Abstract: The invention provides a food decay odor controller which includes a mercaptan remover.

Abstract: Peroxo-carbonates derived from molten alkali and/or Group II metal salts, particularly carbonate salts are used as catalysts in oxidation and epoxidation reactions. Transition metal compounds may be included to improve the selectivity of the reactions.

Abstract: The present invention discloses a compound comprising an expanded percarbonate salt having less than about 24 wt. % hydrogen peroxide. Also disclosed in this invention is a composition including the above-mentioned compound and a liquid loaded thereon. Further, there is disclosed a method of manufacturing the above-described compound.

Abstract: Disclosed is a process and composition for teeth bleaching and color maintenance made up of a solution added to beverages (coffee, tea, wine, sodas). The method and composition offers and option to start breaking down stains prior to penetration in o the tooth enamel. The purpose of this invention is to provide a way to eliminate or reduce the staining effect from beverages such as coffee, tea, wine, juices and sodas. The mixture will include an oxygen releasing agent which may include infusion of oxygen gas, and/or solutions of sodium perborate, carbamide peroxide, chlorine dioxide, or hydrogen peroxide. The mixture is dispensed into drinks that can stain teeth.

Abstract: The present invention discloses a compound comprising an expanded percarbonate salt having less than about 24 wt. % hydrogen peroxide. Also disclosed in this invention is a composition including the above-mentioned compound and a liquid loaded thereon. Further, there is disclosed a method of manufacturing the above-described compound.

Abstract: The present invention relates to a use of a two-way spray nozzle (1) with protective gas for manufacturing granular sodium percarbonate, said nozzle comprising a central tube (2) having an outlet for an aqueous hydrogen peroxide solution, an inner jacket tube (3) arranged coaxially around the central tube, and having an outlet for aqueous sodium carbonate solution, an outer jacket tube (4) arranged coaxially around the central tube and inner jacket tube, and having an outlet for a protective gas, a threaded ring slot (5) arranged around the central tube at a distance from the outlet of the central tube, wherein the threads of the ring slot are arranged at an angle ? with respect of the direction of the longitudinal axis (12) of the central tube, and in which said protective gas is used at a pressure of less than 0.7 bar. The present invention also relates to a method for manufacturing granular sodium percarbonate.

Abstract: Sodium percarbonate particles having a long term stability expressed as heat output at 40° C. of less than 5 ?W/g, measured after storage for 12 weeks at 40° C.

Abstract: The present invention relates to a use of a two-way spray nozzle (1) with protective gas for manufacturing granular sodium percarbonate, said nozzle comprising a central tube (2) having an outlet for an aqueous hydrogen peroxide solution, an inner jacket tube (3) arranged coaxially around the central tube, and having an outlet for aqueous sodium carbonate solution, an outer jacket tube (4) arranged coaxially around the central tube and inner jacket tube, and having an outlet for a protective gas, a threaded ring slot (5) arranged around the central tube at a distance from the outlet of the central tube, wherein the threads of the ring slot are arranged at an angle ? with respect of the direction of the longitudinal axis (12) of the central tube, and in which said protective gas is used at a pressure of less than 0.7 bar. The present invention also relates to a method for manufacturing granular sodium percarbonate.

Abstract: A process for eradicating moss and liverwort which includes applying sodium percarbonate; and irrigating the moss. In some cases the process includes applying lime to control the pH of the moss and thereby constrain development of additional moss and said sodium percarbonate is a solid material.

Abstract: The invention relates to a process for the preparation of coated granular sodium percarbonate having a low TAM value. The preparation is carried out by fluidized-bed spray granulation at a temperature TG in the range from 45 to 75° C., and the coating is effected by the spray application of an aqueous solution containing at least one coating component in a fluidized bed at a temperature TU in the range from 35 to 100° C. According to the invention, a) after the fluidized-bed spray granulation but before the coating, drying is carried out at TNT of greater than TG, or b) the fluidized-bed granulation is carried out in at least two steps at TG1, TG2 . . . TGn, TG2 or TGn being higher than TG1, and drying being unnecessary if ? of the granulate have been formed at TG1, or c) drying takes place not after the granulation but after the coating, at TUNT, TUNT being at least 20° C. higher than TG.

