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67 results about "Sodium sulfocyanate" patented technology
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Process for preparing antibacterial polyacrylonitrile fiber
InactiveCN1807712AImprove antibacterial propertiesAntibacterial function can be regeneratedMonocomponent synthetic polymer artificial filamentWet spinning methodsAntibiosisSodium sulfocyanate
The invention discloses an antibiotic polyacrylic fibre preparing method, which comprises the following steps: (1) dissolving 3-allyl group-5, 5-dimethyl hydantoin and acrylic nitrile in solvent (total integral mass concentration: 5%-50%); adding in initiating agent; joining chain transfer agent; proceeding free radical aggregation at the temperature of 40-78deg. c for 0. 5-10 hours; (2) dissolving copolymer in sodium sulfocyanate aqueous solution; getting spinning solution after vacuum defoamation at the temperature of 20-70deg C; (3) proceeding spinning with wet method; obtaining modified acrylics; (4) impregnating polyacrylic fibre in sodium hypochlorite or sodium hypobromite aqueous solution; sluicing out with water; getting antibiotic polyacrylic fibre. The prepared polyacrylic fibre has the features of strong, long-lasting, recoverable antibiosis ability.
Owner:DONGHUA UNIV
Early-strength water reducer for recycled aggregate concrete
The invention provides an early-strength water reducer for recycled aggregate concrete, which is suitable for the field of building materials. The the early-strength water reducer comprises the following raw materials by weight percent: 20-25% of a polycarboxylic acid water reducer, 1-6% of tri-isopropanolamine, 0.5-2% of triethanolamine, 5-15% of sodium sulfocyanate, 3-10% of calcium formate, and 42-70.5% of water. The early-strength water reducer provided by the invention is low in dosage, good in early-strength effect, free from chloride ions, resistant to the corrosion of steel bars, suitable for recycled concrete, and capable of enhancing the early strength of a recycled concrete product and improving the peaceability of a recycled concrete mixture.
Owner:北京新奥混凝土集团有限公司
Deplating liquid for NiCuNi plating on surface of sintered NdFeB and deplating process thereof
InactiveCN102787321AFast stripping speedImprove deplating efficiencySodium sulfocyanatePotassium thiocyanate
The invention discloses a deplating liquid for a NiCuNi plating on the surface of sintered NdFeB and a deplating process thereof. The deplating liquid for the NiCuNi plating on the surface of sintered NdFeB adopts deionized water or clean tap water as the liquid solvent, and all components and component contents are as follows: 60-90g / L reserve salt S, 120-150ml / L ethylene diamine, 20-40g / L anti-corrosion complexing agent and 50-100ml / L mineral acid. The solute further comprises a surface active agent of 0.5-1g / L. The anti-corrosion complexing agent is sodium citrate or triammonium citrate; the mineral acid is nitric acid or ammonium nitrate; and the surface active agent is potassium thiocyanate, or sodium sulfocyanate or ammonium thiocyanate. The deplating process comprises the following steps: preparing a deplating bath; disposing a deplating liquid; executing the deplating; and removing the deplating liquid on a product. The deplating liquid has the advantages of stable property, good deplating effect and low cost; and the deplating operation is simple and convenient, pollution is prevented, body harm of operators is relieved, waste is changed into valuable and the benefits are remarkable.
Owner:牛凯
Method for separating butane and butene by using multiple mixed solvent
InactiveCN101417913ARetain solubilityImprove solubilityDistillation purification/separationBulk chemical productionSodium sulfocyanateTetrafluoroborate
The invention relates to a method for spearing butane from butylene with the multicomponent compound of ionic liquid, saline, ethyl methyl ketone and N-formylmorpholine. The content of ionic liquid in the multicomponent compound is 1.0 to 95 percent; the content of the saline in the multicomponent compound is 0.5 to 20 percent; the electropositive ion of the ionic liquid is iminazole electropositive ion, alkyl imidazole electropositive ion or alkyl quaternary ammonium ion, or the compound thereof; the electronegative ion is tetrafluoroborate electronegative ion, hexafluorophosphoric acid electronegative ion, nitrate ion, tetrachloro aluminic acid iron, heptachlor bi aluminic acid iron, chloride ion, bromine electronegative ion or the mixture; and the ionic liquid can be dimethylformamide potassium thiocyanate compound salt, dimethylformamide sodium sulfocyanate compound salt, or the compound; the saline is potassium thiocyanate, sodium sulfocyanate, ammonium thiocyanate, sodium nitrate, potassium nitrate, sodium iodide, potassium iodide, zinc chloride, copper chloride, zinc chloride, potassium bromide, or the compound thereof.
