6129 results about "Petroleum ether" patented technology

The invention discloses a super-hydrophobic and super-oleophylic oil-water separating mesh membrane and a preparation method thereof. The method comprises the following steps of: (1), cleaning a fabric mesh and drying the cleaned fabric mesh; (2), dissolving dopamine hydrochloride and trihytdroxy methyl-aminomethane to water to acquire a mixed solution, wherein the pH value of the mixed solution is 8.0-12.0; (3), soaking the dried fabric mesh in the mixed solution, and then getting out the soaked fabric mesh for drying; (4), dissolving mercaptan compound and sodium hydroxide in water to acquire mixed turbid liquid; (5), soaking the fabric mesh acquired in the step (3) in the mixed turbid liquid, reacting the mixture to acquire the oil-water separating mesh membrane. The oil-water separating mesh membrane disclosed by the invention has high bearing pressure to water so that oil can quickly pass, a separating effect is good, the speed is high, and the separating effect on normal hexane, petroleum ether, benzene, gasoline, diesel oil, animal and vegetable oil, crude oil and the like is good. The oil-water separating mesh membrane is non-toxic and harmless, environment-friendly, easy to clean and keep, can be reusable, and has good stability.

The invention relates to a method for purifying sesamin and sesamolin in sesame oil, which comprises the steps of: separating lignanoid compounds without fat constituents from the sesame oil first; adding ether into the lignanoid compounds to precipitate the sesamin; performing the filtration; dissolving an obtained filtrate by chloroform after concentration under reduced pressure, adding petroleum ether into the mixture until white opacity appears; heating and dissolving the obtained solution; and standing the obtained solution to precipitate the sesamolin. The method for purifying the sesamin and the sesamolin has the advantages of simple operation, safety, economization, strong process stability and the like, and is particularly suitable for industrialized application; and the method can synchronously obtain high-purity sesamin and sesamolin, and achieve the aim of comprehensive utilization.

A fuel additive for middle distillate fuels is a mixture of at least one methyl, ethyl, propyl or butyl ester of a vegetable oil or a C₁₆-C₁₈ fatty acid, at least one alkyl ether of propylene glycol, a surfactant, and an antioxidant. A fuel additive for gasoline is a mixture of ligroin or toluene/xylene, at least one alkyl ether of propylene glycol, a surfactant, and tertiary amyl methyl ether.

The invention discloses a method for preparing a spherical powder material used for three-dimensional printing. The method includes the steps of raw material selecting, high-energy ball milling and radio-frequency plasma spherizing. Selected raw materials are metal or alloy powder in the step of raw material selecting; the step of high-energy ball milling is carried out under the argon shielding condition, petroleum ether serves as the ball milling medium, and the metal or alloy powder is aluminum alloy powder, or titanium alloy powder, or nickel-base alloy powder, or stainless steel powder or tungsten alloy powder; according to the step of radio-frequency plasma spherizing, the total gas flow is 100 L/min-200 L/min, the input power of plasma is 50 kW-100 kW, the negative pressure of a gas outlet of a system is minus 1000 Pa-minus 2000 Pa, and the powder conveying amount is 50 g/min-150 g/min. The manufactured spherical powder is high in sphericity degree, even in granularity, low in oxygen content and good in liquidity, has few defects and is suitable for three-dimensional printing. The method for preparing the spherical powder material used for three-dimensional printing has the advantage that the process is accurate and controllable.

The invention discloses a composite phase-change energy storage material for microcapsules and a preparation method thereof. The coating of the microcapsule is made of silicon dioxide, and the core of the microcapsule is made of a phase-change energy storage material, wherein the phase-change energy storage material is a paraffin organic solid-liquid phase-change energy storage material. 0.2 to 0.5 wt.% of dispersed emulsifier, 52.5 to 62.5 wt.% of solvent water, 18.75 to 31.5 wt.% of phase-change energy storage material and 15.5 to 18.75 wt.% of inorganic silica source are matched and put into a reactor for stirring for 5 to 8 hours; the mixture is uniformly dispersed and emulsified at the temperature 3 to 8 DEG C higher than that for solid-liquid phase change; hydrochloric acid aqueous solution catalyst with the pH value of 0.93 to 4.07 or sodium hydroxide aqueous solution catalyst with the pH value of 8.0 to 12.0 is added into the emulsion; the reacting solution is naturally cooled to room temperature and precipitation solution is obtained; the precipitate is washed with the combination of water and petroleum ether, wherein the mass percent of the petroleum ether is 30 wt.%; then the precipitate is washed with deionized water and is filtered, and the product is naturally aired. The invention improves the technology of phase-change energy storage and conservation, and has the function of automatic temperature regulation, favorable physical and chemical stability, crack resistance, flame retardancy, wear resistance and high thermal conductivity.

