Abstract: The present invention relates to a process for producing a yellow iron oxide pigments comprising the steps of I) mixing preprecipitated FeCl2 and an &agr;-FeOOH nucleus produced by the “alkali” process, II) oxidizing the suspension in a first oxidation step at 20 to 45° C. III) oxidizing the suspension in a first oxidation step at 55 to 85° C.

Abstract: The invention relates to a process for preparing triethyl phosphate by reacting phosphorus oxychloride with a greater than stoichiometric quantity of ethanol under reduced pressure at temperatures of from 0 to 50° C. in a reaction vessel, wherein a) the volatile components resulting from the reaction are predominantly condensed by means of a reflux condenser and the remaining volatile components are passed into a scrubber filled with water, b) after the end of the reaction, the reaction mixture is separated distillatively in an outgassing column into a top product and a bottom product which predominantly comprises triethyl phosphate, c) the top product of the outgassing column is combined with the contents of the scrubber and d) the contents of the scrubber are separated distillatively in an azeotropic distillation to obtain water and ethanol as top product and the ethanol, preferably after dewatering, is preferably returned to the reaction.

Abstract: The invention relates to a novel process for preparing fluorosulfonic acid having low contents of low-boiling compounds in which hydrogen fluoride and sulfur trioxide are combined in stoichiometric amounts in a reaction vessel or by means of a reaction nozzle, the hot, gaseous fluorosulfonic acid that is formed is fed directly into a distillation column, and the fluorosulfonic acid is taken off at the bottom of the column or in the stripping section of the distillation column.

Abstract: This invention relates to paper sizing compositions comprised of at least one sizing agent selected from ASA, AKD and rosin where the at least one sizing agent is emulsified in water, at least one emulsion stabilizer, and from about 0.01% to about 15% by weight of at least one hydrophobic substance, based on the total weight of sizing agent present, provided that the hydrophobic substance is not highly alkoxylated. The sizing promotion efficiency of the paper sizing compositions, as determined by at least one method selected from the Cytec size testing method, the Hercules size testing method, and the Cobb size testing method, is greater than or equal to about 4. Exemplary hydrophobic substances include fatty acid esters, triglycerides, hydrocarbons, esters and/or amides derived from ASA, silicone oils, alcohols, and stearic anhydride. The invention also relates to methods for sizing paper products with these paper sizing compositions and paper or paperboard treated with these sizing compositions.

Abstract: The present invention relates to a process for preparing gel-like anion exchangers by aminating crosslinked gel-like styrene divinybenzene bead polymers that contain halogenoalkyl groups in the presence of an inorganic salt and in the absence of organic solvents.

Abstract: A description is given of a process for the industrial preparation of methylhydroxyalkylcelluloses (MHACs) by reaction of cellulose with alkali metal hydroxide and subsequent reaction with an alkyl halide and hydroxyalkylating agent, characterized in that the reaction is carried out batchwise in a reactor which has an L/D ratio of less than 2.5 and in which the unmixed regions are minimized and the batch reactor is preceded at the inlet by a continuously operated cellulose milling facility and is followed at the outlet by a continuously running plant for milling and drying the products, with the product being transported by action of gravity. An apparatus for carrying out this process and the methylhydroxyalkylcellulose obtainable by the process are also described.

Abstract: The present invention relates to a specific process in which wool is initially subjected to a plasma treatment and then to a wet chemical treatment with a finishing agent, which provides nonfelting wool in a technically simple and easily handleable manner.

Abstract: The present invention relates to a process for preparing novel, monodisperse ion exchangers having chelating functional groups, and their use for adsorbing metal compounds, in particular, heavy metal compounds and noble metal compounds, and also for extracting alkaline-earth metals from saline solutions from alkali metal chloride electrolysis.

Abstract: Described is a stretched multilayered film comprising: (a) a polyolefin layer; and (b) at least one peelable outer layer. Each peelable outer layer (b) independently is 0.5 to 5 &mgr;m thick, comprises a copolymer of vinyl acetate and ethylene, and has a vinyl acetate proportion of from 3 to 30 wt. %, based on the weight of the peelable outer layer (b). Also described is a method of using the multilayered film as a packaging film.

