Patent · US Expired

Removal of impurities from amines

US4661634A · kind A · utility

8Cited by
2References
29Claims
0Family size

Assignee

Inventors

Key dates

Filing dateSep 16, 1985
Grant dateApr 28, 1987
Priority date—
Expiry dateSep 16, 2005

Classification

  • Technology area (CPC Y)Emerging Cross-Sectional Technologies
  • CPC primaryY02P10/20
  • WIPO fieldMaterials, metallurgy
  • WIPO sectorChemistry

Abstract

Particles, fibers, or filaments of alkali salts of ethylene/carboxylic acid copolymers or terpolymers, especially in highly porous form, are employed in removing contaminants from tertiary amines or quaternary amine salts, especially metal contaminants.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.