296 results about "Linoleic acid" patented technology

The invention relates to the technical field of coatings, in particular to a modified FEVE fluorocarbon resin coating and a preparation method thereof. The problem that the FEVE fluorocarbon coating is poor in durability is solved. The preparation method comprises the following steps: modifying FEVE fluorocarbon resin with linoleic acid to obtain a granular material; stirring the modified FEVE fluorocarbon resin, polyisocyanate, montmorillonite and a composite solvent to obtain a prepolymer; pre-dispersing and grinding silicon carbide, modified zinc oxide, a dispersing agent and a composite solvent, adding nano composite particles for ultrasonic dispersion, and adding a prepolymer and a flatting agent to obtain the modified FEVE fluorocarbon resin coating. Wherein the FEVE fluorocarbon resin is modified, so that the crosslinking speed, the coating strength and the adhesive force are improved, the stain resistance, the weather resistance and the corrosion resistance are improved through the nano composite particles and the like, and finally the durability of the FEVE fluorocarbon resin coating is improved.

A dietary supplement composition is formulated in a therapeutic amount to maintain and promote urinary and prostate function in a human. The composition includes a shelf stable, supercritical CO2 fluid extracted, enhanced lipidosterolic extract of Serenoa repens (LSESr). The enhanced LSESr has a ratio of free fatty acids to total fatty acids that is greater than about 83.0% and an enrichment of lauric, myristic, oleic and linoleic acids as free fatty acids to total free fatty acids that is about 81.0% or greater.

The invention discloses a method for inducing nematode-trapping fungus predatory organ formation, and belongs to the field of applied microorganisms. The method comprises the following specific steps: culturing activated nematode-trapping fungi until spores are generated; washing off the cultured spores, and diluting to obtain a spore suspension with the concentration of 30000-60000 spores / mL; coating the spore suspension into an agar culture medium paved with glass paper, uniformly coating the spore suspension, culturing for 28-36 hours at the temperature of 25-28 DEG C, adding a mixed solution of a predatory organ inducer and water, and continuously culturing for 36-60 hours at the temperature of 25-28 DEG C, so that the nematode-trapping fungi can generate a large number of predatory organs; the predatory organ inducer is one of oleic acid, linoleic acid or pregnenolone. It is found for the first time that a large number of predatory organs can be generated when pregnenolone, oleic acid or linoleic acid is used for inducing nematode-trapping fungi.

The invention discloses a method for improving lipid droplet generation and promoting the differentiation process in the bovine adipocyte differentiation process, which comprises the following steps: (1) recovering primary bovine adipocytes, and culturing in a complete growth culture medium; (2) performing induced differentiation on the bovine adipocytes in an induced differentiation culture medium; and (3) replacing the bovine adipocytes subjected to induced differentiation with a culture medium containing 50-100 [mu] mol / L of linoleic acid, and culturing the bovine adipocytes. It is found for the first time that after bovine adipocyte differentiation is finished, culture continues to be conducted in a culture medium added with LA, lipid droplet generation in the bovine adipocyte differentiation process is improved, and the differentiation process is promoted.

The invention discloses a novel application of a composition of oleic acid, linoleic acid and Brusol or gemcitabine. According to the invention, oleic acid and linoleic acid are combined with different anti-tumor drugs, a pharmaceutical composition with a synergistic effect is screened out, and test results show that when oleic acid and linoleic acid in a specific proportion are combined with Brusol or gemcitabine, unexpected synergistic anti-pancreatic cancer activity can be obtained. The composition is expected to be developed into a new antitumor drug, can reduce the dosage of the antitumor drug, reduce drug resistance, reduce adverse reactions and improve the life quality of patients, and has important application prospects.