The invention discloses an underwater super-oleophobic oil-water separation mesh membrane and a preparation method thereof. The oil-water separation mesh membrane is prepared by coating a micron-thickness chitosan-based polymer coating layer on the mesh wire of a fabric mesh with 100-400 meshes. The oil-water separation mesh membrane is provided with micrometer-scale meshes and the chitosan-based polymer coating layer is provided with protruding structures with a nanoscale width. The preparation method of the oil-water separation mesh membrane comprises the following steps of: (1) cleaning and drying the fabric mesh; (2) dissolving a chitosan-based polymer in acid solution and stirring evenly to obtain mixed solution; (3) immersing the cleaned and dried fabric mesh in the mixed solution, taking out and drying the fabric mesh; and (4) immersing the fabric mesh obtained by the step (3) in alkaline solution, taking out and drying the fabric mesh to obtain the oil-water separation mesh membrane. The oil-water separation mesh membrane provided by the invention has the advantages of large water flux, high oil-water separation speed and good oil-water separation effect, is applicable to treatment of sewage with high oil content, and has good separation effect on normal hexane, petroleum ether, dichloroethane, benzene, animal and vegetable oils and the like.

The invention relates to a method for extracting suaeda salsa flavone and measuring content of flavone in suaeda salsa. The method comprises the following steps: 1), collecting the suaeda salsa, drying the suaeda salsa and crushing the suaeda salsa; with ethanol as an extractant, soaking the suadeda salsa and carrying out microwave-assisted extracting; filtering; extracting with petroleum ether; transferring the ethanol layer to a macroporous adsorption resin layer; and eluting with water and ethanol aqueous solution sequentially; collecting the eluant, and pressurizing and concentrating the eluant to obtain flavone compound extract; 2), with rutin as a contrast, preparing standard solution with different concentration gradients; measuring the chromatographic peak area at the wavelength of 360nm through a high efficiency liquid chromatography to form flavone content contrast reference; measuring the chromatographic peak area of the to-be-measured solution; obtaining the flavone content of the to-be-measured solution according to the flavone content contrast reference; and obtaining the content of the flavone in the suaeda salsa according to the dilution multiple of the to-be-measured solution. According to the method provided by the invention, soaking and microwave-assisted extracting are adopted to extract flavone, and the content of the flavone is measured by chromatography, so that the method is simple and the solvent is easily available. Besides, the obtained flavone is high in content, and has the physiological and pharmacological activities such as antiviral activity, antioxidant activity, anti-ageing activity and the like.

A high-content environmental-protecting alcohol ether fuel for vehicle consists of additives and methanol or alcohol 75-87 proportion. The additives contain methanol, alcohol, isopropyl alcohol, isobutanol, dimethylcuprate, n-amyl alkyl, dipropyl, cyclopentane, nitro-methane, dimethyl benzene, pinecone oil, cyclopentadienyl, poly-isobutylene, propane diamine, carbomethoxy formate, dimethoxyester carbonate, natural gasoline, hydrocarbon solvent oil, diisopropyl ester, dimethoxy-methane, petroleum ether, methyl tert-amyl ether, tert-amyl tert-butyl ether, lauryl phenol poly-ethenoxy ether, anti-static agent, metal-corrosive inhibitor, rubber plastic swelling inhibitor and anti-oxidant. It's clean and universal; it has excellent burning stability, shock resistance and dynamic character and less oil consumption.

