Patent · US Active

Method for the production of noble metal oxalate complexes

US9156767B2 · kind B2 · utility

1Cited by

0References

13Claims

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Assignee

HERAEUS DEUTSCHLAND GMBH & CO. KG · DE

Inventors

Richard Walter · Santa Clara, US
Florian Eweiner · Hanau, DE
Walter Lässig · Gelnhausen, DE
Jörg Fuchs Alameda · Trochtelfingen, DE

Key dates

Filing date	Sep 24, 2013
Grant date	Oct 13, 2015
Priority date	—
Expiry date	Sep 24, 2033

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC07C51/412
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

Abstract

The production of noble metal oxalate complexes from noble metal precursors and oxalic acid and/or oxalic acid salts is an exothermic reaction, in which heat and CO2 are produced, is described. The temperature can increase above the decomposition point of the noble metal oxalate complexes in the course of the reaction, which simultaneously releases more CO2. For safety reasons, when the reaction is carried out on a large scale, it is therefore necessary to take into consideration that the product must not be decomposed by heat that is produced during the reaction. Therefore, according to the invention, a method for the production of noble metal oxalate complexes is provided, in which the product noble metal oxalate complexes are added to the reaction mixture as an auto-catalyst.

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