Patent · US Expired

Solvent Extractor

US4741806A · kind A · utility

7Cited by
9References
1Claims
0Family size

Assignee

Inventor

Key dates

Filing dateMar 21, 1984
Grant dateMay 3, 1988
Priority date
Expiry dateMar 21, 2004

Classification

  • Technology area (CPC C)Chemistry; Metallurgy
  • CPC primaryC10G1/04
  • WIPO fieldChemical engineering
  • WIPO sectorChemistry

Abstract

Supercritical extraction of diatomaceous earth results in a much more significant improvement in hydrocarbon recovery over Fischer retorting than achievable with tar sands. Process and apparatus for supercritical extraction of diatomaceous earth are disclosed.

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