69 results about "Sulphite salt" patented technology

This invention describes a process for producing a nanoscale zero-valent metal, including reduction of a metal ion solution with a dithionite compound, wherein the reduction is carried out under alkaline conditions under substantially an inert atmosphere. A nanoscale zero-valent metal obtainable by this process, and having a new crystalline form, is also described. The nanoscale zero-valent metal produced by the process of the invention is preferably iron, and is advantageously used for the remediation of contaminated water.

The present invention is directed to a coated bismuth oxy halide-based pigment having a coating comprising an antioxidant, said antioxidant is being a phenol based, a phosphite or phosphonate based, or a thioether based stabilizer, and the coating comprising an inner coating and an outer coating, wherein the outer coating comprises the antioxidant, and wherein the inner coating comprises a first layer consisting of one or more salts, or one or more oxides, heteropolyacids, organic acids, sulphites, sulfides, sulfates, phosphates, pyrophosphates, polyphosphates, hydrates, carbonates, or a combination thereof, selected from the group of alkali-earth metals, metals, non-metals, transition metals or lanthanides. Further, the present invention is directed to a composition comprising a paint, alacquer, an ink, a cosmetic, a resin, a plastisol or a polymer formulation, and such pigment. In addition, the present invention is directed to a method for manufacturing a coated bismuth oxy halide-based pigment, said method comprising the steps of: - providing a dispersion of a bismuth oxy halide-based pigment, adding a dispersion of an antioxidant, mixing and drying.

This water-based coolant is characterized by being obtained by mixing at least one of each of the following inorganic acid salts: phosphate, phosphite, sulphate, sulphite, borate, molybdate, tungstate, carbonate, hydrogen carbonate, and sesquicarbonate. This water-based coolant exhibits excellent cooling performance, and excellent anti-corrosion properties towards metal materials to be cooled therewith, and thus is suitable for use as a cutting fluid and a quenching fluid for metal materials.

The present invention provides a system for capturing CO2 and / or SO2, comprising: (a) a CO2 and / or SO2 absorber comprising an amine and / or amino acid salt capable of absorbing the CO2 and / or SO2 to produce a CO2- and / or SO2-containing solution; (b) an amine regenerator to regenerate the amine and / or amino acid salt; and, when the system captures CO2, (c) an alkali metal carbonate regenerator comprising an ammonium catalyst capable catalyzing the aqueous alkali metal bicarbonate into the alkali metal carbonate and CO2 gas. The present invention also provides for a system for capturing SO2, comprising: (a) a SO2 absorber comprising aqueous alkali metal carbonate, wherein the alkali metal carbonate is capable of absorbing the SO2 to produce an alkali metal sulfite / sulfate precipitate and CO2.

The invention relates to a method for preparing nano-filament cellulose with a high length-diameter ratio by using camellia oleifera shells, belonging to the technical field of nano structure materials. The method comprises the steps of pretreating the camellia oleifera shells serving as an initial raw material by using a sulfite alkaline method, carrying out alkali purification, bleaching by using hydrogen peroxide to obtain camellia oleifera shell cellulose; after that, using a TEMPO / NaClO / NaBr medium oxidation system to treat a great deal of carboxyl groups introduced to fibers of the camellia oleifera shell cellulose, and then further carrying out high-pressure homogenization treatment so as to finally obtain the nano-filament cellulose with the high length-diameter ratio. The method is simple in production technology and easy to implement, and not only well improves the comprehensive utilization value of the camellia oleifera shells and meets the requirements of the sustainable development strategy of China, but also can be used for preparing the nano-filament cellulose which has the high length-diameter ratio and the characteristics of being good in mechanical properties, biodegradable, easy to compound, and the like, thus being widely applied to the industrial fields such as optics, electrics and semiconductor devices.

The invention relates to the field of gold plating, and discloses a cyanide-free sulfite gold plating solution and an application thereof. The cyanide-free sulfite gold plating solution contains gold sulfite, alkali metal sulfite, and 3-nitrobenzenesulfonic acid Salts, organic polyamines, organic phosphonates, polyol compounds, high molecular polymers containing imines, and thiourea compounds. The cyanide-free sulfite gold plating solution provided by the present invention contains a current efficiency stabilizer with excellent properties, which participates in the reduction process of the cathode during the gold plating process, and prevents the occurrence of chemical side reactions, thereby improving the current efficiency, which is obviously beneficial Improve the throwing ability of the plating solution. And it improves a series of problems such as the inaccurate prediction of the amount of gold plating caused by the low current and unstable current efficiency, the relatively poor dispersion ability of the plating solution and the low current density.