89 results about "Potassium phosphate" patented technology

The invention relates to the technical field of organic synthesis, in particular to 4-chloro-1-methyl-6H-heterochromene [3, 4-c] pyridine as well as a synthesis method and application of the 4-chloro-1-methyl-6H-heterochromene [3, 4-c] pyridine. The synthesis method comprises the following steps: (1) synthesizing 2-chloro-3-fluoro-4-iodine-5-methylpyridine from 2-chloro-3-fluoro-5-methylpyridine and an iodine elementary substance to obtain 2-chloro-3-fluoro-4-iodine-5-methylpyridine; (2) synthesizing 2-(2-chloro-3-fluoro-5-methylpyridine-4-yl) benzaldehyde from the 2-chloro-3-fluoro-4-iodo-5-methylpyridine, the 1, 1-bis (diphenylphosphine) ferrocene palladium dichloride, the tripotassium phosphate and the (2-formyl phenyl) boric acid, and further synthesizing the 2-(2-chloro-3-fluoro-5-methylpyridine-4-yl) benzaldehyde from the 2-chloro-3-fluoro-4-iodo-5-methylpyridine and the 1, 1-bis (diphenylphosphine) ferrocene palladium dichloride. And (3) synthesizing the 4-chloro-1-methyl-6H-heterochromene [3, 4-c] pyridine by using the 2-(2-chloro-3-fluoro-5-methylpyridine-4-yl) benzaldehyde and sodium tert-butoxide. The 4-chloro-1-methyl-6H-heterochromene [3, 4-c] pyridine compound constructed by the invention can be used for detecting the content of pesticide residue glyphosate.

Provided is an aqueous inorganic coating agent capable of forming a coating film having high antifogging properties. [Solution] The aqueous inorganic coating agent comprises small-particle colloidal silica having an average particle diameter of 3 nm or more and 10 nm or less, large-particle colloidal silica having an average particle diameter of more than 10 nm and 100 nm or less, at least one of a sodium phosphate compound and a potassium phosphate compound, boric acid, and water.

Provided is a water-based inorganic coating agent capable of forming a coating film having high antifouling properties and excellent abrasion resistance. The aqueous inorganic coating agent includes colloidal silica, at least one of a sodium phosphate compound and a potassium phosphate compound, boric acid, aluminum monophosphate, and water.

The present invention relates to a method for producing liquid NPK fertilizer, characterized in that the reactants K2CO3 or KHCO3, NH4HCO3, and H3PO4 are reacted in an aqueous solution to produce potassium and ammonium phosphate salts, particularly K3PO4 and (NH4)3PO4; the reaction is carried out in multiple steps and includes at least one exothermic reaction and at least one endothermic reaction; and the temperature of the reaction is controlled by adjusting the amount and rate of addition of each reactant in the various steps so as to maintain the reaction mixture within a desired temperature range, preferably between 5°C and 50°C, throughout the reaction, without the need for external cooling or heating devices to control the temperature of the reaction. In a more specific embodiment, the method according to the invention is characterized in that at least one exothermic reaction comprises the reaction of K2CO3 with HO to produce KHCO3 and KOH and / or the reaction of KHCO3 with H3PO4 to produce K3PO4, CO2, and HO, and at least one endothermic reaction comprises the reaction of NH4HCO3 with H3PO4 to produce (NH4)3PO4, CO2, and HO.

The application belongs to the field of chemical analysis, and particularly relates to a method for detecting LNT II synthesized by an enzyme catalysis process, comprising the following process: in the process of synthesizing an intermediate and / or end product of LNT II by an enzyme catalysis process, the reaction solution after inactivation and protein removal is detected by HPLC-UV-RI, and the detection result is quantitatively analyzed; the chromatographic condition of the HPLC-UV-RI detection is as follows: a HILIC column of a polymer matrix, a column temperature of 50-60 DEG C, a mobile phase A of acetonitrile, a mobile phase B of a potassium phosphate dibasic aqueous solution, a concentration of the potassium phosphate dibasic aqueous solution of 40-60 mmol / L, a pH value of 6.5-7.5, and a volume ratio of the mobile phase A to the mobile phase B of (65-75):(35-25). The method provided by the application can effectively separate and accurately quantify the substrate, intermediate, end product and the like in the reaction solution in the process of synthesizing LNT II by an enzyme catalysis process.

