40results about How to "Good solvent performance" patented technology

Extractive distillation processes whereby water-soluble extractive distillation (ED) solvents are regenerated and recovered employ improved operations of the extractive distillation column (EDC) so that polar hydrocarbons are recovered and purified from mixtures containing polar and less polar hydrocarbons and measurable amounts of hydrocarbons that are heavier than intended feedstock and / or polymers that are generated in the ED process. The improved process can effectively remove and recover the heavy hydrocarbons and / or remove polymer contaminants from the solvent in a closed solvent circulating loop through mild operating conditions with no additional process energy being expended. With the improved process, the overhead reflux of the EDC may be eliminated to further reduce energy consumption and to enhance the loading and performance within the upper portion of the EDC, especially when two liquid phases exists therein.

A method and a device are provided for the immersion and for the cleaning of the front lens of microscope objectives in fully automatic microscope systems, in particular inverted microscopes, for the examination of biological and / or chemical samples by which, besides an automatic immersion process, an automatic cleaning of the front lens of the microscope objective is achieved at the same time at the conclusion of the immersion process. In a method in which water is preferably used as immersion liquid, the immersion liquid is provided at the same time as a cleaning liquid for the automatic cleaning of a front lens of a microscope objective at the conclusion of the immersion process. The device according to the invention for implementing the method comprises a receiving vessel which can be placed on the front lens of the microscope objective. Openings are provided in the receiving vessel and are connected to a tube system for supplying fresh immersion and cleaning liquid from a reservoir vessel and for discharging the soiled liquid into a receiving vessel.

The invention relates to the field of antistatic polymers, in particular to a polycarbonate / polyester alloy material and a preparation method thereof. The antistatic polycarbonate / polyester alloy material comprises the following components in percentage by weight: 5 to 25 percent of conductive carbon black, 50 to 70 percent of polycarbonate, 10 to 30 percent of polyester, 0. 01 to 0.05 percent of ester exchange catalyst, 1 to 4 percent of compatilizer, 0.1 to 0.5 percent of antioxidant and 0.2 to 1 percent of lubricant; and the preparation method comprises the following steps of: mixing the compatilizer, the ester exchange catalyst, the antioxidant, the heat stabilizer and the lubricant in a high-speed mixing machine; putting the mixture with the polycarbonate and the polyester into an internal mixer until the mixture is molten; and putting the conductive carbon black into the internal mixer, feeding the melt into a twin screw extruder for melt extrusion and prilling. By the method, the prepared alloy material has good performance, good solvent performance and low melt viscosity, stress crack is avoided, and the raw material cost is reduced.

The invention discloses a manufacture method for PPTA that contains 2,4-2(4-amino phenyl)-2, 3dinitrogen phenodiazine-1-detone. It includes the following steps: adding solvent into polymerization reactor, whisking, adding alkali halide, adding 2,4-2(4-amino phenyl)-2, 3dinitrogen phenodiazine-1-detone and p-phenylene diamine; adding paraphthaloyl chloride that has the thickness of 0.3-0.4 mol / l, whisking, keeping reacting at -10-80 degree centigrade for 30-120 minutes; neutralizing by Ca(OH)2 to gain concentrated PPTA solution. The invention has simple technology, low cost, is easy to purity. It could be used in navigation, high capability compounding material, high temperature resistant film and corresponding fabric.

The invention relates to an oxidized zinc ore flotation reagent. The oxidized zinc ore flotation reagent comprises the following ingredients by weight: a regulator consisting of a 180-800 g / t sulfate, 200-500 g / t sodium silicate and 50-200 g / t sodium carbonate, a collector consisting of 130-800 g / t xanthate and a 60-800 g / t black catching agent, and a foaming agent consisting of 100-180 g / t 2# oil. The flotation reagent can achieve the purpose of effective zinc ore enrichment, and different combinations by weight and different ingredient adding sequences of the flotation reagent can be adopted for oxidized zinc ores at different geographical positions, so that the zinc ore utilization ratio, the zinc recovery rate and the zinc finished ore grade are all improved, the zinc recovery rate can be up to 87-90%, and the obtained zinc finished ore grade can be 52-60%. The invention also relates to an oxidized zinc ore flotation method.

