399results about How to "Low dissolution rate" patented technology

The invention discloses a method for preparing a manganese series lithium ion sieve adsorbent, and relates to a method for preparing an inorganic adsorbent for adsorbing lithium from liquid lithium resources such as brine of salt lake, seawater and the like. In the method, a cubic crystal ion sieve precursor Li1.6Mn1.6O4 is prepared from Mn2O3 and LiOH or Li2CO3 serving as raw materials by using two sections of solid-phase reactions, wherein the precursor also can be used as an anode material of a lithium ion battery. The precursor is acidized to obtain a lithium ion sieve adsorbent MnO2.0.5H2O (or expressed as H1.6Mn1.6O4), and the ion sieve is the lithium adsorbent which has high selectivity on lithium. The method has the advantages of simple and readily available raw materials, simple process, high adsorption capacity of the ion sieve, low cost, high purity of products and is easy to realize industrial production.

The invention relates to a method for extracting vanadium from vanadium-containing steel slag by using a highly-alkaline sodium hydroxide medium, belonging to the technical field of metallurgy. The technical scheme comprises the following steps: adding steel slag, water and NaOH into a reactor together, wherein the mass concentration of the NaOH solution is 65-90%; decomposing and leaching under atmospheric pressure, and diluting the obtained slurry with a diluter to obtain a slurry mixture; and separating the slurry mixture by filtering at constant temperature, and washing the slag with a washing solution to obtain tailings and a vanadium-containing water solution. The method provided by the invention can be implemented under atmospheric pressure at low temperature (greatly lower than the roasting temperature in the traditional pyrogenic process), and is easy to operate and safe; and the extraction rate of vanadium is greatly higher than that of the existing vanadium recovery technique based on the pyrogenic process and wet process, the one-time recovery rate of vanadium is 85-90%, and the total content of vanadium in the tailings is 0.3-0.6 wt%. The invention solves the problem that vanadium in the vanadium-containing steel slag can not be easily recovered, and has the advantages of high recovery rate of vanadium, low production cost, favorable economic benefit and environmental benefit, and the like.

The invention relates to a bisulfate clopidogrel solid preparation, particles and a preparation method thereof. Particles contained by the solid preparation are solid mixture formed from bisulfate clopidogrel, cellulose excipients and molten adhesive with the melting point between 50 and 86 DEG, and an additionally added excipient of the particles contains weak alkaline lubricants and crosslinked polyvinylpyrrolidone. The solid preparation and the particles thereof are prepared by a melting-granulating method. The solid preparation has the advantages of solving sticking-picking problems existing in the preparation process, effectively reducing the degradation of clopidogrel during storage, reducing the incidence of transforming clopidogrel dextroisomer into clopidogrel levisomer and increasing the stability and security of the solid preparation.

A non-carbon, metal-based slow-consumable anode of a cell for the electrowinning of aluminium self-forms during normal electrolysis an electrochemically-active oxide-based surface layer (20). The rate of formation (35) of the layer (20) is substantially equal to its rate of dissolution (30) at the surface layer/electrolyte interface (25) thereby maintaining its thickness substantially constant, forming a limited barrier controlling the oxidation rate (35). The anode (10) usually comprises an alloy of iron with at least one of nickel, copper, cobalt or zinc which during use forms an oxide surface layer (20) mainly containing ferrite.

The application of the invention provides an environmentally-friendly paper making and pulping technique with high yield, which comprises a raw material preprocessing stage, a physical fibrillation impregnating processing stage, an impregnating, steaming and bleaching three-section integrated pulping stage and a thickening and dewatering processing stage. An environmentally-friendly paper making and pulping system with high yield realizing the pulping technique comprises a stock cutter, a hammering and fibrillation screening dust remover, a washing dust remover, dewatering conveying equipment, a spiral steaming conveyor, a crashing, extruding and impregnating machine, a stirring and impregnating cabin, a pump pipe and a discharge pipe of a high-enriched steaming, bleaching and pulping all-in-one machine, wherein the pump pipe is connected to the high-enriched steaming bleaching pulping all-in-one machine; the discharge pipe of the high-enriched steaming, bleaching and pulping all-in-one machine is connected to a pulp cabin; the pump pipe of the pulp cabin is connected with a thickening and dewatering machine; the thickening and dewatering machine is output to the high-enriched pulping machine; the output of the high-enriched pulping machine is connected with a screening purifier and a thickening and squeezing machine in sequence. In the invention, the problems of high pollution, high energy consumption, serious shortage of paper making raw material and the like in present pulping and paper making industry can be solved fundamentally; rich plant fiber in the nature can be used, and the technical purposes of efficient bleaching, high yield, no black liquor and low energy consumption can be realized.