Owner:YANTAI UNIV
Production process of colored flat acrylic fiber and production line thereof
InactiveCN101922059AIncrease extrusion speedSolve the problem of uneven spinning and dyeingArtificial thread manufacturing machinesWet spinning methodsProduction lineSodium sulfocyanate
The invention relates to a production process of colored flat acrylic fiber and a production line thereof, which are a production process and a production line thereof for producing the colored flat acrylic fiber in a plurality of color systems with vivid colors, little chromatic aberration and great flatness by adopting a cationic dye, in particular to a spinning production line for producing the colored flat acrylic fiber by adopting a ternary aqueous suspension polymerization and sodium sulfocyanate wet method. In the invention, a long-strip arc dye liquor spray head is used for dying, and the long-strip arc dye liquor spray head is an arc spray head which comprises a spray head seat, a spray head cover and a dye liquor inlet pipe and has a hollow T-shaped cross section, wherein the spray head is a long-strip semi-cylindrical surface, and a plurality of penetrative spraying holes are arranged on the spray head cover in a staggered way. The invention overcomes the defects of stripy and uneven dyeing, great chromatic aberration, large volume of colored wastewater, long product processing period, and the like commonly existing in a production process and a production line thereof for producing white flat acrylic fiber by adopting a traditional dyeing mode of steaming loose fibers at a high temperature.
Owner:DONGHUA UNIV
Method for recovering sodium sulfocyanate from desulfurized and decyanated wastewater of coke-oven gas
InactiveCN102336417AEliminate pollutionAchieving a circular economyThiocyanic acidChemical reactionSodium sulfocyanate
The invention discloses a method for recovering sodium sulfocyanate from coke-oven gas wastewater that is desulfurized and decyanated through a sodium alkali method. Belonging to a pure physical separation technology, the method of the invention has no need for additional accessories to take part in a reaction and does not discharge any wastewater and waste material to the outside, thus really reaching the purposes of eliminating environmental pollution, utilizing waste materials, change waste materials into things of value and realizing circular economy. The method provided in the invention has the advantages of novel technology, simple process, low cost, advanced technique, and practical applicability.
Owner:苏州久王环保科技股份有限公司
Grinding aid for preparing cementing material for filling and dry stacking of mines
The invention discloses a grinding aid for preparing a cementing material for filling and dry stacking of mines. The grinding aid comprises the following raw material components in percentage by mass: 20%-30% of modified polymeric glycol, 5%-15% of diethanolisopropanolamine, 10%-20% of molasses, 5%-10% of sodium sulfocyanate, 5%-10% of sodium metaaluminate, 5%-10% of sodium fluosilicate and the balance of water. According to the grinding aid provided by the invention, the problems that a mixed material of water granulated slag, quick lime, water glass and the like is liable to cause ball pasting and is difficult to be finely ground in a grinding process are solved, the fluidity of the cementing material can be remarkably improved, the grinding efficiency of a ball mill can be improved, the machine-hour yield of the ball mill can be increased, the early strength of the cementing material can be remarkably improved, and the long-term strength of the cementing material can be properly improved.
