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US 12,630,572 B2Granted
Method for preparing sulfonated arylphosphine
AssigneeHanwha Solutions Corporation
InventorsGyeongseon Jeong, Shinbeom Lee, Junhee Han, Keedo Han
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Abstract
Provided is a method of preparing sulfonated aryl phosphine, the method capable of preparing sulfonated aryl phosphine with high purity and high yield by efficiently removing sulfur trioxide generated during preparing sulfonated aryl phosphine using an extractant.
Claims12
A method of preparing sulfonated aryl phosphine, comprising:
- performing sulfonation of aryl phosphine to obtain a reaction product comprising sulfonated aryl phosphine;
- performing a first extraction by adding a water-insoluble amine-based extractant into the reaction product comprising sulfonated aryl phosphine to obtain an organic phase comprising sulfonated aryl phosphine;
- bringing the organic phase into contact with an inert gas by stripping to remove sulfur trioxide in the organic phase;
- and
- performing a secondary extraction by adding a base extractant to the organic phase from which sulfur trioxide has been removed as a result of the above step,
- wherein the contact with inert gas is performed by a current flow contact using a stripper,
- the stripper comprises a packing column, and
- the packing column comprises 3 to 5 theoretical plates.
5 more elements
Dependencies are inferred from the claim text.