EP 4106917 A2 20221228 - PROCESS FOR PREPARING DOUBLE METAL CYANIDE CATALYSTS
Title (en)
PROCESS FOR PREPARING DOUBLE METAL CYANIDE CATALYSTS
Title (de)
VERFAHREN ZUR HERSTELLUNG VON DOPPELMETALLCYANID-KATALYSATOREN
Title (fr)
PROCÉDÉ POUR PRODUIRE DES CATALYSEURS À BASE DE CYANURE BIMÉTALLIQUE
Publication
Application
Priority
- EP 20158908 A 20200222
- EP 20202031 A 20201015
- EP 2021053814 W 20210217
Abstract (en)
[origin: WO2021165283A2] The present invention relates to a process for preparing a double metal cyanide (DMC) catalyst, comprising the reaction of an aqueous solution of a cyanide-free metal salt, an aqueous solution of an alkaline metal cyanide salt, an organic complex ligand and optionally a complex-forming component, wherein the metal cyanide salt is one or more compound(s) and is selected from the group consisting of potassium hexacyanocobaltat(III), potassium hexacyanoferrate(II), potassium hexacyanoferrate(III), calcium hexacyanocobaltate(III) and lithium hexacyanocobaltat(III), where the organic complex ligand is one or more compound(s) and is selected from the group consisting of dimethoxyethane, tert-butanol, 2-methyl-3-buten-2-ol, 2-methyl-3-butyn-2-ol, ethylene glycol mono-tert-butyl ether and 3-methyl-3-oxetanemethanol, and wherein the alkaline metal cyanide salt used has an alkalinity by the titration method disclosed in the Experimental of between 0.700% and 3.000% by weight of sodium hydroxide (NaOH) based on the total weight of the alkaline metal cyanide salt used. The invention further relates to double metal cyanide (DMC) catalysts obtainable by the process according to the invention and to the use of DMC catalysts for preparation of polyoxyalkylene polyols.
IPC 8 full level
B01J 27/26 (2006.01); B01J 31/02 (2006.01); B01J 31/06 (2006.01); B01J 31/22 (2006.01); B01J 37/03 (2006.01); B01J 37/04 (2006.01); C08G 65/12 (2006.01); C08G 65/26 (2006.01)
CPC (source: EP US)
B01J 27/26 (2013.01 - EP US); B01J 31/0202 (2013.01 - EP); B01J 31/068 (2013.01 - EP); B01J 31/2208 (2013.01 - EP); B01J 37/033 (2013.01 - EP); B01J 37/04 (2013.01 - EP US); C08G 65/2609 (2013.01 - EP); C08G 65/2663 (2013.01 - EP); B01J 2531/26 (2013.01 - EP); B01J 2531/845 (2013.01 - EP); C08G 65/2663 (2013.01 - US)
Citation (search report)
See references of WO 2021165283A2
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated extension state (EPC)
BA ME
Designated validation state (EPC)
KH MA MD TN
DOCDB simple family (publication)
WO 2021165283 A2 20210826; WO 2021165283 A3 20211014; CN 115135410 A 20220930; EP 4106917 A2 20221228; US 2023046210 A1 20230216
DOCDB simple family (application)
EP 2021053814 W 20210217; CN 202180015975 A 20210217; EP 21705520 A 20210217; US 202117797161 A 20210217