Owner:SINOSTEEL MAANSHAN INST OF MINING RES
Method for synthesizing compound of cefpiramide sodium
The invention relates to a synthesis method of cefpiramide sodium, including reacting of cefpriamide free acid with triethylamine, diethylamine or diethylamine in the organic solvent in -10-40 deg c, then getting mixture after reaction, dripping 10-15wt% sodium sulfocyanate acetone solution, adjusting pH to 6-8, filtering, drying to obtain cefpiramide sodium. The synthesis cefpiramide sodium has an even polytype, a good color, a high purity, and a good product stability and a safe conservation.
Owner:武汉同源药业有限公司
Production method for dithiocyano-methane
The invention discloses a production method for dithiocyano-methane. The dithiocyano-methane is prepared by condensation of sodium sulfocyanate and methylene dichloride in medium water and a sealed reaction kettle, and the production method comprises the steps of synthesis, crystallization, filtration, washing, secondary filtration, product refining, drying and the like. The production method has the advantages that the dithiocyano-methane produced by the method has high content, low loss rate, low production cost and wide application.
Owner:XINGNING FINE CHEM FACTORY
Cement grinding aid and preparation method thereof
The invention discloses a cement grinding aid and a preparation method thereof. The cement grinding aid concretely comprises, by weight, 3-7 parts of saltcake, 1-5 parts of industrial salt, 0.5-1.5 parts of sodium nitrite, 0.5-1.5 parts of sodium hyposulfite, 1-3 parts of sodium acetate, 0.5-1.5 parts of sodium sulfocyanate, 2-6 parts of triethanolamine, 0.5-1.5 parts of glycol, 0.3-0.7 parts of glycerol, 0.3-0.7 parts of polyethylene glycol, 0.5-1.5 parts of a high efficiency water reducer and 0.5-1.5 parts of a high efficiency reinforcing agent. The amounts of all materials in the cement grinding aid are controlled in order to effectively control the concentrations of chloride ions and alkalis in finished cement. Additionally, reduction of the amount of triethanolamine in the above formula greatly reduces the production cost of present cement grinding aids.
Owner:徐福明 +1
Method for preparing 2-chlorine-5 chloromethyl thiazole
InactiveCN104119291AShort reaction timeExperiment operation is simpleOrganic chemistryIsomerizationSodium sulfocyanate
The invention relates to a method for preparing 2-chlorine-5 chloromethyl thiazole. The method comprises the following steps of: preparing 2-chlorine-5 chloromethyl thiazole by taking 2,3-dichloropropene, sodium sulfocyanate, sulfuryl chloride sulfuryl chloride and the like as main raw materials and changing a reaction solvent, reaction temperature and the like; purifying the product. An experimental result indicates that the method in which 2-chlorine-5 chloromethyl thiazole with the purity of 99% is prepared from 2,3-dichloropropene and sodium sulfocyanate through a one-pot process sequentially including substitution reaction, isomerization reaction and chlorination-cyclization reaction by taking methylbenzene as a solvent has the advantages of simple operation, few side reactions and high efficiency.
Owner:SHAOXING UNIVERSITY
Chlorohydric acid pickling corrosion inhibitor and preparation method thereof
The invention provides a chlorohydric acid pickling corrosion inhibitor and a preparation method thereof. The chlorohydric acid pickling corrosion inhibitor is formed by combing sodium sulfocyanate, imidazoline and a derivative thereof, an acid pickling fog inhibitor, aniline and pure water. The mass ratio of sodium sulfocyanate, imidazoline and a derivative thereof, an acid pickling fog inhibitor, aniline and pure water is as follows: (3-8): (10-20): (5-15): (5-10): (47-77). The invention provides the preparation method of the chlorohydric acid pickling corrosion inhibitor, five substances are sequentially put into an agitation vessel in a certain mass ratio and then stirred and dissolved, so that the chlorohydric acid pickling corrosion inhibitor can be obtained. According to the chlorohydric acid pickling corrosion inhibitor and the preparation method thereof, five substances are compounded and used in a certain mass ratio; during chlorohydric acid pickling, the corrosion inhibition effect of the chlorohydric acid pickling corrosion inhibitor on low-carbon steel is superior to any one used separately of the substances; and besides, the dosage is smaller than that of existing domestic chlorohydric acid pickling corrosion inhibitors, so that the acid pickling reagent cost can be saved. The dosage of the chlorohydric acid pickling corrosion inhibitor is small; corrosion of hydrochloric acid to a metallic matrix of a cleaned device can be reduced substantially; and the chlorohydric acid pickling corrosion inhibitor can be widely applied to the field of chlorohydric acid pickling for industrial devices.
