816 results about "Petroleum ether" patented technology

The invention relates to the technical field of preparation of polymer oil-water separation membranes, in particular to a preparation method, a product and application of a hydrophilic PLA oil-water separation membrane. The preparation method of the hydrophilic PLA oil-water separation membrane comprises the following steps: dissolving polylactic acid in an organic solvent to obtain a spinning solution; carrying out electrostatic spinning on the spinning solution to prepare a PLA nanofiber membrane; the PLA nanofiber membrane is soaked in a dopamine hydrochloride solution, then membrane cloth is taken out, washed and dried, and the hydrophilic PLA oil-water separation membrane is obtained. The preparation method is low in cost and simple in preparation process. The PLA (at) PDA nanofiber membrane prepared by the preparation method disclosed by the invention is relatively high in oil-in-water emulsion separation efficiency and relatively high in separation rate, and has a good separation effect on n-hexane, gasoline, petroleum ether, peanut oil and the like, and the separation efficiency can reach 98% or above. The PLA (at) PDA nanofiber membrane disclosed by the invention is simple and convenient to apply and does not cause secondary pollution.

The invention discloses a method for preparing recombinant collagen antioxidant microspheres without a cross-linking agent. The method comprises the following steps: 1, dissolving recombinant collagen and chitosan in deionized water containing glacial acetic acid to serve as a water phase; petroleum ether containing a surfactant is used as an oil phase; 2, injecting the oil phase into the water phase, emulsifying and stirring through a homogenizer, and reducing the temperature of the system to obtain an emulsion; 3, a fixing agent, water and absolute ethyl alcohol are blended and precooled, and fixing liquid is obtained; 4, adding the stationary liquid into the emulsified liquid for curing, and washing the cured microspheres; and 5, transferring into a tannic acid aqueous solution to soak, then washing with deionized water, and freeze-drying to obtain the recombinant collagen microspheres with uniform size. The recombinant collagen microspheres prepared by the method have good dispersity and uniform and controllable size, avoid the toxicity problem of a cross-linking agent, can be applied to the fields of medical instruments, tissue engineering, drug delivery and the like as a filling agent, and have wide commercial application prospects.

A method for increasing the yield of an artemisinin crude product belongs to the technical field of artemisinin extraction, and comprises the following steps: an extraction step: adding artemisia apiacea leaves into a petroleum ether solvent, and extracting by combining heating stirring, ultrasonic waves or microwaves; a separation step: carrying out liquid-solid separation by adopting a filtering or centrifuging mode to obtain an artemisinin extracting solution containing artemisinin; a concentration step: evaporating and concentrating the artemisinin extracting solution to obtain an artemisinin concentrated solution; a crystallization step: putting the artemisinin concentrated solution into a crystallization tank for crystallization, and filtering after crystallization to obtain a mother solution and an artemisinin crude product; the crystallizing tank is a cold and hot crystallizing tank provided with a refrigerant ring cavity and a heating medium ring cavity at the same time, the artemisinin extracting solution on the upper portion can be rapidly cooled, meanwhile, the artemisinin extracting solution on the lower portion is kept at the constant temperature, impurities attached to low-temperature crystals can be reduced, the crystallizing speed is increased, and the crystallizing recovery rate of the artemisinin crude product is increased.

The invention discloses a high-dosage RAP recycled asphalt mixture and a preparation method thereof, and the method comprises the following steps: step 1, carrying out homogenization treatment on an epoxy resin system and a rubber-asphalt composite system according to a weight ratio of 1: 5-1: 30 to obtain a composite modified asphalt system; 2, preheating the waste asphalt pavement material to 110-130 DEG C, performing dry mixing, adding a petroleum ether regenerant, heating to 150-170 DEG C, and performing dry mixing again to obtain a mixture 1; step 3, preheating new fine aggregate, coarse aggregate and steel slag in batches, adding into the mixture 1, and carrying out dry mixing to obtain a mixture 2 with a primary grading framework; step 4, adding the composite modified asphalt system prepared in the step 1 into the mixture 2, and performing wet mixing to obtain a mixture 3; and step 5, homogenizing the mixture 3 to finally obtain the target recycled asphalt mixture. The invention aims to realize high-mixing-amount recycling of the waste asphalt pavement material.