The invention belongs to the field of environmental protection, and in particular relates to a sludge treatment process. The sludge treatment process comprises the following steps: 1) impurity removal: use multi-stage grille to filter out the garbage in the sludge; 2) pretreatment: utilize the three-stage sludge settling tank to pretreat the sludge to obtain the first, second, and The sludge in the three-stage sludge settling tank, the sludge slurry and the supernatant after being settled in the three-stage sludge settling tank; 3) solidification treatment: respectively adopt mixing solidification and dehydration solidification methods for the first, second, and third-stage sludge sedimentation The silt and silt slurry in the pond are dehydrated and solidified to obtain silt-solidified soils A and B; 4) stacking and aging: transport the silt-solidified soils A and B to a temporary storage yard and age them for 3 to 7 days to complete the treatment. The sludge treatment process of the present invention can simultaneously process particles and sludge with high viscosity and low water content, as well as sludge slurry with fine particles, organic matter and high water content, and is especially suitable for river courses with complex components, wide particle distribution, and large water content differences silt.

The present invention relates to gastroresistant and enterosoluble microparticulate systems for the encapsulation of biologically active substances selected from: flavonoids, vitamins, antioxidants, immunostimulants, starchy and non-starchy polysaccharides, probiotics, prebiotics, intestinal trophism regulators, oligoelements, enzymes and bioactive peptides. Such microparticulate systems allow the administration of the aforementioned nutraceutic substances to animals such as porcines, bovines, caprines, ovines, equids, canids, felines, camelids, lagomorphs, rodents, fowl, and other mammals, including humans, fish and crustaceans, increasing the bioavailability.

Lead-free solder compositions suitable for joining electronic devices to printed wiring boards, which comprises by weight 0.2 to 0.9% copper, 0.006 to 0.07% nickel, 0.03 to 0.08% bismuth, less than 0.5% silver, less than 0.010% phosphorus, and a balance of tin and inevitable impurities. A solder composition embodying this invention finds particular application in automated wave-soldering machines where conventional lead-free solders dissolve excessive copper from printed wiring circuitry and component terminations.

Disclosed is an artificial micro-particle feedstuff for pseudosciaenacrocea larvae, which comprises white fish meal, shrimp powder, mussel powder, calamari powder, yeast powder, hydrolyzed fish meat protein, fish oil, alpha-starch, sodium alginate, mineral salts mixture, vitamins mixture, feeding promoting agent, tomatine, ethoxy quinoline, beta-gluglucosan and soya bean lecithin by the weight ratio of 35-45, 10-20, 10-15, 8-12, 3-6, 5-10, 3-6, 6-12, 1-3, 1-3, 1-3, 0.1-0.2, 0.01-0.05, 0.05-0.08, 0.1-0.3 and 5-8.

Although use of a nitrogen-containing compound as a basic compound component of a resist composition makes it possible to ease the T-top problem at an acid dissociation constant pKa falling within a range of 2 to 6, it is accompanied with the problem that the reaction, that is, acid diffusion upon use of a highly-reactive acid-labile group cannot be controlled. In order to overcome this problem, one or more basic compounds selected from those represented by the following formulas (I) to (III) and (1) to (4) are employed.

