Abstract: A next textile treatment where the present method can be used to remove contaminants from the textile concerns rewashing. As already observed above, after dyeing textile with reactive dyestuffs, a considerable amount of dyestuff, particularly hydrolyzed dyestuff, is left behind on the textile. Because the hydrolyzed dyestuff is not fast to washing, it should be removed to provide a textile with sufficient washing fastness. In a rewashing treatment of textile dyed with reactive dyestuff, the textile is first rinsed with water to remove alkali and salt. Thereupon, it is rewashed, with the fructan polycarboxylic acid being metered in the form of a 25-40% solution in an amount of 1-3 g/l of water. Rewashing preferably takes place at a temperature of 95-100° C. for a period of 10-30 minutes. After rewashing, the textile is again rinsed with water to remove residues of the hydrolyzed reactive dyestuff.

Abstract: The invention relates to a method for sequestering metal ions at a low pH. Surprisingly, it has been found that certain fructan polycarboxylic acids, as opposed to the generally used sequestering agents, are capable of complexing metal ions in an efficient manner at a pH lower than 6. Additionally, the invention relates to a cleaning composition containing a fructan polycarboxylic acid as sequestering agent.

Abstract: Carboxyl-containing fructans such as carboxymethylinulin can be successfully used to prevent deposition of scale composed of, for example, calcium, barium and strontium salts of sulphuric acid and carbonic acid in oil extraction. In the oil extraction method, 0.5-200 ppm of a carboxyl-containing fructan that contains 0.3-3 carboxyl groups per mono-saccharide unit is incorporated in the process water, in the process equipment or in the oil-containing formation.

Abstract: Dispersions of pigment, such as calcium carbonate, titanium dioxide and types of clay, can be effectively stabilized by the use of carboxyl-containing fructan in an amount of 0.05-10% by weight, based on the dispersion, which fructan contains 0.5-3 carboxyl groups per mono-saccharide unit. The carboxyalkyl groups are in particular carboxymethyl groups, but the carboxyl groups can also be carboxyl groups obtained entirely or partially by oxidation. The carboxymethylfructan gives results which are comparable to or better than those obtained with the polyacrylates which are less desirable from the standpoint of health and environment.

Abstract: The deposition of calcium salts, including calcium carbonate and calcium oxalate and the formation of foam, during the evaporation of sugar streams can be prevented or restricted by ding 0.1-200 ppm of a carboxyalkylfructan that contains 0.5-3 carboxyl groups per monosaccharide unit, 0.4-2.5 of which carboxyl groups are in the form of carboxyalkyl groups, to the sugar streams. The carboxyalkyl groups are, in particular, carboxymethyl groups. The other carboxyl groups can be carboxyl groups obtained by oxidation.

Abstract: It is possible to prepare cationic derivatives of fructans, such as inulin, in which a nitrogen atom having substituents R1, R2 and R3 is bonded to one or more anhydrofructose units via a straight-chain or branched C2-C6 alkylene group, which is optionally preceded by a carbonyl group or interrupted by one or two oxygen atoms or imino or alkylimino groups and optionally substituted by one or two hydroxyl groups or amine groups or a carboxyl or carbamoyl group, the substituents R1, R2 and R3 having the following meaning: R1 and R2 each represent hydrogen, methyl carboxymethyl, phosphonomethyl, ethyl, hydroxyethyl, propyl, isopropyl, allyl, hydroxypropyl or dihydroxypropyl or, together with the nitrogen atom, form a cyclic group, R3 represents hydrogen, C1-C18 alkyl, C3-C18 alkenyl, alkynyl or cycloalkyl, C4-C18 cycloalkyl-alkyl or C7-C18 aralkyl or is bondedvia an alkylene group to an oxygen atom of a subsequent anhydrofructose unit.

Abstract: Heavy metals including lead, copper, zinc, and cadmium, are effectively extracted from sludge mixtures by treatment of the mixture with carboxyl derivatives of fructans, having a degree of substitution of 0.2-3.0.