The invention provides a potentilla fruticosa extract for preventing and treating ovarian function decline as well as a preparation method and application of the potentilla fruticosa extract, and belongs to the field of traditional Chinese medicines. The preparation method comprises the following steps: crushing the potentilla fruticosa, adding an ethanol water solution, extracting, refluxing, filtering, and removing ethanol and water from filtrate to obtain a potentilla fruticosa crude extract; extracting the crude extract with petroleum ether, and removing the petroleum ether to obtain a refined product of the potentilla fruticosa; and carrying out spray drying on the refined product to obtain the potentilla fruticosa extract. The extract prepared by the method is stable in physical property, easy to store and transport, simple in preparation process and convenient to operate; meanwhile, in the production process, no 1-3 types of organic solvents are used, so that the method is green, environment-friendly and good in safety. The potentilla fruticosa extract has a good effect of preventing and treating ovarian function decline.

The invention discloses a polycyclic polyisopentenyl phloroglucinol compound as well as a preparation method and application thereof, and belongs to the technical field of biological medicines. The method comprises the following steps: by taking a dry overground part of hypericum monogynum as a raw material, performing percolation extraction and concentration to obtain an extract, suspending the extract in water to obtain a suspension, and performing extraction and concentration to obtain a petroleum ether part extract; the extract is taken and subjected to separation through a positive and negative phase silica gel column, MCI medium-pressure column chromatography and Sephadex LH-20 gel column chromatography and purification through high performance liquid chromatography, the polycyclic polyisopentenyl phloroglucinol compound is prepared, and the structure and configuration of the compound are determined by means of a spectrum analysis technology, quantum chemistry calculation, X-ray single crystal diffraction and the like. The compound can inhibit TNF-alpha protein to play an immunosuppressive role, and can be used as an immunosuppressive drug.

The invention discloses a cleaning lubricant for textile machinery. The cleaning lubricant comprises the following components in percentage by weight: 6-14% of petroleum ether, 16-26% of solvent oil, 6-14% of alkane oil, 16-26% of 120 # solvent oil, 31-39% of butane gas and 1-9% of dimethyl silicone oil. The invention belongs to the technical field of textile, and particularly relates to a cleaning lubricant for textile machinery, which can clean greasy dirt and dirt on each movable part of a textile mill, a blowing workshop, a drawing workshop, a roving workshop and a spinning workshop. The cleaning lubricant has the technical effects of rust removal, lubrication, rust prevention, wear resistance and non-sticking to all movable parts during cleaning, and the lubricating period of the cleaning lubricant is long.

The invention provides a coal chemical industry wastewater deoiling extraction agent and a preparation method and application thereof, and the coal chemical industry wastewater deoiling extraction agent comprises at least one of petroleum ether, aromatic hydrocarbon compounds and acid ester organic compounds. According to the coal chemical industry wastewater deoiling extraction agent, at least one of petroleum ether, aromatic hydrocarbon compounds and acid ester organic compounds serves as the extraction agent, the extraction capacity of physical extraction is high, the coal chemical industry wastewater deoiling extraction agent has the deoiling and dust removal functions when being used for treating coal chemical industry wastewater, and efficient treatment of oil dust in wastewater can be achieved; secondary pollution such as oily sludge and scum is not generated; meanwhile, the extractant is good in regeneration performance and high in recovery rate, and has the advantage of being repeatedly used after being regenerated; in addition, raw materials such as acid ester organic matters are low in price, safe, stable, wide in source and small in corrosion to equipment, so that the maintenance cost of the equipment is reduced, and the wastewater treatment cost is reduced to the greatest extent.

The invention relates to the technical field of ferula asafetida endophytic fungus strain separation and purification, in particular to an alkaloid component in pleurotus nebrodensis as well as a preparation method and application thereof, and the alkaloid component in pleurotus nebrodensis, namely an alkaloid compound in pleurotus nebrodensis, is prepared by the following steps: crushing pleurotus nebrodensis sporocarp, adding methanol, heating, refluxing and extracting; dispersing the pleurotus nebrodensis total extract into a suspension with water, and extracting to obtain a petroleum ether part and ethyl acetate part extract; and carrying out gradient elution on the ethyl acetate part extract by silica gel column chromatography, and separating and purifying the third fraction by high performance liquid chromatography to obtain the alkaloid compounds in pleurotus nebrodensis. The invention discloses the alkaloid component in the pleurotus nebrodensis, namely the pleurotus nebrodensis alkali C for the first time, and the pleurotus nebrodensis alkali C has a certain inhibition effect on HGC-27 cells, so that the alkaloid component in the pleurotus nebrodensis, namely the pleurotus nebrodensis alkali C, can be applied to the preparation of tumor prevention drugs and antitumor drugs.

