78 results about "Tripotassium phosphate" patented technology

The invention discloses a method for preparing a Ag / Ag3PO4 composite photo-catalyst. The method comprises the following steps of: mixing and stirring pyridine and aqueous solution of AgNO3 uniformly to form a pyridine silver solution; adding phosphate into the pyridine silver solution, mixing uniformly, reacting with stirring to generate Ag3PO4 sediment, and regulating the pH value of the mixed solution by adding phosphoric acid or sodium hydroxide; and heating with sealing, reacting at a controlled temperature, naturally cooling to room temperature after reaction, filtering and washing the product, drying the obtained sediment in a vacuum oven in a shading mode, and thus obtaining the Ag / Ag3PO4 composite photo-catalyst. The phosphate is one of trisodium phosphate, disodium hydrogen phosphate, sodium dihydrogen phosphate, tripotassium phosphate, dipotassium hydrogen phosphate and potassium dihydrogen phosphate; and the purities of the chemical reagents are greater than chemical purities. The method is easy to operate, and facilitates industrialized production; and the prepared Ag / Ag3PO4 composite photo-catalyst is high in quantum efficiency and high in photo-stability.

The invention relates to the technical field of chemical engineering, and particularly relates to a production method for tripotassium phosphate. A tripotassium phosphate product is prepared by directly reacting urea phosphate and potassium hydroxide according to a molar ratio of 1: 2.95-3.05 for 30-60 min at a reaction temperature of 40-80 DEG C, with stirring at a stirring speed of 30 r / min. The tripotassium phosphate product is prepared by directly reacting urea phosphate and potassium hydroxide, so that the whole process has no requirements for high energy consumption; raw materials can be obtained relatively easily; a process route is short and simple; and production cost of tripotassium phosphate is reduced. By adjusting the process route and controlling reaction conditions, the produced tripotassium phosphate completely meets a first level standard of industrial tripotassium phosphate.

The invention discloses a method for preparing a light porous particle controlled release fertilizer. The method comprises the following steps: uniformly mixing CRT screen glass powder, 5-20 percent of monopotassium phosphate, dipotassium phosphate, potassium sulfate, tripotassium phosphate, potassium chloride, zinc dihydrogen phosphate, diammonium hydrogen phosphate, ammonium dihydrogen phosphate, cobalt oxide and manganese oxide, pressing, molding, feeding the mixture into a roller kiln at the temperature of 650-660 DEG C, and preserving the temperature to be 780-790 DEG C for 15-30 minutes; and reducing the temperature to be 50-80 DEG C or below at a rate of 100-200 DEG C per minute, thereby obtaining the light porous particle controlled release fertilizer. The light porous particle controlled release fertilizer prepared by the invention can be widely applied to the fields of indoor horticulture, urban gardening, street planting and farmlands. The preparation process is simple in operating process and low in cost, the production cost of the controlled release fertilizer can be effectively reduced, the environment is protected, wastes are changed into valuable materials, and the light porous particle controlled release fertilizer is suitable for large-scale industrial production and has obvious economic benefits and environmental protection benefits.

The invention discloses a composite plant active beverage capable of treating gout and a manufacturing method thereof. The main material of the beverage is composed of following components in percentage by weight: 5 to 25% of endive, 5 to 25% of root of kudzu vine, 5 to 25% of cape jasmine, 5 to 25% of wolfberry, 5 to 25% of coix seed, 5 to 25% of lily, 5 to 25% of mulberry leaf, and 5 to 25% of licorice root. The auxiliary material is added into a water stock solution and comprises following components in percentage by weight: 2 to 10% of potassium carbonate, 2 to 10% of tripotassium phosphate, 2 to 10% of sea salt, 2 to 10% of sodium hydroxide, 2 to 10% of sodium bicarbonate, 0.5 to 5% of magnesium gluconate, 0.5 to 5% of zinc gluconate, and 0.5 to 5% of ferrous gluconate. Based on the functions of plants and Chinese medicine theories, plant active components are made into a water solution, then the water solution is combined with multiple mineral substances and trace elements to prepare the beverage, the beverage can be diluted before drinking, and the curative effect is very good.

