Hydrolysis method for lithium slag from lithium alkyl synthesis

Abstract

This invention provides one hydrolysis method to synthesize lithium alkyl, which comprises the following steps: containing the lithium powder filtered by lithium alkyl into its buffer tar; then pressing the lithium powder into hydrolysis tar through lithium powder metering pump to react with large amount of water under temperature of sixty degrees to control lithium powder quantative through hydrolysis temperature; the reaction temperature can be taken away by cooling water and thehydrocarbon solvent sent out are recycled by air condensation device. The method can prevent super heat without large range wave to realize the industry automatic control.

Description

technical field [0001] The invention relates to a method for hydrolyzing lithium slag obtained by synthesizing alkyllithium. Background technique [0002] The synthesis of alkyllithium uses chlorinated alkanes and metal lithium sand to react in a hydrocarbon solvent, and the mixed solution of alkyllithium obtained by the reaction is settled and filtered to remove lithium nitride, lithium chloride and lithium chloride contained in the mixed solution. The coated fine metal lithium particles and other solid insoluble matter, the solid insoluble matter and the cyclohexane mixture containing alkyllithium, white oil, etc. are commonly called lithium slag. In the current production process of alkyllithium, there is no efficient and safe method to deal with the lithium slag generated in the production process of alkyllithium. In the prior art, the lithium slag hydrolysis method is to collect the lithium slag obtained after the alkyl lithium is filtered and produced into the hydroly...

AI Technical Summary

Problems solved by technology

The second temperature increase and pressure increase are mainly due to the fact that during the first temperature increase and pressure increase period, in addition to the reaction of the added water with the alkyllithium, a small amount of water is still continuously dissolving the lithium chloride on the surface of the metal lithium. When the lithium chloride dissolves When it reaches a certain level, a large amount of metal lithium coated with lithium chloride will suddenly be exposed to water, and react with water rapidly, thereby causing a second temperature rise and pressure increase phenomenon, although the duration of this process is only 5 seconds~ 10 seconds, but the temperature and pressure rise rapidly, and the temperature rise can reach 10°C / S-15°C / S. Once out of control, the reaction temperature can exceed 100°C, far exceeding the boiling point of the hydrocarbon solvent in the lithium slag, resulting in a large amount of The solvent evaporates, and the pressure of the hydrolysis kettle rises sharply

In the end, the flammable gas breaks through the weak parts of the kettle body, and flashes in the space, resulting in personal injury accidents

Therefore, there are serious unsafe factors in this method

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