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US 11,028,045 B2Granted
Process for reducing CPI in a dinitrile stream
AssigneeINV Nylon Chemicals Americas, LLC
InventorChengbao Ni
Life of this patent
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Abstract
Disclosed is a process for removing 2-cyanocyclopentylideneimine (CPI) from a mixture containing CPI and dinitrile. The process comprises reacting CPI with an amine. The reaction may take place in the presence of water, and optionally, a catalyst. CPI is converted to products with a low volatility compared to the dinitrile.
Claims21
A process for removing at least a portion of CPI from a mixture comprising CPI and at least one dinitrile, said process comprising reacting CPI in the mixture with an amine, wherein the amine is an aliphatic or aromatic amine.
A method for removing CPI from dinitrile, the method comprising:
- reacting the CPI with an amine in the presence of a dinitrile, water and a catalyst to form a separable component;
- and
- separating at least a portion of the separable component from the dinitrile.
Dependencies are inferred from the claim text.