The invention discloses a fertilizer special for navel orange and a preparation method thereof. The fertilizer comprises, by weight, 100-150 parts of silkworm excrement, 70-100 parts of banana stem power or grained segments, 40-60 parts of monosodium glutamate residue, 30-50 parts of urea, 15-25 parts of tripotassium phosphate, 8-12 parts of magnesium sulfate, 6-10 parts of calcium sulfate, 4-8 parts of borax, 3-5 parts of ammonium molybdate, 3-5 parts of cellulase, 4-7 parts of Bacillus subtilis, and 1-2 parts of actinomycetes. The fertilizer has the advantages that fertilizer efficacy is fast and long, stress resistance is high, fertilizer availability is high, nutrients are complete, elements are reasonably matched and the cost is lower; by using the fertilizer, yield of navel orange is greatly increased, sweetness, taste and nutritional value are also greatly improved, and the fertilizer has good economic benefit, social benefit and ecological benefit and is suitable for large-scale popularization.

The invention discloses a reactive dye accelerant. The reactive dye accelerant is characterized by comprising, in parts by weight, 18-22 parts of granular sodium hydroxide, 9-13 parts of trisodium phosphate, 16-18 parts of tripotassium phosphate, 7-9 parts of sodium metasilicate, 40-55 parts of sodium carbonate, 5-10 parts of sodium lignin sulfonate, and 1-3 parts of an ionic liquid. The preparation method comprises the following steps of: pouring raw materials in a stirring kettle according to the proportion, stirring for 5-15 minutes at a speed of 20-40 r / min and in the condition of a temperature of 20-30 DEG C, and then obtaining the reactive dye accelerant. The reactive dye accelerant has the advantages of being capable of promoting the level dyeing of a reactive dye and increasing the colour yield of the reactive dye, thus improving the fastness of a dyed product and reducing the number of cleaning times of the dyed product, and beneficial to reduce the labour intensity of workers, reduce the cost of a dyeing process, and reduce pollution to environment; meanwhile, the reactive dye accelerant is convenient to dissolve, suitable for various reactive dyes and various equipment, and simple in preparation method.

The invention discloses a preparation method for buparvaquone. The method comprises taking tert-butylcyclohexyl acetic acid, sodium omadine and 1,4-naphthoquinone as initial raw materials, firstly reacting tert-butylcyclohexyl acetic acid with sodium omadine to generate tert-butylcyclohexyl acetic acid 2-thioxo-pyridin-1-yl ester, then reacting with 1,4-naphthoquinone for addition, so as to generate 2-[(4-tert-butylcyclohexyl)methyl]-3-(2-pyridinylsulfanyl)-1,4-naphthalenedione, then mixing the obtained 2-[(4-tert-butylcyclohexyl)methyl]-3-(2-pyridinylsulfanyl)-1,4-naphthalenedione, methanol, tripotassium phosphate trihydrate and water, performing heating hydrolysis, processing the solution and acidifying, and filtering to obtain a buparvaquone crude product, and then recrystallizing by utilizing isopropanol, so as to obtain a buparvaquone competitive product. The method is simple in operation, relatively low in cost, high in product yield and relatively suitable for industrialized production.

An alkaline antioxidant mineral water comprises tripotassium phosphate and multiple healthful minerals in water, which is free of chlorine, fluoride, and heavy metals. The alkaline mineral water further includes organic potassium, calcium, zinc, magnesium, selenium and 79 trace minerals from ancient sea salt. The trace minerals are taken from the low-sodium technically-processed magnesium chloride marine deposits and chelated with amino acids. The amino acids are obtained from a non-animal source which is suitable for vegetarian and persons who are allergic to animal proteins. The alkaline antioxidant mineral water neutralizes and eliminates the excess acids in human body, thus improving blood circulation. In addition, it provides electrolytes and minerals, which are beneficial to human body.

