Alkyllithium process
AssigneeFMC Corporation
InventorsJames A. Schwindeman, Robert C. Morrison, B. Troy Dover, John F. Engel, Conrad W. Kamienski, Randy W. Hall, Douglas E. Sutton
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Abstract
A high temperature process for producing alkyllithium compounds in high yields of at least 90% and high purity comprising reacting, in a liquid hydrocarbon solvent, an alkyl halide containing 3 to 16 carbon atoms and mixtures thereof with lithium metal particles of less than 300 microns in size at a temperature between 35.degree. and 125.degree. C. and recovering the alkyllithium compound.
Claims14
In the process for producing alkyllithium compounds by reacting in a liquid hydrocarbon solvent selected from liquid saturated aliphatic hydrocarbons containing 5 to 12 carbon atoms, saturated liquid cycloaliphatic hydrocarbons containing 5 to 12 carbon atoms and liquid aromatic hydrocarbons containing 6 to 12 carbon atoms and mixtures thereof, an alkyl halide containing 3 to 16 carbon atoms with lithium metal particles of less than 300 microns in size in which the improvement consists of producing the alkyllithium compounds in high yields of at least 90% and high purity, containing less than 300 ppm dissolved lithium halide, by conducting the reaction under conditions selected from:
- conducting the reaction under reflux conditions in hydrocarbon solvents which reflux at temperatures between 50.degree. C. and 100.degree. C.;
- and conducting the reaction under non-reflux conditions at temperatures between 50.degree. C. and 125.degree. C. and recovering the alkyllithium compound.
An alkyllithium composition consisting of alkyllithium compound of high purity, containing 3 to 16 carbon atoms, in a liquid hydrocarbon solvent selected from liquid saturated aliphatic hydrocarbons containing 5 to 12 carbon atoms, saturated liquid cycloaliphatic hydrocarbons containing 5 to 12 carbon atoms and liquid aromatic hydrocarbons containing 6 to 12 carbon atoms containing 3 to 16 carbon atoms and mixtures thereof, and containing less than 300 ppm dissolved lithium halide.
Dependencies are inferred from the claim text.