公开(公告)号：PT1230289E

公开(公告)日：2005-04-29

申请号：PT00964106

申请日：2000-09-05

Applicant: BASF AG

Inventor： LARBIG HARALD ,  JUNGE DIETER ,  HARRE KATHRIN ,  LORENZ REINHARD ,  HEINRICH GROSCH GEORG

IPC: C08G18/48 ,  C08G65/26 ,  C08G101/00

Abstract: The invention relates to polyether alcohols that are produced by a ring-opening polymerization of ethylene oxide and at least one alkylene oxide with at least 3 carbon atoms in the molecule to H-functional starting substances. The inventive method is further characterized in that ethylene oxide or a mixture of ethylene oxide and at least one alkylene oxide with at least 3 carbon atoms in the molecule with an ethylene oxide content of at least 98 %, based on the mixture, is added to the starting substance in an amount of maximally 40 % by weight, based on the weight of the polyether alcohol. At least one alkylene oxide with at least 3 carbon atoms in the molecule or a mixture of ethylene oxide and at least one alkylene oxide with at least 3 carbon atoms in the molecule and an ethylene oxide content of maximally 20 % by weight, based on the mixture, is added.

公开(公告)号：PT1259561E

公开(公告)日：2004-12-31

申请号：PT01925342

申请日：2001-02-20

Applicant: BASF AG

Inventor： MUNZINGER MANFRED ,  HARRE KATHRIN ,  BAUM EVA ,  STOSSER MICHAEL ,  HEINRICH GROSCH GEORG ,  DIRK FRANKE

IPC: B01J27/26 ,  C08G65/02 ,  C01C3/08 ,  C08G65/26

Abstract: A process for preparing polyether polyols includes a precipitation step, a recrystallization step, and a reaction step. In the precipitation step, a multimetal cyanide compound is precipitated by reaction of a metal salt with a cyanometalate compound. In the recrystallization step, the multimetal cyanide compound precipitated above is recrystallized by adding further metal salt and/or further cyanometalate compound. The recrystallization forms a multimetal cyanide catalyst compound. In the reaction step, an initiator and one or more alkylene oxide are reacted in the presence of the multimetal cyanide catalyst compound.