The invention discloses a method for preparing total saponins and polysaccharides from Apios americana flowers simultaneously and relates to the technical field of plant extraction. The method comprises the following steps: (1) harvesting raw materials, cleaning and drying; (2) reflux-extracting with ethanol, and filtering to obtain a supernatant and filter residues; (3) defatting the supernatant with petroleum ether, extracting with n-butanol, performing adsorption and elution, concentrating, and drying to obtain powdery Apios americana flower saponins; (4) removing the solvent from the filter residues, reflux-extracting with water, filtering, collecting and mixing the filtrates; and (5) decolorizing the filtrate, performing deproteinization, concentrating, precipitating with alcohols, dialyzing and concentrating, and drying to obtain Apios americana flower polysaccharides. The method has the advantages of simple process, high yield and low cost. Besides, the total saponins and polysaccharides of Apios americana flowers are prepared simultaneously, have high purity and strong activity, and can be widely used in pharmaceuticals or functional foods with antioxidant and blood sugar regulating effects.

The present invention is the lutein crystal preparing process from marigold flower. Lutein ester is first extracted from marigold flower with non-polar solvent under heating condition and then saponified with alkali solution in stirring and heating condition; and the saponified product is diluted with deionized water and separated, washed and vacuum dried. After that, the obtained lutein crystal is re-crystallized in three-component solvent of tetrahydrofuran, deionized water and normal hexane or petroleum ether; and the lutein crystal is suction filtered, washed and vacuum dried. The present invention has low-toxicity solvent in small amount used, simple technological process, high extraction, rate, and high product purity. The product of the present invention may be used widely as feed coloring additive and food coloring agent and in medicine and health care article.

The invention discloses a super-hydrophobic/super-oleophilicity copper wire mesh for oil and water separation and a preparation method and application thereof. The preparation method comprises the steps that firstly, the copper wire mesh is ultrasonically cleaned through diluted hydrochloric acid, absolute ethyl alcohol and deionized water respectively and dried through nitrogen; chemical deposition liquid of copper sulfate and a sodium thiosulfate solution is prepared; the cleaned copper wire mesh is placed into the chemical deposition liquid for a deposition reaction; the copper wire mesh is taken out and cleaned through the deionized water and dried in the air; the dried copper wire mesh is placed in a solution of a curing agent and polydimethylsiloxane with hydroxyl sealed end, and the copper wire mesh is taken out and heated. No expensive fluorine-containing substance is needed, the copper wire mesh has the advantages that the preparation technology is simple, reaction conditions are mild, no strong acidity or strong basicity or corrosivity reagents are needed, and no harm is caused to the environment, separation of oily wastewater can be achieved rapidly and efficiently, the good separation effect on chloroform, normal hexane, petroleum ether, plant oil, diesel oil, aviation kerosene and the like is achieved, and separation of strong acidity, strong basicity and high salinity oily wastewater can be achieved.

The invention provides a method for improving the content and aromas of tobacco secondary metabolite products. During any tobacco plant growth period or after tobacco harvesting, a leaf surface spraying method, a stem top spraying method or a root-irrigation method is adopted to implement one or more of salicylic acid elicitors and/or jasmonic elicitors on the tobacco plants or the tobaccos so as to induce synthesis of the tobacco secondary metabolite products. The method can not only remarkably increase the content of tobacco essential oil, petroleum ether extract and glandular hair secreta and the like and improve tobacco aroma quality, but also improve yield of some important natural products in the tobacco such as solenesol and provide high-content raw materials for extraction of the natural products. Meanwhile, the method can activate tobacco plant immune system and improve insect resistance, disease resistance and stress resistance of the tobacco plants.

The invention discloses a production technique of andrographolide and neoandrographolide, dehydroanddrographolide and oxyandrographolide; the technique comprises the following steps of: firstly preparing stem and leaf extract of andrographis paniculata, removing fat-soluble impurities such as chlorophyll and the like with petroleum ether, and then hot-melting the extract in lower alcohol or aqueous lower alcohol, conducting reflux and decolorization with active carbon, separating out a majority of andrographolide crystals, then removing flavonoid through an alumina column or alkali cleaning, obtaining the andrographolide, cold-melting the andrographolide with trichloromethane or dichloromethane for 2 to 4 times, filtering and obtaining two parts of filtrate and insoluble substances, concentrating the filtrate, then conducting solvent crystallization and recrystallization or column chromatography for separation, and finally, respectively obtaining dehydroanddrographolide and pure product of andrographolide; the insoluble substances go through solvent crystallization and recrystallization or column chromatography for separation to obtain the neoandrographolide and pure product of andrographolide. The technique has simple production equipment, simplified routes and easy operation, can realize industrialized batch production; and the proportion of neoandrographolide, dehydroanddrographolide and oxyandrographolide in the obtained andrographolide is high, while the content of impurities is low. The obtained neoandrographolide, dehydroanddrographolide and oxyandrographolide all have monomer purity of higher than 98 percent, thus being capable of being used as chemical reference substance of the traditional Chinese medicine, or being applied as raw materials of medicine and chemical industry.

