Patent · US Expired

Method of making a stable non-pyrophoric lithium diorganoamide solution

US5574197A · kind A · utility

2Cited by

3References

7Claims

0Family size

Assignee

Metallgesellschaft AG · DE

Inventors

Wilfried Weiss · Oberursel, DE
Ulrich Wietelmann · Friedrichsdorf, DE
Uwe Lischka · Frankfurt am Main, DE
Ute Emmel · Frankfurt am Main, DE

Key dates

Filing date	Sep 23, 1994
Grant date	Nov 12, 1996
Priority date	—
Expiry date	Sep 23, 2014

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC07F1/005
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

Abstract

The method of making the stable non-pyrophoric solution containing a lithium diorganoamide of the formula, LiNR'R" wherein R' and R" each have from 2 to 6 carbon atoms, in an inert liquid hydrocarbon solvent includes mixing a secondary amine including the R' and R" groups and an alcohol having 3 to 6 carbon atoms with a lithium granulate or powder in the hydrocarbon solvent and reacting the secondary amine, the alcohol and the lithium with addition of an electron acceptor compound, advantageously styrene or isobutene, to form the stable non-pyrophoric solution containing the lithium diorganoamide and a lithium alkoxide having 3 to 6 carbon atoms.

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