The invention discloses a structural adhesive capable of being cured at room temperature and used for a composite sandwich panel, and a preparation method of the structural adhesive. The structural adhesive capable of being cured at room temperature and used for the composite sandwich panel comprises a component A and a component B according to a mass ratio of 100:(50-75), wherein the component A comprises the following components in percentage by mass: 98.5 to 99.9 percent of bisphenol A epoxy resin and 0.1 to 1.5 percent of a defoaming agent; the component B comprises the following components in percentage by mass: 65 to 80 percent of a curing agent, 10 to 25 percent of a toughening agent, 1 to 5 percent of a curing accelerator, 1 to 5 percent of a silane coupling agent and 0.2 to 1 percent of an antioxidant. The structural adhesive capable of being cured at room temperature and used for the composite sandwich panel, provided by the invention, has a wide use range, can select medium-temperature or normal-temperature curing according to requirements, has high mechanical properties, such as toughness and the like, and excellent temperature tolerance, and completely meets use conditions of national military standards.

The invention provides a novel crystallizable polyether ether ketone resin capable of dissolving side groups containing phthalein and a preparation method thereof, and belongs to the technical field of polymer materials. Under nitrogen protection conditions, mixed bisphenol and a dihalogen monomer of the equimolar ratio are used as a synthetic monomer, toluene or xylene is used as a water-carryingagent, potassium carbonate and / or sodium carbonate 1-1.4 times the total molar amount of a bisphenol monomer is used as a catalyst, and sulfolane or dimethyl sulfoxide is used as a solvent for the reaction. Synthesis is performed at 240 DEG C for 4.5-10 hours. The crystallinity of the resin is 2-40%, and the number average relative molecular weight is more than 30,000. The thermal tensile deformation rate of the resin at 250 DEG C is 0-400%, and the resin can be dissolved in 1,1',2,2'-tetrachloroethane and / or p-chlorophenol. The polyether ether ketone resin has the advantages of strong crystallization capacity, high molecular mass, good tensile performance, strong molecular orientation capability and excellent solubility.

The invention discloses a high-strength and corrosion-resistant BMC (bulk molding compound) material anchoring system for an FRP (fiber reinforced plastic) grid. An anchoring part comprises an upper pressing sheet, a middle fixing sheet and a bottom gasket fixed together from top to bottom; two adjacent side surfaces of the upper pressing sheet are aligned to the corresponding side surfaces of the middle fixing sheet and the bottom gasket respectively; a hole is formed in the middle of the anchoring part; a knock-type expansion anchor bolt comprises a sleeve and an anchor screw positioned in the sleeve; the outer diameter of the sleeve is slightly smaller than the inner diameter of the hole; lines are arranged on the exposed surfaces of the upper pressing sheet and the bottom gasket; the bottom of the sleeve is divided into three parts; the spaced bottom of the sleeve can be expanded when being extruded. The anchoring system and an anchoring method are good in durability, convenient for construction and excellent in performance, not only can effectively and conveniently fix the FRP grid but also have good mechanical property, radically solve problems of interfacial debonding and slip, have the advantages of corrosion resistance, high strength and the like, and can better ensure cooperative work of the FRP grid and concrete.

The invention discloses a self-repairing material and a preparation method thereof, belongs to the technical field of new materials, and particularly relates to a preparation method of a self-repairing material. The self-repairing material is prepared from a polyamide polymer obtained by polymerizing succinamide, 1, 4-diisocyanobenzene, furfural and 2-hydroxy propionic acid or 2, 2-dimethylolpropionic acid, wherein the preparation method of the polyamide polymer comprises the following steps of: adding succinamide and furfural into methanol, adding a THF solution containing 1, 4-diisocyanobenzene, and reacting at 50-80 DEG C for 24-72 hours to obtain the polyamide polymer. The obtained self-repairing material is good in self-repairing capacity, and the repairing rate reaches 85% or above;and the self-repairing material is good in acid resistance, good in alkali resistance, good in solvent (THF, methylbenzene and ethyl alcohol) resistance and good in high-temperature resistance, the mass loss is 0.14% or below after the self-repairing material is soaked in 1M hydrochloric acid for 7 days, and the mass loss is 0.38% or below after the self-repairing material is soaked in a 1M sodiumhydroxide solution for 7 days.

