Mixed polysaccharide precipitating agents and insulating articles shaped therefrom
AssigneeRhone-Poulenc Chimie
InventorsMarie-Madeleine Besnard, Claire David, Magali Knipper
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Abstract
Mixed polysaccharide compositions, well adopted for flocculating/precipitating solid particulates from liquid dispersions thereof and for the shaping of insulating articles therefrom, comprise (i) at least one succinoglycan polysaccharide, the basic recurring structural unit of which comprising glucose, galactose and succinyl moieties, and (ii) at least one natural polysaccharide or derivative thereof.
Claims32
In a process for precipitating solid particulates from an aqueous dispersion thereof by adding an effective amount of a precipitating agent thereto, the improvement which comprises utilizing as such precipitating agent a mixed polysaccharide composition of matter which is capable of precipitating a dispersion of solid particles in an aqueous medium, comprising:
- (i) at least one succinoglycan polysaccharide, the basic recurring structural unit of which comprises glucose, galactose and succinyl moieties, and
- (ii) at least one natural polysaccharide or derivative thereof, wherein in the aqueous medium the concentration of said mixed polysaccharide composition ranges from 0.001% to 0.5%.
An insulating shaped article, comprising an insulating amount of inorganic fibers and a mixed polysaccharide composition of matter which is capable of precipitating a dispersion of solid particles in an aqueous medium, comprising:
- (i) at least one succinoglycan polysaccharide, the basic recurring structural unit of which comprises glucose, galactose and succinyl moieties, and
- (ii) at least one natural polysaccharide or derivative thereof, wherein in the aqueous medium the concentration of said mixed polysaccharide composition ranges from 0.001% to 0.5%.
An insulating shaped article, comprising an insulating amount of wood fibers and a mixed polysaccharide composition of matter which is capable of precipitating a dispersion of solid particles in an aqueous medium, comprising:
- (i) at least one succinoglycan polysaccharide, the basic recurring structural unit of which comprises glucose, galactose and succinyl moieties, and
- (ii) at least one natural polysaccharide or derivative thereof, wherein in the aqueous medium the concentration of said mixed polysaccharide composition ranges from 0.001% to 0.5%.
In a process for the purification of a water supply having particulate impurities suspended therein by flocculating/precipitating such impurities therefrom, the improvement which comprises flocculating/precipitating such impurities with a mixed polysaccharide composition of matter which is capable of precipitating a dispersion of solid particles in an aqueous medium, comprising:
- (i) at least one succinoglycan polysaccharide, the basic recurring structural unit of which comprises glucose, galactose and succinyl moieties, and
- (ii) at least one natural polysaccharide or derivative thereof, wherein in the aqueous medium the concentration of said mixed polysaccharide composition ranges from 0.001% to 0.5%.
A method for precipitating ceramic fibers from dispersion comprising adding to a ceramic fiber containing dispersion an effective amount of a precipitating agent comprising a succinoglycan type polysaccharide produced by Agrobacterium tumefaciens I-736 and at least one natural polysaccharide or derivative thereof.
Dependencies are inferred from the claim text.