Abstract: Oxidized cyclodextrins containing an average of at least 0.5 carboxyl group and/or at least 0.5 functional group selected from aldehyde groups and aldehyde-derived groups per molecule can be used as complexing agents, in particular in odor control for hygiene products. A fragrance component can be incorporated in the oxidized cyclodextrin and released when in use, and, in addition or alternatively, the oxidized cyclodextrin can absorb undesired odor components during use.

Abstract: The invention pertains to a process for the regeneration and recovery of periodate from a spent iodate solution, by reacting the iodate with at least an equimolar amount of hypohalite, and carrying out the recovery in the presence of a water-miscible organic solvent or potassium ions or divalent metal (especially calcium) ions. The regenerated periodate is especially suitable for oxidising carbohydrates to dialdehyde carbohydrates.

Abstract: Primary alcohols, especially in carbohydrates, can be selectively oxidized to aldehydes and carboxylic acids in a low-halogen process by using a peracid in the presence of a catalytic amount of a di-tertiary-alkyl nitroxyl (TEMPO) and a catalytic amount of halide. The halide is preferably bromide and the process can be carried out at nearly neutral to moderately alkaline pH (5-11). The peracid can be produced or regenerated by means of hydrogen peroxide or oxygen. The process is advantageous for producing uronic acids and for introducing aldehyde groups which are suitable for crosslinking and derivatization.

Abstract: A cationic cellulosic fibre containing between 1 and 30 cationic groups and between 0.1 and 20 aldehyde groups per 100 anhydroglucose units is a suitable basis for producing paper and tissue products without the necessity of using non-biodegradable cationic polymers as wet strength additives. The cationic cellulosic fibre can be obtained by oxidation of the fibre to introduce aldehyde groups, followed by reaction of part of the aldehyde groups with a nitrogen-containing reagent such as betaine hydrazide hydrochloride. The fibre is advantageously combined with an anionic polymer such as monoaldehyde carboxyl-starch or with anionic cyclodextrin.

Abstract: Cyclodextrins and other ecapsulating oligosaccharides can be bound to fibrous and/or polysaccharidic carriers by ionic bonds. The ionic bonds can be produced by introducing cationic or anionic groups into the cyclodextrins, and where appropriate, by introducing oppositely charged groups in the carrier material. The products can be used for odor control in the fibrous material.

Abstract: The present invention relates to a cellulose-containing fibrous material, wherein hydroxy groups were oxidized at the C(6) of glucose units of the cellulose into aldehyde and/or carboxy groups, a paper or nonwoven (product) made therefrom, in particular tissue (products) a process for their manufacture. The paper or nonwoven (products) of the invention display excellent strength properties.

Abstract: Primary hydroxyl groups in a substrate having both primary and secondary hydroxyl groups can be selectively oxidized to carbaldehyde and/or carboxyl groups by contacting the substrate with a cyclic nitroxyl compound in the presence of a peroxosulfate as a co-oxidant and by carrying out the reaction at a temperature below 30° C. and at a pH below 9. The process is halogen-free and metal-free and is especially suitable for oxidizing polysaccharides.

Abstract: A superabsorbent polysaccharide derivative is obtained by oxidation of the polysaccharide to the extent that the derivative contains 0.2-0.3 carboxyl group per monosaccharide unit and cross-linking the oxidized polysaccharide with 0.0001-0.2 equivalent of cross-linking agent per monosaccharide unit. The polysaccharide may also be cross-linked prior to oxidation.

Abstract: A simplified process for oxidizing starch and other polysaccharides in an aqueous solution or suspension using hypochlorite in the presence of a catalytic amount of a nitroxyl compound is described. The oxidation is process is bromide-free and is carried out at a pH between 7 and 9.3 and at a temperature between 15 and 25° C.

Abstract: The invention relates to a method for cleaning apparatus used during the production of foodstuffs, in particular the filtration thereof, wherein this apparatus is contacted after use with a cleaning system based on the combination of a cyclic nitroxyl compound and a hypohalite.

Abstract: A process is described for removing noxious compounds such as hydrocarbons which may or may not contain halogen and/or may or may not be aromatic, from solids (soil), water or gas, according to which process the solid, the water or the gas is treated with a complex of a transition metal and an alkaline polyamine in the presence of a peroxide. The complex is, for example, a complex of iron chloride and 1,4,7-trimethyl-1,4,7-triazonane. The peroxide is preferably electrochemically produced hydrogen peroxide.