Abstract: The invention relates to a process for the production, by fluid-bed spray granulation, of granular sodium percarbonate having a low TAM value. According to the invention, in the fluid-bed spray granulation, an Mg compound in a quantity of 50 to 2,000 ppm, in particular 100 to 1,000 ppm, or/and a complexing agent from among the hydroxycarboxylic acids, aminocarboxylic acids, aminophosphonic acids and phosphonocarboxylic acids, hydroxyphosphonic acids and their alkali metal salts, ammonium salts or Mg salts, in a quantity of 50 to 2,000 ppm, in particular 200 to 1,000 ppm, are added as stabilisers to the soda solution and/or H2O2 solution. Preferably a combination of an Mg compound in a quantity of 100 to 1,000 ppm Mg2+ and waterglass in a quantity of 0.1 to 1 wt. %, in particular 0.1 to 0.5 wt. %, is used, and in this case granules having a TAM value of about or below 6 ?W/g and simultaneously a short dissolving time, are obtainable.

Abstract: The invention relates to uncoated and/or coated sodium percarbonate with improved internal stability and storage stability; and, a process that provides uncoated and/or coated sodium percarbonate with improved internal stability and storage stability.

Abstract: A method for the preparation of sodium percarbonate granules having enhanced stability, comprising modifying the surface of the sodium percarbonate granules by a surface reaction between sodium percarbonate and carbon dioxide or bicarbonate species to form a dense solid film of essentially sodium bicarbonate on the surface of the sodium percarbonate granules, the method comprising the steps of: a) dissolving carbon dioxide in water to form an aqueous solution containing dissolved carbon dioxide and bicarbonate, b) exposing the surface of the sodium percarbonate granules to a spray of the aqueous solution containing dissolved carbon dioxide and bicarbonate, to form the solid film of essentially sodium bicarbonate, and subsequently c) removing the residual fluid from the surface.

Abstract: The present invention relates to a process for preparing granular sodium percarbonate.

Abstract: The present invention relates to a manufacturing process of a coated granular sodium percarbonate, wherein the surface of said sodium percarbonate establishes a multiple coating layer by being internally coated with a specific composition containing alkali metal silicate while externally coated with a specific composition containing alkali metal sulfate on upper part of said internally coated layer thus providing said sodium percarbonate an excellent dissolving rate in water as well as a good storage stability, preventing it from caking during delivery or storage, and being ultimately utilized as an effective detergent bleach containing zeolite as its detergent builder.

Abstract: Sodium percarbonate is traditionally made in a crystallization process from aqueous hydrogen peroxide and sodium carbonate with recycle of mother liquor in the presence of a substantial concentration of a salting out agent, conventionally sodium chloride. The invention provides a process intended to be conducted without addition of chloride salting-out agent in which the dissolution step is controlled to restrict the sodium carbonate concentration to below 95%, preferably 60 to 90% of its saturated concentration at a temperature preferably controlled to at most 35C. and the mole ratio of hydrogen peroxide:sodium carbonate in the reaction vessel is controlled to between 0.7 to 1.2:1, and preferably about 1:1.

Abstract: A method for the preparation of sodium percarbonate granules having enhanced stability, comprising modifying the surface of the sodium percarbonate granules by a surface reaction between sodium percarbonate and carbon dioxide or bicarbonate species to form a dense solid film of essentially sodium bicarbonate on the surface of the sodium percarbonate granules, the method comprising the steps of:

Abstract: The invention relates to uncoated and/or coated sodium percarbonate with improved internal stability and storage stability; and, a process that provides uncoated and/or coated sodium percarbonate with improved internal stability and storage stability.

Abstract: The invention relates to a process for the production, by fluid-bed spray granulation, of granular sodium percarbonate having a low TAM value. According to the invention, in the fluid-bed spray granulation, an Mg compound in a quantity of 50 to 2,000 ppm, in particular 100 to 1,000 ppm, or/and a complexing agent from among the hydroxycarboxylic acids, aminocarboxylic acids, aminophosphonic acids and phosphonocarboxylic acids, hydroxyphosphonic acids and their alkali metal salts, ammonium salts or Mg salts, in a quantity of 50 to 2,000 ppm, in particular 200 to 1,000 ppm, are added as stabilisers to the soda solution and/or H2O2 solution. Preferably a combination of an Mg compound in a quantity of 100 to 1,000 ppm Mg2+ and waterglass in a quantity of 0.1 to 1 wt.%, in particular 0.1 to 0.5 wt.%, is used, and in this case granules having a TAM value of about or below 6 &mgr;W/g and simultaneously a short dissolving time, are obtainable.