The invention belongs to the field of cosmetics, and discloses a composition having bacterium resisting effects. The composition having bacterium resisting effects comprises the following components of 0.001-8 parts of nisin, 0.001-5 parts of polylysine, 0.001-5 parts of cordycepin, 0.001-2 parts of lysozyme, 0.1-20 parts of 1,2-hexanediol, 0.01-1 part of p-phydroxyacetophenone, 60-90 parts of water and 0.1-5 parts of a pH regulator. Compared with the prior art, the prepared composition has the advantages that through appropriate selection of the nisin, the polylysine and the cordycepin and appropriate selection of consumption, the prepared composition has favorable effects of resisting bacteria and restraining bacteria, and particularly has excellent effects of resisting bacteria and restraining bacteria on heat-resisting coliform, pseudomonas aeruginosa, streptococcus albus, aspergillus niger and microzyme, so that the composition can replace a traditional preservative when being applied to the skin care products to avoid potential damage to skin by a conventional preservative and improve the safety of the products.

The invention provides a method for preparing ethyl levulinate from pennisetum sinese stalks, and belongs to the technical field of biomass energy chemical engineering; the method comprises the following steps: by taking the pennisetum sinese stalks as a raw material, carrying out pretreatment by using a NaOH solution, and then further carrying out alcoholysis on collected solid residues to prepare the ethyl levulinate; in the alcoholysis process, a cosolvent of gamma-valerolactone and ethanol is used as a reaction medium, Al(OTf)3 is used as a catalyst, the reaction is carried out at 170-190 DEG C, and the highest yield of the reaction product ethyl levulinate can reach 72.6%. A biomass fiber raw material is converted into ethyl levulinate through pretreatment and the synergistic effect of gamma-valerolactone and an ethanol system; the ethyl levulinate is directly prepared from the pennisetum sinese stalks, and the method has the advantages of cheap and easily available raw materials, high conversion efficiency and target product yield, economical and efficient preparation process and the like, and has a good industrial application prospect.

The invention relates to an outdoor weather-proof compact laminate and a preparation method thereof. The outdoor weather-proof compact laminate comprises a base plate. An outer side of the base plateis coated by decorative paper treated by impregnating resin. The surface of the decorative paper is coated by an electron beam curing coating. Through laying the electron beam curing coating on the surface of the decorative paper of the compact laminate, the acquired compact laminate is high-temperature-resistant, boiling-water-resistant, and impact-resistant, has the more excellent weather resistance, and can be suitable for an outdoor environment better, so an application range of the compact laminate is greatly enlarged. An electron beam curing technology is applied to the compact laminate,so strong acid and strong alkali and solvent resistance on the surface of the compact laminate can be improved. The compact laminate has outdoor ultraviolet resistance and weather resistance which acommon compact laminate does not have.

The invention relates to the technical field of anthocyaninprocessing, in particular to a preparing method of onion anthocyanin. Biological enzymes and probiotics are utilized to pretreat onions, thebiological enzymes are prepared by mixing pectinase, cellulase and onion pseudomonas cepacialipase, cell walls of the onions can be effectively broken, and separation of internal soluble substances inonion cells is accelerated. The probiotics obtained by screening a culture medium has a high antibacterial capability, the onion cells can be effectively decomposed, and separation of anthocyanin ispromoted; subcritical1,1,1,2-tetrafluoroethane fluidis adopted to conduct extraction, macropore resin further purifies extract, and the yield and the extracting rateof anthocyanin can be safely and effectively increased.

The invention discloses a subcritical composite solvent extraction separation method for multiple components in flaxseed meal. The method comprises the following steps: taking flaxseed meal, adding an extraction agent, and carrying out subcritical extraction to obtain a crude flax lignan extract and crude flaxseed oil in one step, wherein the extraction agent is composed of n-butane and absolute ethyl alcohol according to the volume ratio of 1: 1; adding n-hexane into the crude flaxseed oil, performing liquid separation extraction, and carrying out rotary evaporation to obtain flaxseed oil; and extracting the taken flaxseed meal with hot water to obtain flaxseed gum. The subcritical composite solvent used in the extraction process can replace a large amount of organic reagents used in traditional extraction, has the characteristics of good solvent effect, greenness, recyclability, small environmental burden and the like, and can reduce the risk of the organic reagents to operators and the natural environment in the process. And the subcritical extraction has lower requirements on operation and professionals, various high-added-value components are obtained while operation units are reduced, the resource utilization is maximized, and the cost is reduced, and the benefit is increased.

