Process for preparation of polyether polyols with low unsaturation.

摘要

The invention relates to polyether polyol HAVING TERMINAL unsaturation limited and are prepared by a process comprising a first phase of contacting a polyether INCLUDING unsaturation ALLYL terminal with an isomerisation catalyst, so that said terminal unsaturation is reduced by at least 90% conversion to a terminal unsaturation propenyl in one phase and, in a final phase, the polyether product RESULTING FROM THE FIRST pHASE GETS IN CONTACT WITH an acid catalyst, to remove A CONSIDERABLE AMOUNT OF TERMINAL unsaturation propenyl and obtain the corresponding polyether with a hydroxyl group ADDITIONAL.