Patent · US Expired

Process for producing Al-containing non-Mg-anionic clay

US6440888B1 · kind B1 · utility

6Cited by
20References
12Claims
0Family size

Assignee

Inventors

Key dates

Filing dateAug 11, 2000
Grant dateAug 27, 2002
Priority date—
Expiry dateOct 7, 2020

Classification

  • Technology area (CPC C)Chemistry; Metallurgy
  • CPC primaryC01P2002/22
  • WIPO fieldChemical engineering
  • WIPO sectorChemistry

Abstract

This patent describes economical and environment-friendly processes for the synthesis of Al-containing non-Mg anionic clays. It involves hydrothermally reacting a slurry comprising a divalent metals source with a trivalent metals source to directly obtain Al-containing non-Mg anionic clay, at least one of the metal sources being an oxide, hydroxide or a carbonate. There is no necessity to wash or filter the product. It can be spray dried directly to form microspheres or can be extruded to form shaped bodies. The product can be combined with other ingredients in the manufacture of catalysts, absorbents, pharmaceuticals, cosmetics, detergents, and other commodity products that contain anionic clays.

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