The invention discloses a nano-TiO2 loaded chitosan compound and a preparation method thereof. The preparation method comprises the following steps: mixing chitosan and a nano-TiO2 solution into water to obtain an aqueous phase mixture; taking petroleum ether/liquid petrolatum as an oil phase mixture; preparing nano-TiO2 loaded chitosan anti-bacterial micro-spheres according to the suspension-cross-linking technology. As the natural antibacterial agent chitosan is taken as a wall material, a metal ion-type antibacterial agent TiO2 is taken as a core material, and the compound antibacterial agent is prepared according to the suspension-cross-linking technology, the performance and the application range of the antibacterial agent can be greatly improved through the synergistic effect and advantage complementation of chitosan and TiO2. Furthermore, after being compounded, the novel antibacterial agent is high in performance, relatively wide in anti-bacterial range, and high in stability.

An extract of mulberry twigs is dislcosed, which can be used to prepare the food or the medicine to cure hyperuricemia and gout diseases. The said extract is prepared from mulberry twigs through extracting in solvent (aqueous solution of alcohol, chloroform, acetone, etc) at 10-100 deg.C more than one time, mergint the liquid extracts, recovering solvent, regulating pH value to 7.5-9.5, centrifugal separation to obtain supernatant, regulating pH value to 4-6, deposition, water washing wand drying. Several other approaches for purifying it are also disclosed.

The invention relates to a method for extracting chlorogenic acid, which belongs to the technical field of pharmaceutical chemicals. The method combines macroporous resin enrichment, ethyl acetate extraction and a mixed solvent split-phase method to achieve multi-step gradient purification of the chlorogenic acid so as to obtain a chlorogenic acid product with high purity. The method comprises the processes of water extraction, column passing, extraction, phase splitting and recrystallization. The macroporous resin adopted by the column passing process is 306 type or XAD series resin; and the split-phase agent adopted by the split-phase method is petroleum ether, chloroform or the mixture of the petroleum ether and the chloroform. The method is applicable to the process of extracting and preparing the chlorogenic acid from honeysuckles, cortex eucommiae leaves and cortex eucommiae barks.

The invention provides a process for extracting dendrobium polysaccharide and dendrobine from dendrobium officinale. The raw material used in the process comprises dendrobium officinale, cellulase (a biochemical reagent), glucose, phenol, acetone, petroleum ether and absolute ethyl alcohol. According to the process provided by the invention, the polysaccharide and dendrobine in the dendrobium officinale are extracted by using cellulase-catalyzed extraction in a combination manner; the dendrobine is obtained when the dendrobium polysaccharide is obtained; high efficiency for single extraction of the polysaccharide by an enzymic method is kept; the effects of effectively breaking cell walls are improved; dissolution of polysaccharide and the like are promoted; the process and condition are mild; the extraction rate is improved to a certain extent; and the economic benefits are relatively high.

The invention discloses a preparation method for a paraffin microcapsule phase-change material modified by graphene oxide. A technical scheme is that the preparation method comprises the following steps: adding concentrated acid and a strong oxidant in low-temperature ice-water bath to oxidize graphite; successively adding deionized water, hydrogen peroxide and hydrochloric acid, carrying out vacuum filtration, drying and grinding to obtain graphene oxide, adding the graphene oxide into the deionized water to prepare the graphene oxide liquor; adding paraffin, a non-ionic emulsifier and an ionic emulsifier into a stirring kettle, heating and adding graphite to stir to obtain paraffin emulsion; and adding an initiator into the paraffin emulsion to dissolve and dropwise adding monomers, carrying out vacuum filtration after the dropwise adding, carrying out petroleum ether washing and water washing, drying in vacuum and crushing to obtain paraffin microcapsule powder. The preparation method has the beneficial effect that the thermal stability, and the thermal conductivity of the paraffin microcapsule phase-change material are improved by virtue of reaction of multiple oxygen-containing groups on the graphite oxide and the polymer; and moreover, the paraffin microcapsule phase-change material is simple to prepare, environmentally friendly, and has market prospect in the fields such as building energy conservation, thermal insulation products and floor heating.

