Patent · US Active

Production of red iron oxide pigment

US10221326B2 · kind B2 · utility

1Cited by

15References

20Claims

0Family size

Assignee

LANXESS Deutschland GmbH · DE

Inventors

Waldemar Czaplik · Burscheid, DE
Juergen Kischkewitz · Ratingen, DE
Wolfgang Oehlert · Wheeling, US
Huajun Li · Qingdao, CN

Key dates

Filing date	Nov 8, 2013
Grant date	Mar 5, 2019
Priority date	—
Expiry date	Oct 31, 2034

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC02F2103/34
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

The present invention relates to an improved process for producing red iron oxide pigments by the Penniman process with nitrate (also called nitrate process or direct red process) and to apparatus for implementing this process, and also to the use of the plant for producing red iron oxide pigments by the Penniman process with nitrate.

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