296 results about "Palmitic acid" patented technology

The invention belongs to the technical field of microorganisms, and particularly relates to pseudomonas monteilii BDLZ-3 and application thereof in relieving continuous cropping obstacles of crops. The invention discloses a strain of pseudomonas monteilii BDLZ-3, the preservation number of which is CGMCC (China General Microbiological Culture Collection Center) No.34349. The pseudomonas monteilii BDLZ-3 is separated and screened from the nature for the first time, phenolic acid autotoxic substances generated in the ginseng continuous cropping obstacle process can be efficiently degraded, the degradation rate of benzoic acid can reach 95.36%, various phenolic acids such as vanillic acid, cinnamic acid, palmitic acid and gallic acid can be effectively degraded, and the degradation spectrum is wide; when the pseudomonas monteilii BDLZ-3 is applied in a field, the content of benzoic acid in soil can be effectively reduced, meanwhile, the occurrence of ginseng root diseases can be controlled to a certain extent, the prevention and treatment effect reaches 41.23%, the growth indexes such as root length and root thickness are remarkably improved, and the yield increasing effect is achieved.

The invention relates to a high-performance reactive asphalt cold patch mixture and a preparation process thereof. The mixture comprises a sulfonated fatty acid diluent, a graded aggregate, an atomic layer deposition (ALD) modified basalt aggregate and a solid waste-based composite curing agent. The sulfonated fatty acid diluent is prepared by sulfonating oleic acid, linoleic acid and palmitic acid through sulfamic acid, the sulfonation degree is 15-20%, and the sulfonated fatty acid diluent contains an epoxy three-membered ring structure; the 3-5mm aggregate is used as a transition layer to block the caking path of the fine aggregate; the basalt aggregate is subjected to TDMAT and TMA alternate deposition to form a Ti < x > Al < gamma > O < 2 > nano film; the curing agent comprises calcium strontium sulphoaluminate minerals, a titanium gypsum-carbide slag compound and magnesium-loaded lithium slag. During preparation, the modified aggregate, the sulfonated diluent and the curing agent are mixed at normal temperature. The problems that a traditional cold repairing material is poor in low-temperature fluidity and weak in interface bonding are solved, the viscosity at-20 DEG C is smaller than or equal to 450 mPa.s, the 7-day strength is larger than or equal to 5.2 kN, and the cold repairing material is suitable for low-temperature emergency repairing.

The invention belongs to the technical field of crystal compound preparation, and particularly relates to a crystallization process of small-particle-size palmitic acid paliperidone. The invention discloses a small-particle-size palmitic acid paliperidone crystallization process, solves the problems of large particle size, non-uniform distribution and serious agglomeration of the existing process product, and meets the requirements of long-acting injection bulk drugs. The process comprises the following steps: adding paliperidone palmitate into a specific mixed organic solvent according to a solid-to-liquid ratio of 0.04-0.09 g / g, stirring, dissolving and filtering at 65-75 DEG C, transferring into a high-pressure closed crystallizer, and pressurizing to 1.0-1.5 MPa; cooling and decompressing in sections, stirring, filtering and washing, and drying in vacuum at the temperature of 40-50 DEG C and the vacuum degree of-0.1 MPa to obtain a finished product. According to the invention, the process parameters are accurately controlled, the product is an irregular short rod-like / granular crystal, the particle size is in a normal single peak, the Dv (90) is 7.866-9.514 microns, the HPLC (High Performance Liquid Chromatography) purity is greater than or equal to 99.92%, the yield is greater than or equal to 90.25%, micronization is not needed, the process is stable, the economical efficiency is good, and the industrial application value is realized.

The invention provides a GC-MS (Gas Chromatography-Mass Spectrometer) quality detection method for a pulse-invigorating and blood-glucose-reducing traditional Chinese medicine composition. The detection method has the advantages of simple and convenient operation steps, accurate detection and high stability. According to the preparation method, volatile components in the blood-glucose-promoting and blood-glucose-reducing granules are determined, and 15 batches of content determination shows that the content of atractylenol in the blood-glucose-promoting and blood-glucose-reducing granules is 0.0205 to 0.1893 mg / g, the content of beta-eudesmol in the blood-glucose-promoting and blood-glucose-reducing granules is 0.0643 to 0.5737 mg / g, the content of palmitic acid in the blood-glucose-promoting and blood-glucose-reducing granules is 0.7319 to 5.1163 mg / g, the content of ferruginol in the blood-glucose-promoting and blood-glucose-reducing granules is 0.0743 to 0.2356 mg / g, and the content of tanshinone IIA in the blood- The detection method can be used as an internal control quality detection standard of the product to further guarantee the product quality. And the detection method can also be used for identifying the chemical components of the traditional Chinese medicine composition for dredging collaterals and reducing blood glucose, and has a good market prospect.