The present invention relates to a liquid composition characterized in that it comprises: a live attenuated herpes simplex virus 1 (HSV-1); 17.5 mg / mL to 22.5 mg / mL of recombinant human serum albumin (rHSA); less than 5 mg / mL of sucrose; 26 mg / mL to 32 mg / mL of sorbitol; 13.5 mg / mL to 16 mg / mL of potassium phosphate and 3 mg / mL to 7 mg / mL of sodium chloride, wherein the liquid composition comprises no more than 0.01 mM of any of lactose, gelatin, antibiotic and free amino acids.

The invention discloses a microbial composition for preventing and treating vomitoxin as well as a preparation method and application of the microbial composition. The microbial composition for preventing and treating vomitoxin is mainly prepared by mixing a component I and a component II according to a mass ratio of (50.0-0.1): (50.0-99.9), the component I comprises trichoderma harzianum powder, trichoderma asperellum powder and penicillium bayi powder; and the component II comprises potassium phosphite, alkene potassium phosphate and potassium tripolyphosphate. The preparation method comprises the following steps: adding the component I and the component II into a stirrer, and stirring and mixing to obtain the coating. The invention also discloses an application of the microbial composition for preventing and treating vomitoxin. The microbial composition disclosed by the invention can generate metabolites with a biocontrol effect, has efficient inhibitory activity on fusarium, can reduce generation of vomitoxin, can effectively regulate diversity of soil microorganisms, realizes crop yield increase and soil improvement, and is green and environment-friendly. The method and application are simple, the cost is low, and the method is suitable for agricultural application.

The invention belongs to the technical field of biological medicines, and particularly relates to a dissociation liquid applied to an aluminum adjuvant adsorption influenza vaccine and a method for measuring the antigen content. The dissociation liquid disclosed by the invention is prepared from a potassium phosphate salt solution, diethanol amine, TritonX-100, tween-20, dodecyl dimethyl betaine and water. The dissociation liquid is excellent in dissociation efficiency, the dissociation recovery rate of the dissociation liquid to H1N1, H3N2 and BV type influenza vaccine hemagglutinin reaches 106%-110%, the antigen activity can be effectively protected, operation is easy and convenient, adaptability is wide, a dissociated sample can be directly used for mainstream detection methods such as a one-way immunodiffusion test, an enzyme-linked immunosorbent assay and a high performance liquid chromatography method, and the dissociation liquid has good application prospects. The precise quantification of the antigen content in the aluminum adjuvant adsorption influenza vaccine is realized, and a reliable technical support is provided for vaccine quality control.

The application discloses a production process of electroplating grade potassium pyrophosphate, which uses potassium carbonate and diaphosphorus pentoxide as raw materials, and adds a catalyst to react in a high-pressure reaction kettle. After the reaction is completed, water is added for dissolution, and the pH value of the slurry is controlled to be 9.0-10.0. After being filtered through a precision filter, the slurry is punched into a slurry storage tank, and the slurry storage tank is maintained at 75-95 DEG C. The slurry in the storage tank is punched into an evaporation and concentration device for concentration, and then the concentrated liquid is punched into a continuous crystallization device for continuous crystallization operation. After centrifugal treatment, the filtrate is recycled into the evaporation and concentration device. The potassium pyrophosphate crystals are subjected to vacuum drying treatment in a vacuum drying equipment, and then are packaged into finished products after being crushed and sieved. The potassium pyrophosphate crystals obtained by the application have high purity, less caking phenomenon, and stable and controllable product quality.