A slow-dissolving troche with polyol molecules is disclosed. It may be an adherent troche, preferably adhered to teeth or gums or cheek with acacia gum, or a lollipop or child's pacifier. Consumers are instructed to use the troches at the end of each day and after each meal, at least four times per day to benefit oral health, particularly caries, gingivitis, periodontitis, ear infections, sinus infections, halitosis and risk of Streptococcus mutans infecting their blood from their mouths. The polyol molecules are preferably xylitol. The troches may be made with a bi-layer tablet press rounded on one side and flat on the other, preferably using acacia gum in the flat side layer for adhesion.

The invention relates to a method for producing a potassium fertilizer and aluminum oxide by comprehensively using potassium feldspar. The method comprises the following steps of: (1) smashing potassium feldspar and inorganic chlorate, and burdening potassium feldspar, inorganic chlorate and potassium carbonate in the mass ratio of 1:(1-2):(1-10); (2) pelletizing the prepared material, and sintering at the temperature of 500-1,200 DEG C for 1-5 hours to obtain a sintered material and generate CO2 gas simultaneously; (3) soaking the material obtained in the step (2) into water and filtering; (4) introducing a filtrate obtained in the step (3) into the CO2 gas obtained in the step (2) to obtain an aluminum hydroxide precipitate, and filtering; (5) adding a filtrate obtained in the step (4) into nesquehonite, introducing CO2 gas to obtain a complex salt precipitate, filtering and crystalizing a filtrate to obtain a potassium chloride chemical fertilizer; and (6) adding water for dissolving a complex salt obtained in the step (5) to obtain a solid of nesquehonite, circularly using, heating a potassium bicarbonate solution for decomposing to obtain a potassium carbonate solution for circularly using, and repeating the step (1) to the step (6).

The invention provides a leaching method capable of reducing leached acid consumption of uranium ores, which comprises the following steps: leaching uranium ores by using the mixed solution of sulfuric acid and polyferric sulfate aluminium as the leaching agent, wherein if adopting an agitation leaching mode, the amount of the sulfuric acid in the mixed solution is 6-12% by mass of uranium ores, the amount of the polyferric sulfate aluminium is 0.3-0.7% by mass of uranium ores, and the mass proportion (liquid to solid ratio) of the leaching agent to the uranium ores is (1-2):1; and if adopting a heap leaching mode, the concentration of the sulfuric acid in the mixed solution is 5-10 g/L, and the amount of the polyferric sulfate aluminium is controlled, so that the concentration of Fe<3+> in the mixed solution is 3.0-8.0 g/L, and the concentration of Al<3+> is 0.2-0.8 g/L. On the premise of not affecting the leaching of uranium ores, the polyferric sulfate aluminium selectively inhibits the principal acid-consuming elements and the reaction of sulfuric acid, lowers the leaching rate and reduces the leached acid consumption of ores, thereby lowering the processing cost for uranium ore heap leaching.

The invention provides a metatitanic acid lithium ion sieve and a preparation method of the lithium ion sieve. A molecular formula of the lithium ion sieve is H2RxTi1xO3; R is a magnetic element; x isbetween 0.01 and 0.2; and the lithium ion sieve is formed by doping the magnetic element into an Li2TiO3 lattice, substituting part of titanium positions and removing lithium by pickling. A lithium ion sieve precursor is prepared by calcining a lithium source, a titanium source and a superparamagnetic substance and subjected to pickling and liquid-solid separation to form the magnetic separable metatitanic acid lithium ion sieve. The prepared metatitanic acid lithium ion sieve has the advantages of high adsorption capacity and leaching rate, low solution loss rate, stable structure and the like; the adsorption capacity of the lithium ion sieve is above 50mg/g; the leaching rate is greater than 99%; the solution loss rate is less than 0.1%; and the lithium ion sieve can be repeatedly usedfor many times. After adsorption, the lithium ion sieve can be separated from a lithium containing solution quickly by the action of an externally applied magnetic field, and the separation time is 1-10min.

The invention relates to an aluminum salt adsorbent and application thereof in extraction of lithium in salt lake brine, and belongs to the technical field of extraction of lithium resources. According to the aluminum salt adsorbent and the application thereof, aluminum hydroxide is adopted as the adsorbent, and meanwhile, macroporous resin subjected to modification treatment is adopted as a carrier. The adsorbent is suitable for adsorption separation of the lithium in the salt lake brine, and a catalyst has the advantages of being high in adsorption capacity and low in dissolution loss rate.