The invention relates to the technical field of nutritional foods, and particularly discloses a nutritional composition for improving muscle functions and application. The nutritional composition for improving the muscle function, provided by the invention, is prepared from the following components in parts by mass: 40 to 60 parts of 1, 3-dioleic acid-2-palmitic acid triglyceride and 20 to 70 parts of 1-oleic acid-2-palmitic acid-3-linoleic acid triglyceride. A specific amount of OPO and OPL are compounded, and the two components have a synergistic effect, so that the exercise amount and the ATP content of an organism are remarkably increased, sarcopenia is relieved by improving energy metabolism, the muscle function is improved, and the food has a wide application prospect in the field of food and is worthy of popularization and application. The food can be used in health-care food, formula food for special medical purposes, infant formula food or special diet food.

The invention discloses a botanical attractant for camellia weevils and application of the botanical attractant, and belongs to the technical field of plant disease and pest control. The botanical attractant provided by the invention comprises palmitic acid and / or phytol. The palmitic acid and / or the phytol have / has remarkable and efficient attraction activity on the camellia weevils, and are suitable for detecting the population trend of the camellia weevils, efficient attraction control and the like. Compared with a traditional method for chemically preventing and treating the camellia weevils at the present stage, the method for preventing and treating the camellia weevils through the plant source attractant is milder, more efficient, environmentally friendly and free of toxic and side effects, and important value can be provided for market application and application and popularization.

The invention relates to the technical field of building materials, and discloses a preparation method of a phase change material composite building thermal insulation material based on a porous structure. 13 to 18 parts of modified diatomite; 9 to 13 parts of nano cellulose aerogel; 7 to 11 parts of food-grade palmitic acid; 8 to 13 parts of microcapsule bio-based PCM; 0.9 to 1.4 parts of modified graphene; 11 to 15 parts of environment-friendly polylactic acid; 7 to 10 parts of montmorillonite; 1-2 parts of nano silicon dioxide; by compounding the expanded perlite, the modified diatomite and the nanocellulose aerogel, a basic framework with high porosity and low heat conductivity is constructed, heat conduction is effectively blocked, by introducing food-grade palmitic acid and microcapsule bio-based PCM, the material is endowed with heat storage and temperature regulation functions, phase change latent heat is improved, and the thermal conductivity of the material is improved. By adding modified graphene and nano silicon dioxide, an efficient heat conduction network and a heat insulation structure are formed, and the heat conductivity coefficient of the composite building heat preservation material is further reduced.

This invention provides a safe, environmentally friendly and solvent free method for dispersing graphene into polymeric compositions. In this process solid particles of graphene in a fatty acid matrix are mixed into the polymeric composition. The use of these solid graphene containing particles does not create dust while being mixed into the polymer and can much more easily be mixed into the polymer. Since fatty acids, such as stearic acid, palmitic acid, and oleic acid, are frequently incorporated into the polymeric formulations used in making a wide variety of products, this technique also offers a good method for introducing the fatty acid into the polymeric formulation. In such fatty acid containing polymeric formulations this technique also offers the advantage of not introducing unwanted solvents or agents into the formulation.

The invention belongs to the field of functional substance research, and particularly relates to a nutritional composition for promoting absorption of fatty acid and mineral substances and application. The nutritional composition provided by the invention comprises necessary active ingredients shown as the following (I) and (II): (I) 1, 3-dioleic acid-2-palmitic acid triglyceride; (II) a milk fat globule membrane, and / or, 2 '-fucosyllactose; moreover, in the nutritional composition, the mass ratio of the necessary active component shown in (I) to the necessary active component shown in (II) is (5-10): (0.5-10). The combination of OPO and MFGM and / or 2 '-FL provided by the invention can be beneficial to promoting the absorption of the body to fatty acids and mineral substances, and especially can be beneficial to promoting the transmembrane transport capability of intestinal cells of the body to fatty acids and mineral substances, so that the absorption efficiency is improved.

