400 results about "Sodium thiocyanate" patented technology

The invention discloses a method for preparing sodium thiocyanate by using desulphurization waste liquid of coke oven gas, and belongs to the technical field of utilization of desulphurization waste liquid of the coke oven gas. The method comprises the following steps: using the desulphurization waste liquid of the coke oven gas as a raw material, firstly, filtering the waste liquid in vacuum, using tributyl phosphate to extract thiocyanate radicals in the waste liquid, then using sodium hydroxide solution to back-extract the extract, and finally concentrating and crystallizing the extract, and washing and drying the crystals to obtain sodium thiocyanate crystals. The method uses the desulphurization waste liquid of the coke oven gas to prepare a sodium thiocyanate product with the purity as high as 93 to 95 percent so as to change waste into valuable and makes full use of waste resources; and the method is simple, saves energy, has no three-waste discharge, is favorable for environmental protection, has low production cost and good economic benefit, and develops a new path for the utilization of the desulphurization waste liquid resources of the coke oven gas. The sodium thiocyanate product prepared by the method can be widely applied in the industries of medicaments, textile, printing and dyeing, pesticide, chemistry and the like.

A process for preparing the nanoparticles modified antistatic polyacrylonitrile fibres features that the nano-class metallic oxide as antistatic substance is dispersed in the aqueous solution of polyacrylonitrile solvent containing sodium thiocyanate and N, N-dimethylformamide or dimethyl sulfoxide, and the resultant emulsion is used the solidifying bath prestretching bath, preheating bath, hot stretching bath, or spinning bath before the polyacrylonitrile fibre is spun. Its advantages are excellent antistatic performance and high mechanical property.

A flame-retardant UV curing coating is prepared from the following raw materials in part by weight: 10-12 parts of trimethylol propane triacrylate, 50-55 parts of polyester acrylate, 3-5 parts of isopropanol, 5-8 parts of ethoxylated trimethylolpropane triacrylate, 1-2 parts of tetrabutylphosphonium chloride, 2-3 parts of sodium thiocyanate, 2-6 parts of hexabromocyclododecane, 3-4 parts of diethylene glycol butyl ether, -5 parts of benzil dimethyl ketal, 2-3 parts of 2-hydroxy-2-methyl-1-phenyl-1-acetone, 3-4 parts of dispersing auxiliary agent and 4-5 parts of dispersing auxiliary agent. The flame-retardant UV curing coating has excellent chemical resistance and low temperature resistance, and has strong adhesion to difficultly-adhered substrates, such as plastic; after addition of the dispersing auxiliary agents, the flame-retardant UV curing coating is good in leveling property, can form a uniform and thin coating layer, and is high in curing speed; and by adding tetrabutylphosphonium chloride and the hexabromocyclododecane, the flame-retardant UV curing coating has excellent flame retardance.

The present invention discloses an emulsion gel based polyacrylonitrile / carbon porous material and a preparation method thereof. The method comprises the following steps: with emulsion gel as a template, dissolving polyacrylonitrile in a salt solution of zinc chloride or sodium thiocyanate, then adding a water-soluble monomer, an initiator, a crosslinking agent and an emulsifier into the obtained solution, carrying out uniform dispersing, then adding an oil phase, and carrying out emulsification so as to prepare an emulsion; and placing the emulsion at a certain temperature, allowing the water-soluble monomer in a continuous phase to polymerize so as to prepare the emulsion gel, then placing the emulsion gel into deionized water, carrying out soaking, removing salt in the continuous phase, carrying out freeze drying so as to prepare a polyacrylonitrile porous material, and carrying out cyclization and carbonization so as to prepare a porous material. The preparation method provided by the invention has the advantages of simple preparation process, cheap raw materials and mild preparation conditions; meanwhile, the prepared polyacrylonitrile / carbon porous material has the advantages of low density, high porosity, large specific surface area, good connectivity of internal pores, etc., and has potential application prospects in the fields of catalyst carriers, oil-water separation, etc.

A two-step process using sodium thiocyanate as solvent for treating the sewage generated by west spinning of acrylic fibres includes microelectrolyzing to degrade oligomer, adding flocculant, coagulating while depositing, separation, mixing the polymerized sewage with cyanogen contained sewage, homogenizing, hydrolyzing, acidifying, carbonifying, nitrating, denitrating, post-aerating, and separating the deposit mud from supernatant. Its advantage is high treating effect.

An improved method of preserving a molecule in a bodily fluid comprises: (1) providing a preservative solution comprising: (a) an amount of a divalent metal chelator selected from the group consisting of ethylenediaminetetraacetic acid (EDTA), (ethylenebis(oxyethylenenitrilo))tetraacetic acid (EGTA), and 1,2-bis(2-aminophenoxy)ethane-N,N,N′,N′-tetraacetic acid (BAPTA) and salts thereof in the range of from about 0.001 M to about 2 M; and (b) an amount of at least one chelator enhancing component selected from the group consisting of lithium chloride, guanidinium chloride, guanidinium thiocyanate, sodium salicylate, sodium perchlorate, and sodium thiocyanate in the range of from about 0.1 M to about 10 M; and (2) adding the preservative solution to the bodily fluid, thus preserving the molecule. The molecule can be a protein or a small molecule, such as a steroid. The invention also encompasses preservative compositions suitable for preserving proteins or small molecules, and kits. Preservative compositions can further include at least one enzyme inactivating component selected from the group consisting of manganese chloride, sarkosyl, and sodium dodecyl sulfate in the range of up to about 5% molar concentration. Compositions and methods according to the present invention have many diagnostic and forensic uses, in addition to being suitable for preparing compositions usable by hunters for attracting animals.

