FIELD: continuous production of polyoxyalkylene polyether product.
SUBSTANCE: proposed method includes introduction of first portion of mixture of double metallocyanide catalyst with initial starter into continuous-action reactor for initiating polyoxyalkynylation of initial starter after introduction of alkylene oxide. Proposed method includes: (a) continuous introduction of one or more alkylene oxides into said reactor; (a')continuous introduction of mixture of double metallocyanide catalyst with starter into inlet hole of said reactor for maintenance of catalytic activity at required level; (a")continuous introduction of one or several additional starters in addition to starter introduced into said inlet hole of reactor together with catalyst; these additional starters may be identical to said starter or may differ from it and may contain additional double metallocyanide catalyst; (b) polyoxyalkynylation of combined starters of continuous action of stages (a), (a') and (a") for obtaining polyoxyalkylene polyether product having required average molecular mass; and (c) continuous removal of said polyoxyalkylene polyether product from reactor. Proposed method makes it possible to obtain polyoxyalkylene polyether product of low degree of nonsaturation and narrow polydispersity practically containing no fractions of high molecular mass.
EFFECT: enhanced efficiency.
29 cl, 6 dwg, 7 ex