The invention provides a degradation method of resin matrix glass fiber reinforced plastic composite materials. The resin matrix glass fiber reinforced plastic composite materials are soaked in benzyl alcohol serving as a solvent under an ordinary pressure, simultaneously tripotassium phosphate is added to serve as a catalyst, then treatment is carried out at a temperature of 190 DEG C for 15-25 hours, and the resin matrix glass fiber reinforced plastic composite materials are degraded into glass fibers and resin. The degradation method of resin matrix glass fiber reinforced plastic composite materials has the following advantages: (1) the used degradation material benzyl alcohol is a food additive, is non-toxic, free of harm, low in cost and wide in source; (2) a degradation process is carried out under the ordinary pressure and has low requirements on equipment; (3) the degradation solvent and the catalyst can be repeatedly used so that the treatment cost is low; and (4) the degradation process cannot damage components in the resin matrix glass fiber reinforced plastic composite materials, such as the glass fibers, can recover the components, and can be used in fields with low strength requirements.

The invention provides organic granular water-soluble fertilizer and a preparation method thereof, and relates to the field of fertilizer. The organic granular water-soluble fertilizer comprises the following components in parts by weight: 65 to 70 percent of ammonium sulfate, 9 to 14 percent of urea, 5 to 10 percent of potassium nitrate, 5 to 6 percent of monoammonium phosphate, 2.5 to 5 percentof potassium fulvic acid, 3 to 4.5 percent of magnesium sulfate, 1.5 to 2 percent of molasses liquid, 0.2 to 1.2 percent of trace element, 0.5 to 5 percent of tripotassium phosphate and 0.5 to 2 percent of ethanediamine sodium dio-phenyl acetate. The organic granular water-soluble fertilizer has rich and balanced nutrition, and can effectively reduce the water-insoluble matter content, rapidly increase the dissolution speed, increase the utilization rate of the fertilizer and avoid blockage of a drop irrigation pipeline.

The invention discloses a preparation technique of an aluminum material with good oxidation resistance, and belongs to the technical field of aluminum alloy material preparation. Raw materials of thealuminum alloy material with good oxidation resistance comprises aluminum, yttrium oxide, praseodymium oxide, copper, iron, cobalt, beryllium, magnesium, titanium, strontium, zinc, chrome, silicon nitride, graphene, tripotassium phosphate, 2-ethyl methacrylate, p-hydroxybenzenesulfonic acid, barium stearate and a 701 power enhancer. The aluminum alloy material with good oxidation resistance is obtained through steps including smelting, refining, casting, press molding and straightening and the like. The aluminum alloy material is high in hardness, oxidation resistance and corrosion resistance.

The invention relates to a phosphorus-doped silicon-based lithium ion battery negative electrode material and a preparation method and application thereof, the phosphorus-doped silicon-based negative electrode material is a powder material, and the powder conductivity is 3.0 S / cm to 6.0 S / cm; the phosphorus-doped silicon-based negative electrode material comprises 90 wt%-99.49 wt% of a silicon-based powder material, 0.01 wt%-3 wt% of a phosphorus-containing doped material doped in the silicon-based powder material, and 0.5 wt%-7 wt% of a soft carbon material, the silicon-based powder material is specifically a powder material containing electrochemical activity and comprises one or more of a nano silicon-carbon composite material, silicon monoxide, modified silicon monoxide, doped silicon monoxide and amorphous silicon alloy; the phosphorus-containing doping material comprises one or more of sodium dihydrogen phosphate, tripotassium phosphate, phosphorus pentoxide, sodium pyrophosphate, potassium pyrophosphate and sodium metaphosphate; and the soft carbon material coats the outer surface of the silicon-based powder material to form a coating carbon layer of the phosphorus-doped silicon-based negative electrode material.

The invention discloses a corrosion-resisting aluminum alloy material, and belongs to the technical field of aluminum alloy material preparing. The corrosion-resisting aluminum alloy material comprises following raw materials of aluminum, yttrium oxide, praseodymium oxide, copper, iron, cobalt, beryllium, magnesium, titanium, strontium, zinc, chromium, silicon nitride, graphene, tripotassium phosphate, 2-ethyl methacrylate, p-hydroxybenzenesulfonic acid, barium stearate and a 701 powder enhancer. The corrosion-resisting aluminum alloy material is prepared through the steps of smelting, refining, casting, die pressing straightening and the like. The corrosion-resisting aluminum alloy material is high in hardness, and the oxidization resisting performance and the corrosion resisting performance are high.

