30 results about "Potassium rhodanide" patented technology

The invention belongs to the technical field of sewage treatment, in particular to a method for preparaing dephosphorized and ferrum-carried activated carbon adsorbent, which comprises the following steps of: soaking powdered activated carbon through hydrochloric acid, washing through water, and drying at the temperature of 100-150 DEG C; injecting the obtained activated carbon into strong oxidizing acid solution so as to be soaked, rinsing, and drying a rinsed sample; and finally, mixing the obtained activated carbon and inorganic ferric salt solution, stirring, re-drying, cooling to room temperature, removing surface layer coverings, washing unloaded ferric oxide through water until rinsing to be without obvious color and without red color through test by potassium rhodanide solution, and drying continuously to obtain the high-efficient dephosphorized activated carbon adsorbent rich in iron oxide compound. Compared with the prior art, the method has the advantages of simplicity, moderate preparing condition, easiness in implementation, strong operability, high processing efficacy for waste water containing phosphorus, and purification cost reduction.

The invention relates to bivalent cation magnetic ionic liquids and a preparation method thereof, and belongs to the technical fields of novel chemical materials and preparation. N-alkyl imidazole, 1,m-dibromoalkane, 1,m-dicholoroalkane, ferric trichloride, lanthanide metal oxide, potassium rhodanide and aqueous solution of perchloric acid are taken as raw materials to be prepared into the bivalent cation magnetic ionic liquids with different anion structures; and compared with the conventional magnetic ionic liquid, the magnetic ionic liquids have high magnetism, magnetic controllability and higher thermal stability. The invention realizes magnetic designability of the magnetic ionic liquids for the first time, and promotes the application of the magnetic ionic liquids in the fields such as aviation, medicines, biology and the like.

The invention discloses a determination method of copper in raw gold, and belongs to a determination method of copper in raw gold. The determination method comprises the following steps: firstly usingnitric acid to dissolve most silver in a specimen, then adding hydrochloric acid to form an aqua regia system to completely dissolve the specimen, using sulphurous acid to precipitate and separate gold, filtering, using a filter residue to recycle the gold, adding sulfuric acid in filter liquor, and evaporating until the filter liquor is approximately dry, then using sulfuric acid to dissolve a precipitate, using ammonium hydroxide to adjust until blue copper ammonia complex ions appear, adding 0.5 g of ammonium hydrogen fluoride, shaking uniformly, adding 3 g of potassium iodide, instantly using a sodium thiosulfate standard titration solution to be titrated until the solution is light yellow, adding 5 mL of a starch solution, continuously titrating until the solution is light blue, adding 0.5 to 1.0 g of potassium rhodanide, intensively shaking until blue color is deepened, then titrating until blue color justly disappears, recording the volume V1 of the consumed sodium thiosulfatestandard titration solution, and calculating the content of copper in the raw gold. The determination method has the advantages that the content of the copper in the raw gold can be accurately determined, the method is applicable to mass analysis, and meanwhile the blank of the determination method for the copper content in the raw gold is filled.

The invention relates to an industrialization production method of antithyroid drug 2-mercapto-1-methylimidazole. The method comprises: (a) reacting vinyl acetate with bromine in absolute ethyl alcohol, regulating a pH value into alkalescence after reaction, obtaining a bromoacetaldehyde diethyl acetal crude product after extraction and desolventization, and directly adding the bromoacetaldehyde diethyl acetal crude product into a next step of reaction; (b) performing aminolysis reaction of bromoacetaldehyde diethyl acetal and methylamine aqueous solution, and after completing reaction, obtaining methylamino acetal through distilling, separating and purifying after extraction and de-watering; (3) dropping hydrochloric acid into aqueous solution of methylamino acetal and potassium rhodanide; removing water in the reaction solution by reduced pressure distillation after reaction, removing a part insoluble in ethyl acetate from the obtained solid, dissolving residual solid into water with pH being 1-2, crystallizing to obtain 2-mercapto-1-methylimidazole with purity higher than 99%, and then vacuum-drying to obtain a finished product. The production method has a short product line, can obtain 2-mercapto-1-methylimidazole with high purity, and has a strong industrialization prospect.