The invention provides a system from extracting lithium from salt lake brine, comprising ionic liquid, a co-extracting agent and a diluent; the ionic liquid is pyrrole hexafluorophosphate ionic liquid comprising lithium extraction functional groups, and the diluent is from solvent gasoline, sulfonated kerosene and petroleum ether. The use of the co-extracting agent iron trichloride is avoided in the lithium extraction system, adjusting pH of brine is not required, at least 5 tons of industrial hydrochloric acid and 2 tons of sodium hydroxide may be saved per ton of lithium chloride produced, and the production cost is greatly reduced; saponifying step, pickling step and deironing step are omitted from the technique, and therefore, the system is easier to use in industrial large-scale production.

The invention relates to a Chinese magnoliavine fruit monomer composition separation preparation method; ethanol extracts from Chinese magnoliavine fruit are extracted by petroleum ether, chromatography is carried out to the petroleum ether extracts by a silicagel column, and then the petroleum ether is eluted by petroleum ether-ethylacetate, and HPLC is used for monitoring, and then crude extract A and crude extract B are fraction-collected, and eluted; the volume ratio of eluant petroleum ether and ethylacetate is 3-5:1, the crude extract A and crude extract B are respectively applied to a high-speed counter-current chromatography for separation, so as to obtain SCHisanhenol, deoxyschizandrin, schizandrin B, schisandrin C, schizandrol A, schizandrol B and schisantherrin B monomers, and the purity is higher than 98 percent.

The invention discloses an extraction method of filament eucommia rubber from eucommia leaves and peel; the method uses petrol ether as solvent to extract the eucommia rubber and has the steps: first, the eucommia leaves or the peel is made into small pieces and added with NaOH solution to dissolve cuticle; then cellulase is added to hydrolyze cell wall; the petroleum ether solvent at 60 DEG C to 90 DEG C of boiling range is added; then the obtained solution is extracted through recirculation at the temperature of 85 DEG C and filtrated when being hot, then cooled and frozen; the filament eucommia rubber is produced after filtration. Concentration of the NaOH solution is 0.5 percent to 1.5 percent and the dissolution time is 6 hours; pH value of the cellulase used for hydrolyzing the cell wall is 4 at temperature of 50 DEG C; enzymatic hydrolysis time is 1 hour to 2 hours and the time for reflux extraction is 2 hours; the frozen time is 30 minutes to 60 minutes at temperature of minus 20 DEG C to 0 DEG C. The method can effectively and completely extract the eucommia rubber to make original eucommia rubber and keep the original biological characteristics and physical properties and status and the original molecular structure and polymerization of the eucommia rubber; the method uses the cellulose to extract pretreated eucommia leaves raw materials, and gets the eucommia rubber of high quality when getting high yield.

The present invention is fast detection method of aflatoxin B1 in food and feed. The fast detection method includes the following steps: adding ground sample to be tested in 2-10 g in test tube, adding methanol-sodium chloride aqua of 50-80 % concentration in 10-25 ml, ultrasonic extraction in water bath at 40-60 deg.c, and suction filtering to obtain filtrate in 4-10 ml; adding re-distilled petroleum ether in 2-4 ml into the filtrate, shaking, letting stand to laminate, taking the lower layer of solution in 1-4 ml and adding pure water in 4-20 ml; adding to micro immunoaffinity column of aflatoxin B1, washing with methanol aqua of 10-40 % concentration in 5-10 ml, eluting with methanol in 0.5-2.0 ml, collecting the eluted liquid, adding test agent A in 0.2-1.0 ml; and detecting in fluorescent spectrophotometry or similar instrument. The present invention has the features of simple process, high detection precision and stability, fast detection speed and high safety.