The invention belongs to the technical field of remediation of polluted soil by a chemical method, and particularly relates to a heavy metal soil remediation agent based on a pyrolysis carbonization product and a method for preparing the heavy metal soil remediation agent from the pyrolysis carbonization product. The preparation method of the heavy metal soil remediation agent comprises the following steps: soaking with a pore-forming agent, preparing biochar, compounding silicon oxide, sulfhydrylating biochar and compounding potassium phosphate. The soil remediation agent capable of effectively reducing the concentration of the heavy metals in the soil is obtained by carrying out structure regulation and control and sulfydryl modification on the biochar, and the reduction rate of effective-state cadmium and arsenic in the soil can reach 80% or above.

The application discloses a kind of fulvic acid hydrogen peptide biological stimulant hormone fertilizer and preparation method thereof, belong to fertilizer technical field.Fertilizer is by 15~30 parts of fulvic acid, 5~12 parts of peony seed meal small molecule peptide, 20~35 parts of potassium dihydrogen phosphate and other components compound, water is made up to 100 parts, and auxiliary agent is emulsifier and chelating agent compound.Preparation first by dissolving fulvic acid, potassium phosphate in water and obtaining mixed solution, then adding small molecule peptide and auxiliary agent and stirring until the system is stable;Small molecule peptide is prepared by peony seed meal defatted powder crushing and enzymolysis, solves the problem of traditional fertilizer nutrient antagonism, unstable system, and the utilization of peony seed meal also improves resource utilization.Tomato, cucumber seedling test shows that it can significantly improve the growth index of crop root system and aboveground part, and the root-promoting and seedling-strengthening effect is better than that of similar fertilizer on the market, and the preparation process is simple, easy to industrialization, and has good agricultural application prospect.

The present invention provides an aqueous inorganic coating agent capable of forming a highly stain-resistant film on various substrates. [Solution] An aqueous inorganic coating agent comprising colloidal silica, at least one of a sodium phosphate compound and a potassium phosphate compound, boric acid, an inorganic thickener, and water.

The application discloses a kind of polyphosphate potassium short chain polymerization degree synthesis control system and method, belong to polyphosphate potassium synthesis technical field, including the following steps: obtaining real-time synthesis state;Based on real-time synthesis state, polymerization degree prediction is carried out through prediction model;Based on predicted polymerization degree, first polymerization degree threshold value, second polymerization degree threshold value determine control decision;In response to adjustment control, optimal control sequence is solved based on objective function and constraint condition;The first step control amount in optimal control sequence is executed;Risk score decision is carried out based on the synthesis state after first step control amount execution;In response to model update decision, update prediction model parameter;In response to safety protection decision, execute safety protocol.The application has realized the technical effects of multivariable collaborative decoupling control, model adaptive updating and rectification and reducing the rate of safety accident.

The application discloses a potassium dihydrogen phosphate solution cooling crystallization device and a use method thereof, and belongs to the technical field of crystallization devices. The device comprises a cooling cavity, a cooling pipe arranged at the central bottom of the cooling cavity, two turning plates, a push rod, a power source and two connecting rods. The two turning plates are respectively arranged at the two sides of the cooling pipe and are hingedly connected with the inner bottom of the cooling cavity. The two sides of the two turning plates are sealingly matched with the inner side wall of the cooling cavity. The one end of the connecting rod is connected with the other end of the turning plate. The power source is fixedly connected with the outer wall of the cooling cavity and is drivingly connected with the other end of the push rod. The two connecting rods are symmetrically fixedly connected with the inner top of the cooling cavity. The triangular cooling cavity is hingedly connected with the free end of the connecting rod, so that the longest side of the triangular cooling cavity is adjacent to the turning plate. The feeding port is arranged in the central top region of the cooling cavity. The application has the beneficial effects of improving the cooling effect, shortening the cooling time and improving the quality of the generated potassium dihydrogen phosphate crystal.