The invention discloses facial mask liquor containing gold nano negative ion collagen, a facial mask and a preparation method of the facial mask liquor containing the gold nano negative ion collagen.The facial mask liquor is prepared from the following raw materials in percentage by weight: 0.1-2% of nano gold, 1-10% of collagen, 5-8% of butanediol, 3-6% of glycerine, 2-5% of sodium hyaluronate,2-5% of polydimethylsiloxane, 1-3% of nicotinamide, 2-5% of vitamin E, 1-4% of ubiquinone, 0.2-2.5% of tripotassium phosphate, 1-4% of essence and the balance of water. While the facial mask disclosedby the invention is attached on a skin surface layer, effective components with functions of moisturizing, whitening,anti-aging and the like in skincare products are also fed to the skin bottom layer, and are very good in affinity with surrounding tissues, so that the skin can be sufficiently moisturized; stains can be faded deeper; a dark and yellow phenomenon of the skin is alleviated; the skinis fair-complexioned, tender, and moisturized from inside to outside; skin cell activity can be quickly improved within only 30 minutes; andthe facial skin is whitened, moisturized, nourished and recovered, and therefore, the facial skin is refreshing, is smooth and tender, is fair-complexioned and compact, and is attractive.

The invention discloses DNA (deoxyribonucleic acid) preservation solution for oral swabs. The DNA preservation solution comprises, by weight-to-volume ratio, trihydroxymethyl aminomethane, sodium alginate, tripotassium phosphate, zinc gluconate, ethylene diamine tetraacetic acid disodium, L-carnitine, valine, natural preservatives, vitamin e, normal saline, stevioside, sodium polystyrene sulfonateand sodium dihydrogen phosphate. Deionized water is used as a solvent for the DNA preservation solution. The DNA preservation solution has the advantages that the DNA preservation solution is preservation solution pertinently for the oral swabs, and oral cells can be effectively preserved by the DNA preservation solution; the DNA preservation solution is hygienic, and bacterium breeding can be prevented; the preservation time is longer than 3-5 times the preservation time of envelopes; a method for preparing the DNA preservation solution is simple and has a good social value.

The invention provides a bionic mineralized repairing desensitizer and a using method thereof. The bionic mineralized repairing desensitizer is characterized by comprising 1-100000 ppm dendritic macromolecule, 1%-50% of bioactive glass, 0.1%-20% of tripotassium phosphate, 1%-5% of glycerinum, 30%-70% of polyethylene glycol, 0.5%-8% of xanthan gum, 1%-10% of titanium dioxide, 0.1%-1% of essence, 0.1%-2% of sodium saccharin, 0.1%-1% of ethylparaben, and 1%-8% of lauryl sulfate. The dendritic macromolecule comprises hydroxyl-terminated, carboxyl-terminated, phosphate radical-terminated or amino-terminated 0-5-generation polyamide-amine dendritic macromolecules; and the bioactive glass comprises (CaO)x(NaO2)y(SiO2)z(P2O5)1-x-y-z, wherein x is equal to 0.25-0.45, y is equal to 0-1, and z is equal to 0.34-0.64. The invention further provides a using method of the bionic mineralized repairing desensitizer. The bionic mineralized repairing desensitizer is scraped into a medical device capableof being matched with teeth to be uniformly distributed, and is bitten in a mouth for 1 min and longer, and the medical device comprises a foam denture, a thermoplastic denture and a teeth whitening strip and the like which are seen in the market; and the fact shows that the bionic mineralized repairing desensitizer can close exposed dentin deeply for a long time, so that long-acting desensitization is realized, and the dentin hypersensitivity is relieved.

