Patent · US Expired

Coal dewatering

US4853133A · kind A · utility

1Cited by
7References
8Claims
0Family size

Assignee

Inventors

Key dates

Filing dateDec 10, 1987
Grant dateAug 1, 1989
Priority date—
Expiry dateDec 10, 2007

Classification

  • Technology area (CPC B)Performing Operations; Transporting
  • CPC primaryB01D21/267
  • WIPO fieldChemical engineering
  • WIPO sectorChemistry

Abstract

The water content of wet small coal is reduced by adding a defined amount of an ionic surfactant, centrifuging, and adding a foam suppressing amount of a cationic organic compound to the aqueous effluent from the centrifugation step.

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