21results about How to "High phosphorus content" patented technology

The invention relates to the field of solid waste resource utilization, and discloses an ardealite-based saline-alkali soil conditioner as well as a preparation method and an application method.The conditioner is prepared from the following raw materials in parts by weight: 235-330 parts of ardealite, 40-100 parts of sepiolite, 20-70 parts of lignocellulose, 15-30 parts of epoxy chloropropane and 8-20 parts of urea. According to the scheme, through compounding of sepiolite and ardealite, Ca < 2 + > is dissolved out by hydration of the ardealite to replace Na < + > in soil, the sepiolite achieves the effect of fixing Na < + > in the soil through magnesium ion exchange, and hydration of the ardealite is promoted; furthermore, magnesium ions react with water-soluble phosphorus in the ardealite, so that the obstruction of soluble phosphorus on the dissolution of Ca < 2 + > in the hydration of the ardealite is reduced, the hydration of the ardealite is further promoted, and the improvement and treatment effect of the ardealite on the saline-alkali soil is improved.

The invention provides a sludge phosphorus recovery method, which specifically comprises: 1, collecting domestic sewage, sludge and human and animal excreta, completely mixing, and sequentially carrying out enzymolysis, flocculation, disinfection and filtration to obtain sewage and sludge; step 2, after the sewage is concentrated, adding a magnesium source and an alkali source, separating precipitate and supernate, adding an adsorbent into the supernate, and filtering to obtain filtrate and filter residues; 3, sludge is dried and smashed and then mixed with the filtrate and an EM microbial agent for fermentation, and the sludge can be used as a fertilizer or a soil conditioner; the recovery method disclosed by the invention is simple in process, convenient to operate, high in recovery efficiency and stable, does not need expensive equipment, does not need later maintenance cost, does not need to add a large amount of medicaments, can save cost and improve efficiency to the greatest extent, and is suitable for rural areas with relatively weak economic basis.

The invention discloses an application of a low phosphorus stress resistant gene GmLNG5 of a plant. The research on the soybean GmLNG5 gene shows that the GmLNG5 positively regulates the soybean root growth and phosphorus efficiency, is mainly expressed in the soybean root, and enhances the expression under the stress of low phosphorus; the GmLNG5 regulates and controls the growth of the soybean root system by mediating the longitudinal extension of root tip cells, the overexpression of the GmLNG5 gene increases the cell lengths of the extension region and the mature region of the soybean in-vitro hair root tip, the biomass of the in-vitro hair root and the phosphorus content, the plant growth is promoted under low phosphorus stress, and the GmLNG5 gene can be used for cultivating low-phosphorus-resistant plant varieties. The GmLNG5 gene provided by the invention plays an important role in promoting soybean root growth and improving soybean phosphorus efficiency.

The invention relates to the field of electro-catalysis new materials, and provides a biomass-based carbon-supported iron phosphide nano-catalyst and a preparation method and application thereof.According to the technical scheme, waste pomelo peel biomass is fully utilized, the stability and conductivity of a metal phosphide catalyst are improved, phytic acid is used as a phosphorus source for green synthesis of metal phosphide, and the metal phosphide is recycled. The problems of high energy consumption and high pollution in a traditional ammonia synthesis process are solved through an electro-catalysis technology, the technical and use requirements in actual production are met, and a brand-new ammonia synthesis way is provided.

The invention discloses a bacillus preparation, a bacillus compound preparation and application of the bacillus preparation and the bacillus compound preparation in increasing ferrophosphorus in soil, and belongs to the field of plant nutrition and microbiology. The preparation method comprises the following steps: centrifuging a bacterial solution of bacillus 1603IPR-02, and collecting supernate to obtain the siderophore preparation. The siderophore preparation is applied to crop root systems, southern soil or compounded with phosphate tailings to form a bacillus compound preparation to be applied to crops, plant growth can be promoted, plant biomass can be increased, meanwhile, the siderophore preparation has the efficient Fe-P activation capacity, Fe-P insoluble in soil is converted into phosphorus and iron capable of being utilized by plants, and the utilization rate of the Fe-P is increased. The bio-availability of soil nutrients is improved, and the absorption of crops on phosphorus and iron in soil is promoted. When the bacillus preparation or the bacillus compound preparation is used for treating pakchoi, the dry weight, the phosphorus content and the iron content of the pakchoi as well as the quick-acting phosphorus content and the effective iron content of soil can be increased. When applied to crops, the preparation has the characteristics of no pollution, no residue and biological environmental protection.