Owner:WEIHAI XIANGYU TECH
Sodium sulfocyanate adulteration qualitative detection method for material milk
InactiveCN101126720AObvious phenomenonHigh detection sensitivityMaterial analysis by observing effect on chemical indicatorTesting dairy productsChemical compositionSodium sulfocyanate
The utility model relates to a test method, in particular to a test method for adulteration of sodium sulfocyanate in raw milk, belonging to the technical filed of chemical composition test. In the test method for adulteration of sodium sulfocyanate in raw milk, the test is conducted according to the following steps: adding in the ferric salt solution of certain concentration in raw milk sample and judging whether the adulteration of sodium sulfocyanate exists in the raw milk sample according to the color change of the contact surface of ferric salt and raw milk sample. The test limit of the method is 0.01%.
Owner:INNER MONGOLIA MENGNIU DAIRY IND (GRP) CO LTD
Method for preparing carbon fiber precursor by employing sodium thiocyanate through dry and wet spinning process
ActiveCN105525388ARealize industrial applicationIncrease concentrationFibre chemical featuresSpinning solutions preparationFiberSodium sulfocyanate
The invention discloses a method for preparing carbon fiber precursor by employing sodium thiocyanate through a dry and wet spinning process. The method comprises the following steps: taking a sodium sulfocyanate aqueous solution as a solvent for polymerization to obtain a polymerization stock solution, passing the polymerization stock solution through a first demonomerization tower for removing an unreacted monomer in the polymerization stock solution, then preheating the material to the temperature of 75-85 DEG C and introducing the material into a second demonomerization tower, and wherein content of a residual monomer is controlled at less than or equal to 0.1%, preheating the demonomerized polymerization stock solution to the temperature of 70-95 DEG C, defoaming the polymerization stock solution under a pressure reduction state and then dehydrating, then performing multistage cyclic preheating, defoaming and dehydrating to obtain the high-density (high solid content) spinning stock solution which satisfies the dry and wet spinning requirements, and spinning to obtain the carbon fiber precursor. The method is simple, the obtained carbon fiber precursor has good wire drawing capability, nozzle stretching is stable, breakage rate is little, precursor dispersion is little, and intensity is high.
Owner:CHINA PETROLEUM & CHEM CORP +1
23-percent tebuconazole.thiram suspension seed coating agent
InactiveCN102396479AEfficient killingImprove frost resistanceBiocideClimate change adaptationSodium sulfocyanatePlant growth
The invention discloses a wheat seed coating agent, which comprises an active component bactericide, a plant growth regulator, an inactive component coating agent and an aid, and concretely comprises the following components in percentage by weight: 0.5 to 2.0 percent of tebuconazole, 21 to 22.5 percent of thiram1.5 to 2.2 percent of concentrated emulsion No.500, 2.4 to 3.0 percent of concentrated emulsion No.600, 0.5 to 1.7 percent of di-secondary sodium sulfocyanate, 0.05 to 0.15 percent of xanthan gum, 0.3 to 4.0 percent of dimethicone, 4.5 to 5.5 percent of ethylene glycol, 0.5 to 2.0 percent of warning color and the balance of water. The total content of tebuconazole and thiram is 23 percent. The seed coating agent has the characteristics of high suspension rate, high coating property, uniform coating, low stripping rate, low toxicity, convenient use and the like. The seed coating agent to seed ratio is high, so the seed coating agent is economic to use, and the cost of the seed coating agent is lower than those of products of the same kind. The germination rate of the wheat seeds can be improved by 10 percent, the incidence of rust disease and dust-brand in wheat fields is reduced by about 30 percent, and the yield of the wheat is increased by over 10 percent.