The invention discloses a uric acid detection method based on silver triangular nanoflakes. The uric acid detection method comprises the following steps that the silver triangular nanoflakes are prepared; a to-be-detected sample is added into the silver triangular nanoflakes, then potassium rhodanide is added, and at this moment, if the absorption peak at 400 nm is weakened and the absorption peakat 575 nm rises again, it is expressed that the to-be-detected sample contains uric acid. The detection method is high in flexibility and selectivity.

The invention discloses a method for preparing high-quality potassium rhodanide by using a coke oven gas waste liquor with sulfur and cyanogen removed. The method comprises the steps of: first adding an assistant S to the waste liquor to remove cyanide ions in the waste liquor system, wherein the addition is 50%-200% of the molar weight of cyanide ions; adding an assistant E according to the contents of carbonate radicals, bicarbonate radicals and sulfate radicals to remove the three, wherein the addition is 50%-200% of the total molar weight of the carbonate radicals, bicarbonate radicals and sulfate radicals; adding an assistant D and regulating the pH value to 4-10; and conducting concentration and decoloring with activated carbon, and concentrating and crystallizing to obtain a finished product. The method disclosed by the invention has simple process and low cost; and the output product contains more than 99 wt% of potassium rhodanide.

The invention discloses a glaze with silver-like metal luster. The glaze with silver-like metal luster comprises a glass glaze, sodium dichromate, copper oxide, nickel oxide, refractory clay and potassium rhodanide. The glaze with silver-like metal luster has the advantages of reasonable formula, good work effects and low production cost.

The invention discloses an icing cold-accumulating agent which consists of sodium carboxymethylcellulose, sodium tetraborate, propanetriol, potassium rhodanide and water. The invention has reasonable formula, good usage effect and low production cost.

The invention discloses an analysis method for determining copper in a tin-silver-copper solder through iodometry. The method comprises the steps of weighing a unit of a sample and putting into a 250 ml conical flask, adding a proper amount of concentrated sulfuric acid, heating, dissolving the sample, taking down the conical flask, cooling to room temperature, adding a proper amount of perchloric acid, heating till a perchloric acid white smoke is emitted after the sample is completely dissolved, dropwise adding hydrochloric acid for a plurality of times to remove tin, concentrating the solution to a small volume, taking down the flask, cooling to the room temperature, and shaking uniformly. Adding a proper amount of ammonium hydroxide solution into the sample to form a solution which is complex copper ammine ion blue, adding a proper amount of ammonium bifluoride, shaking till the blue disappears, cooling the flask to the room temperature with a cold water flow, standing for 30 seconds, adding a proper amount of potassium iodide, titrating with a sodium thiosulfate standard solution immediately to light yellow, adding a proper amount of potassium rhodanide and a starch solution, titrating continuously with the sodium thiosulfate standard solution till the blue disappears, and recording the milliliter quantity.

The invention discloses a chemical pretreatment method of steel products and a used pickling solution. The chemical pretreatment method of steel products comprises four procedures of pickling, degreasing, washing, and phosphorizing, wherein coarse alkali is adopted in degreasing fluid; acrylonitrile-ethylene-styrene (AES) and anionic polyacrylamide (APAM) surfactants are respectively utilized to solve the demands of a normal temperature process on an active agent in the pickling and degreasing procedures; molybdate iron phosphating liquid is adopted in phosphorization; the used acid liquor comprises the following components in grams per liter: 101-135 g/L of sulfuric acid, 3 g/L of potassium rhodanide, 3 g/L of teiethylene tetramine-hexacetic acid, 3 g/L of acetamidine hydrochloride and 3 g/L of di-o-tolyl-thiourea; the mass concentration of the sulfuric acid is 15-19%. The method is simple in process, fewer in procedures, and free of an external heating device; about 80% of water can be saved; equipment investment can be reduced; about 70% of electricity can be saved in normal operation.

