Abstract: A high-molecular flocculant rendered water-soluble by conversion of cyano groups contained in a high-molecular material, a method for producing the flocculant, and a method for efficiently processing water using the flocculant. A high-molecular material containing acrylonitrile as a monomer is processed safely to impart hydrophilicity to the material and the resulting product is used for water processing to contribute to environmental conservation. An amino compound is added to a cyano group containing high-molecular material to convert at least a portion of the cyano group (—C?N) into a molecular structure portion having an imidamino structure and, if necessary, to convert at, least the portion into one of an acid salt, a quaternary ammonium salt or a hydrolyzate structure portion to give a high-molecular flocculant. Alternatively, a high-molecular material having cyano groups is hydrolysed to convert the cyano group into carbamoyl groups, carboxylic groups or their salts to give a high-molecular flocculant.

Abstract: It is an object of the present invention to provide a blasting method and a shot material, which are very practical both in the cost and the treatment performance. (a) A shot material containing a styrene ion-exchange resin or a waste material caused therefrom, or/and a dried sludge-derived material, (b) a shot material containing a resin which is comprised of a resin containing a rubber component and a resin containing no rubber component, and (c) a shot material containing at least one component selected from the group consisting of an epoxy resin composition and inorganic filler, and a blasting method using the shot material.

Abstract: In a cleaning treatment of a substrate using an aqueous solution of ammonium fluoride or a mixture of an aqueous solution of ammonium fluoride and hydrofluoric acid as a cleaning liquid, the cleaning liquid is replenished by at least one liquid selected from the group consisting of water, ammonia, aqueous ammonia, and an aqueous solution of ammonium fluoride with the lapse of time during the use of the cleaning liquid, in which the required amount of the liquid to be added according to the time lapse is calculated based on the measurement date and controlled, or the component concentration of the cleaning liquid is detected and the liquid is added according to the obtained result, so that not only can the substrate be cleaned uniformly and stably, but also a resource saving and a reduction in waste can be achieved.

Abstract: Sulfonated styrene polymer and/or its salt, a waste water treatment material and sludge dehydrating agent each containing the sulfonated styrene polymer and/or its salt as an effective component thereof are disclosed. The waste water treatment material is used such that sulfonated styrene polymer and/or its salt, which has viscosity of 10 mPa·S to 20,000 mPa·S at 25° C. after 0.01 N to 5 N neutral salt has been added to 1 wt % water solution of the sulfonated styrene polymer and/or its salt, is added to each waste water so that waste water is purified. When a sludge dehydrating agent is required, sulfonated styrene polymer and/or its salt having a weight average molecular weight of 1,100,000 or greater is combined with a cation polymer flocculating agent or an inorganic flocculating agent.

Abstract: In the art of wet-cleaning a substrate by etching with a cleaning solution prepared by dissolving hydrofluoric acid as an active component in water, using the process of measuring the concentration of a predetermined component regularly and then replenishing the cleaning solution with a component for correcting the concentration at need on the basis of the result of measurement on the concentration in case of cleaning the substrate with an aqueous solution of ammonium fluoride as the cleaning solution while controlling air in a cleaning draft at an exhaust rate within a predetermined range.

Abstract: A method for recycling an optical disk includes crushing a recovered optical disk without further treatment into chips that are used as a raw material of a resin composition for forming a film. The resin composition can be formed by injection molding to form a resin molded article. A film is formed on the surface of the resin molded article by plating or coating.

Abstract: The invention provides a shell material for recording media comprising an alloy between an acrylonitrile-butadiene-styrene resin and recovery polyethylene terephthalate, the content of recovery polyethylene terephthalate in the total amount of the alloy being in the range of 5 to 80% by mass.

Abstract: A cleansing processing agent that is able to remove harmful substances contained in a variety of waste materials and a cleansing method are disclosed. Specifically, there is disclosed a cleansing processing agent containing a polymer having at least one of styrene or conjugate diene and acrylonitrile as constituent unit and into which are introduced ionic groups. This cleansing processing agent is contacted with a material for processing containing harmful substances contained in the material for processing for removing the harmful substances. The waste plastics can be used effectively, while a modified product obtained on chemical modification of the plastics is useful for suppressing environmental destruction caused by leakage of the harmful substances contained in the waste materials.

Abstract: The present invention provides a system for recycling spent sulfuric acid, which aims at providing an industrially advantageous system featuring that spent sulfuric acid is effectively utilized at a place other than a discharge source regardless of geographical conditions, and also provides a method for recycling waste sulfuric acid, and recycled sulfuric acid. In the system, when spent sulfuric acid discharged or collected at a discharge source A is transported by a carrier unit B, and used at a user office C, a concentration of the spent sulfuric acid is measured and/or adjusted at least at one of the discharge source A, the carrier unit B, and the user office C. The spent sulfuric acid waste liquid discharged or collected at the discharge source A is reutilized by being mixed with at least one of a hydrogen peroxide solution and water.