This invention provides an aqueous inorganic coating agent that has high stain resistance and can form a film with suppressed interference fringes, and a coating method using this aqueous inorganic coating agent. [Solution] An aqueous inorganic coating agent comprising a potassium silicate compound, colloidal silica, a sodium phosphate compound, boric acid, and water, wherein the content of the potassium phosphate compound is less than 0.10% by mass of the solid content of the aqueous inorganic coating agent.

The invention relates to a process for recovering an electrolyte and co-producing potassium hexafluorophosphate, which comprises the following steps: 1) taking the electrolyte, adding potassium fluoride and potassium carbonate solid, stirring for 0.5-1.5 hours at room temperature, and then stirring for 4-6 hours at 40-50 DEG C; 2) after stirring is finished, carrying out solid-liquid separation, and recovering the solvent from the obtained filtrate in a rectification manner; 3) performing solid-liquid separation to obtain a solid, adding acetonitrile, and stirring at 20-25 DEG C for 30-60 minutes; 4) after stirring, filtering and washing to obtain a lithium fluoride solid; and carrying out rotary evaporation on the obtained filtrate at 60-70 DEG C to obtain a crude potassium hexafluorophosphate solid. According to the process, a step-by-step extraction and hydrolysis process route is adopted, operation is easy, industrial production is easy to achieve, energy consumption and cost are reduced, and the potassium hexafluorophosphate solid is produced while the electrolyte is recycled; and guidance is provided for electrolyte recovery and potassium hexafluorophosphate synthesis in the future.

The contact lens treatment solution comprises: (a) one or more potassium salts selected from the group consisting of potassium chloride, potassium citrate, potassium hydroxide, potassium borate, potassium ethylenediaminetetraacetate, and potassium phosphate; (b) an antimicrobial agent comprising alexidine or a salt or free base thereof; and (c) optionally, one or more sodium salts selected from the group consisting of sodium chloride, sodium citrate, sodium hydroxide, sodium phosphate, sodium ethylenediaminetetraacetate, and sodium borate, wherein, when one or more sodium salts are present, the one or more potassium salts are present in an amount greater than the amount of the one or more sodium salts.

The invention discloses a method for constructing indolone compounds based on free radical mediated 1, 4-cyano migration, desulfurization and cyclization, and the method comprises the following steps: mixing 2-cyano-N, 2-dimethyl-N-(phenylsulfonyl) hex-5-enamide compounds, bromo-ester compounds, a photocatalyst and potassium phosphate in an organic solvent under a protective atmosphere, and carrying out a reaction under a protective atmosphere to obtain the indolone compounds. And carrying out 1, 4-cyano migration, desulfurization and cyclization reaction under an illumination condition to obtain the indolone compound. According to the present invention, based on the visible light catalysis non-activated olefin cyclization strategy, the carbon-sulfur bond breakage and the carbon-carbon bond formation are successfully achieved through the one-pot method, and the 1, 4-cyano group migration, desulfurization and cyclization are successfully synthesized to construct the indolone compound; the preparation method has the characteristics of mild conditions, stable and easily available raw materials, good compatibility with various functional groups and the like, and has practical application value.

The invention belongs to the technical field of lithium battery fire extinguishing materials, and particularly relates to an inorganic fullerene type sulfide-containing potassium-based fire extinguishing agent for lithium battery fire disasters, which comprises the following components: inorganic fullerene type sulfide, a mixture of polysiloxane and polyimide, a mixture of potassium carbonate and potassium phosphate, and alumina nanoparticles, a polyethylene glycol dispersant; wherein the inorganic fullerene type sulfide is inorganic fullerene type tungsten disulfide IF-WS2 or inorganic fullerene type molybdenum disulfide IF-MoS2 or a mixture of the inorganic fullerene type tungsten disulfide IF-WS2 and the inorganic fullerene type molybdenum disulfide IF-MoS2. The inorganic fullerene type IF-WS2 and / or IF-MoS2 are / is introduced into the fire extinguishing agent, and the combination technology of the potassium-based compound (potassium carbonate and potassium phosphate) and the polymer matrix (polysiloxane and polyimide) is combined, so that the comprehensive performance of the fire extinguishing agent in a lithium battery fire disaster is remarkably improved, and the fire extinguishing requirements of various scenes are met; and the fire prevention and control safety of the lithium battery is fundamentally improved.