The invention relates to the technical field of biological pharmacy, in particular to application of a recombinant protein DEL-1 in preparation of a medicine for resisting pancreatic beta cell inflammation. The recombinant protein DEL-1 has a remarkable inhibition effect on pancreatic beta cell inflammatory response induced by high glucose and high fat. Experiments show that in an islet beta cell inflammation model constructed by combining high glucose with palmitic acid, DEL-1 can significantly reduce the expression level of inflammatory factors such as IL-1beta, IL-6, TNF-alpha and the like. The DEL-1 is proved to have a definite effect of resisting pancreatic beta cell inflammation.

The application provides a thermoelectric hydrogel composite dressing for promoting repair of diabetic ulcers and loading of targeted modified exosomes and a preparation method, which comprises the following steps: preparing methacrylated hyaluronic acid; preparing polyether F127 diacrylate; co-incubating exosomes with palmitic acid grafted targeting peptides to prepare targeted modified exosomes; mixing the methacrylated hyaluronic acid, the polyether F127 diacrylate, a photosensitizer, the targeted modified exosomes and an electrolyte, and crosslinking under ultraviolet light to form a composite gel. The composite dressing is a novel composite dressing for thermoelectric stimulation and exosome treatment. On one hand, the dressing generates a wireless and passive electric field to simulate the endogenous electric field in the wound, promote directional migration of skin cells, accelerate reepithelialization and dermal formation; on the other hand, the dressing releases exosomes to precisely target blood vessels of a wound lesion, reverse endothelial dysfunction in a high-sugar environment and promote angiogenesis, and effectively solves the problems in repair and regeneration of diabetic ulcer wounds.

The invention provides a composition for promoting differentiation of intestinal immune cells as well as a preparation method and application of the composition. According to the composition, 1, 3-dioleic acid-2-palmitic acid triglyceride and breast milk oligosaccharide are used in a combined manner, so that monocytes can be effectively promoted to differentiate into intestinal macrophages, and inflammation is reduced to a certain extent. After the monocytes are differentiated into the intestinal macrophages, the intestinal immune homeostasis and intestinal microbiota inflammatory response can be regulated, so that the mucosal immune homeostasis and intestinal epithelial cell barrier function are maintained. Therefore, the composition provided by the invention can improve the intestinal immune barrier by promoting the monocytes to differentiate into the intestinal macrophages, and provides a new thought for improving the early intestinal barrier of infants through nutritional supplement.

The invention relates to the technical field of petroleum drilling fluid loss reduction, and discloses an anti-divalent salt fluid loss agent for drilling fluid, which is prepared by the following steps: step 1, beta-cyclohexylamine and 6-chloro-1-hexene are subjected to a reaction to obtain alkenyl beta-cyclohexylamine; step 2, initiating polymerization of alkenyl beta-cyclopentadiene, a hyperbranched monomer pentaerythritol triallyl ether and 2-acrylamide-2-methylpropanesulfonic acid under the action of azobis (isobutylamidine hydrochloride), so as to obtain an intermediate A; 3, 3-dimethylamino-1-propylamine and palmitic acid are subjected to a reaction, and an intermediate 2 is obtained; 4, the intermediate 2 and benzyl chloride are subjected to a reaction, and quaternary ammonium salt modified fatty acid is obtained; and 5, stirring and mixing the intermediate A, quaternary ammonium salt modified fatty acid and coupling agent modified walnut powder to obtain the divalent salt resistant filtrate reducer for the drilling fluid. The anti-divalent salt filtrate reducer for the drilling fluid has a relatively good anti-divalent salt effect.

A use of a nutritional composition in promoting the bidirectional development of the gut and brain via the gut-brain axis. The nutritional composition comprises the following essential components: docosahexaenoic acid, eicosatetraenoic acid, galactooligosaccharide, 1,3-dioleic acid-2-palmitic acid triglyceride, lutein, nucleotide, lactoferrin, casein phosphopeptide, and probiotics. By combining and strengthening multiple functional active components, the gut health and brain cognitive development of the organism can be bidirectionally promoted by means of the microbiota-gut-brain axis. In particular, the present application can promote the regulation of flora in the gut of the organism, increase the abundance of beneficial bacteria, and decrease the abundance of harmful bacteria related to brain development diseases. The content of butyric acid in the gut can be increased, and the contents of acetic acid and propionic acid are decreased to promote brain and cognitive development.

