FIELD: chemistry.
SUBSTANCE: one of the versions of the method consists in reaction of a feeding composition containing at least one of the following: lactic acid, glycerine, sugar with five carbon atoms, sugar alcohol with five carbon atoms, sugar with six carbon atoms and sugar alcohol with six carbon atoms, with hydrogen in the presence of a suitable catalyst which catalyses the reaction, and under conditions allowing to carry out the reaction. Improvement includes: setting the target pH value outside of which pentanediols begin to form, starting reaction of feed composition with hydrogen in presence of catalyst at target pH value, introduction of base during reaction to adjust pH in reaction system at level close to initial target value.
EFFECT: present invention relates to versions of improved method of producing propylene glycol bioproducts.
9 cl, 2 tbl, 5 ex
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