Abstract: In the art of wet-cleaning a substrate by etching with a cleaning solution prepared by dissolving hydrofluoric acid as an active component in water, using the process of measuring the concentration of a predetermined component regularly and then replenishing the cleaning solution with a component for correcting the concentration at need on the basis of the result of measurement on the concentration in case of cleaning the substrate with an aqueous solution of ammonium fluoride as the cleaning solution while controlling air in a cleaning draft at an exhaust rate within a predetermined range.

Abstract: A high-molecular flocculant rendered water-soluble by conversion of cyano groups contained in a high-molecular material, a method for producing the flocculant, and a method for efficiently processing water using the flocculant. A high-molecular material containing acrylonitrile as a monomer is processed safely to impart hydrophilicity to the material and the resulting product is used for water processing to contribute to environmental conservation. An amino compound is added to a cyano group containing high-molecular material to convert at least a portion of the cyano group (—C≡N) into a molecular structure portion having an imidamino structure and, if necessary, to convert at, least the portion into one of an acid salt, a quaternary ammonium salt or a hydrolyzate structure portion to give a high-molecular flocculant.

Abstract: A high-molecular flocculant rendered water-soluble by conversion of cyano groups contained in a high-molecular material, a method for producing the flocculant, and a method for efficiently processing water using the flocculant. A high-molecular material containing acrylonitrile as a monomer is processed safely to impart hydrophilicity to the material and the resulting product is used for water processing to contribute to environmental conservation. An amino compound is added to a cyano group containing high-molecular material to convert at least a portion of the cyano group (—C≡N) into a molecular structure portion having an imidamino structure and, if necessary, to convert at, least the portion into one of an acid salt, a quaternary ammonium salt or a hydrolyzate structure portion to give a high-molecular flocculant.

Abstract: A water-immersed switch which does not conduct electricity in the absence of a dielectric liquid, such as water, and which conducts electricity in the presence of the dielectric liquid. The water-immersed switch includes a modified copolymer containing acrylonitrile and at least one of styrene and/or a conjugated diene, as constituent units, and acidic groups introduced into said modified copolymer, and a plurality of electrically conductive electrodes.

Abstract: A technique of utilizing a sulfuric acid/peroxide liquid mixture, for example, its waste liquid material, is to be developed so that the waste liquid can be re-utilized and effectively applied to obviate the problem resulting from disposal. To this end, there is provided a method for utilizing a sulfuric acid/peroxide liquid mixture, for example, its waste liquid, in which peroxide in the sulfuric acid/peroxide liquid mixture is decomposed to render it possible to utilize the liquid mixture as sulfuric acid.

Abstract: To provide a plastic material suitable for preservation of the environment and a method for producing the same by adding organic or inorganic sludge to a resin derived from waste plastics to form a flame-retarded resin, an antistatic resin, or a biodegradable resin so that the electrical and physical properties of the resin are improved and sludge and waste plastics are effectively utilized.

Abstract: A method of manufacturing a polyelectrolyte having the step of sulfonating polystyrene resin in a state where the polystyrene resin has been dissolved or dispersed in solvent composed of alicyclic compounds.

Abstract: A technique of utilizing a sulfuric acid/peroxide liquid mixture, for example, its waste liquid material, is to be developed so that the waste liquid can be re-utilized and effectively applied to obviate the problem resulting from disposal. To this end, there is provided a method for utilizing a sulfuric acid/peroxide liquid mixture, for example, its waste liquid, in which peroxide in the sulfuric acid/peroxide liquid mixture is decomposed to render it possible to utilize the liquid mixture as sulfuric acid.

Abstract: Ascorbic acid and/or ascorbic acid salt is made to act together with oxygen on an organic compound. Alternatively, light radiation is applied during chemical action with oxygen so as to improve a composition efficiency of an organic compound and obtain a preferable decomposition amount. This reduces the load caused by an organic compound decomposition on the environment.

Abstract: According to the present invention, a water absorbent material and materials to be sucked included in a water permeable bag type member form a water absorber. Thus, the water absorber is small both in weight and volume upon its transportation, and accordingly, the water absorber can be rapidly conveyed in large quantities without depending on a human power. The water absorber absorbs water upon its use to adequately satisfy a function of a form traceability for weight, volume and outline.

Abstract: Sulfonated styrene polymer and/or its salt, a waste water treatment material and sludge dehydrating agent each containing the sulfonated styrene polymer and/or its salt as an effective component thereof are disclosed. The waste water treatment material is used such that sulfonated styrene polymer and/or its salt, which has viscosity of 10 mPa·S to 20,000 mPa·S at 25° C. after 0.01 N to 5 N neutral salt has been added to 1 wt % water solution of the sulfonated styrene polymer and/or its salt, is added to each waste water so that waste water is purified. When a sludge dehydrating agent is required, sulfonated styrene polymer and/or its salt having a weight average molecular weight of 1,100,000 or greater is combined with a cation polymer flocculating agent or an inorganic flocculating agent.