Abstract: The invention relates to a method of coloring seed, seed-dressing materials, or seed-dressing material formulations with solid pigment preparations containing (a) at least one organic or inorganic pigment and (b) at least one compound selected from the group consisting of polyether polyols, reaction products of alkylene oxides with alkylatable compounds, or oxalkylated phenols, wherein the solid pigment preparations have a water content of less than 10% by weight, based on the pigment preparation, and a mean weight average particle size of 20 to 2000 &mgr;m.

Abstract: An optical data storage medium containing a preferably transparent substrate which has optionally already been coated with one or more reflecting layers and onto the surface of which a photorecordable information layer, optionally one or more reflecting layers, and optionally a protective layer or an additional substrate or a top layer are applied, which data storage medium can be recorded on and read using blue or red light, preferably laser light, wherein the information layer contains a light-absorbing compound and optionally a binder, characterized in that at least one triazacyanine dye is used as the light-absorbing compound.

Abstract: The invention relates to the preparation of hydroxybenzoic benzyl esters by reacting benzyl chloride with hydroxybenzoic acids in the presence of one or more amides.

Abstract: The 3-nitroisoxazoles of the formula (I) in which R1 and R2 are each as defined in the description, some of which are known, are highly suitable for use as biocides for protecting industrial materials.

Abstract: The invention relates to a process for preparing water-soluble &pgr;-conjugated polymers by polymerizing, in aqueous solution using an oxidant, monomeric thiophene derivatives of formula (I) wherein X and Y are identical or different and are O, S, or N—R′, Z is —(CH2)m—CR2R3—(CH2)n—, R1 is aryl, C1-C18-alkyl, or hydrogen, R2 is hydrogen or —CH2)s—O—(CH2)p—SO3−M+, R3 is —(CH2)s—O—(CH2)p—SO3−M+, M+ is a cation, m and n are identical or different and are an integer from 0 to 3, s is an integer from 0 to 10, and p is an integer from 1 to 1.

Abstract: The invention relates to a method for producing a homogeneous mixture of hard material powders and binder metal powders without using grinding bodies, liquid grinding auxiliary agents and suspending media. According to the invention, the mixture components are mixed at close range while generating a high shearing collision velocity of the powder particles and are remotely mixed by rotating the mixing bed without resulting in a particle size reduction of the hard material powders.

Abstract: According to the invention, N-butyryl-4-amino-3-methyl-methyl benzoate is obtained in a particularly advantageous manner by, initially, reacting o-toluidine with butyric acid chloride, by brominating the reaction product and by reacting the bromide obtained therefrom with carbon monoxide and methanol in the presence of a palladium catalyst. The invention also relates to the important novel chemical compound N-(4-bromine-2-methylphenyl)-butanamide.

Abstract: The invention relates to optical brighteners that possess at least one free SO3H group and their use for whitening materials containing cellulose.

Abstract: A process is provided for preparing 4-hydroxy-3-nitrobiphenyl from 4-hydroxy-biphenyl by nitrating in the position adjacent to the phenolic hydroxyl group in high selectivity and yield, and the nitric acid used as the nitrating reagent is metered into the reaction system in a specific manner.

Abstract: The present invention relates to a process for preparing selective ion exchangers based on crosslinked vinylaromatic polymers and containing iminoacetic acid units of the general formulas (I) and (II) wherein X represents hydrogen or an alkali metal ion, by reacting a weak-base anion exchanger bearing primary amino groups with monochloro-acetic acid and/or an alkali metal salt of monochloroacetic acid at a temperature of from 70 to 110° C. and a pH of from 7 to 11.

Abstract: A process is provided for preparing specific polycarboxylic acids by oxidative cleavage of double-bond compounds with hydrogen peroxide or hydrogen peroxide donors. The polycarboxylic acids thus obtained are notable for excellent acid stability, and consequently ease of handling in aqueous solution and are useful for treating cellulosic fibers or textile or paper materials produced therefrom.