The invention relates to the technical field of building materials, and discloses a mortar containing a nanometer material and a preparation method thereof, the mortar comprises 70-80 parts by weight of cement, 8-12 parts by weight of fly ash, 0.4-0.5 part by weight of a polycarboxylic acid water reducer, 0.4-0.6 part by weight of hydroxypropyl methyl cellulose, 1-2 parts by weight of the nanometer material, 2-3 parts by weight of modified silk fibroin and 40-50 parts by weight of water. Wherein the modified nano silicon dioxide is modified by gamma-aminopropyltriethoxysilane, the modified cubic nano calcium carbonate is subjected to compound modification by fumaric acid, sodium stearate and palmitic acid, and the modified silk fibroin is prepared by grafting modification by bis-aminopropyl terminated polysiloxane. According to the mortar, through optimization of component matching and modification treatment of the nano material and the silk fibroin, the mechanical property, durability and crack resistance of the mortar are remarkably improved, and the cost is controllable.

The invention discloses boletus brownii xylan palmitate as well as a preparation method and application thereof. The boletus brownii xylan palmitate is xylan palmitate which is formed by alpha-(1-> 4)-xylose as a main chain, alpha-(1->)-glucose as a branch chain and palmitic acid molecules through ester bonds. The invention further discloses a preparation method of the boletus brownii xylan palmitate and application of the boletus brownii xylan palmitate in the aspect of immunoregulation. The boletus brownii xylan palmitate can be used as a dietary supplement or a food additive for immunodeficiency patients and tumor patients.

This invention belongs to the field of genetic engineering technology, specifically involving GmDREB2A2 Application of genes in regulating fatty acid content in plants. Overexpression. GmDREB2A2 Gene regulation of fatty acid content in plants. This invention utilizes an exogenous gene sequence expression vector to express the coding sequence shown in SEQ ID NO.1. GmDREB2A2 Gene sequences are introduced into plants to enable GmDREB2A2 Gene overexpression. Under these conditions, the plant's linolenic acid, linoleic acid, and palmitic acid content were significantly higher than the control, while the content of eicosatrienoic acid and erucic acid was significantly reduced.

The invention relates to the technical field of preparation of health-care products, in particular to a fat-soluble component nano-emulsion and a preparation method thereof. The preparation method comprises the following steps: stirring and dissolving the antioxidant and the caprylic / capric triglyceride, adding the vitamin D3 and the retinyl palmitate, and stirring and dissolving to obtain an oil phase; stirring the starch sodium octenylsuccinate in purified water until the starch sodium octenylsuccinate is dissolved, adding glycerol, and uniformly stirring and mixing to obtain a water phase; adding a small amount of water phase into the oil phase, and stirring at high speed to obtain primary emulsion; adding the primary emulsion into the residual water phase, stirring at a high speed, shearing and homogenizing to obtain a nano embedding emulsion; adding citric acid, cane sugar and sodium ascorbate into purified water, adding the nano embedding emulsion, and uniformly stirring to obtain a concentrated solution; and diluting the concentrated solution and adjusting the pH value to obtain the fat-soluble component nano-emulsion. The fat-soluble component nano-emulsion provided by the invention has good safety; the product can be easily absorbed and utilized by a human body, and is convenient for people to quickly supplement vitamin A and vitamin D3 required by the body.

The invention relates to the field of biological medicine, in particular to application of disulram in preparation of an orthopoxvirus inhibitor, the disulram is specifically combined with palmitic acid on MPXV gp045 membrane protein to show a remarkable inhibition effect on orthopoxviruses, and when IC50 of the disulram is 825nM, diffusion of the orthopoxviruses can be remarkably inhibited; in HeLa and Huh7.5. 1 cells, when IC50 is 3022nM and 7125nM respectively, formation of EEV can be remarkably inhibited, so that further transmission of orthopoxvirus is prevented, and a more comprehensive intervention means is provided for treatment of orthopoxvirus resistance.

The invention discloses a production method and application of a fulvic acid culture medium with the content reaching 95%. The culture medium takes weathered coal as a raw material and comprises 30-70 g of humic acid, 4-30 g of fulvic acid, 2-20 g of ulmic acid and 2-20 g of humic acid. The ash content is 4-15%, the ratio of C to N is (25-30): 1, the organic matter is 40-80%, and the N.P.K content is 3-4%; the formula comprises 40-70% of humic acid, 6-30% of fulvic acid, 3-15% of ulmic acid and 3-15% of black humic acid. During production, 800-1000 g of raw materials and 400-500 g of sterile water are stirred, 1-2 g of stock seeds are added, the pH value is adjusted to be 6-7, the temperature of an incubator is controlled to be 48-60 DEG C, the humidity is controlled to be 75-85 DEG C, a proper amount of oxygen is added, and shading fermentation is conducted for 48-72 h. The obtained enzyme bacteria contain various organic acids, various amino acids, various oxygen-containing functional groups, various life elements and the like, the viability of beneficial bacteria reaches 90-260 billion / g and is far beyond the standard of 0.2 billion / g of the national standard, meanwhile, the bacteria can also be used for producing third-level bacterial manure which is suitable for field and gardening cultivation, and the effect is extremely good. After application, vicious circle of chemical fertilizer and pesticide can be converted into ecological virtuous circle, and technical progress is highlighted.