The invention belongs to the field of functional materials and water treatment, and provides a preparation method of organic phosphonic acid functionalized super-crosslinked chitosan hydrogel, which comprises the following steps: dissolving chitosan in an alkali solution to obtain a chitosan suspension; adding benzaldehyde into the chitosan suspension, and carrying out condensation reaction to obtain a modified chitosan suspension; reacting the modified chitosan suspension with a quinary organic phosphonic acid solution to obtain an organic phosphonic acid functionalized chitosan solution; adding a potassium tripolyphosphate solution into the organic phosphonic acid functionalized chitosan solution, carrying out a cross-linking reaction, carrying out alcohol precipitation after the reaction is completed, carrying out solid-liquid separation, and collecting a precipitate; dispersing the precipitate in water to obtain a suspension; and uniformly mixing the suspension with a sodium alginate solution and a calcium salt solution, and carrying out a cross-linking reaction to obtain the quinary organic phosphonic acid functionalized super-crosslinked chitosan hydrogel. An organic phosphonic acid group and a C-P covalent bond are successfully introduced into a chitosan molecular chain, the morphology structure of original chitosan powder is greatly improved, adsorption sites on the chitosan molecular chain are enriched, and efficient application of chitosan in uranium-containing wastewater is remarkably improved.

The application discloses a kind of antifreeze for preventing and treating late frost injury of forsythia suspensa and its preparation method and application, belong to antifreeze technical field.The antifreeze for preventing and treating late frost injury of forsythia suspensa is prepared by using potassium phosphate, brassinolide, boron, amino acid and saccharide, and the cell freezing point is reduced by using potassium phosphate and saccharide for osmotic regulation, ice crystal formation is inhibited, while boron and amino acid jointly stabilize cell membrane and cell wall structure, and mechanical damage caused by low temperature is reduced;Brassinolide as key regulatory signal, can activate the antioxidant enzyme system in vivo, effectively remove active oxygen accumulated under low temperature stress, and relieve oxidative damage;Amino acid and saccharide provide direct nutrition and energy support for flowering period, promote the accumulation of protective substances, and maintain metabolic balance.Each component is synergized through multiple pathways of "osmotic protection-structure reinforcement-oxidative defense-metabolic support", so that the overall cold resistance is significantly improved.

The invention discloses a diaryl hydrazine compound and a preparation method thereof, and the preparation method comprises the following steps: mixing an azobenzene compound, an alkyl NHPI ester reagent, a photosensitizer, an alkaline reagent and a solvent, and reacting under the irradiation of visible light to obtain the diaryl hydrazine compound, wherein the photosensitizer is one or a mixture of two of 2, 4, 5, 6-tetrakis (carbazole-9-yl)-1, 3-dicyanobenzene, di [2-(2, 4-difluorophenyl)-5-trifluoromethylpyridine] [2-2 '-bis (4-tert-butylpyridine)] iridium hexafluorophosphate, and the solvent is one or a mixture of two of 2, 4, 5, 6-tetrakis (carbazole-9-yl)-1, 3-dicyanobenzene and di [2-(2, 4-difluorophenyl)-5-trifluoromethylpyridine] [2-2'-bis ( And the alkaline reagent is one or a mixture of more of N, N-diisopropylethylamine, potassium phosphate and 1, 8-diazabicyclo [5.4. 0] undec-7-ene. The preparation method disclosed by the invention has the advantages of easily available raw materials, simplicity in operation, mild reaction, wide substrate applicability and the like.