The invention discloses a KASP molecular marker related to brassica napus quality traits and application of the KASP molecular marker, and belongs to the technical field of molecular genetics. According to the KASP molecular marker related to the brassica napus quality traits, the primers of the KASP molecular marker and the application of the KASP molecular marker and the primers in brassica napus genetic typing or quality traits identification, results show that the KASP molecular marker can accurately identify genotypes, is high in sensitivity and specificity and effectively reduces the error rate. The invention also discloses a brassica napus genotyping / quality identification method, and the result shows that the material with the genotyping result of AA has the characteristics of low erucic acid content, low thioglycoside content, high oleic acid content, high linoleic acid content, low arachidonic acid content and low protein content; gG-type materials exhibit high erucic acid, high thioglycoside, low oleic acid, low linoleic acid, high arachidonic acid and high protein content. Individuals with excellent quality characters can be rapidly screened in early generations, and the long process of character identification after plant maturation in traditional breeding is avoided.

The invention relates to a soil conditioner based on nitrification inhibition and a soil acid control method, and belongs to the technical field of soil conditioning, the soil conditioner comprises the following components by weight: 20-22 parts of humic acid, 32-36 parts of syringic acid-linoleic acid modified porous hydroxyapatite, 4-5 parts of complete nitrifying bacteria, 2-5 parts of syringic acid, and 2.8-4.2 parts of sodium carboxymethyl cellulose. According to the technical scheme, syringic acid and linoleic acid serve as nitrification inhibitors, the nitrification inhibition rate can be effectively increased, ecological niches of ammonia-oxidizing archaea and ammonia-oxidizing bacteria can be reduced through competitive occupation due to addition of complete nitrifying bacteria, the nitrification rate of the ammonia-oxidizing archaea and the ammonia-oxidizing bacteria is inhibited, and N2O emission is reduced. Humic acid and hydroxyapatite can be used as pH buffer substances to regulate and control soil acidity, aluminum toxicity can be relieved, and physical and chemical properties of soil can be improved; meanwhile, the complete nitrifying bacteria can be ensured to have relatively high activity under the condition that the pH is 5.5-6.5.

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 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 present application relates to a kind of ultra-low VOC water-based paint and its preparation method, belong to paint technical field, and paint component includes modified acrylic-polyurethane hybrid emulsion, methyl linoleate, choline chloride-glycerol complex, modified nano titanium dioxide photocatalyst, PEG-40 stearate, thickening agent, preservative, pH regulator etc..The present application is prepared by special method modified acrylic-polyurethane hybrid emulsion, modified nano titanium dioxide photocatalyst, then with methyl linoleate, PEG-40 stearate, choline chloride-glycerol complex and other additives are prepared according to certain proportion Cooperation preparation paint, with the effect of fast curing and not cracking, very low VOC volatility, and good water resistance and acid and alkali resistance, strong adhesion.

The invention provides an application of linoleic acid in preparation of a feed for relieving fish salinity stress. According to the application of the linoleic acid in preparation of the feed for relieving the salinity stress of the fishes, related experiments verify that the addition of the linoleic acid enhances the overall tolerance of the fishes to the salinity stress, and under the stress environment that the salinity continuously rises, the stress resistance of the fishes to the salinity stress is improved. Fish has better growth performance, lower physiological stress level, stronger antioxidant ability and immune response and healthier tissue structure, and is beneficial to increase of culture benefits of freshwater fish and marine fish.

The invention discloses an environment-friendly underwater sound absorption polyurethane composite material and a preparation method thereof, the environment-friendly underwater sound absorption polyurethane composite material comprises a prepolymer, a chain extender and a filler, the prepolymer is a polymer obtained by polymerizing polyether and diphenylmethane diisocyanate, and the NCO value of the polymer is 12-18%; the chain extender takes butanediol as a hard segment and polyether and polyether polyol as soft segments; the environment-friendly polyurethane composite material for underwater sound absorption is a sound absorption material which does not contain ricinoleic acid, oleic acid and linoleic acid, can avoid water body pollution caused by explosive propagation of ricinoleic acid, oleic acid and linoleic acid, is used for replacing an existing sound absorption material, and has the advantages that the environment-friendly polyurethane composite material for underwater sound absorption is good in sound absorption effect and good in sound absorption effect. And water pollution is prevented while sound is absorbed.