Owner:XINJIANG JINHUA PESTICIDE
Synthetic method of thiocyano propyl trialkoxysilane
ActiveCN105061485AReduce dosageNo pollution in the processGroup 4/14 element organic compoundsSodium sulfocyanateAlcohol
The invention relates to a synthetic method of thiocyano propyl trialkoxysilane, which belongs to the field of organic chemistry. According to the invention, a self-made catalyst is employed, chloropropyltrialkoxysilane and sodium sulfocyanate are used for synthesis of thiocyano propyl trialkoxysilane and common salt under certain reaction condition, filter residue of common salt can be filtered and separated, the filter residue is washed by a corresponding alcoholic solution, the washing lotion recovers the corresponding alcohol under normal pressure, and is distilled with crude product to obtain the thiocyano propyl trialkoxysilane product. The thiocyano propyl trialkoxysilane product has the characteristics of high quality, good stability, little impurity, no waste material discharge, no environmental pollution, and easy industrial production.
Owner:JINGZHOU JIANGHAN FINE CHEM
Acridine-1,2,4-triazole-5-thioketone compound and preparation method and applications of acridine-1,2,4-triazole-5-thioketone compound
ActiveCN104277028AIncrease the conjugate areaEasy to embedOrganic active ingredientsOrganic chemistrySodium sulfocyanateThioketone
The invention discloses an acridine-1,2,4-triazole-5-thioketone compound and a preparation method and applications of the acridine-1,2,4-triazole-5-thioketone compound. The preparation method of the compound comprises the following steps: 1) by taking an o-bromobenzoic acid and p-methoxyaniline as raw materials, taking potassium carbonate and copper powder as catalysts, and taking isopentyl alcohol or n-amyl alcohol as a solvent, reacting so as to obtain a compound 1; 2) carrying out cyclization on the compound 1 by using phosphorus oxychloride so as to obtain a compound 2; 3) after the compound 2 is dissolved by using an organic solvent, in the presence of tetrabutylammonium bromide, reacting the dissolved compound 2 with sodium sulfocyanate so as to obtain a compound 3; 4) after the compound 3 is dissolved by using an organic solvent, reacting the dissolved compound 3 with m-nitrobenzoylhydrazine so as to obtain a compound 4; and 5) reacting the compound 4 with sodium carbonate, carrying out suction filtration on a reactant, collecting filter liquor, adjusting the pH value of the filter liquor to be less than 4, separating out precipitates, and carrying out suction filtration on the precipitates. In-vitro antitumor test results show that the compound has a significant in-vitro antitumor activity to tested MGC80-3, NCI-H460 and T24.
Owner:广西新桂环保科技集团有限公司
Alizarin red pH response color-changing fibers and preparation method thereof
InactiveCN104726954AReduce intensityMeet weaving needsMonocomponent synthetic polymer artificial filamentDye addition to spinning solutionSodium sulfocyanateColor changes
The invention relates to alizarin red pH response color-changing fibers and a preparation method thereof. According to the preparation method, alizarin red with the dry weight accounting for 0.05%-2% of that of polyacrylonitrile is added into spinning liquid taking 58%-60% sodium sulfocyanate (NaSCN) aqueous solution as a solvent and containing 11%-14% of polyacrylonitrile for wet spinning. The prepared fibers are uniform in coloring and excellent in color fastness, and have weaving mechanical properties and obvious pH response color changing performance.
