Patent · US Active

Preparation of red iron oxide pigment

US11104807B2 · kind B2 · utility

0Cited by

16References

6Claims

0Family size

Assignee

LANXESS Deutschland GmbH · DE

Inventors

Waldemar Czaplik · Burscheid, DE
Udo Holtmann

Key dates

Filing date	Mar 8, 2017
Grant date	Aug 31, 2021
Priority date	—
Expiry date	Feb 15, 2038

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC01P2006/60
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

The present invention relates to an improved process for producing iron oxide red pigments by the Penniman process using nitrate (also referred to as nitrate process or direct red process) and apparatuses for carrying out the process.

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