Abstract: The invention describes a point-type, spring-supported suspension means for noise protection sheets.

Abstract: A noise barrier system composed of a base and a transparent superstructure. A support holds at least two adjacent transparent noise barrier elements and includes a point-fastening of the transparent noise barrier element. A position of upper holding points of the transparent superstructure is arranged at a height of from 70 to 90% of a total height of the transparent noise barrier element and at a distance of from 3 to 50 times a thickness of the transparent noise barrier element from a vertical edge. An upper side of the transparent noise barrier element has a flexure, an angle of the flexure being from 30° to 90° from vertical, and a width of an angled region being from 5 cm to 50 cm, and an entire length of a lower side of the sheet is secured within a groove-shaped depression.

Abstract: Aqueous leachant compositions and processes for using the same comprising: (a) providing a metal-containing compound; and (b) subjecting the metal-containing compound to an acid digestion comprising contacting the metal-containing compound with an aqueous leachant; wherein the aqueous leachant comprises a mixture selected from the group consisting of: (i) sulfuric acid and one or more alkanesulfonic acids having alkane moieties selected from the group consisting of propyl, ethyl and methyl groups, at a weight ratio of alkanesulfonic acid to sulfuric acid of 1:1000 to 1:1; (ii) sulfuric acid and one or more salts of alkanesulfonic acids having alkane moieties selected from the group consisting of propyl, ethyl and methyl groups, at a weight ratio of salt of alkanesulfonic acid to sulfuric acid of 1:9 to 1:99.

Abstract: A process for the electrolytic treatment of metal-containing solutions, wherein at least one nonionic surfactant is used in the electrolyte solution, the surfactant reducing the surface tension of the electrolyte solution at a surfactant concentration of 0.2% by weight and a temperature of 24° C. in an aqueous solution with 190 g/l of sulfuric acid and 157 g/l of copper sulfate, which is diluted with water in a ratio of 1:10, by from 20 to 60%, is useful for working up ores or the purification of metals, like copper, chromium, nickel, zinc, gold and silver.

Abstract: The invention describes a point-type, spring-supported suspension means for noise protection sheets.

Abstract: A composition for cyanide leaching which comprises at least one nonionic surfactant and a process for extracting metals using the abovementioned composition are described.

Abstract: Mixtures comprising (a) pieces of open-cell aminoplastic foam with an average diameter in the range from 50 ?m to 5 mm (weight-average), (b) water, (c) at least one surfactant and (d) if appropriate an oil or fat phase.

Abstract: An aqueous sulfuric acid-containing composition which comprises at least one surfactant, and a process for extricating metal from metal-containing materials with the aid of this aqueous sulfuric acid-containing composition are described.

Abstract: The present invention relates to a coating material formulation comprising a mixture comprising as component a1 at least one surfactant and as component a2 at least one compound corresponding to the general formula (I) R1—O—(CH2—CHR2—O)n—(CH2—CH2—O)mR3??(I) in which R1 is optionally substituted phenyl, C4-C14 alkyl, R2 is C1-C8 alkyl, R3 is hydrogen, C1-C6 alkyl, benzoyl, acetyl, acryloyl, methacryloyl, n has an average value of 0 to 10, m has an average value of 1 to 10, where n+m?10 and m>n, and the alkylene oxide structural units, which are different if appropriate, can be distributed randomly or arranged in blocks, 1%-95% by weight of film-forming binders and resins, 0%-80% by weight of fillers, 0%-40% by weight of pigments, 0%-20% by weight of additives and 0%-90% by weight of organic solvents and/or water, the sum of the weight percentages being 100% by weight, and to the use of the mixture of the invention for lowering the surface tension in a coating material by addition to the coating mater

Abstract: A process is described for purifying polyalkylene glycols obtained by adding alkylene oxide to alkylene glycol, in which, after addition is complete, the resultant polyalkylene glycol is treated at a pH of >7 with a bleaching agent selected from the group consisting of peroxides, peracids, percarbonates, perborates, peroxodisulfates or oxygen, in each case with or without addition of a bleaching activator. The process is suitable in particular for preparing polyethylene glycol having molar weights from 196 to 203 g/mol which meets requirements of pharmacopeias.

Abstract: A solid, water-free and alkanol-free composite material comprises organic and/or inorganic water-insoluble particles or pigments in a mixture with at least one compound of the general formula (I) CnH2n+1O(A)x(B)yR??(I) where R is H, C1-6 alkyl or benzyl A is ethyleneoxy B is C3-10 alkyleneoxy or mixtures thereof, ?it being possible for groups A and B to be randomly distributed, alternating or in the form of two or more blocks in any order, n is an integer in the range from 4 to 8 x is a number in the range from 1 to 25 y is a number in the range from 0 to 10 and x+y is at least 1.

