Title:
【発明の名称】酸化物における残留塩素の減少
Document Type and Number:
Japanese Patent JPH11503401
Kind Code:
A
Abstract:
A process for reducing the residual chloride present in iron oxides, particularly in regenerated iron oxides produced from hydrochloric acid waste liquid generated from steel pickling, by post-synthesis treatment of the iron oxides with yellow iron oxide, and subsequently heating the mixture at a temperature sufficient to release at least a part of the crystalline water contained in the yellow iron oxide to facilitate the removal of residual chloride present in iron oxides. The purified regenerated iron oxides are particular suitable for making high-grade ferrites.
Inventors:
Hamilton, Devitt, Morris, Giunia
Application Number:
JP53072496A
Publication Date:
March 26, 1999
Filing Date:
April 11, 1996
Export Citation:
Assignee:
SHELL INTERNATIONALE RESEARCH MAATSCHAPPIJ BESLOTEN VENNOOTSHAP
International Classes:
C01G49/02; (IPC1-7): C01G49/02
Attorney, Agent or Firm:
Kawahara Kazuho