How can I convert dialkyl ammonium chloride to dialkyl amine efficiently?

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Federico Cisnetti

I don't know if I understood well your question but the answer seems quite simple to me. Just treat the dialkyl ammonium chloride with a strong base such as NaOH. You will deprotonate quantitatively the amine. Then you could extract it in an organic solvent such as dichloromethane.