The invention discloses high-phosphorus and high-sulfur free-cutting steel and a production method thereof. The high-phosphorus and high-sulfur free-cutting steel comprises the following chemical components: 0.51 to 0.56 percent of C, 0.06 to 0.13 percent of Si, 0.80 to 1.0 percent of Mn, 0.041 to 0.065 percent of P, 0.08 to 0.10 percent of S, less than or equal to 0.010 percent of Als, 0.0015 to 0.0030 percent of Ca, 0.16 to 0.22 percent of Mo, 1.90 to 1.98 percent of Cr and 8 to 12 percent of Mn / S. Before converter blowing, high-phosphorus slag and drossing iron are added into a converter, then molten iron is added, phosphorus and sulfur in molten steel at the end point of the converter meet the requirements of a finished product, and the temperature of the molten steel at the end point is 1630-1660 DEG C; the low-alkalinity slag is manufactured through LF refining, the alkalinity is controlled to be 1.0-1.2, and component control and the manganese-sulfur ratio are stable; and the temperature of LF carried-out molten steel is 1530-1540 DEG C. According to the method, ferrous sulfide and ferrophosphorus alloy are not added behind the converter, the sulfur content fluctuation caused by unstable sulfur yield in the refining process is avoided, the manganese-sulfur ratio fluctuation is reduced, cracks are eliminated, the quality of the continuous casting billet is improved, and the production cost is reduced. Meanwhile, the effective utilization of waste resources is realized.

The invention discloses an application of a rice 9-cis-epoxy carotenoid dioxygenase gene OsNCED4 (Oryza sativa 9-cis-epoxy carotenoid dioxygenase The nucleotide sequence of the rice 9-cis-epoxy carotenoid dioxygenase gene OsNCED4 is as shown in SEQ ID NO. 1, and the amino acid sequence of the protein coded by the rice 9-cis-epoxy carotenoid dioxygenase gene OsNCED4 is as shown in SEQ ID NO. 2. Researches find that the overexpressed rice 9-cis-epoxycarotenoid dioxygenase gene OsNCED4 can promote growth of rice under a water-controlled irrigation condition, the phosphorus content of the rice under the water-controlled irrigation condition is increased, and phosphorus absorption of the rice under the water-controlled irrigation condition is improved. The method has great application value.

This invention discloses a polyolefin-containing DCPD epoxy resin and a copper-clad laminate composition thereof, and its preparation method. The method is characterized by: polymerizing polyallyl phenol and catalyst A at high temperature to form polyallyl phenol; then reacting DCPD, polyallyl phenol, and catalyst B at high temperature to form a polyolefin-containing DCPD phenol resin; subsequently, epoxidizing the resin with epichlorohydrin and alkaline catalyst C to synthesize a polyolefin-containing DCPD epoxy resin; finally, mixing the resin with maleimide resin, phosphorus-containing phenolic resin, imidazole accelerator, inorganic filler, and solvent to obtain the polyolefin-containing DCPD epoxy resin composition for copper-clad laminates. The polyolefin-containing DCPD epoxy resin and copper-clad laminate composition prepared by this invention exhibits low dielectric constant, low dielectric loss, and high heat resistance, making it particularly suitable as a raw material for copper-clad laminates and highly practical.