Abstract: A noise barrier system composed of a base and a transparent superstructure. A support holds at least two adjacent transparent noise barrier elements and includes a point-fastening of the transparent noise barrier element. A position of upper holding points of the transparent superstructure is arranged at a height of from 70 to 90% of a total height of the transparent noise barrier element and at a distance of from 3 to 50 times a thickness of the transparent noise barrier element from a vertical edge. An upper side of the transparent noise barrier element has a flexure, an angle of the flexure being from 30° to 90° from vertical, and a width of an angled region being from 5 cm to 50 cm, and an entire length of a lower side of the sheet is secured within a groove-shaped depression.

Abstract: The present invention relates to tanning aids, comprises a polymethyl methacrylate shaped body, where the transparency of the polymethyl methacrylate shaped body at 380 nm is at least 40%, and the polymethyl methacrylate shaped body comprises 0.005 to 0.

Abstract: The invention relates to tanning aids comprising a polymethylmethacrylate moulded body, which contains between 0.1 and 1.5 wt. % of a UV-stabiliser comprising a 2,2,6,6 tetraalkyl piperidyl group, said stabiliser having a transmission of at least 95% when dissolved in MMA with a concentration of 1 wt. % at 330 nm. Said polymethylmethacrylate moulded body contains between 0.005 and 0.1 wt % of a UV-absorber, which has a maximum transmission of 5% when dissolved in MMA with a concentration of 0.02 wt % at 320 nm and a transmission of at least 80% at 370 nm. The transparency of the polymethylmethacrylate moulded body is at least 40% at 380 nm.

Abstract: The invention relates to an acrylic glass plate for using as an opaque noise protection element in noise protection walls, said plate measuring a minimum of 2×2 m and having a minimum thickness of 8 mm, preferably more than 12 mm. Threads, strips, grids or networks consisting of a material which is incompatible with the acrylic glass are integrated into said acrylic glass for binding splinters in the event of a fracture of the plate, and the plate comprises between 40 and 80 wt. % of filling materials, in relation to its total weight (calculated without integrated threads, strips, grids or networks). Said filling materials are preferably extender materials consisting of talc and dolomite, optionally and preferably mixed with aluminium hydroxide. The invention also relates to a method for producing such plates.

Abstract: The present invention relates to a process for preparing polyoxyalkylene glycol of high purity and having a low color number from the corresponding alkylene glycol and a starter in the presence of a basic catalyst, wherein a reducing agent is present in the polymerization.

Abstract: The invention relates to alkylglycol alkoxylates and alkyldiglycol alkoxylates that are obtainable by alkoxylating C4-8 alkylglycols or diglycols with C2-5 alkoxides up to an average alkoxylation degree of 1 to 8, based on the C4-8alkylglycols or diglycols. The invention further relates to mixtures from C2-5 alkoxylates of C4-8 alkylgycols or -diglycols that have an average alkoxylation degree of 1 to 8 and tensides that have an interfacial tension of less than 45 mN/m at 20° C. when dissolved in an amount of 5 g/l of water, and/or to diyhdroxyalkins or derivatives thereof.

Abstract: Soundproofing, restraining systems including at least one transparent acrylic glass panel that contains at least one embedded metal cable. A layer of plastic is provided, at least partially, between the surface of the metal cable and the transparent acrylic glass matrix. The restraining systems can be used in particular as noise barriers.

Abstract: A process is described for purifying polyalkylene glycols obtained by adding alkylene oxide to alkylene glycol, in which, after addition is complete, the resultant polyalkylene glycol is treated at a pH of >7 with a bleaching agent selected from the group consisting of peroxides, peracids, percarbonates, perborates, peroxodisulfates or oxygen, in each case with or without addition of a bleaching activator. The process is suitable in particular for preparing polyethylene glycol having molar weights from 196 to 203 g/mol which meets requirements of pharmacopeias.

Abstract: Sanitary applicances with a casing, such as bath tubs, shower trays or washbasins, are glass fiber- and asbestos-free, and are further characterized in that the reinforcing material is 1.5 to 10 mm thick and consists of one or two layers. The one layer or the first layer of a multilayered reinforcement is obtained by hardening a first polylmerizable, cole-hardenable, reactive (meth)acrylate system sprayed on the back of the acrylic glass moulding. The (meth)acrylate system contains as filler hollow microparticles, preferably made of plastics, filled with an inert gas. The composition of the (meth)acrylate system is defined by the invention. The disclosed sanitary appliances meet all requirements of the DIN EN 19 norm and can be recycled.