US 12,582,964 B2Granted

Purification of amines by adsorption using a super adsorbent

AssigneeDow Global Technologies LLC

InventorsYujun Liu, Xue Chen, Stephen W. King, Towhid Hasan, Jerrod Ruddick, James York, Amarnath Singh

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Abstract

The present invention describes a method to remove metals present in a mixture comprising one or more organic amines comprising the step of contacting the mixture with a silica-polyethyleneimine adsorbent.

Claims18

Dependent claims

A method to remove metal ions present in a mixture comprising one or more organic amines comprising the step of contacting the mixture with a silica-polyethyleneimine adsorbent.

Dependencies are inferred from the claim text.

Facts

Application: 18/260,872Filed 21 Mar 2022 · us provisional application
Priority: 23 Mar 2021
Published: US 2024/0066499 A129 Feb 2024
Granted: 24 Mar 2026
Term ends: Not estimatedThe source records don’t support an estimate.

Classification21 codes

B01D 15/08
Separating processes involving the treatment of liquids with solid sorbents; Apparatus therefor: selective adsorption, e.g. chromatography
B01D 15/1864
Relating to flow patterns: using two or more columns
B01D 15/02
Separating processes involving the treatment of liquids with solid sorbents; Apparatus therefor: with moving adsorbents
B01D 15/20
Characterised by constructional or operational features: relating to the conditioning of the sorbent material

Family

Application63/164,853Us provisional application · filed 23 Mar 2021
US 2024/0066499 A1Pre-grant publication · published 29 Feb 2024
US 12,582,964 B2This patent

From the US filing history. Foreign family members aren’t listed.

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