The present application relates to a method for improving the bone integration and antibacterial ability of titanium alloy dental implants, and the specific steps are as follows: Step 1: prepare an electrolyte, the electrolyte includes: phosphate ions, hydroxide ions and EDTA ions, wherein the phosphate concentration is 5-20 mol / L, the hydroxide ion concentration is 5-10 mol / L, and the EDTA ion concentration is 1-3 mol / L; Step 2: immerse the titanium alloy dental implant substrate in the electrolyte prepared in step 1 for thermoelectrochemical oxidation treatment until a crater-shaped porous coating containing phosphorus is formed, and the conditions of the thermoelectrochemical oxidation treatment are: the positive current of the pulse power supply is 8-14A / dm2, the negative current is 6-16A / dm2, the duty cycle is 70%-100%, and the reaction time is 10-20 minutes. The titanium alloy dental implant is subjected to thermoelectrochemical oxidation treatment to form a porous coating. While ensuring the quality of the coating, the phosphorus content is further increased to improve the bone integration ability, and the antibacterial effect is achieved by changing the zeta potential to a higher positive potential, which is an effective measure to inhibit the release of harmful metals.

The invention discloses a petroleum hydrocarbon degradation complex microbial inoculant as well as a preparation method and application thereof, and relates to the technical field of petroleum hydrocarbon degradation, the petroleum hydrocarbon degradation complex microbial inoculant is prepared by taking magnetic phosphorus-containing biochar as an immobilization carrier and loading composite petroleum hydrocarbon degradation bacteria on the surface of the magnetic phosphorus-containing biochar; wherein the magnetic phosphorus-containing biochar is prepared by firstly activating and pyrolyzing biomass shell powder and potassium feldspar powder through phytic acid to obtain phosphorus-containing biochar, and then coprecipitating the phosphorus-containing biochar and ferric salt; the composite petroleum hydrocarbon degrading bacteria are prepared by mixing bacterial suspensions of at least two of the following petroleum hydrocarbon degrading bacteria in an isovolumetric manner: pseudomonas, bacillus, micrococcus, lactobacillus, candida albicans or alcaligenes. The petroleum hydrocarbon degradation composite microbial agent provided by the invention has an excellent degradation effect on petroleum hydrocarbon, can be used in a heavy metal / petroleum hydrocarbon composite polluted soil environment, and has a good application effect.

The application discloses a halogen-free flame-retardant long-chain nylon composite material and a preparation method thereof, and belongs to the technical field of nylon flame retardation, and overcomes the defects that high flame-retardant performance and low smoke density of long-chain nylon resin are difficult to be considered in the prior art.The halogen-free flame-retardant long-chain nylon composite material is prepared from the following raw materials in parts by mass: long-chain nylon resin: 65-92 parts, MCA flame retardant: 5-25 parts, the MCA flame retardant being melamine cyanurate, non-benzene ring phosphorus-containing flame retardant: 1-10 parts, and auxiliary agent: 0-5 parts.The halogen-free flame-retardant long-chain nylon composite material maintains a low smoke density by means of the synergistic effect of the non-benzene ring phosphorus-containing flame retardant and the MCA flame retardant to improve the flame-retardant performance.

The preparation method comprises the following specific steps: firstly, respectively preparing a polyethyleneimine aqueous solution, a tannic acid aqueous solution and a phytic acid aqueous solution by using deionized water, then sequentially immersing the cotton fabric into the polyethyleneimine aqueous solution, the tannic acid aqueous solution, the polyethyleneimine aqueous solution and the phytic acid aqueous solution, finally immersing the cotton fabric into a metal salt solution, and carrying out vacuum drying to obtain the flame-retardant cotton fabric based on biomass. Washing and drying to obtain the flame-retardant cotton fabric. Compared with the prior art, the flame-retardant cotton fabric prepared on the basis of biomass has the advantages that raw materials are easy to obtain, the price is low, the process is simple and convenient, and formaldehyde is avoided, insoluble organic phosphonate is loaded on the surface of the cotton fabric through strong interaction among multiple layers of electrolytes and ion complexing, and the flame retardance and washing resistance of the cotton fabric are effectively improved; sustainable development is facilitated, and the method has important practical significance and wide market prospects.

