Concentrated, stable alkali alkoxide solutions
AssigneeChemetall GmbH
InventorsDirk Dawidowski, Ute Emmel, Wilfried Weiss, Ulrich Wietelmann
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Abstract
Concentrated, stable solutions of alkali metal alkoxides ROM, which consist of an alkali metal cation and a secondary or tertiary alcohol residue, in aprotic solvents are described, wherein, relative to alkoxide content, the solutions contain at least 1.0 and at most 15 mol % of alkali metal hydroxide M′OH and at most 1.0 mol % of free alcohol R—OH, wherein R is a secondary or tertiary alkyl residue and wherein M and M′ are mutually independently Li, Na, K, Rb or Cs. A process for the production of the solution and the use thereof are also described.
Claims16
A solution of an alkali alkoxide of the formula ROM comprising
- an alkali metal cation and a secondary or tertiary alcohol residue in an aprotic solvent, wherein relative to alkoxide content, the solution contains at least 1.0 to not greater than 15 mol % of alkali metal hydroxide M′OH and not greater than 1.0 mol % of free alcohol R—OH, wherein R is a secondary or tertiary alkyl residue having 3 to 20° C. atoms and wherein M and M′ are a metal independently selected from the group consisting of Li, Na, K, Rb and Cs.
A process for the production of an alkoxide solution containing alkali metal hydroxide comprising dissolving a mixture of at least one of a secondary or tertiary alkali alkoxide of formula ROM and an alkali metal hydroxide M′OH in an aprotic solvent and post-drying the solution, wherein relative to alkoxide content, the solution contains at least 1.0 to not greater than 15 mol % of alkali metal hydroxide M′OH and not greater than 1.0 mol % of free alcohol R—OH, wherein R is a secondary or tertiary alkyl residue having 3 to 20° C. atoms and wherein M and M′ are a metal independently selected from the group consisting of Li, Na, K, Rb and Cs.
A process for the production of an alkoxide solution of an alkali alkoxide of formula ROM comprising reacting a mixture comprising at least one of water and alkali metal hydroxide, a secondary or tertiary alcohol and an aprotic solvent with a metalation agent, wherein the metalation agent is selected from the group consisting of an alkali metal, an alkali metal hydride, an alkali metal amide and an organoalkali metal compound, wherein relative to alkoxide content, the solution contains at least 1.0 to not greater than 15 mol % of alkali metal hydroxide M′OH and not greater than 1.0 mol % of free alcohol R—OH, wherein R is a secondary or tertiary alkyl residue having 3 to 20° C. atoms and wherein M and M′ are a metal independently selected from the group consisting of Li, Na, K, Rb and Cs.
Dependencies are inferred from the claim text.