Method for extracting 1,5-pentanediamine from solution system containing 1,5-pentanediamine salt
US10759737B2 · kind B2 · utility
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13Claims
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Key dates
| Filing date | Sep 7, 2016 |
| Grant date | Sep 1, 2020 |
| Priority date | — |
| Expiry date | Sep 7, 2036 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC12P13/00
- WIPO fieldChemical engineering
- WIPO sectorChemistry
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.