The invention discloses an epoxy resin composition containing a phosphorus-containing flame-retardant curing agent as well as a preparation method and application of the epoxy resin composition, and belongs to the technical field of preparation of flame-retardant epoxy resin compositions. The epoxy resin composition comprises the following components in parts by weight: 80-100 parts of an epoxy resin matrix, 10-30 parts of a phosphorus-containing flame-retardant curing agent, 6-60 parts of a curing agent, 0.1-0.3 part of an accelerant, 10-30 parts of a synergistic flame retardant, 40-60 parts of filler and the like. The phosphorus-containing flame-retardant curing agent is prepared from phenyl phosphoryl dichloride and a bisphenol compound through a polymerization reaction. The phosphorus-containing flame-retardant curing agent with phenolic hydroxyl reaction active groups is prepared by using low-cost phenylphosphoryl dichloride as a raw material and is matched with an existing flame-retardant system, so that the contradiction between the flame-retardant property and the physical property (mainly Tg) of an epoxy resin material is solved; and the flame retardant grade of V-0 and the higher glass transition temperature can be achieved when the addition amount of the flame retardant is lower.

The invention discloses high-heat-resistance, high-flame-retardancy and low-dielectric benzoxazine resin as shown in a formula (1) and a preparation method thereof, and is characterized in that the preparation method comprises the following steps: adding main chain type benzoxazine resin, DOPO (9, 10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide) and a solvent into a reactor provided with a stirrer, a thermometer and a condenser tube, heating to 80-100 DEG C, and reacting for 30-100 minutes; and adjusting the temperature to 100-120 DEG C, and reacting for 30-100 minutes to obtain the benzoxazine resin with high heat resistance, high flame retardance and low dielectric constant. By adopting the preparation method, the prepared benzoxazine resin with high heat resistance, high flame retardance and low dielectric constant has the characteristics of no halogen, high flame retardance, high heat resistance, relatively good toughness, relatively good dielectric property and the like, is particularly suitable for being used as a raw material for a high-frequency and high-speed copper-clad plate, and can also be used in the fields of laminated boards, integrated circuit packaging, high-density internet and the like. # imgabs0 #

The invention provides a TPU wire rod and a preparation method thereof, and belongs to the technical field of polyurethane. The flame-retardant thermoplastic polyurethane elastomer is prepared from the following raw materials in parts by weight: 3-5 parts of modified graphene oxide, 7-10 parts of flame-retardant ionic liquid, 1-3 parts of a plasticizer, 0.5-1 part of a stabilizer, 0.1-0.3 part of a dispersant and 70-80 parts of a thermoplastic polyurethane elastomer. The TPU wire prepared by the invention has better flame retardance, excellent mechanical properties, high compatibility among various raw materials, lower cost and excellent performance, the preparation method is simple and efficient, and the TPU wire can be used as a flame-retardant TPU wire and has a wide application prospect.

The present invention provides a lightly doped substrate, a substrate with a selective emitter, a solar cell and a preparation method and application thereof. The lightly doped substrate comprises a P-type silicon wafer layer, an N-type silicon layer, a first phosphorus silicon glass layer, an oxide layer and a second phosphorus silicon glass layer which are connected in sequence. In the subsequent heavy doping process, the lightly doped substrate of the present invention can increase the doping uniformity of the doping source on the surface of the silicon wafer on the one hand, and can reduce the square resistance of the heavily doped area on the other hand, thereby reducing the silver silicon contact resistance. The preparation method of the lightly doped substrate is simple, easy to implement and suitable for large-scale industrial production and application. The heavily doped area in the substrate with a selective emitter prepared by the lightly doped substrate has a high phosphorus content, a low and uniform square resistance of the heavily doped area, and a high light conversion efficiency.

The invention discloses a method for increasing apatite phosphorus content in biochar, which comprises the following steps: mixing sludge, biomass, biochar and calcium oxide to prepare a mixed material, biologically drying the mixed material for less than or equal to 12 days, adding magnesium chloride after 25 hours in the biologically drying process, pyrolyzing the obtained biologically dried product to obtain the phosphorite phosphorus content in the biochar. The preparation of the biochar is completed. According to the method disclosed by the invention, under the combined action of calcium oxide and magnesium chloride, a biological drying product with low water content and high apatite phosphorus content can be formed through biological drying treatment; the content of phosphorite phosphorus in the biochar can be remarkably increased under the condition of low pyrolysis energy consumption through simple pyrolysis treatment, the biochar with the high phosphorite phosphorus content is obtained, and the method has the advantages of being simple in process, convenient to operate, low in cost, high in drying efficiency, small in pollution gas emission amount, low in energy consumption, environmentally friendly and the like; and the method has important promotion significance for realizing resource utilization of the sludge-based biochar.