The invention belongs to the technical field of cosmetics, and particularly relates to whitening and freckle-removing essence oil and a preparation method thereof. According to the invention, adamantane formyl is introduced into an alpha-arbutin benzene ring to obtain the adamantane formyl modified alpha-arbutin derivative, so that the compatibility of alpha-arbutin and base oil is enhanced; the alpha-arbutin is prevented from being converted into hydroquinone by utilizing the large steric effect of adamantane formyl, so that the safety of the whitening and freckle-removing essence oil is improved; the tranexamic acid is wrapped by the ceramide nano-emulsion, so that the skin allergy risk caused by ingestion of the tranexamic acid is reduced; the ceramide nano-emulsion and tranexamic acid act together to repair skin collagenous fibers, block melanin transfer and inhibit melanin synthesis; trilinolein and glabridin are catalyzed by lipase to form a compound, so that the molecular compatibility and photo-thermal stability of glabridin are enhanced; glycerin promotes transdermal absorption of glabridin and enhances the efficacy of the whitening and freckle-removing essence oil.

The invention discloses a pre-crosslinking surface active copolymerized nano-microsphere profile control agent for oil extraction and a preparation method thereof, and belongs to the technical field of profile control and water shutoff of oil fields. The nano-microsphere profile control agent is prepared from the following components in parts by weight: 50 to 60 parts of acrylamide, 10 to 15 parts of acrylic acid, 5 to 10 parts of methacryloyloxyethyl trimethyl ammonium chloride, 2 to 4 parts of an emulsifier, 0.5 to 1 part of nonylphenol polyoxyethylene ether, 8 to 12 parts of coal-based Fischer-Tropsch liquid wax, 2 to 4 parts of 2-acrylamido-2-methylpropanesulfonic acid, 0.1 to 0.3 part of a cross-linking agent and 0.05 to 0.1 part of an initiator. The emulsifier is prepared by reacting pentaerythritol with linoleic acid to generate a tetraester compound, then generating an epoxy compound under the action of formic acid and H2O2, and then reacting with laurinol. The prepared copolymerized nano-microsphere profile control agent is relatively small in particle size and can enter the deep part of a stratum, and the microsphere solution can realize step-by-step plugging due to mild expansibility.

The invention belongs to the technical field of microbial fermentation, and particularly relates to Wickerhamomyces anomalus and application thereof in preparation of ethyl palmitate, propyl linoleate or ethyl oleate. According to the present invention, the Wickerhamomyces anomalus is provided, the Wickerhamomyces anomalus is the Wickerhamomyces anomalus Lz5, the classification name of the Wickerhamomyces anomalus is Wickerhamomyces anomalus, the Wickerhamomyces anomalus is preserved in the China General Microbiological Culture Collection Center on June 19, 2025, and the preservation number of the Wickerhamomyces anomalus is CGMCC No. 34954; the address of the preservation unit is Institute of Microbiology, Chinese Academy of Sciences, No.3, No.1 Yard, Beichen West Road, Chaoyang District, Beijing; when the strain is used for fermenting sugarcane juice, ethyl palmitate, propyl linoleate and ethyl oleate can be prepared. In the culture medium after fermentation is finished, the content of ethyl palmitate can reach 13.68 mg / L. After subsequent extraction, the method can be used for industrial production.

The invention discloses an application and a construction method of a vascular endothelial injury reagent and a zebra fish model prepared from reverse oleic acid. Relates to the technical field of animal models. The invention provides specific application, a vascular endothelial injury zebra fish model construction method and a drug screening method. The zebra fish vascular endothelial injury can be stably induced, and a brand new experimental model and technical means are provided for mechanism research and drug screening of vascular endothelial injury related diseases. The method has the advantages of being short in test period, low in cost, simple and convenient in method and easy to operate, and real-time visual observation of pathological changes of the vascular endothelium can be achieved.