At least one of the following compounds is included on a surface layer of a print medium and in an inkjet ink formulation to be printed thereon: potassium iodide, sodium iodide, sodium thiosulfate, potassium thiosulfate, and sodium thiocyanate. The addition of at least one of these compounds to both the print medium and the inkjet ink can improve light fastness on the order of eight to thirteen times or more on porous glossy media. These additives are particularly effective with water-soluble dyes, including such dyes as Reactive Black 31 (Pacified) (RB31), Direct Blue 199 (DB199), Magenta 377 (M377), and Direct Yellow 132 (DY132).

The invention discloses a method for preparing high-quality sodium thiocyanate from a desulfurized and decyanated waste liquid of coke oven gas, which comprises the following steps: decolorizing and filtering the desulfurized and decyanated waste liquid through activated carbon, and adding an assistant A into the waste liquid while stirring, wherein the specific quantity of the assistant A is 50-200% of the molal quantity of sodium thiosulfate in the waste liquid; removing sodium thiosulfate ions in the waste liquid system, filtering to remove insoluble substances, and then adding a small quantity of assistant C into the filtrate to regulate the pH value to 5-10; distilling and concentrating to remove the moisture, and centrifuging to separate out inorganic salt impurities based on the difference of various substances in solubility under different temperatures and concentrations; and decolorizing through activated carbon, and further concentrating and crystallizing to produce the sodium thiocyanate finished product. According to the invention, the process is simple, the cost is low, and the weight content of the produced potassium thiocyanate is more than 99%.

The invention provides a method for preparing erythromycin thiocyanate. The method comprises the following steps of: removing impurities from erythromycin fermentation liquor, and treating by using alkaline liquor; and extracting by using butyl acetate, collecting an organic phase, adding a sodium thiocyanate solution into the organic phase, controlling the pH value to be 4.0 to 6.0, stirring, crystallizing and drying to obtain erythromycin thiocyanate powder. According to the method, the erythromycin fermentation liquor is used as a raw material, and the refined erythromycin thiocyanate is obtained by impurity removal and a mode of combining extraction and the salifying of sodium thiocyanate. The method is easy to operate and low in cost, the requirement of mass production can be met, and a product is high in yield and purity.

The invention discloses a device and a method for extracting refined salt from waste liquid generated during wet ISS-J desulfurization. The device comprises a coarse salt drying assembly, a sodium thiocyanate separating and refining assembly, a sodium thiosulfate separating and refining assembly, a sodium sulfate separating and refining assembly and a solvent recycling assembly. The coarse salt drying assembly comprises a desulfurization waste liquid tank, a heat exchanger, an evaporation kettle, a crystallization kettle and a centrifugal machine; the sodium thiocyanate separating and refining assembly comprises a dissolving kettle, a filter-press kettle, an evaporation kettle, a crystallization kettle, a centrifugal machine, a drying machine and a packaging machine; the sodium thiosulfate separating and refining assembly comprises a dissolving kettle, a condensate tank, a filter-press kettle, a crystallization kettle, a centrifugal machine and a packaging machine; the sodium sulfate separating and refining assembly comprises a dissolving kettle, a concentrate sulfuric acid elevated tank, an evaporation kettle, a centrifugal machine, a drying machine and a packaging machine. The device and the method have the advantages that the waste liquid which can originally pollute environments and is generated by desulfurization systems can be thoroughly treated by the aid of the device and the method, industrial-grade products can be produced from the waste liquid, accordingly, wastewater emission can be truly prevented, and waste can be truly turned into wealth.

The invention provides a composite efficient water reducer and a preparation method thereof. The composite efficient water reducer is prepared from the following components in percentage by weight: 0 to 50 percent of polycarboxylic type water-reducer, 0 to 50 percent of naphthalene-based superplasticizer, 0 to 50 percent of melamine resin water reducer, 0 to 50 percent of aliphatic water reducer, 10 to 50 percent of lignosulfonate, 0 to 50 percent of sulfamate water reducer, 0.1 to 5 percent of sodium gluconate, 0.1 to 5 percent of lauryl sodium sulfate, 0.1 to 10 percent of sodium silicate, 0.1 to 10 percent of potassium methyl silicate, 0.1 to 10 percent of sodium thiocyanate, 0.1 to 10 percent of sodium metaphosphate, 0.1 to 10 percent of triethanolamine, 0.1 to 10 percent of potassium peroxodisulfate and 10 to 65 percent of water. The composite efficient water reducer has the advantages of wide raw material source, simple production method, high production efficiency, remarkable use effect, wide application and suitability for industrial large-scale production.