The invention relates to an oral administration, in particular to a solid composite containing clopidogrel hydrogen sulfate; the solid composite containing clopidogrel hydrogen sulfate comprises the following ingredients by weight part: 100 parts of clopidogrel hydrogen sulfate and 5-100 parts of mixture of liquid paraffin and talcum powder; the composite can realize industrial production of the clopidogrel hydrogen sulfate and solve the problems that related substances of the tablets rises and the dissolution is reduced.

The invention discloses a vegetable oil composition with hypolipidemic effect and a preparation method thereof. The vegetable oil composition is prepared from the following raw materials in parts by weight: 5-50 parts of jujube seed oil, 10-80 parts of artemisia seed oil, 5-50 parts of perilla seed oil, 10-80 parts of flax seed oil and 5-50 parts of grape seed oil. The vegetable oil composition with hypolipidemic effect provided by the invention is prepared and screened by a large number of experiments and is prepared by adopting natural and traditional medicine and food dual-purpose vegetable oil with multiple healthcare functions, thereby being free of toxic side effect, healthy and safe; as shown in the experimental results, the vegetable oil composition can safely and effectively regulate the blood fat of human body, prevent arteriosclerosis and soften blood vessels, and is capable of being widely used by hyperlipidemia population resulting from high cholesterol or high triglycerides.

A vitreous silica crucible for pulling single-crystal silicon, comprising a surface glass layer having a thickness of 100 μm from an inner surface of the crucible, and a glass layer provided below the surface glass layer in a thickness direction of the crucible and extending to a depth of 1 mm from the inner surface of the crucible. The concentration of OH groups in the surface glass layer is 90 ppm or less, and the concentration of OH groups in the glass layer is equal to or more than 90 ppm and equal to or less than 200 ppm. The bubble content in the glass layer is 0.1% or less.

The invention relates to a method for preparing a tablet drug composition containing Rosuvastatin calcium. The preparation forms of the drug composition can be administered to the patients safely and the stability of Rosuvastatin calcium and the absorbability in gastrointestinal tract can be improved. Specifically, the invention relates to a method for preparing the drug composition containing amorphous Rosuvastatin calcium and beta-cyclodextrin. The method is characterized by grinding Rosuvastatin calcium and beta-cyclodextrin under alkaline condition, drying and crashing to obtain (80-100)-mesh fine powder, mixing the fine powder with appropriate auxiliary materials, preparing granules, carrying out tabletting and carrying out coating, thus preparing the drug composition. The in vitro release of the composition is improved to a greater degree, thus improving the bioavailability; and the composition can effectively treat hyperlipidemia, is convenient to take orally, covers the bad taste and is fast to disintegrate and absorb and convenient to carry.

A wood preservative includes injectable particles comprising one or more sparingly soluble copper salts. The copper-based particles are sufficiently insoluble so as to not be easily removed by leaching but are sufficiently soluble to exhibit toxicity to primary organisms primarily responsible for the decay of the wood. Exemplary particles contain for example copper hydroxide, basic copper carbonate, copper carbonate, basic copper sulfates including particularly tribasic copper sulfate, basic copper nitrates, copper oxychlorides, copper borates, basic copper borates, and mixtures thereof. The particles typically have a size distribution in which at least 50% of particles have a diameter smaller than 0.25 μm, 0.2 μm, or 0.15 μm. At least about 20% and even more than 75% of the weight of the particles may be composed of the substantially crystalline copper salt. Wood or a wood product may be impregnated with copper based particles of the invention.

A method for providing a saccharide based lubricating or protective coating or layer on a substrate surface is provided. In particular, a lubricity and/or protective coating or layer made by said method is provided. Pharmaceutical packages or other vessels coated by said method and the use of such pharmaceutical packages or other vessels protecting a compound or composition contained or received in said vessel with a protective coating against mechanical and/or chemical effects of the surface of the vessel without a protective coating material are also provided.