The invention provides an artificial saliva spray. The artificial saliva spray is prepared from the following components in percentage by mass: 0.001 to 0.003 percent of hydrogenated castor oil, 0.02 to 0.07 percent of xanthan gum, 0.01 to 0.03 percent of cyclodextrin, 0.01 to 0.02 percent of calcium chloride, 0.01 to 0.05 percent of dipotassium phosphate, 0.1 to 0.15 percent of potassium chloride, 0.05 to 0.1 percent of sodium chloride, 0.004 to 0.006 percent of magnesium chloride and the balance of water. The artificial saliva suitable for the spray is provided, the dosage is accurate, the good oral cavity adhesion capacity is achieved, and the effect maintaining time is long.

The application provides a detection reagent composition and kit for diabetic retinopathy, and belongs to the field of molecular detection. The reagent composition in the application is used for detecting miRNA markers in blood samples to achieve the purpose of diagnosing diabetic retinopathy. The reagent composition comprises primers and buffer for RT-PCR. The buffer comprises Tris-HCl, NH4Cl, 1,2-propanediol, potassium phosphate and MgCl2. The molar concentration ratio of the components is 3-6:2-4:20-30:5-8:0.1-0.4. The kit provided by the application has good repeatability and sensitivity, and is suitable for application in clinical practice.

The application relates to a magnesium alloy micro-arc oxidation process, a magnesium alloy and application thereof, and the process comprises the following steps: firstly, a magnesium alloy workpiece to be treated is pretreated and then placed into an electrolyte; the composition of the electrolyte comprises the following components: 5-10 g / L of sodium silicate, 10-15 g / L of potassium pyrophosphate, 1-3 g / L of sodium aluminate, 3-5 g / L of sodium hydroxide and 1-10 g / L of potassium fluorotitanate; then, the magnesium alloy workpiece is subjected to micro-arc oxidation treatment by using the electrolyte; during the micro-arc oxidation treatment, the pH value of the electrolyte is greater than 12, the treatment temperature is 25+ / -5 DEG C, the current density is 1-5 A / dm2, and the treatment time is 5-60 min; then, the electrolyte is subjected to component analysis according to a preset interval, and the concentration of each component of the electrolyte is adjusted according to the analysis result. The application solves the problems that the yield of magnesium alloy prepared by the current magnesium alloy micro-arc oxidation is low, the corrosion resistance is insufficient, and the magnesium alloy is difficult to be used in a cooling liquid corrosion environment for a long time.

The application belongs to the field of lithium battery recycling, and particularly relates to a lithium recovery method from lithium iron phosphate battery black powder, comprising the following steps: pretreatment; screening the lithium iron phosphate battery black powder through a 200-mesh sieve, oxidizing the powder with oxygen for 20-40 min to obtain powder a; dry ball milling: weighing sodium phosphate acid salt, powder a and potassium superphosphate, mixing and dry milling for 2-3 h to obtain powder b; iron removal: dissolving the dry-milled powder b in water and filtering to obtain solid phase a and filtrate a; adding 0.1-0.3 wt.% of alkali to the filtrate a, filtering to obtain filtrate b; lithium leaching; adding a saturated water-soluble carbonate solution to the filtrate b obtained in S3, heating and concentrating, and filtering while hot; washing and enriching; filtering after hot water washing, collecting the solid phase, and completing lithium recovery. The application replaces lithium ions with potassium ions and sodium ions, cooperates with mechanical ball milling and the oxidation effect of persulfate, cooperates to leach lithium, has small equipment corrosion, and the lithium leaching rate can reach more than 98%.