The invention discloses a cleaning agent for cleaning dirt on printing and dyeing rotary drums and application of the cleaning agent. The cleaning agent in a formula comprises, by weight, 5-12 parts of oxygen acid, 0.2-1 part of potassium rhodanide, 2-4 parts of acetic acid, 2-4 parts of nitric acid, 2-4 parts of iron chloride, 0.1-0.8 part of permeating agents, 0.2-1 part of corrosion inhibitors,0.1-0.5 part of aniline, 0.1-0.6 part of emulsifiers and 100-150 parts of water. The mass fraction of the nitric acid is 3-5%. The cleaning agent and the application have the advantages that different types of oxygen acid jointly cooperate with the corrosion inhibitors, the permeating agents and the emulsifiers in the cleaning agent, and accordingly unique permeation, peeling, decomposition and diffusion effects and the like can be realized; decomposition and combination chemical reaction and the like in different forms can be carried out on the cleaning agent and the dirt, and accordingly the purpose of clearing the dirt without damage on the surfaces of equipment can be ultimately achieved by the cleaning agent.

The invention relates to a color change bar, which consists of a bent plastic outer tube and a glass capillary tube encapsulated inside the plastic outer tube, and is characterized in that sodium nitrite and ferric trichloride are encapsulated in the glass capillary tube, and potassium rhodanide, citric acid, EDTA (ethylene diamine tetraacetic acid), methylene green and tap water are encapsulated between the plastic outer tube and the glass capillary tube. When the bent plastic outer tube is used, the glass capillary tube fractures, and at the moment, raw material ingredients are mixed, and color change reaction is generated. The color change bar provided by the invention has the advantages that the structure is simple, the manufacture cost is low, and in addition, the environment is protected, and certain color change bars can realize the color change for many times. The color change bar belongs to an ideal toy for children.

The invention provides a solid culture medium for separating and purifying extremely thermoacidophilic archaea and a preparation method thereof. The solid culture medium comprises the following components: jelly powder, potassium rhodanide, ferrous sulfate, yeast powder, and a 9K basic culture medium. The preparation method (1L) comprises the following steps of: preparing liquid A, namely regulating the pH value of 400 to 550ml of distilled water to be between 1.8 and 2.5, and adding 2 to 3g of jelly powder; preparing liquid B, namely regulating the pH value of 150 to 300ml of 9K basic culture medium to be between 1.8 and 2.5, and adding 5 to 11g of potassium rhodanide and 5 to 9ml of yeast powder mother liquor (0.2g/L); preparing liquid C, namely adding 9 to 15g of ferrous sulfate into 50 to 100mL of 9K basic culture medium, regulating the pH value to be between 1.8 and 2.5, and filtering and sterilizing by a filter membrane; and sterilizing the liquid A and the liquid B at high temperature respectively, cooling for 5 to 10 minutes, filtering by using a gauze respectively, uniformly mixing with the liquid C, and adding the distilled water until the volume is 1L. The extremely thermoacidophilic archaea can be separated and purified by a plate method on the basis of the culture medium.

The invention relates to a coke oven gas desulfurization waste liquid recycling method. According to the technical scheme, a decolorising agent is added into filtered coke oven gas desulfurization waste liquid for discoloring to obtain faint yellow clarified waste liquid; the faint yellow clarified waste liquid is subjected to vacuum evaporation, concentrated liquid obtained after evaporation is centrifugally separated, and a salt mixture and filtrate I are obtained; an organic solventing-out agent and an extraction agent are used for refining the salt mixture, and potassium thiosulfate and potassium rhodanide are obtained; iron vitriol is added into the filtrate I, stirring is carried out, precipitate is obtained, acid pickling and centrifugation are carried out, and a ferric ferrocyanide product is obtained. The coke oven gas desulfurization waste liquid recycling method has the advantages of being easy to operate and low in cost; coke oven gas desulfurization waste liquid can meet the water quality requirements for biochemical treatment, the recycling rate of thiosulfuric acid radical and thiocyanate radical in the coke oven gas desulfurization waste liquid is high, and the product purity is high.