Treatment of polysaccarides with dialdehydes
AssigneeDow Global Technologies LLC
InventorsAlexandra Hild, Matthias Sprehe, Axel Altmann, Roland Adden
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Abstract
A process for treating a polysaccharide with a dialdehyde in the presence of from 10 to 40 weight percent of water, based on the total weight of polysaccharide and water, is beneficially conducted in a mixing device characterized by a FROUDE number FRw of larger than 11, wherein ωw is the angular frequency in sec-1 and is defined as 2*π*RPM/60, RPM is the rotational speed of the mixing device in revolutions per minute, Rw is the radius of the mixing device in m, and g is the acceleration due to gravity in m/s2. Fr w = ω w 2 R w g
Claims14
A process for treating a cellulose ether with 0.1 to 4% by weight, based on dry cellulose ether, of a dialdehyde in the presence of from 10 to 40 weight percent of water, based on the total weight of cellulose ether and water, in a mixing device characterized by a FROUDE number FRw of larger than 11, wherein
- Fr
- w
- =
- ω
- w
- 2
-
- R
- w
- g
- ,
- wherein ωw is the angular frequency in sec−1 and is defined as 2*π*RPM/60,
- RPM is the rotational speed of the mixing device in revolutions per minute,
- Rw is the radius of the mixing device in m, and
- g is the acceleration due to gravity in m/s2.
Dependencies are inferred from the claim text.