The invention belongs to the technical field of daily chemical products, and particularly relates to a gardenia extract as well as a preparation method and application thereof. The preparation method comprises the following steps: mixing cape jasmine powder (cape jasmine pollen or cape jasmine fruit powder) with an extraction solvent (water or an alcohol solution), extracting to obtain a water extract or an alcohol extract, and sequentially extracting the alcohol extract by petroleum ether, dichloromethane, ethyl acetate and n-butyl alcohol to obtain the cape jasmine extract. A petroleum ether extract, a dichloromethane extract, an ethyl acetate extract, an n-butyl alcohol extract and a water extract are obtained respectively. The gardenia extract prepared by the invention has obvious anti-oxidation, moisturizing and anti-allergy effects, and a scientific basis is provided for subsequent development of daily chemical products with anti-oxidation, moisturizing and anti-allergy effects by utilizing gardenia.

The invention relates to the technical field of indole alkaloid compounds, in particular to indole pleurotus nebrodensis alkali A, a preparation method thereof and application of the indole pleurotus nebrodensis alkali A to preparation of drugs for preventing and resisting tumors. Pleurotus nebrodensis sporocarp is smashed, ethyl alcohol is added, heating reflux preparation and concentration are conducted, obtained pleurotus nebrodensis total extract is dispersed into suspension with water, and then the suspension is placed in a drying oven to be dried to obtain the indole pleurotus nebrodensis alkali A. The indole pleurotus nebrodensis alkali A is obtained. The method comprises the following steps: sequentially extracting with petroleum ether, dichloromethane and ethyl acetate, concentrating an extracting solution to obtain ethyl acetate part extract, carrying out gradient elution separation on the ethyl acetate part extract by silica gel column chromatography, carrying out gradient elution on the obtained third fraction by high performance liquid chromatography, purifying and separating, and collecting eluate to obtain the indole pleurotus nebrodensis alkali A at 16.3 minutes. The indole pleurotus nebrodensis alkali A is disclosed for the first time, and it is found through in-vitro antitumor pharmacodynamic experiments that the indole pleurotus nebrodensis alkali A has a certain inhibition effect on human HGC-27 gastric cancer cells, so that the indole pleurotus nebrodensis alkali A can be used for preparing drugs for preventing and resisting gastric cancer.

The invention discloses flame-retardant modified benzoxazine resin, and a preparation method of the flame-retardant modified benzoxazine resin comprises the following steps: blending a benzoxazine monomer with dihydric phenol which is used as a flame retardant and contains a boron acetal structure, and then curing the blend to obtain the flame-retardant modified benzoxazine resin, the preparation method of the dihydric phenol containing the boron acetal structure comprises the following steps: adding hydroxyphenylboronic acid, pentaerythritol and a water-carrying agent into a reaction container, adding an organic solvent, carrying out a stirring reaction at 80-100 DEG C for 4-8 h, and after the reaction is finished, carrying out rotary evaporation and drying to obtain the dihydric phenol, the water-carrying agent is any one of petroleum ether, benzene, cyclohexane and chloroform. The blending method of the benzoxazine monomer and the dihydric phenol is solution blending or melt blending, and the curing method is thermocuring or catalytic curing. The boron acetal structure in the used flame retardant can generate a condensed phase flame retardant and gas phase flame retardant synergistic effect, so that the flame retardant property of the benzoxazine resin reaches UL94V-0 level, and the boron acetal structure can promote char formation and improve the carbon residue rate of the benzoxazine resin.

The preparation method comprises the following steps: crushing epimedium sagittatum to prepare paste, suspending with water, extracting with petroleum ether, dichloromethane, ethyl acetate and n-butyl alcohol respectively to obtain extractum of each part, carrying out gradient elution separation by using silica gel column chromatography, and concentrating to obtain the isopentenyl flavone compound extracted from epimedium sagittatum, thereby obtaining the isopentenyl flavone compound extracted from epimedium sagittatum. Combining the similar parts according to a thin layer chromatography (TLC) color development result to obtain a plurality of polar segments; carrying out chromatography and gradient elution on the target polar section to obtain a plurality of components, and then combining the similar components through thin-layer chromatography (TLC) dot plate absorption to obtain a plurality of sub-components; a target component is eluted and purified, fractions with different retention times are collected and dried, and two compounds are respectively obtained, have a remarkable inhibition effect on the cell viability of human breast cancer cells MCF-7, have anti-breast cancer activity, can be applied to preparation of drugs for treating breast cancer, and have huge social and economic benefits.