The invention discloses a preparation method of moxifloxacin hydrochloride. The method comprises the following steps: performing condensation by using 1-cyclopropyl-6,7-difluoro-1,4-dihydro-8-methoxy-4-oxo-ethylquinolinecarboxylate as a central ring, and (S,S)-2,8-diazabicyclo[4,3,0]nonane as a side chain, after alkali hydrolysis is completed, adding a part of 6N hydrochloric acid, performing primary crystallization, adding the remaining 6N hydrochloric acid, performing secondary crystallization, and performing recrystallization on the crystallized product obtain by the secondary crystallization once by using ethanol to obtain the moxifloxacin hydrochloride with a high content and excellent quality. When the method provided by the invention is adopted to prepare the moxifloxacin hydrochloride, product loss caused by repeated crystallization is reduced, labor intensity is reduced, energy consumption is reduced, product stability is improved, product quality is greatly improved, and themethod is suitable for industrialized large-scale production; and the prepared moxifloxacin hydrochloride contains 99.6%-102.0% of C21H25ClFN3O4 calculated by an anhydrate, and has a low total impurity content.

The invention belongs to the field of organic photoelectric materials. In recent years, as wide application of donor (D)-acceptor (A) type conjugated polymers gradually attracts attention of people, in order to solve the problem that conjugated polymer materials capable of being processed by green solvents are deficient, the dissolving property of the materials in polar solvents is regulated and controlled through side chain modification, and necessary conditions are provided for green industrial production of solar cell devices and electrochromic devices in the future. In the field of solar cells, the material can be matched with numerous acceptor materials, and single-layer or laminated devices can be prepared through green solvent processing; and the material has high contrast in the field of electrochromism, can be prepared into an electrochromic device of a hydrogel electrolyte, can be compatible with a water electrolyte to prepare an environment-friendly electrochromic device, and reduces the influence of an organic electrolyte on the environment. The material has dual functions of photovoltaic and electrochromism, and can be prepared into a device integrating power generation, power storage and intelligent window in the future.

The invention discloses an anti-corrosion, conductive and hydrophobic coating for an overhead line system component, which is characterized in that the anti-corrosion, conductive and hydrophobic coating is used for corrosion and hydrophobic protection of the overhead line system component in a tunnel, and the anti-corrosion, conductive and hydrophobic coating comprises the following components in parts by mass: 10-20 parts of film-forming resin, 55-65 parts of an organosilicon monomer, 0.5-2.5 parts of a cross-linking agent, 5-10 parts of an interface adhesive, 0.1-0.3 part of a catalyst, 30-60 parts of a conductive filler, 1-3 parts of a corrosion inhibition passivator, 0.2-0.4 part of a directional arrangement agent, 3-6 parts of a dust-proof agent, 10-20 parts of a solvent, 0.3-0.8 part of a defoaming agent and 5-20 parts of pigment and filler; The film-forming resin is organic silicon modified bisphenol A epoxy resin. After the pollution-repellent coating forms a film, the film is compact, high in hardness and low in surface energy, has excellent salt-spray corrosion resistance, damp-heat corrosion resistance, conductivity and pollution-repellent performance, and can meet the pollution-repellent, anti-corrosion and conductive requirements in a high-speed rail overhead line system assembly tunnel.

The invention discloses a positioning device and a processing method for a dirt-repellent anti-corrosion section steel cantilever of a contact net. The pisitioning device is characterized in that the outer surfaces of part of or all parts are plated with hot-dip anti-corrosion plating layers, the outer surfaces of the hot-dip anti-corrosion plating layers are coated with dirt-repellent composite coatings, and the dirt-repellent composite coatings are anti-corrosion conductive dirt-repellent coatings. On the premise that the surface conductivity of a contact net assembly is not affected, the coating with the dirt repelling function is prepared on the hot-dip galvanized or GalFan alloy anti-corrosion coating, deposition of corrosive pollutants on the surface of the contact net assembly in a tunnel is reduced, and the overall anti-corrosion performance and the service life of the steel cantilever positioning device are improved.

The invention relates to the technical field of building admixtures, more specifically, to a method for preparing a composite biografted concrete hydrophobic pore plug. After adding alkylene polyoxyethylene ether into hydrogen peroxide and continuously stirring for 5 minutes, the liquid A , B solution and C solution are added dropwise for 2 hours, 2.5 hours and 1.5 hours respectively; the product has a very high degree of purification during the compounding process, and has good anti-corrosion, anti-acid and anti-alkali effects in use. After a certain proportion After being added to concrete, it can well replace traditional hydrophobic compounds, and the synthesis process is relatively simple, which is easy for industrial production.