The invention relates to the production of a triglyceride with Palmitic acid (P) in the middle position (XPX). A first transesterification process is used to produce a vegetable fat composition rich in palmitic acid and said intermediate composition is then further processed to produce triglycerides having a high proportion of its palmitic acid in the middle position.

The invention belongs to the technical field of organic synthesis, and relates to a preparation method of N-palmitoyl-O-phosphorylcholine serine and a deuterated substance thereof. The N-palmitoyl-O-phosphorylcholine serine and the deuterated substance thereof are obtained by taking L-serine methyl ester hydrochloride and palmitic acid as raw materials through amidation reaction, phosphate esterification reaction, quaternization reaction, oxidation reaction, reduction reaction and the like. The invention provides an approach for industrial production of the N-palmitoyl-O-phosphorylcholine serine and the deuterated substance thereof, and is very important for standardization of the detection method of the N-palmitoyl-O-phosphorylcholine serine.

The invention discloses a generalized pustular psoriasis diagnosis marker based on metabonomics and application of the generalized pustular psoriasis diagnosis marker. The diagnostic marker is prepared from one or more of the following 35 compounds: pyruvic acid, alpha-ketoisovaleric acid, 2-hydroxybutyric acid, 3-hydroxybutyric acid, methane thiophosphoric acid, proline, uracil, tranexamic acid, 4-aminobutyric acid, threonine, scopoletin, dodecanol, N-methyl-L-leucine, L-cysteine-glycine and L-kynurenine. The feed additive is prepared from the following raw materials: 3-hydroxybenzoic acid, allantoin, delta-tocopherol, xylofuranose, glucose-1-phosphoric acid, pyrophosphate, taurine, L-asparagine, phthalic acid, 4-(dimethylamino) azobenzene, 5-tert-butyl-1h-indole-2, 3-dione, quinic acid, glucose, histidine, lysine, palmitic acid, 7-methylguanine, oleic acid and whale acid. The marker can be used for accurately distinguishing patients with generalized pustular psoriasis from healthy people.

The present disclosure provides a method of reducing, preventing or treating an intestinal infection, preventing or treating a disease associated with protozoan parasite of the genus Eimeria, inhibiting an oocyst sporulation of a protozoan parasite or preventing a sporozoite invasion or reproduction, preventing or treating coccidiosis, promoting growth performance, controlling, treating and / or preventing necrotic enteritis in a subject, comprising administering to the subject an effective amount of a composition comprising a Crassocephalum rabens (CR), a bioactive extract thereof (CRE), an active ingredient(s) contained in a CR (CR_API) or CRE (CRE_API), a combination of two or more of a CR, a CRE, a CR_API and a CRE_API, or one or more of a-linolenic acid, citric acid, lactic acid, mannitol, palmitic acid, aspartic acid and 1-monomyristin.

Methods and compositions comprising free fatty acids for the treatment, including prevention, of viral infections, including the treatment of Acute Respiratory Distress Syndrome (ARDS). The compositions comprising free fatty acids, optionally linolenic acid, linoleic acid, and / or palmitic acid, may be used in methods for treating viral infections, optionally, coronavirus infections, for example, SARS-CoV, MERS-CoV, and / or SARS-CoV-2 / COVID-19, and influenza virus infections, optionally, H1N1 and / or H5N1.

The invention relates to a plant genetic engineering technology, in particular to a method for producing insect pheromone precursor substances in soybeans. Specifically, transgenic soybeans for expressing exogenous calyx flower plant thiolipase and insect desaturase are obtained through a genetic engineering technology, the transgenic soybeans can synthesize insect pheromone precursor substance cis-11-hexadecenoic acid, and therefore the biological efficiency and feasibility of plant factory pheromone production are proved. Furthermore, as the soybean is used as an oil crop with high acre yield, the soybean naturally contains high-content palmitic acid (C16: 0), the acre yield of the insect pheromone precursor substance cis-11-hexadecenoic acid is predicted to be far higher than that of other plants, and the plant is an ideal biological factory for mass production of the insect pheromone precursor substance cis-11-hexadecenoic acid.

