Process for preparing triorgano borates with low alcohol content
The present invention provides a process for preparing triorgano borates with low alcohol content.
1. A process for preparing triorgano borates with an alcohol content of below 0.1 wt %, comprising the step of bringing a triorgano borate into contact with at least one alkali metal at temperatures below 150° C.
2. A process according to claim 1 , comprising the step of bringing a triorgano borate into contact with sodium-potassium-alloy at a temperature between 0 and 35° C.
3. A process according to claim 1 , comprising further the step of distilling out the triorgano borate.
4. A triorgano borate with an alcohol content of below 0.1 wt %.
5. A process according to claim 2 , comprising further the step of distilling out the triorgano borate.
6. A process according to claim 1 , wherein the triorgano borate is brought into contact with at least one alkali metal for a period of between 1 and 12 hours.
7. A process according to claim 1 , wherein said at least one alkali metal is lithium, sodium, potassium, rubidium or cesium.
8. A process according to claim 1 , wherein said triorgano borate is a compound of the formula
B(OR 1 )(OR 2 )(OR 3 )
wherein R 1 , R 2 and R 3 are the same or different organyl groups or wherein two of the groups R 1 , R 2 and R 3 can also be connected to form a divalent organyl group that forms together with the BO 2 moiety, a cyclic structure.