This invention discloses a bio-based flame-retardant thermally expanding powder coating and its preparation method, relating to the field of coatings. It comprises the following components: bio-based epoxy resin, phenolic epoxy curing agent, ammonium polyphosphate, nano-titanium dioxide, zinc borate, expanded graphene, 8-12 parts of imidazole, benzoin, and a leveling agent. The bio-based epoxy resin is prepared by ring-opening copolymerization of cashew phenol glycidyl ether and linoleic acid prepolymer, followed by epoxy end-capping, with an epoxy equivalent of 900-1200 g / eq; the phenolic epoxy curing agent has an epoxy equivalent of 200-250 g / eq; and the expanded graphene has an initial expansion ratio of 200-300 times. The preparation method employs a two-step, staged mixing process. This invention, while maintaining zero VOC in powder coatings and the same film thickness, achieves for the first time the outstanding performance of 6H hardness, UL94V-0 flame retardancy, and 120 times expansion ratio through the systematic synergy of high epoxy equivalent bio-based resin, four-component complete flame retardant system, specific EG:APP ratio, and two-step process.

The present invention relates to the field of inks, specifically to a high-adhesion magnetic ink, its preparation method and application in chip production. The preparation method of the high-adhesion magnetic ink comprises the following steps: first, synthesize sodium carboxyl-terminated hyperbranched polyester, and then load nano-ferroferric oxide thereon to obtain hyperbranched polyester loaded with nano-ferroferric oxide; prepare a silicon-acrylic prepolymer using acrylate compounds, vinyltriethoxysilane, oleic acid, and linoleic acid as monomers, then synthesize a basic alkyd resin, and then compound the basic alkyd resin, the silicon-acrylic prepolymer, the hyperbranched polyester loaded with nano-ferroferric oxide, triethylamine, ethylene glycol dibutyl ether, ethanol, and water to prepare the high-adhesion magnetic ink. The ink can be cured by heating at 130 °C for 10 min, and has the advantages of strong adhesion fastness and good magnetic separation performance, and can be used to mark defective crystal grains, and then the defective crystal grains can be separated by magnetic separation technology.

The present disclosure relates to production of cis-3-hexenol from unsaturated fatty acid, such as alpha linoleic acid and linoleic acid. The process of the present disclosure involves combinatorial and sequential action of recombinant enzymes, such as LOX, HPL and ADH for the production of cis-3-hexenol.

The formula comprises the following raw materials in parts by weight: 70-85 parts of base liquor, 5-15 parts of fresh pandan leaves, 0.5-3 parts of baked pandan leaf powder, 1-3 parts of a flavor modifier, 3-8 parts of a sugar source and 0.1-0.6 part of a functional additive. The unique flavor of the pandan leaves originates from the rich 2-acetyl-1-pyrroline, and the pandan leaves give out charming rice dumpling fragrance and have the effects of promoting appetite and metabolism at the same time. The pandan leaves are blended into the food, so that the delicious taste is improved, and additional nutritional value is also brought. The pandan leaves are rich in dietary fibers, vitamin B family, vitamin C and various minerals. The composition also contains squalene, linoleic acid, estragole, phytol and other active ingredients. Squalene is a natural organic terpenoid, widely exists in a living body, and has remarkable effects in the aspects of promoting blood circulation, resisting oxidation, resisting inflammation, resisting tumors and the like. The prepared pandan wine has multiple effects and is beneficial to body health after being drunk for a long time.