The invention discloses a preparation method of 4-(acetoxy) phenyl-2-methyl-2-acrylate, which takes mild DMAP as a reaction catalyst, produced phenolic ester is not easy to hydrolyze due to weak alkalinity, and the dripping speed and the reaction temperature are controlled at the same time, so that simultaneous esterification of two hydroxyls of hydroquinone can be effectively avoided, and the yield of 4-(acetoxy) phenyl-2-methyl-2-acrylate is improved. And generation of by-products can be reduced. According to the method, the ethyl acetate and petroleum ether mixed solvent with the ratio of 1: 2 is adopted for recrystallization, hot filtration operation is carried out, insoluble substances are by-products, solids separated out after filtrate is cooled are target products, operation is simple, high-yield target product powder solids can be directly obtained, and the purity can reach 80% or above. The method is simple and rapid in process, short in production period, low in production cost, high in total yield of target products and suitable for industrial production.

The invention discloses a preparation method of a self-cooling and self-cleaning nano coating for photovoltaic glass, and belongs to the technical field of preparation of self-cleaning coatings. Preparing a plant solution from ficus pandurata and ficus elastica; the preparation method comprises the following steps: mixing titanium dioxide and antimony oxide to prepare titanium dioxide-antimony oxide composite nanoparticles, and uniformly mixing the titanium dioxide-antimony oxide composite nanoparticles with petroleum ether, titanium phosphate, potassium permanganate and sodium peroxide to obtain a first solvent; preparing hollow silicon dioxide-stannic oxide composite nanoparticles from hollow silicon dioxide and stannic oxide, and uniformly mixing the hollow silicon dioxide-stannic oxide composite nanoparticles with acetone, sodium bicarbonate and ethanol to obtain a second solvent; and uniformly mixing the first solvent and the second solvent, adding isopropanol and deionized water, and uniformly stirring with the plant solution and the binder to obtain the self-cleaning nano coating liquid. The material of the nano-coating has the characteristics of high surface energy, high chemical activity, small size effect and the like, so that the nano-coating makes very sensitive response to physical environments such as light, heat, electricity and the like, and the self-cleaning effect is achieved.

The invention discloses a method for green and efficient extraction of functional components in spina date seeds. The method comprises the following steps: crushing spina date seeds, removing seed coats and endosperm, deoiling cotyledons with petroleum ether, performing low-temperature water extraction on peeled and deoiled spina date seed powder, filtering and clarifying extract liquid with a hollow fiber membrane or a ceramic membrane, performing reverse osmosis concentration to remove most of water, and drying concentrated liquid to obtain the spina date seed extract highly enriched with functional components. In the extraction process, petroleum ether is used in the deoiling part, only water is used in the other steps, no solvent with obvious toxicity and pollution is used in the whole extraction method, the method has the advantages of safety, environmental protection, simple process, low cost, good extraction effect and the like, and the obtained extract is green and safe, can be directly used in the fields of medicines, foods and the like, and has wide application prospects. And by-products such as seed coats and endosperm of spina date seeds, extracted spina date seed oil and spina date seed starch and protein settled at the bottom after extraction can be further utilized and developed, so that more additional values are created for enterprises.

The invention discloses colloid, porous carbon and a preparation method and application thereof. The preparation method of the colloid comprises the following steps: S1, extracting aromatic hydrocarbon-rich oil by adopting a first solvent to obtain a soluble component which is a component A; wherein the first solvent is selected from one or more of o-dichlorobenzene, dipropyl ether and 3-pentanone; s2, the component A is adsorbed to an aluminum oxide chromatographic column, petroleum ether or n-heptane, methylbenzene and a second solvent are sequentially adopted to wash the chromatographic column, then desorbed matter is obtained, and the second solvent is a mixture of methylbenzene and ethyl alcohol. The colloidal pyrrole is high in nitrogen content, and the porous carbon prepared from the colloidal pyrrole is excellent in conductivity.