The invention discloses a controllable preparation method of a silver phosphate nanocrystal photocatalytic material. The controllable preparation method comprises the following steps of: adding sodium phytate into silver nitrate solution, heating the solution till boiling, keeping for a certain period and then cooling to room temperature to obtain the phytic acid micelle solution containing silver ions; and adding phosphate into the obtained phytic acid micelle solution, fully agitating to form silver phosphate yellow colloid solution, statically placing for continuous reaction for a certain period, conducting centrifugal separation, washing for 3-4 times with deionized water and finally drying in a vacuum drying oven to obtain silver phosphate nanocrystals. The sodium phytate is brought or self-made; the phosphate is one of trisodium phosphate, disodium hydrogen phosphate, sodium dihydrogen phosphate, tripotassium phosphate, dipotassium phosphate and monopotassium phosphate; and the purity of chemical reagent is above chemical purity. A range of grain size of the prepared silver phosphate nanocrystals is 40-100nm. Since the phytic acid which is extracted from plants is used as a soft template, the controllable preparation method is environmental-friendly and simple and facilitates industrialized production.

A highly alkaline, ultra-low sodium antioxidant mineral additive of saturated tripotassium phosphate may be used as an additive to dosages such as concentrated drops, tablets, capsules, bottled water, beverages or other dosage forms. The alkaline antioxidant mineral additive further includes organic potassium, calcium, zinc, magnesium, selenium and 79 trace minerals from ancient sea salt. The trace minerals are taken from the low-sodium technically-processed magnesium chloride marine deposits and chelated with amino acids. The amino acids are from a non-animal source which is suitable for vegetarian and persons who are allergic to animal proteins. The alkaline antioxidant mineral additive, which is considered nutritionally nil in sodium content, can be used as a concentrated aqueous drop or dried and used as an additive for dietary supplement dosage forms including tablets, capsules, bottled water, beverages and others.

The invention discloses an electrolytic method for preparing potassium dihydrogen phosphate, and is characterized in that a saturated or nearly saturated potassium chloride solution and a dipotassium hydrogen phosphate solution with a concentration of 1-8 mol / L, or a mixed solution of potassium dihydrogen phosphate and dipotassium hydrogen phosphate, or a mixed solution of dipotassium hydrogen phosphate and tripotassium phosphate, or a mixed solution of tripotassium phosphate and potassium hydroxide, are added into an electrolytic tank; under the conditions of a reaction temperature being 40-100 DEG C and an electrolyzing voltage being 2.1-5 V, continuous electrolysis is carried out to obtain a cathode complete solution; through concentration separation, a solid (or a heavy paste) is recycled into the electrolysis system; after a clear solution neutralizes a phosphoric acid, evaporation concentration, cooling crystallization, filtering, and drying are carried out to obtain a product potassium dihydrogen phosphate; a mother solution is neutralized by a catholyte after the electrolysis, and then returns to the electrolytic tank to undergo electrolysis; and at the same time, a chlorine gas and a hydrogen gas are by-products. The method of the invention overcomes the deficiencies of a high reaction temperature, high corrosion of equipment, high environmental pollution of the extraction method, a high material cost, and the like in the traditional complex decomposition method.

The invention provides a water-soluble fertilizer having effects for dredging pipeline and resisting obstruction used for a drip irrigation system, which belongs to the field of an agricultural fertilizer. The water-soluble fertilizer comprises the following components: 2-7 parts of a chelating agent, 3-8 parts of a pH conditioning agent, 50-95 parts of a scale inhibitor, and 1-1.5 parts of a sanitizing agent; wherein, the scale inhibitor is one or more of potassium pyrophosphate, tripotassium phosphate, ATMP, HEDP sodium salt or PBTCA.Na4; while fertilizing, the water-soluble fertilizer has the effects for dredging pipeline and resisting scales.

The invention belongs to the preparation method of ammonium salt lead storage battery electrolyte. The preparation method comprises the following steps: stirring mother liquor under room temperature, and adding EDTA, an anti-ageing agent, 2-mercapto benzimidazole diallyl sulfide, an antioxidant, 2,6-butylated hydroxytoluene, tripotassium phosphate and sodium salt in sequence to prepare a mixed liquor; stirring the mixed liquor until the temperature reaches 40DEG C, and leaving to stand for 30-40 minutes; adding a buffer solution into the mixed liquor for stirring for 10-15 minutes, and leaving to stand for 20-25 minutes; adding pure water into the mixed liquor to dilute until the solution density reaches 1.1-1.3g / cm<3>, stirring for 30 minutes, and leaving to stand for 12 hours to obtain a semi-finished product; feeding the semi-finished product into crystallization equipment to obtain ammonium salt; adding pure water into the ammonium salt to dilute the ammonium salt. The preparation method has the advantages of being simple and reasonable in technological process, effectively improving the cleaning and production level of enterprises, effectively improving the safety performance of lead storage batteries and prolonging the service life of the lead storage batteries.

