Method of preparing quaternary ammonium hydroxide and quaternary ammonium carbonate in an aminoalcohol solvent

This invention provides a method of preparing a quaternary ammonium hydroxide compound having the formula (NR1R2R3R4)OH, wherein R1 and R2 are independently C1-C4 alkyl; R3 is benzyl or a C1-C20 alkyl or a C1-C20 aryl-sutstituted alkyl; R4 is a C8-C20 alkyl. The method includes the step of reacting...

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Bibliographic Details
Main Authors WALKER LEIGH E, TSENG CHUEN
Format Patent
LanguageEnglish
Published 06.06.2006
Subjects
ACYCLIC OR CARBOCYCLIC COMPOUNDS
CHEMISTRY
METALLURGY
ORGANIC CHEMISTRY
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Summary:This invention provides a method of preparing a quaternary ammonium hydroxide compound having the formula (NR1R2R3R4)OH, wherein R1 and R2 are independently C1-C4 alkyl; R3 is benzyl or a C1-C20 alkyl or a C1-C20 aryl-sutstituted alkyl; R4 is a C8-C20 alkyl. The method includes the step of reacting a quaternary ammonium compound having the formula (NR1R2R3R4)+X-, wherein R1, R2, R3, and R4 are as defined above and X is Br or Cl, with a metal hydroxide in an aminoalcohol solvent to yield the quaternary ammonium hydroxide. The reaction forms metal bromide and/or metal chloride as a byproduct. The metal byproducts and excess metal hydroxide (if any) can be removed by methods known in the art. According to one preferred embodiment, the reaction of the quaternary ammonium compound with the metal hydroxide is performed in an anhydrous environment (i.e., with no water present).
Bibliography:Application Number: US20030705215