METHOD FOR THE PRODUCTION OF TETRAHYDROFURAN COPOLYMERS

    公开(公告)号:MY138639A

    公开(公告)日:2009-07-31

    申请号:MYPI20034640

    申请日:2003-12-04

    Applicant: BASF AG

    Abstract: THE PRESENT INVENTION PROVIDES A PROCESS FOR PREPARING POLYOXYALKYLENE GLYCOLS OF A CERTAIN MOLECULAR WEIGHT IN ONE STAGE BY COPOLYMERIZING TETRAHYDROFURAN AND ALPHA,OMEGA-DIOLS AS THE COMONOMER IN THE PRESENCE OF A HETEROPOLYACID AND OF A HYDROCARBON, BY DISTILLING OFF A MIXTURE OF WATER AND THIS HYDROCARBON FROM THE COPOLYMERIZATION, WHICH COMPRISES TERMINATING THE POLYMERIZATION WHEN THIS MOLECULAR WEIGHT IS ATTAINED BY ADDING WATER, COMONOMER, BUTANEDIOL OR BUTANEDIOL-WATER MIXTURES.

    METHOD FOR OBTAINING OLIGOMERS OF POLYTETRAHYDROFURANE OR TETRAHYDROFURANE COPOLYMERS

    公开(公告)号:MY139814A

    公开(公告)日:2009-10-30

    申请号:MYPI20042578

    申请日:2004-06-29

    Applicant: BASF AG

    Abstract: A PROCESS FOR OBTAINING OLIGOMERS OF POLYTETRAHYDROFURAN OR OF TETRAHYDROFURAN COPOLYMERS FROM A MEHTANOLIC CRUDE PRODUCT WHICH CONTAINS POLYTETRAHYDROFURAN OR TETRAHYDROFURAN OR TETRAHYDROFURAN COPOLYMERS AND IS ONTAINED IN THE TRANSESTERIFICATION OF THE MONO- AND/OR DIESTERS OF POLYTETRAHYDROFURAN OR TETRAHYDROFURAN COPOLYMERS WITH METHANOL, WHICH COMPRISES A)REMOVING THE MAJORITY OF THE METHANOL FROM THE CRUDE PRODUCT IN A FIRST DISTILLATION STAGE,B)SEPARATING THE RESULTING BOTTOM PRODUCT BY DISTILLATION INTO A TOP FRACTION COMPRISING THE OLIGOMERS OF POLYTETRAHYDROFURAN OR OF TETRAHYDROFURAN COPOLYMERS, AND POLYTETRAHYDROFURAN COPOLYMER,C)CONDENSING THE OLIGOMERS OF POLYTETRAHYDROFURAN OR OF TETRAHYDROFURAN COPOLYMERS OUT OF THE TOP FRACTION FROM STAGE B).

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