The invention discloses a heavy metal stabilizer for treating waste incineration fly ash and a using method of the heavy metal stabilizer. The heavy metal stabilizer comprises the following components: 10 to 20 parts of a phosphate; 5 to 10 parts of a silicate; 5-10 parts of an inorganic alkaline substance, 5-8 parts of an adsorbent, 5-10 parts of a stabilizer, 1 to 2 parts of an activating agent;1 to 5 parts of cellulose; 10-20 parts of a curing agent and 20-30 parts of a metal chelating agent; the phosphate is one or more of a calcium magnesium phosphate fertilizer, tripotassium phosphate,monopotassium phosphate and dipotassium phosphate. The beneficial effects of the heavy metal stabilizer are that: according to the heavy metal stabilizer for treating the waste incineration fly ash and the using method of the heavy metal stabilizer, the stabilizer formed by mixing the phosphate, the inorganic alkaline substance, the adsorbent, the stabilizer, the activating agent and the like arefully contacted with the incineration fly ash, so that certain treatment effect on fly ash is achieved; the method has the advantages of no secondary pollution, no nuisance, simple use method and lowcost, conforms to the energy-saving and carbon-reducing benefits and economic benefits, and has favorable application prospects.

The invention relates to a compound nutrient conditioner for roots of plants, which includes a liquid A, a liquid B, a liquid C and water according to the mass ratio of 23:18:7:130, wherein the liquid A includes calcium nitrate, ferric chloride, amino acid chelated magnesium and water; the liquid B includes boric acid, ferrous sulfate, tripotassium phosphate, manganese sulfate, copper sulfate, zinc sulfate, ammonium dihydrogen phosphate, ammonium molybdate and water; the liquid C includes gibberellins, 6-furfurylaminopurine, [alpha]-naphthylacetic acid and water. The compound nutrient conditioner contains abundant nutrients, various microelement and growth hormones, is beneficial to scientific fertilization and achieves high quality and high yield.

A highly alkaline, ultra-low sodium solution of saturated tripotassium phosphate may be used as an additive to dosages such as concentrated drops, tablets, capsules, bottled water, beverages or other dosage forms. The additive further includes organic potassium, calcium, zinc, magnesium, selenium and 79 trace minerals from ancient sea salt. The trace minerals are taken from the low-sodium technical magnesium chloride marine deposits and chelated with amino acids. The amino acids are from a non-animal source which is suitable for vegetarian and persons who are allergic to animal proteins. The additive, which is considered nutritionally nil in sodium content, can be used as a concentrated aqueous drop or dried and used as an additive for dietary supplement dosage forms including tablets, capsules, bottled water, beverages and others.

The invention discloses an aluminum alloy material used for mechanical and electrical products. The aluminum alloy material includes following raw materials including, by weight, 285 parts of aluminum, 10 parts of yttrium oxide, 4 parts of praseodymium oxide, 5 parts of copper, 6 parts of iron, 14 parts of cobalt, 3 parts of beryllium, 12 parts of magnesium, 8 parts of titanium, 6 parts of strontium, 16 parts of zinc, 5 parts of chromium, 18 parts of silicon nitride, 1.5 parts of graphene, 5 parts of tripotassium phosphate, 1.8 parts of 2-ethyl methacrylate, 4.2 parts of phenol-4-sulfonic acid, 3 parts of barium stearate and 2.6 parts of a 701 powder reinforcing agent. The aluminum alloy material used for the mechanical and electrical products is prepared through the steps of smelting, refining, casting, press mould straightening and the like. The aluminum alloy material used for the mechanical and electrical products is high in hardness, high in oxidation resistance and corrosion resistance and capable of being widely applied to the mechanical and electrical products.

