitrile from a malononitrile crude product through adoption of a melt crystallization method. According to the malononitrile purification method provided by the invention, a vacuum system does not need to be arranged, the required temperature is relatively low, the energy consumption is reduced by 50% or above, the refining cost and refining time of malononitrile are greatly reduced, and the finally obtained malononitrile pure product has extremely high purity and yield.
Owner:HEBEI CHENGXIN +1