Controlled addition of ligand in polyol synthesis
AssigneeRepsol, S.A.
InventorsMaría Dolores BLANCO GONZÁLEZ, Marta DUEÑAS DíEZ, Luisa María FRAGA TRILLO, Mónica GARCÍA RUIZ, José Antonio CARAZO ANGULO, Juan de Dios MIRANDA LÓPEZ-MARIN
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Abstract
The present invention relates to a process for the alkali metal base-catalyzed preparation of polyols comprising oxyalkylene units, comprising the addition of a ligand for chelating said alkali metal over a total period of time t≥5 min during the reaction time, to a polyol comprising oxyalkylene units, and to the use of said polyol.
Claims18
Process for the alkali metal base-catalyzed preparation of polyols comprising oxyalkylene units, comprising the addition of a ligand for chelating said alkali metal over a total period of time t≥5 min during the reaction time, wherein a portion of said ligand is added at a moment in time corresponding to 5 to 100% of the reaction time.
Dependencies are inferred from the claim text.