The invention belongs to the technical field of edible oil, and particularly relates to edible oil with a blood fat reducing effect and a preparation method of the edible oil. Comprising the following raw materials in parts by weight: 1 to 10 parts of base oil, 90 to 100 parts of 1-oleic acid-2-palmitic acid-3-linoleic acid triglyceride, 0.3 to 0.5 part of an emulsifier, 0.05 to 0.09 part of an antioxidant and 0.02 to 0.05 part of a stabilizer. The base oil is composed of the sunflower seed oil and the tea seed oil, and the base oil and the 1-oleic acid-2-palmitic acid-3-linoleic acid triglyceride are matched for use, so that the oil has a good blood fat reducing effect, and can effectively reduce cholesterol, maintain cardiovascular health and prevent arteriosclerosis. The antioxidant is composed of the vitamin E, the alpha-mangostin and the oryzanol, all the components have a synergistic effect and jointly improve the oxidation stability of the edible oil, and meanwhile, the antioxidant is matched with the stabilizer, so that the storage life of the edible oil can be effectively prolonged, and the storage stability is improved.

The invention discloses a special cementitious material for microwave-heated concrete, a preparation method thereof, and an application thereof, relating to the technical field of building materials. The cementitious material comprises components such as fly ash, steel slag, high-iron phase Portland cement clinker, high-belite sulfate cement clinker, gypsum, waste residue, solid waste, graphene, palmitic acid, and a water reducer. The high-iron phase Portland cement clinker contains more than 20% tetracalcium aluminoferrate and less than 3% tricalcium aluminate; the high-belite sulfate cement clinker contains more than 45% dicalcium silicate and 30-50% calcium sulfoaluminate. The cementitious material is made from specific solid waste, has excellent compressive strength, low resistivity, and high microwave heating efficiency, and can be used to prepare microwave-heated concrete.

The invention belongs to the field of water-based coatings, and discloses a water-based strippable coating used in the field of automobiles. The paint is prepared from the following components in parts by mass: 80 to 90 parts of polyurethane-acrylic emulsion, 1 to 3 parts of triethanolamine palmitate, 1 to 3 parts of flatting agent, 1 to 2 parts of defoaming agent, 0 to 0.5 part of thickening agent and 1 to 10 parts of inorganic filler. When the surface of a base material is coated with the water-based strippable coating, the film-forming property is good, the adhesive force and the mechanical property of the coating are moderate, and after weather resistance tests such as exposure to the sun and low temperature, the water-based strippable coating still has good performance and cannot be left on the base material.

The invention relates to the technical field of mineral flotation, and discloses a method for compounding a lithium oxide collecting agent in a low-temperature environment, and the lithium collecting agent comprises the following compounding raw materials in percentage by mass: 15-25% of palmitic acid soap; 10%-20% of sulfonated petroleum; 5% to 10% of iso-tridecanol polyoxyethylene ether; 8%-15% of fatty alcohol-polyoxyethylene ether; 3%-8% of polyoxyethylene ether sodium sulfonate; 5%-10% of dipropylene glycol monomethyl ether; 8%-15% of sodium carbonate; 2%-5% of sodium hydroxide; 0.5%-2.0% of sodium fluoride; 0.5%-2.0% of aluminum sulfate; 1%-4% of tannic acid; a synergistic surfactant system is formed by constructing palmitic soap and sulfonated petroleum as a main collecting frame and compounding isomeric alcohol ether, fatty alcohol-polyoxyethylene ether and polyoxyethylene ether sodium sulfonate, dipropylene glycol monomethyl ether is introduced as a low-temperature mutual solvent, and the low-temperature mutual solvent is used for collecting the high-temperature-resistant oil-displacing agent for the oil-displacing oil-displacing agent for the oil-displacing oil-displacing oil-displacing oil-displacing oil-displacing oil-displacing oil-displacing oil. The freezing point and viscosity of a collecting agent system are greatly reduced, the liquidity, uniformity and dispersion stability of the collecting agent are still kept when the collecting agent is used in the low-temperature environment of 0-15 DEG C, and the failure problem caused by low-temperature solidification or layering is fundamentally avoided.