The invention discloses a preparation method of a water treatment composite. The water treatment composite is prepared from, by weight, 33-37 parts of a nanotube-nano-silver-polyaluminium chloride material, 15-20 parts of polymeric flocculant, 5-12 parts of tripotassium phosphate and 6-11 parts of magnesium sulfate. The preparation method has the technical advantages that the removal effect on organic pollutants is good, the preparation method is simple, and the preparation process is easy to control; the water treatment composite is free of toxin and pollution and can be naturally decomposed in water, and secondary biochemical pollution is greatly lowered; TDS, the electrical conductivity and COD of wastewater can be obviously lowered, and the times of recycling of papermaking wastewater are greatly increased.

The invention belongs to the technical field of preparation of nano materials and relates to a fiber division method of silk fibroin fibers, aiming at solving the problems that a fiber division effect on the silk fibroin fibers is not good when only ultrasonic waves are used so that the yield of the silk fibroin nano fibers keeps a relatively low level all the time. The fiber division method of the silk fibroin fibers comprises the following steps: adding the silk fibroin fibers into a soaking solution and soaking to obtain soaked fibers; carrying out fiber division on the soaked fibers in a treatment solution by using the ultrasonic waves to obtain a rough product; and finally, removing the treatment solution in the rough product to obtain the silk fibroin nano fibers, wherein the soaking solution is a water solution of sodium carbonate and alkali metal phosphate, the treatment solution is the soaking solution or water, the alkali metal phosphate is trisodium phosphate or tripotassium phosphate, and the concentration of the sodium carbonate and the alkali metal phosphate is 0.05%-5%. With the adoption of the technical scheme, the technical problems above can be effectively solved.

The invention discloses a method for removing harmful gas and heavy metal in carbon black tail gas. A catalyst is good in internal recycling effect, and long in service life. The method comprises the steps of: firstly, mixing deadwood, fallen leaves and yeast wastewater according to the ratio, and laying aside for 5-120 hours; taking out the deadwood and fallen leaves in the mixture when the CO2 content released in the mixture is lower than 120-180mg / kg.h; extruding and pelletizing by a squeezing granulator, forming (2-3mm)*(3-5mm) of particulate matters; drying the particulate matters in a microwave dryer and removing 60-80% of moisture; putting into a heat-tube GGH (gas-gas heater) packing chamber, stewing for 3-10 hours to activate in nitrogen of 200-350 DEG C; adding one or more of monopotassium phosphate KH2PO4, dipotassium phosphate K2HPO4, tripotassium phosphate K3PO4 or potassium pyrophosphate K4P2O7 to yeast wastewater, preparing modified yeast water; feeding the improved yeast water into the heat-tube GGH packing chamber at the flow speed of 0.2-0.6m / s from top to bottom, and removing the harmful gas and heavy metal in the carbon black tail gas by the cross action with high-temperature carbon black tail gas at 101-350 DEG C from bottom to top.

An oral care composition is disclosed comprising from 0.01 to 50% by weight of a calcium source, a water soluble phosphate source, a water soluble silicate source and from 0.01 5 to 10% by weight of an amino acid or its physiologically acceptable salt or a mixture thereof, wherein the calcium source is calcium hydroxide, calcium oxide, calcium glycerophosphate, calcium lactate, calcium sulfate, calcium salts of citric acid, calcium chloride, calcium nitrate, calcium acetate, calcium gluconate, calcium formate, calcium malate, calcium propionate, calcium butyrate, calcium bicarbonate, monocalcium phosphate anhydrous, dicalcium phosphate anhydrous, tricalcium phosphate, octacalcium phosphate, calcium silicate, calcium carboxymethyl cellulose, calcium alginate, calcium carbonate or mixtures thereof; wherein the phosphate source is trisodium phosphate, monosodium dihydrogen phosphate, disodium hydrogen phosphate, ammonium phosphate, diammonium hydrogen phosphate, ammonium dihydrogen phosphate, tripotassium phosphate, monopotassium dihydrogen phosphate, dipotassium hydrogen phosphate or a mixture thereof; wherein the silicate source is sodium silicate, potassium silicate, tetraethylorthosilicate, tetraethylsilicate or mixtures thereof; and wherein the amino acid is selected from acidic amino acid, neutral amino acid or a mixture thereof.