The preparation method of the flavone enantiomer compound comprises the following steps: crushing epimedium sagittatum to prepare paste, suspending with water, extracting with petroleum ether, dichloromethane, ethyl acetate and n-butyl alcohol respectively to obtain extractum of each part, carrying out gradient elution separation by using silica gel column chromatography, and concentrating to obtain the flavone enantiomer compound extracted from epimedium sagittatum. Combining the similar parts according to a thin layer chromatography (TLC) color development result to obtain a plurality of polar segments; carrying out chromatography and gradient elution on the target polar section to obtain a plurality of components, and then combining the similar components through thin-layer chromatography (TLC) dot plate absorption to obtain a plurality of sub-components; a target component is eluted and purified, fractions with different retention times are collected and dried, and four compounds are obtained respectively, have a remarkable inhibition effect on the cell viability of human breast cancer cells MCF-7, have anti-breast cancer activity, can be applied to preparation of drugs for treating breast cancer, and have huge social and economic benefits.

The invention discloses a thin-layer chromatography rapid identification method for vigor-preserving decoction particles, and aims to solve the problems of complicated operation, more interference, low efficiency and the like of the existing method. According to the method, a test solution is prepared through methanol extraction and water-saturated n-butyl alcohol and ammonia test solution extraction, reference medicinal materials and seven reference solutions are matched, a petroleum ether-ethyl acetate-methanol-formic acid mixed solution is adopted as a developing solvent, and inspection is conducted after developing is conducted through a silica gel H thin-layer plate. The method can be used for accurately identifying seven key components in the vitality-preserving decoction granules at one time, is high in specificity, simple and convenient to operate, environment-friendly and high in efficiency, and provides rapid and reliable technical support for quality control of the vitality-preserving decoction granules.

The preparation method of the isopentenyl flavone enantiomer compound comprises the following steps: crushing epimedium sagittatum to prepare paste, suspending with water, respectively extracting with petroleum ether, dichloromethane, ethyl acetate and n-butyl alcohol to obtain extractum of each part, carrying out gradient elution separation by using silica gel column chromatography, and concentrating to obtain the isopentenyl flavone enantiomer compound, namely the isopentenyl flavone enantiomer compound. Combining the similar parts according to a thin layer chromatography (TLC) color development result to obtain a plurality of polar segments; carrying out chromatography and gradient elution on the target polar section to obtain a plurality of components, and then combining the similar components through thin-layer chromatography (TLC) dot plate absorption to obtain a plurality of sub-components; a target component is eluted and purified, fractions with different retention times are collected and dried, and four compounds are obtained respectively, have a remarkable inhibition effect on the cell viability of human breast cancer cells MCF-7, have anti-breast cancer activity, can be applied to preparation of drugs for treating breast cancer, and have huge social and economic benefits.

Disclosed are an aqueous American ginseng extract, a method for preparing, and use thereof in reducing uric acid. The method comprises the following steps: grinding American ginseng, mixing with petroleum ether, and subjecting the mixture to ultrasonic extraction and filtration at reduced pressure; drying the defatted American ginseng powder and mixing with deionized water, and subjecting the mixture to another ultrasonic extraction and filtration at reduced pressure to give an aqueous American ginseng extract solution; and concentrating and lyophilizing the aqueous American ginseng extract solution to give the aqueous American ginseng extract. The resultant aqueous American ginseng extract can effectively reduce the activity of xanthine oxidase and adenosine deaminase, lower the blood uric acid level, and provide certain protective effects on the kidneys, thus possessing good development prospects.

The present invention provides a FeNiHo / carbon nanofiber composite absorber and a preparation method thereof, an absorbent material and a preparation method thereof, and belongs to the technical field of electromagnetic wave absorbing materials. The present invention first mixes iron salt, nickel salt, holmium salt and polyvinyl pyrrolidone in a mixed solvent, and electrostatically spins the obtained spinning precursor solution to obtain a nanofiber membrane; the nanofiber membrane is sequentially subjected to pre-oxidation treatment and carbonization treatment to obtain a FeNiHo / carbon nanofiber composite absorber. The FeNiHo / carbon nanofiber composite absorber, paraffin and petroleum ether are mixed, and then pressed and irradiated with ultraviolet light to obtain an absorbing material. The FeNiHo alloy nanoparticles in the composite absorber improve the impedance matching performance and electromagnetic wave attenuation ability of the carbon nanofiber. The obtained absorbing material can achieve the purpose of real-time adjustment of the absorption frequency by irradiation with ultraviolet light.