The invention provides a liquid curing agent for treating expansive soil and a stability judgment method thereof. In the liquid curing agent, the solid-to-liquid ratio of the potassium phosphate solution to the surfactant to the water is (2.5-10): (0.02-0.12): (2-8) (ml / g / L). The stability judgment method for treating expansive soil comprises the following steps: preparing a liquid curing agent solution and treating an expansive soil sample by adopting a high-pressure perfusion method; in the specified curing period, an expansibility test, a mechanical property test and a durability test are conducted respectively; and quantitatively judging the stability of the treated expansive soil by adopting a comprehensive evaluation index system. The curing agent reaction product is stable, and no harmful substance is released; raw materials are low in cost and suitable for large-area construction; and the treated soil body has excellent dry-wet cycle resistance and excellent long-term stability. The determination method can scientifically and systematically evaluate the stability effect of the liquid curing agent on the expansive soil, and provides a basis for engineering material selection, construction quality control and later effect evaluation.

The present invention relates to a liquid pharmaceutical composition comprising (i) totally dissolved tretinoin or a pharmaceutically acceptable isomer thereof; (ii) d-alpha-tocopheryl polyethylene glycol 1000 succinate (TPGS); (iii) a pH-modifying agent selected in the group consisting of meglumine, potassium hydroxide (KOH), sodium hydroxide (NaOH), sodium acetate (anhydrous, trihydrate, and mixtures thereof), potassium acetate (anhydrous, trihydrate, and mixtures thereof), di-potassium hydrogenophosphate, di-sodium hydrogenophosphate, tri-sodium phosphate, tri-potassium phosphate, and mixtures thereof; and (iv) water. The present invention also relates to the medical uses of such a composition.

The invention discloses a rapid repair material suitable for ocean engineering in a low-temperature environment as well as a preparation method and application thereof, and belongs to the technical field of ocean engineering. The repairing material comprises the following components in percentage by mass: 1.0%-1.6% of light calcined magnesia at 1000 DEG C, 19.0%-24.0% of dead calcined magnesia at 1700 DEG C, 6.5%-8.0% of monopotassium phosphate, 1.7%-2.5% of boric acid, 5.0%-7.0% of hydrogen-based mineral phase conversion iron tailing powder, 51.9%-56.5% of iron tailing sand, 1.5%-1.7% of wollastonite powder, 0.1%-0.2% of a water reducing agent and 6.1%-7.3% of water. According to the invention, light calcined magnesia at 1000 DEG C, dead calcined magnesia at 1700 DEG C and monopotassium phosphate are used to construct a magnesium potassium phosphate cement system, boric acid is used as a retarder, and a polycarboxylic acid water reducer is used as a plasticizer; the hydrogen-based mineral phase conversion iron tailing powder is used as an admixture, the wollastonite powder is used as a fiber micro-aggregate, and the iron tailings are used as a fine aggregate, so that the compactness, the structural strength and the hardness of a hardened body are improved, and the high-performance requirement of ocean engineering rapid repair in a low-temperature environment is met.

This invention relates to an outdoor cultivation method for Haematococcus pluvialis to improve astaxanthin yield, belonging to the field of Haematococcus pluvialis cultivation technology. The invention includes four main steps: (1) after Haematococcus pluvialis is cultured indoors, it is separated into outdoor GP pipes and cultured under conventional stress for three days, followed by the addition of red-converting culture medium; (2) the carbon dioxide and air ratio is adjusted the next day to adjust the pH value of the algal solution in the GP pipe to between 9.0 and 10.5; (3) when the pH value reaches between 9.0 and 9.5, potassium pyrophosphate is added; and (4) the Haematococcus pluvialis is then cultured outdoors for 11 to 22 days. By adding potassium pyrophosphate during the outdoor cultivation process, this invention effectively improves the synthesis rate of astaxanthin. After adding potassium pyrophosphate and continuing to cultivate for 11 days, the astaxanthin content in the algal solution can reach 5.7%, shortening the cultivation time and accumulating more astaxanthin in a shorter time, thereby improving the astaxanthin yield.