Patent · US Active

Method for producing double metal cyanide catalysts

US11976165B2 · kind B2 · utility

0Cited by

14References

20Claims

0Family size

Assignee

Covestro Deutschland AG · DE

Inventors

Joerg Hofmann · Krefeld, DE
Klaus Lorenz · Worms, DE
Elisabeth Vogelsang · Cologne, DE
Maria Gleixner · Kempen, DE

Key dates

Filing date	Jan 11, 2021
Grant date	May 7, 2024
Priority date	—
Expiry date	Jun 12, 2041

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB01J2531/845
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

The present invention relates to a method for producing a double metal cyanide (DMC) catalyst, comprising the reaction of an aqueous solution of a cyanide-free metal salt, an aqueous solution of a metal cyanide salt, an organic complex ligand, optionally a complex-forming component to form a dispersion, the dispersion being produced using a mixing nozzle and a peroxide. The invention further relates to double metal cyanide (DMC) catalysts obtainable by means of the method according to the invention and to the use of DMC catalysts to produce polyoxyalkylene polyols.

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