Owner:YANCHENG JUNLONG YARN CO LTD
Antifreezing cement and preparing method thereof
InactiveCN102910873AImprove antifreeze effectImprove long-term durabilityCalcium silicateSodium sulfocyanate
The invention discloses antifreezing cement which comprises the following component percentage by weight: 0.01-0.3% of calcium metaaluminate, 0.05-0.9% of glass fiber, 0.05-0.65% of sodium carbonate, 0.1-0.3% of sodium sulfocyanate, 0.8-1.0% of tobermorite, 0.05-0.65% of sodium chloride, 0.08-0.95% of calcium chloride, 0.1-0.9% of triethanolamine, 0.1-2.0% of alum, 0.05-1.5% of gypse antifreezing component and Portland cement clinker in balancing amount. The antifreezing cement disclosed by the invention has a good antifreezing good and favorable long-term durability.
Owner:关卉
Research and development of ally isothiocyanate
A purpose of the present invention is to provide a synthesis method of ally isothiocyanate. According to the method, novel compound catalysts such as sodium lauryl sulfate and tributyl phosphate are used to catalyze, water is adopted as a solvent, sodium sulfocyanate and allyl chloride are adopted as raw materials, a molar ratio of the sodium sulfocyanate to the allyl chloride is 1.02:1-1.04:1, the allyl chloride is pumped into a nitrogen protected stainless steel reaction kettle by using a metering pump to carry out a heterogeneous reaction, washing is performed 3 time with 10% edible salt water, the organic phase is dried with anhydrous sodium sulfate, suction filtration is performed, the filtrate is subjected to pressure reducing distillation, and the product is collected, wherein the obtained ally isothiocyanate is the colorless and transparent liquid, the product yield (calculated as the allyl chloride) achieves more than or equal to 97%, the product achieves more than or equal to 99.5%, and the moisture content is less than 0.1%.
Owner:徐州诺特化工有限公司
Corrosion resistant heat radiation paint for LED lamp and preparation method thereof
InactiveCN103555126AWeather resistance is notDoes not change colorAnti-corrosive paintsSodium sulfocyanatePolyvinyl alcohol
A corrosion resistant heat radiation paint for an LED lamp is prepared by the raw materials by weight: 40-45 parts of aniline formaldehyde resin, 12-15 parts of terpolycyantoamino-formaldehyde resin, 3-4 parts of Dipropylenetriamine, 4-6 parts of double benzylamine ether, 4-4 parts of silane coupling agent KH550, 30-35 parts of aluminium nitride powder, 4-6 parts of beryllia, 8-10 parts of polyvinyl butyral, 2-3 parts of ethylene terephthalate, 4-9 parts of dimethicone, 2-3 parts of titanium dioxide, 1-2 parts of sodium sulfocyanate, 1-2 parts of hexabromocyclododecane, 8-10 parts of ethyl methyl ketone, 18-22 parts of ethyl acetate, and 4-5 parts of film forming auxiliary agent. Aluminium nitride powder and beryllia is added, so as that the paint has good heat conduction rate and good heat radiation effect, without changing mechanical properties; titanium dioxide is added, so as that the paint has a ultraviolet ray shielding function; aniline formaldehyde resin is added, so as that the paint has corrosion inhibition effect in an acidic medium; and the paint has weatherability, without color change and brightness reversion under high temperature baking.
Owner:天长市天泰光电科技有限公司
Novel method for synthesizing 2-amino-2-thiazoline-4-carboxylic acid
The invention discloses a method for preparing 2-amino-2-thiazoline-4-carboxylic acid. 3-X-lactamine hydrochloride and sodium sulfocyanate react in medium water to generate 3-X-2-thioureido monoprop, and the 3-X-2-thioureido monoprop has a ring-closure reaction to prepare the 2-amino-2-thiazoline-4-carboxylic acid. The method is simple, convenient to operate, has high yield coefficient which is more than 95 percent, and greatly enhances the quality of products.
