3 results about "Cuprous thiocyanate" patented technology

The utility model belongs to the field of industrial waste liquid treatment and recovery, disclose is a kind of coking desulfurization waste liquid salt extraction system, including pretreatment system and first salt extraction system;The pretreatment system includes first reaction kettle and first filter device, the first reaction kettle with the first filter device is connected, for the impurity removal and filtration of coking desulfurization waste liquid;The first salt extraction system includes crystallization reactor and second filter device, the crystallization reactor includes feed inlet, liquid discharge port and solid discharge port, the feed inlet is used to put in the coking desulfurization waste liquid after impurity removal and copper sulfate solution, the solid discharge port with the second filter device is connected, and the second filter device is used to filter out cuprous thiocyanate. Cuprous thiocyanate reaction precipitation can be realized to filtration treatment, and the processing efficiency is improved.

This invention relates to a method for preparing 2-nitro-5-cyanothiobenzoic acid, comprising: (1) dissolving 5-amino-2-nitrobenzoic acid and an acid in a first reaction solvent, water, adding a nitrosating agent dropwise to the reaction system, reacting at a temperature of -20 to 20°C for 1 to 12 h, to obtain intermediate 3-carboxy-4-nitrobenzene diazonate M; the first reaction solvent is one or a mixture of water, acetonitrile, and ethanol; (2) reacting the intermediate 3-carboxy-4-nitrobenzene diazonate M obtained in step (1) with a thiocyanating agent and a catalyst in a second reaction solvent to undergo a nucleophilic substitution reaction, reacting at a temperature of -20 to 30°C for 1 to 24 h, to obtain 2-nitro-5-cyanothiobenzoic acid; the thiocyanating agent is selected from one or a mixture of cuprous thiocyanate, sodium thiocyanate, or potassium thiocyanate; the second reaction solvent is one or a mixture of water, acetonitrile, and ethanol. The raw materials of this invention are readily available, the cost is controllable, the reaction is mild, it is green and environmentally friendly, and it has high selectivity and high yield.

This application provides a smart thermochromic phase change microcapsule composite material for architectural glass, its preparation method, and its application, relating to the field of building energy-saving materials technology. The composite material comprises a phase change core material composed of tetradecyl alcohol, butyl stearate, and docosane; a composite wall material composed of urea-formaldehyde prepolymer, melamine prepolymer, and glyoxal-modified starch; and is prepared in conjunction with cuprous thiocyanate nanowires, a thermal conductivity modifier, and a transparent film-forming matrix. Through multi-component synergistic design, the thermochromic, phase change heat storage, and transparent film-forming properties are unified, significantly improving the composite material's thermal response sensitivity, heat storage stability, and photothermal regulation capability. Simultaneously, it improves the light transmittance, thermal insulation performance, and cycle life of architectural glass, and can be widely applied in the field of energy-saving smart architectural glass.