The invention discloses a method for extracting and separating cembratriene glycol by using a deep eutectic solvent. The method comprises the following steps: synthesizing a deep eutectic solvent by selecting choline chloride as a hydrogen bond donor and propylene glycol as a hydrogen bond receptor, putting the tobacco inflorescence into the deep eutectic solvent for extraction, filtering after extraction, adding petroleum ether into a DES extracting solution, recovering a petroleum ether layer after extraction, carrying out reduced pressure distillation to dryness, adding acetonitrile for dissolving, and filtering to obtain the tobacco inflorescence. Two isomers of cembratriene glycol are separated by preparative chromatography to obtain two monomeric compounds with high purity. The technological process is simple, a large number of purification steps are not needed, the solvent is convenient to recycle, the purity is high, and the method is suitable for large-scale industrial production and has very high use value.

The present invention relates to the technical field of oilfield chemistry, and is a dissolving agent for colloid blockages in oil well bores and a preparation method thereof, wherein the raw materials of the former include, by mass percentage, 45% to 60% of a main agent, 10% to 20% of a penetrant, 1% to 5% of EVA, 5% to 10% of a surfactant, and 10% to 15% of a mutual solvent; wherein the main agent is a mixture of dipentene, petroleum ether, and straight-chain alkanes. The present invention provides a dissolving agent for colloid blockages in oil well bores with dipentene, petroleum ether, and straight-chain alkanes as main dissolving agents, which can effectively remove high-content colloid blockages in the bores, and achieve the purpose of efficiently and thoroughly removing mixed blockages in the bores, and the preparation method thereof is convenient to manufacture and operate, and is convenient for production and on-site promotion and application.

The invention provides a preparation method of diphenyl ethyoxyl phosphine and a product thereof. Taking diphenyl phosphonium chloride and absolute ethyl alcohol as raw materials, petroleum ether as a solvent and triethylamine as an acid-binding agent; the reaction process comprises the following steps: reacting diphenyl phosphine chloride with ethanol to generate diphenyl ethyoxyl phosphine and hydrogen chloride, and reacting hydrogen chloride with triethylamine to generate triethylamine hydrochloride. And after the reaction is finished, separating triethylamine hydrochloride separated by crystallization from the liquid organic phase through centrifugation, taking the obtained triethylamine hydrochloride as a co-product, carrying out desolvation treatment on the obtained liquid organic phase to obtain a diphenylethoxyphosphine crude product, and rectifying to obtain the high-quality diphenylethoxyphosphine. The preparation process provided by the invention is mild in reaction condition, simple and convenient to operate and low in requirements on equipment and energy consumption; the raw materials are wide in source and low in cost, and the solvent and the acid-binding agent can be recycled, so that the method has the advantage of environmental protection. The prepared diphenyl ethyoxyl phosphine is high in purity and good in yield, and has a wide industrial application prospect.

The invention discloses a broussonetia papyrifera source ecological pesticide or growth promoting agent and a preparation process thereof.The broussonetia papyrifera leaf extract is prepared from broussonetia papyrifera leaves, ethyl alcohol, dichloromethane, ethyl acetate and n-butyl alcohol, and the preparation process of the broussonetia papyrifera source ecological pesticide or growth promoting agent comprises the following steps that broussonetia papyrifera leaf raw materials are prepared; extracting a paper mulberry leaf raw material by using alcohol, adding petroleum ether to extract the solution collected in the step 2, collecting the obtained solution, adding dichloromethane to the solution collected in the step 3, adding ethyl acetate to the solution collected in the step 4, adding n-butyl alcohol to the solution collected in the step 5, collecting the obtained extract, and drying to obtain the paper mulberry leaf extract. Purifying the final extract of the broussonetia papyrifera leaves to prepare a pesticide or a growth promoting agent. According to the tree source ecological pesticide or the growth promoting agent and the preparation process thereof, the pesticide or the growth promoting agent is prepared from the extracts of the paper mulberry leaves, so that the germination of appressorium of pyricularia grisea spores of rice blast can be inhibited, the effect of promoting the growth of rice is achieved, and the yield of the rice is increased.

