Process for separating trimethylolpropane and water soluble...

Details Process for separating trimethylolpropane and water soluble... Process for separating trimethylolpropane and water soluble...

C - Chemistry, Metallurgy

07

C

C07C 31/22 (2006.01) B01D 61/42 (2006.01) B01D 61/44 (2006.01) C07C 29/74 (2006.01) C07C 29/76 (2006.01) C07C 67/08 (2006.01) C07C 69/54 (2006.01) C07C 69/58 (2006.01)

Patent

CA 2280541

The invention relates to a process for separating trimethylol-propane and a water-soluble salt from a solution thereof using electrodialysis. The solution is typically a crude product originating from an aldol addition of formaldehyde to butyraldehyde followed by a Cannizzaro reaction in the presence of an alkali metal hydroxide and contains trimethylolpropane, hydroxy functional byproducts and an alkali metal formate. The process does not use an organic solvent and may produce trimethylolpropane that is not colored and can be processed directly without further purification.

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