The invention provides a method for preparing natural-color semi-chemical pulp from bamboo reed, and belongs to the field of papermaking. The method makes full use of the advantages of rich fiber content and high yield of the bamboo reed, and fills the vacancy of domestic plant fiber raw materials. The technological method of the bamboo reed natural-color semi-chemical pulp gives full play to the characteristics of high bamboo reed fiber content, low raw material silicon content, low lignin content, easiness in pulping and good water filtration, develops and optimizes cooking, pulping and screening technologies, and is simple in equipment requirement and easy to popularize. The prepared bamboo reed natural-color semi-chemical pulp is excellent in tightness, ring crush resistance and tear strength, and is suitable for oil-proof paper and packaging paper products.

The invention discloses a method for simultaneously realizing innocent treatment and resource utilization of silkworm excrement and cocoon cooking wastewater, which comprises the following steps: mixing silkworm excrement and cocoon cooking wastewater in proportion, carrying out heat preservation treatment, separating to obtain silkworm excrement filter residues and silkworm excrement water extract, mixing silkworm excrement with vegetable garden soil, inoculating chlorella in the water extract, culturing and separating, and then adding the chlorella into the silkworm excrement filter residues and the silkworm excrement water extract to obtain the innocent treatment and resource utilization of the silkworm excrement and cocoon cooking wastewater. The algae cells are used for preparing compound aquatic feed. The method has the advantages of effectively preventing silkworm excrement, cocoon cooking wastewater and other silkworm industry wastes from polluting the environment, converting resource advantages into economic advantages, having important significance for deeply developing a silkworm industry chain and promoting formation of a circular economy mode, and being beneficial to environmental protection. Besides, the silkworm manure fertilizer developed by the invention can obviously promote the growth of vegetables, the developed aquatic feed can obviously improve the growth rate and the survival rate of aquatic animals such as fishes, and the method established by the invention has the characteristics of high conversion efficiency, good product effect, simplicity and convenience in operation and the like, and is easy to realize industrial large-scale production.

The invention discloses a phosphorus-solubilizing fungus soil remediation agent as well as a preparation method and application thereof, and belongs to the technical field of soil remediation. The phosphorus-solubilizing fungus soil remediation agent comprises micro-nano bone black and a penicillium deserticola solid fungicide. The preparation method comprises the following steps: pyrolyzing pig bones, and grinding to obtain the micro-nano bone black; the method comprises the following steps: coating a solid culture medium with penicillium deserticola for culturing to obtain a solid plate, washing the solid plate after spores are mature to obtain a spore liquid, mixing a solid carrier with sterile water, then adding a solid fungicide protective agent, and finally adding the spore liquid to obtain the penicillium deserticola solid fungicide. The phosphorus-solubilizing fungus soil remediation agent provided by the invention not only can effectively promote dissolution of insoluble phosphate, but also can fix heavy metal cadmium (Cd) in soil, has a very good application value for farmland Cd pollution remediation and environmental protection, is green and environment-friendly, can comprehensively improve soil fertility, and creates a good nutritional condition for crop growth.

The invention discloses a halogen-free flame-retardant long-chain nylon composite material and a preparation method thereof, belongs to the technical field of nylon flame retardance, and overcomes the defect that high flame retardance and low smoke density of long-chain nylon resin are difficult to consider at the same time in the prior art. The halogen-free flame-retardant long-chain nylon composite material is prepared from the following raw materials in parts by mass: 65 to 92 parts of long-chain nylon resin and 5 to 25 parts of MCA (melamine cyanurate) flame retardant, 1-10 parts of a benzene-ring-free phosphorus-containing flame retardant, and 0-5 parts of an auxiliary agent. According to the halogen-free flame-retardant long-chain nylon composite material, the benzene-ring-free phosphorus-containing flame retardant and the MCA flame retardant play a synergistic role, so that the flame retardant property is improved, and meanwhile, the halogen-free flame-retardant long-chain nylon composite material keeps relatively low smoke density.