Owner:山东祥维斯生物科技股份有限公司
High performance liquid chromatographic method for detecting mass concentration of sodium sulfocyanate in milk and dairy product
InactiveCN105510461AHigh detection sensitivityThe pre-processing process is simpleComponent separationSodium sulfocyanateColumn temperature
The invention discloses a high performance liquid chromatographic method for detecting the mass concentration of sodium sulfocyanate in milk and a dairy product. The method comprises the following steps: adding acetonitrile in the a milk or dairy product sample, precipitating to remove protein from the milk or dairy product sample, removing part of water-soluble vitamin and amino-acid with a solid phase extraction column, collecting an eluent, and conducting centrifugal degrease on the eluent to obtain a semi-product for standby use; determining chromatographic conditions as follows: a chromatographic column is an Agela-ASB C18 chromatographic column, column temperature is 25 to 30 DEG C, flow velocity is controlled to be 0.8 mL / min, detection wavelength is 200 to 218 nm, and the sampling quantity is 8 to 10 [mu]m. The high performance liquid chromatographic method is based on a reversed-phase ion-pair chromatographic method, and is simple in pretreatment, high in detection sensitivity, good in accuracy, stable in result, and wide in popularization.
Owner:青岛市动物疫病预防控制中心
FISH pretreatment method and pretreatment fluid for FFPE sample
ActiveCN105018598AReduce fluorescenceLow backgroundMicrobiological testing/measurementPretreatment methodTrypan blue
The invention discloses a FISH pretreatment method and pretreatment fluid for an FFPE sample. The pretreatment fluid comprises a pretreatment fluid I, a pretreatment fluid II and a pretreatment fluid III, wherein, the pretreatment fluid I is at least one selected from the group consisting of an EDTA solution, a citric acid buffer and a sodium sulfocyanate solution, the pretreatment fluid II is at least one selected from the group consisting of pontamine sky blue with a concentration of 0.01 to 0.5% and trypan blue with a concentration of 0.025 to 1%, the pretreatment fluid III is sodium borohydride with a concentration of 0.1 to 5%, and the above-mentioned substances are weighed according to a mass volume ratio. The pretreatment method is composed of a plurality of steps. The FISH pretreatment method and pretreatment fluid provided by the invention can substantially reduce FISH autofluorescence and background of liver cancer FFPE.
Owner:AMOY DIAGNOSTICS CO LTD
Simultaneous detection method of plurality of dopants in milk powder
The invention belongs to the technical field of food analysis, and more specifically provides a simultaneous detection method of plurality of dopants in milk powder. According to the simultaneous detection method of plurality of dopants in milk powder, a raman spectrometer is used, and the dopants comprise melamine, dicyandiamide, and sodium sulfocyanate. The simultaneous detection method comprises steps of preparation of chitosan-SERS paper chromatography, pretreatment of milk powder samples, separation of paper chromatography, and SERS detection. A preparation method of self-made SERS paper chromatography is simple; cost is low; separation effect is excellent; the raman spectrometer is convenient to carry; the simultaneous detection method is suitable for on-site rapid detection; the pretreatment process of the milk powder samples is simple, and only filtering is needed; an obtained non-blank spectrogram is compared with the standard raman spectrograms of the above three dopants point by point so as to determine whether a detected sample contains the dopants; no reference experiment is needed; the toxicity of a selected developing solvent is relatively low; the developing solvent is friendly to the environment; separation of the dopants is impossible to realize with other developing solvents; separation detection time of the samples is shorter than 25min; and on-site rapid detection can be realized.
Owner:SECOND MILITARY MEDICAL UNIV OF THE PEOPLES LIBERATION ARMY
Low-carbon and environmental-protection bulk emulsion explosive
InactiveCN102924194AEmission reductionReduce generationExplosivesSodium bicarbonateSodium sulfocyanate
The invention discloses a low-carbon and environmental-protection bulk emulsion explosive and its preparation method. The bulk emulsion explosive is formed through sensitizing an emulsification matrix by a sensitization liquid, wherein the emulsification matrix is obtained through an emulsification action of an aqueous solution of an oxidant salt and an oil phase, and the aqueous solution of the oxidant salt comprises ammonium nitrate, thiourea and water; the oil phase comprises paraffin oil or machine oil, and an emulsifier; and the sensitization liquid comprises sodium nitrite, sodium sulfocyanate or sodium bicarbonate, and water. The emulsion explosive has the advantages of packaging material saving, carbon dioxide discharge reduction, simple formula, effective reduction of the generation of toxic gases, realization of the discharging amount of relevant toxic gases of about 20L / kg, unblocked conveying, and no influences on the charging and the construction.