The invention discloses quick-drying alkyd resin and a preparation method thereof, and belongs to the technical field of resin.The quick-drying alkyd resin is prepared from, by weight, 10-12 parts of trimethylolpropane, 8-15 parts of phthalic anhydride, 15-18 parts of linoleic acid, 5-8 parts of four-terminal alkenyl terephthalic acid derivatives, 15-20 parts of xylene, 2-3 parts of styrene and 0.02-0.03 part of initiator. The four-terminal alkenyl terephthalic acid derivative and styrene are used for synergistic modification, the prepared quick-drying alkyd resin has excellent mechanical properties, meanwhile, the drying time is shortened, and the requirement of the market for quick-drying materials is sufficiently met.

The invention discloses a protein-based composite system for embedding linoleic acid based on a physical field as well as a preparation method and application of the protein-based composite system, and relates to the field of compositions of high-molecular compounds. According to the method, the protein compound is modified through DHPM or TSE, no organic solvent is used, heating is not needed, and the method is a novel method for obtaining the green and safe functional protein compound and is environmentally friendly and efficient. And meanwhile, a high-pressure emulsion homogenizing technology is adopted to prepare an emulsion loaded with linoleic acid, so that the stability of the linoleic acid is improved, the bioaccessibility of the linoleic acid is improved, and controllable slow release of the linoleic acid in the intestinal tract is realized. The prepared protein-based composite system based on physical field embedded linoleic acid has excellent solubility, thermal stability and oxidation resistance, can resist gastrointestinal tract temperature and is suitable for gastrointestinal tract absorption when people eat the protein-based composite system, and can be applied to edible nutritional factor delivery products.

The invention discloses traditional Chinese medicine granules with an auxiliary blood pressure lowering effect and a preparation method thereof. The traditional Chinese medicine granules are prepared by mixing uncaria, scutellaria baicalensis, semen cassiae, the root of kudzu vine, selfheal, leonurus, gastrodia elata, microcrystalline cellulose and a ginseng essential oil slow-release agent and then carrying out granulation and freeze-drying processes. Wherein the ginseng essential oil sustained-release agent is prepared by adopting ginseng essential oil and Tween 80 to form a nano microemulsion, then wrapping the nano microemulsion in a chitosan and sodium linoleate compound coating solution and performing freeze drying, and the ginseng essential oil sustained-release agent prepared in the mode can effectively prevent the ginseng essential oil from being in contact with oxygen to cause an oxidation phenomenon; the core functions of the ginseng essential oil sustained-release preparation are to control the release rate of active ingredients, reduce the administration frequency, maintain more stable blood concentration or active ingredient level, prolong the retention time of the medicine in gastrointestinal tracts, further promote absorption and improve the bioavailability.

Long term storage stable fulvestrant-containing compositions are disclosed. The compositions can include fulvestrant; a solvent selected from dimethyl sulfoxide (DMSO), glycofurol, N-methyl pyrrolidone, and mixtures thereof; an oil mixture selected from a mixture of caprylic and capric triglycerides, a mixture of caprylic, capric and linoleic triglycerides, a mixture of caprylic, capric and succinic triglycerides, and a mixture of propylene glycol dicaprylate and propylene glycol dicaprate; and a sustained release member selected from benzyl benzoate, dihydrolipoic acid, benzyl alcohol and lipoic acid. The fulvestrant-containing compositions have less than about 5% total impurities, on a normalized peak area response (“PAR”) basis as determined by high performance liquid chromatography (“HPLC”) at a wavelength of 223 nm, after at least about 24 months of storage at a temperature of from about 5° C. to about 25° C.