The embodiment of the invention relates to the technical field of insulating adhesives, and discloses an insulating sealing coating adhesive which comprises 60-80 parts of a modified styrene-butadiene-styrene block copolymer, 0.3-1 part of a ketimine curing agent, 2-8 parts of an aromatic amine curing agent, 3-8 parts of methyl silicone oil and 12-26 parts of petroleum ether, wherein the modified styrene-butadiene-styrene block copolymer is obtained by epoxidation of a styrene-butadiene-styrene block copolymer (SBS), the molecular weight of the styrene-butadiene-styrene block copolymer is 7000-11000, the substance amount fraction of a PB end (polybutadiene chain segment) is 70-85%, and the ratio of a branched chain structure to a straight chain structure in the PB end is 1: 2-1: 3. The insulation sealing coating adhesive has the characteristics of high reliability and uniform coating in multiple axial directions, especially in the vertical direction (namely the z-axis direction) through the structural characteristics of the insulation sealing coating adhesive and the compounding of the insulation sealing coating adhesive and a multi-element curing agent, is convenient to spray and is beneficial to application to precise components.

The invention provides a botanical fungicide of a chaulmoogra seed extract, which takes sub-chaulmoogra seed oleic acid as a marker, and application of the botanical fungicide in preparation of medicines for preventing and treating plant diseases caused by pathogenic fungi and oomycetes. The hydnocarpus anthelmintica extract is obtained by extracting hydnocarpus anthelmintica seeds with a plurality of different types of organic solvents such as ethanol, petroleum ether and the like and treating the seeds by a physical method, and the hydnocarpus anthelmintica extract contains sub-hydnocarpus anthelmintica oleic acid as markers in different proportions. The extract has the effects of inhibiting conidium germination, bud tube growth or appressorium formation of fungi and oomycetes, effectively preventing pathogenic bacteria from infecting host plants and preventing and treating important plant diseases such as rice blast, mango anthracnose, potato late blight and rice false smut.

A method for extracting flavonoid compounds from epimedium sagittatum comprises the following steps: crushing epimedium sagittatum, carrying out reflux extraction, carrying out reduced pressure recovery to obtain an extract, suspending with distilled water, and extracting with petroleum ether, dichloromethane, ethyl acetate and n-butyl alcohol at room temperature to respectively obtain each part; the dichloromethane part is separated, eluted and combined, and components Fr.A, Fr.B, Fr.C, Fr.D, Fr.E, Fr.F, Fr.G and Fr.H are obtained; eluting the component Fr.G, and combining to obtain components Fr.G1,..., Fr.G17 and Fr.G18; eluting the component Fr.G17, and combining the eluted component Fr.G17 to obtain components Fr.G 17.1,..., Fr.G 17.15,..., Fr.G 17.19; eluting a component Fr.G 17.15, recovering under reduced pressure, and merging to obtain components Fr.G 17.15. 1,..., Fr.G 17.15. 9, Fr.G 17.15. 10,..., Fr.G 17.15. 12; the preparation method comprises the following steps: carrying out semi-preparative HPLC (High Performance Liquid Chromatography) purification on the component Fr.G 17.15. 10 to obtain a compound Epimesatine P; the preparation method comprises the following steps: carrying out semi-preparative HPLC (High Performance Liquid Chromatography) purification on a component Fr.G 17.15. 9, and collecting components with different retention times, so as to respectively obtain the compounds Epimesatine Q, Epimesatine R and Epimesatine S. The preparation method comprises the following steps of: preparing the compound Fr.G 17.15. 9; the flavonoid compound can be effectively extracted from epimedium sagittatum, can be effectively used for treating breast cancer, can be applied to preparation of anti-breast cancer drugs, and has remarkable economic and social benefits.

The invention relates to the technical field of sealants, in particular to UV (ultraviolet) curing type liquid ethylene propylene diene monomer applied to a battery sealant and a preparation method of the UV curing type liquid ethylene propylene diene monomer, and the UV curing type liquid ethylene propylene diene monomer comprises the following components in parts by weight: 20-30 parts of liquid ethylene propylene diene monomer, 20-30 parts of petroleum ether, 0.2-1 part of sulfydryl-1, 2-propylene glycol, 0.05-0.5 part of an initiator, 20-30 parts of acetone, isocyanate ethyl acrylate and 0.1-0.2 part of a catalyst. And 0.1 to 0.2 part of a polymerization inhibitor. Liquid ethylene propylene diene monomer containing 10% of a third monomer is used as a raw material for modification, and a photocuring group is grafted to a molecular side chain of the liquid ethylene propylene diene monomer through a thiol-ene click reaction and an addition reaction of isocyanate, so that after the battery sealant is prepared, a rapid curing effect can be realized through LED irradiation at a dispensing position, and the service life of the battery sealant is prolonged. Therefore, the production speed is increased and the production cost is reduced.