Patent · US Expired

Stable concentrated rare earth carboxylate liquids

US6111082A · kind A · utility

7Cited by

11References

60Claims

0Family size

Assignee

Rhodia Rare Earths, Inc. · US

Inventors

Kenan Yunlu · Princeton, US
Min He · Beijing, CN
Jean-Pierre Cuif · Princeton, US
Michel Alas · Niort, FR

Key dates

Filing date	Apr 17, 1998
Grant date	Aug 29, 2000
Priority date	—
Expiry date	Apr 17, 2018

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB01J2531/38
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

Stable Rare Earth carboxylate liquids having high concentrations of Rare Earths and suitable for use in forming active Ziegler Natta catalysts, are prepared with stabilizing agents such as water and/or acid. The liquids comprise from about 4.5% to about 20% Rare Earth element(s). A novel process for making is disclosed.

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