Owner:QINGDAO TARGET MINING SERVICES
Preparation method for ticagrelor intermediate
The invention discloses a preparation method for a cagrelor intermediate. The preparation method comprises the following steps; step 1, reacting 2-nitro-1,3-malonic acid diester with sodium sulfocyanate and ammonium acetate in an aqueous solution of acetic acid so as to obtain a compound as shown in a formula II which is described in the specification; step 2, subjecting the compound as shown in the formula II to reflux in ethanol under the action of sodium alkoxide so as to obtain a compound as shown in a formula III which is described in the specification; step 3, subjecting the compound as shown in the formula III and 1-bromopropane to a contact reaction in 1,4-dioxane in the presence of alkali under the catalysis of zinc chloride; and step 4, subjecting a product of the step 3 and a chlorination reagent to a chlorination reaction in acetonitrile so as to obtain the ticagrelor intermediate 4,6-dichloro-5-nitro-2-(propylthio)pyridine. The preparation method provided by the invention has the advantages of few by-products, easy purification and high yield of the ticagrelor intermediate, usage of cheap and easily available raw materials and suitable for industrial production.
Owner:QINGDAO YUNTIAN BIOTECH
Water phase extraction method of erythromycin fermentation broth
ActiveCN109553650AEasy to operateEmission reductionSugar derivativesSugar derivatives preparationAcetic acidSodium sulfocyanate
The invention belongs to the field of medicine preparation, and more specifically relates to a water phase extraction method of an erythromycin fermentation broth. The water phase extraction method comprises following steps: the erythromycin fermentation broth is subjected to ceramic membrane filtration without adding of a flocculating agent so as to obtain a filtrate, the filtrate is subjected toultrafilter membrane ultrafiltration, and an obtained ultrafiltrate is subjected to resin column purification; an obtained column purified liquid is subjected to nanofiltration membrane nanofiltration concentration so as to obtain a concentrate, sodium sulfocyanate and glacial acetic acid are added into the concentrate for precipitation of erythromycin thiocyanate, filtering is carried out so asto obtain a erythromycin thiocyanate wet powder, and drying is carried out so as to obtain a erythromycin thiocyanate dry powder. According to the water phase extraction method, membrane technology and resin purifying technology are adopted to replace conventional frame and plate filtration and solvent extraction purification concentration methods, resin processing amount is large, and erythromycin production cost is reduced obviously. The water phase extraction method is large in subsequent optimization potential, and is capable of improving finished product quality effectively, increasing yield, and improving product competitiveness.
Owner:UNITED LAB INNER MONGOLIA CO LTD
Wash-free mask and manufacturing method thereof
InactiveCN102871865AAvoid harmEasy to useCosmetic preparationsToilet preparationsSodium sulfocyanatePolyvinyl alcohol
The invention relates to a mask, and particularly relates to a wash-free mask and a manufacturing method thereof. The wash-free mask is composed by the following components of ethanol, glycerol, sodium benzoate, sodium sulfocyanate, perfume, polyvinyl alcohol, boric acid and refined water. Compared with a conventional mask, the wash-free mask provides a novel decontamination method. When the wash-free mask is in use, a user only needs to pour out a little of the mask and wipes on the face; the wash-free mask can permeate skins; a thin film can be formed in about 15 seconds; and dirt permeated in the skins can fall off with the film by twisting the face gently with two hands. The wash-free mask is in no need of washing with water or wiping with towel and the like, has no harm to the skins, and is very convenient to use and to carry.
Owner:吕智杰
A method for simultaneous detection of multiple adulterants in milk powder
Owner:SECOND MILITARY MEDICAL UNIV OF THE PEOPLES LIBERATION ARMY
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