Abstract: The invention relates to a novel sodium percarbonate in the form of agglomerates of small crystals. The average particle size of the agglomerates is greater than 600 &mgr;m. The apparent density of the agglomerates is between 0.75 g/cm3 and 1.1 g/cm3, and the active oxygen is greater than 14%. The invention also relates to a process for the continuous manufacture of sodium percarbonate in a fluidized bed.

Abstract: A process for the preparation of a stabilized sodium carbonate peroxyhydrate, in which an aqueous solution of sodium sulphate and a chelating agent is applied to granules of sodium carbonate peroxyhydrate, and the solution is allowed to dry, forming coated granules having a coating layer of sodium sulphate and the chelating agent on the granules. The chelating agent is selected from the group consisting of (poly)aminophosphonic acid derivatives, (poly)aminocarboxylic acid derivatives, and N-bis- and tris-[(1,2-dicarboxy-ethoxy)ethyl]amine derivatives. The stabilized sodium carbonate peroxyhydrate may be prepared by spraying the aqueous solution of sodium sulphate and the chelating agent onto granules of sodium carbonate peroxyhydrate in a fluidized bed.

Abstract: Sodium percarbonate exhibits a tendency to decompose in built compositions and particularly detergent compositions built with zeolites. The tendency can be ameliorated by selecting sodium percarbonate which intrinsically has a mean particle size of from 500 to 1000 microns and not more than 20% by weight of below 350 microns and has a moisture pick-up when measured in a test at 80% relative humidity and 32° C. after 24 hours of not greater than 30 g/1000 g sample. A suitable sodium percarbonate can be made most conveniently by crystallisation from a bulk saturated solution of sodium percarbonate in a crystalliser/classifier that does not employ a conventional chloride salting-out agent.

Abstract: Sodium percarbonate is traditionally made in a crystallization process from aqueous hydrogen peroxide and sodium carbonate with recycle of mother liquor in the presence of a substantial concentration of a salting out agent, conventionally sodium chloride.

Abstract: A method for the “dry” production of sodium percarbonate (dry process), in which monohydrate crystals of sodium carbonate are reacted with a quasi-stoichiometric quantity of concentrated aqueous hydrogen peroxide solution, relative to the quantity of active oxygen required in the sodium percarbonate to be produced. This method can be combined to great advantage with subsequent compaction of the sodium percarbonate obtained. Sodium percarbonate products containing varying concentrations of active oxygen of at least 10 weight percent, particularly high active oxygen concentrations of above 14.5 weight percent, can be produced. The resulting sodium percarbonate products are distinguished in that they have remarkably advantageous dissolution rates, stabilities and compatibility with detergent bases, and are superior to conventional sodium percarbonates obtained, for example, by a crystallization process.

Abstract: Sodium percarbonate is traditionally made in a crystallization process from aqueous hydrogen peroxide and sodium carbonate with recycle of mother liquor in the presence of a substantial concentration of a salting-out agent, conventionally sodium chloride. The invention provides a process intended to be conducted without addition of chloride salting-out agent in which the dissolution step (1) is controlled to restrict the sodium carbonate concentration to below 95%; preferably 60 to 90% of its saturated concentration at a temperature preferably controlled to at most 35° C. and the mole ratio of hydrogen peroxide: sodium carbonate in the reaction vessel is controlled to between 0.7 to 1.2:1, and preferably about 1:1.

Abstract: A flexible process for production of homogeneous sodium precarbonate particles or granules according to which a reaction slurry with an average to high solids content is prepared initially from an aqueous hydrogen peroxide solution of up to maximum 50% by weight and solid soda, this reaction slurry, which optionally may be finely ground by wet comminution, being subsequently subjected immediately to short-term drying, preferably spray drying, and, optionally, granulation. The process enables production, in an efficient manner, of essentially homogeneous sodium percarbonate particles or granules with variable active oxygen contents of 10 to 14.5% by weight and grain sizes and bulk densities which are variable within wide ranges.