Method for extracting 1,5-pentanediamine from solution system containing 1,5-pentanediamine salt
AssigneesCathay R&D Center Co., Ltd., Cathay Industrial Biotech Ltd.
InventorsXiucai Liu, Bingbing Qin, Chen Yang
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Abstract
Provided is a method for extracting a 1,5-pentanediamine from a solution system containing a 1,5-pentanediamine salt. The method comprises adding to the solution system an insoluble basic substance to form a solution system containing free 1,5-pentanediamine. The provided method has high applicability, is easy to use, and is environmentally-friendly, significantly lowering raw material costs and operating costs for the entire manufacturing process. The method achieves a high recovery rate for pentanediamine, and is more suitable for industrial-scale production.
Claims18
1-12. (canceled)
A method for extracting 1,5-pentanediamine from solution system containing 1,5-pentanediamine salt, wherein a basic substance is added to the solution system to form a solution system containing free 1,5-pentanediamine;
- wherein, said 1,5-pentanediamine salt comprises at least one or more of sulfate, carbonate, and phosphate of 1,5-pentanediamine;
- said basic substance comprises at least one or more of solid calcium hydroxide, magnesium hydroxide, calcium oxide, and magnesium oxide.
Dependencies are inferred from the claim text.