The invention discloses a low-temperature combined collector for flotation and desilicication of iron ore and application of the low-temperature combined collector, and belongs to the technical field of iron ore flotation. The combined collecting agent is an anion combined collecting agent and is prepared from three components, the component 1 is sodium oleate, the component 2 is sodium linoleate, the component 3 is sodium caprate, the component 1, the component 2 and the component 3 are prepared into aqueous solutions with the mass concentration being 5% respectively, the proportion of the aqueous solutions of the component 1, the component 2 and the component 3 is adjusted, the aqueous solutions of the component 1, the component 2 and the component 3 are mixed to be uniform, and the low-temperature type iron ore flotation desilicication combined collecting agent is obtained. The combined collecting agent is used for reverse flotation desilicication of refractory iron ore at the low temperature of 10-15 DEG C. According to the combined collecting agent, the defect that a traditional anion collecting agent is poor in collecting capacity under the low-temperature condition is overcome, the ore pulp temperature needed by iron ore reverse flotation desilicication is reduced (heating is not needed), the energy consumption of a dressing plant is effectively reduced, and the combined collecting agent is wide in component source, convenient to commercially obtain, low in cost and beneficial to industrial application and popularization.

The invention discloses a method for preparing the ginsenoside preparation by biological engineering technology, wherein the ginsenoside preparation comprises at least one of the saponin-enriched preparation and the saponin-enriched syrup; the compound bio-enzyme preparation prepared by the combined bacteria preparation of yeast and lactic acid bacteria provided by the invention is rich in amino acid residues, amides, coenzymes and active groups such as lactic acid and linoleic acid; and the ginsenoside preparations containing ginsenosides can be prepared by adding monosaccharides or polysaccharides to the compound bio-enzyme preparations, providing new directions and ideas for obtaining ginsenosides and their products.

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 present invention relates to a fat composition comprising at least 30 wt% of stearic acid (C18:0) and at least 45 wt% of saturated fatty acids (SAFA); and wherein the fat composition comprises 1.0 to 8.0 wt% of SSS triglycerides and at most 10.0 wt% of UUU triglycerides, and the weight ratio of S2U triglycerides to SSS triglycerides of the fat composition is 6.0 to 20.0 and the weight ratio of S2O triglycerides to S2L triglycerides is at most 30.0; wherein S is a saturated fatty acid, U is an unsaturated fatty acid, O is oleic acid and L is linoleic acid. The present invention further relates to a fat blend comprising the fat composition as hard stock, wherein the fat blend is further used in a water-in-oil emulsion product, such as a margarine or a spread.

The invention provides an application of ginseng oil body in preparation of a medicine for preventing and / or treating colitis, and belongs to the technical field of ginseng seed oil. The detection shows that the oil core structure of the ginseng oil body mainly consists of oleic acid and linoleic acid, and is different from the triglyceride core of the oil body obtained from the existing oil crops. Through lipidomics detection and analysis, the phospholipid monomolecular layer has 335 phospholipids (positive ion mode) and 269 phospholipids (negative ion mode). Through proteomics detection and analysis, 24 kinds of Panax proteins are identified. The condition that the oil core of the ginseng oil body contains protopanaxatriol (PPT) is identified through high performance liquid chromatography-high resolution mass spectrometry. In-vitro detection shows that the ginseng oil body has anti-inflammatory and anti-oxidation effects.

This invention discloses a combined collector for low-temperature iron ore flotation desilication and its application, belonging to the field of iron ore flotation technology. The combined collector of this invention is an anionic combined collector, composed of three components: component 1 is sodium oleate, component 2 is sodium linoleate, and component 3 is sodium decanoate. Components 1, 2, and 3 are each prepared into 5% (w / w) aqueous solutions. The ratio of the aqueous solutions of components 1, 2, and 3 is adjusted and mixed evenly to obtain the combined collector for low-temperature iron ore flotation desilication. This combined collector is used for reverse flotation desilication of difficult-to-process iron ores under low-temperature conditions (10℃-15℃). This combined collector overcomes the shortcomings of traditional anionic collectors, which have poor collection ability under low-temperature conditions. It reduces the pulp temperature required for reverse flotation desilication of iron ore (no heating required), effectively reducing the energy consumption of the concentrator. Furthermore, the components of the combined collector are widely available, commercially accessible, and low in cost, which is conducive to industrial-scale promotion and application.