The invention relates to the technical field of building admixtures, in particular to a preparation method of a hydrophobic pore suppository for composite biological grafted concrete. The preparationmethod comprises the following steps: adding hydrogen peroxide into alkylene alkenyl polyoxyethylene ether, continuously stirring for 5 minutes, and dropwise adding a solution A, a solution B and a solution C for 2 hours, 2.5 hours and 1.5 hours respectively. The product is very high in purification degree in the compounding process, has very good corrosion resistance, acid resistance and alkali resistance in use, can well replace a traditional hydrophobic compound after being added into concrete according to a certain proportion, and is relatively simple in synthesis process and easy for industrial production.

The invention relates to the technical field of sunscreen processing, in particular to a sunscreen cream and a preparation method thereof. The sunscreen cream is prepared from onion anthocyanin, mushroom extracting solution, wheat bran extracting solution, propolis, walnut powder extractive, tea-seed oil and isopropyl palmitate. The sunscreen cream comprises rich onion anthocyanin, sodium phytate,vitamin, unsaturated fattyacid, butyric acid oxidase, tannin and the like, and these components can effectively eliminate free radicals in a human body, prevent peroxidation of polyunsaturated fattyacids on biological membrane caused by the free radicals, enhance anti-lipid peroxidation of the human body, protect tissues of the human body, effectively reduce membrane system damage; meanwhile, the saturated fatty acid, the tea-seed oil and the like can reflect sunshine, have protective effect on skin, and have effective sunscreen effect.

The invention relates to an oxidized zinc ore flotation reagent. The oxidized zinc ore flotation reagent comprises the following ingredients by weight: a regulator consisting of a 180-800 g / t sulfate, 200-500 g / t sodium silicate and 50-200 g / t sodium carbonate, a collector consisting of 130-800 g / t xanthate and a 60-800 g / t black catching agent, and a foaming agent consisting of 100-180 g / t 2# oil. The flotation reagent can achieve the purpose of effective zinc ore enrichment, and different combinations by weight and different ingredient adding sequences of the flotation reagent can be adopted for oxidized zinc ores at different geographical positions, so that the zinc ore utilization ratio, the zinc recovery rate and the zinc finished ore grade are all improved, the zinc recovery rate can be up to 87-90%, and the obtained zinc finished ore grade can be 52-60%. The invention also relates to an oxidized zinc ore flotation method.

The invention belongs to the technical field of anticorrosive paint, and particularly relates to a coating for rusted coating of surfaces of rusted hot-dip galvanized steel structures. The coating comprises a coating A and a coating B; the coating A is prepared from, by weight, 5-8 parts of lauric acid, 12-20 parts of epoxy resin, 42-53 parts of reduced zinc powder, 10-20 parts of xylene, 2-5 parts of ethyl alcohol, 2-4 parts of organic bentonite, 5-10 parts of hectorite and 20-25 parts of water; the coating B is prepared from the following components in parts by weight: 7 to 9 parts of polyepoxysuccinic acid, 3 to 5 parts of a silicate, 2 to 4 parts of a molybdate, 12 to 14 parts of ethylene glycol, 6 to 9 parts of N-sodium lauroyl sarcosine, 8 to 12 parts of acrylic emulsion and 5 to 8 parts of water. The coating has good binding force with the surfaces of the hot-dip galvanized steel, and the adhesive force is 0 grade; the coating is good in flexibility and corrosion resistance, andcan be used for coating the rusted surface of rusted hot-dip galvanized steel with rust.

The invention relates to the technical field of yoghourt processing, in particular to a yoghourt for reducing blood fat and a preparation method thereof. The yoghourt is prepared from onion anthocyanin, a burdock root extract, ganoderan, dragon fruit polysaccharide, a rhizome dioscoreae juice, buffalo milk, lactic acid bacteria, saccharomycetes and lactobacillus plantarum; the yoghourt is rich inanthocyanin, burdock root polysaccharide, the ganoderan, the dragon fruit polysaccharide and other active ingredients; the fat content of the yoghourt using the buffalo milk is lower than the fat content of a yoghourt using floralwhite cow milk, so that a better effect on reducing blood fat is achieved; the anthocyanin has high activity and an effect on improving reverse cholesterol transportation, so that cholesterol in aortic intimal plaque is continuously transported to a liver and is continuously disassimilated; the anthocyanin is synergized with the burdock root extract, the ganoderan, the dragon fruit polysaccharide, the rhizome dioscoreae juice and the like, so that the generation of free fatty acid and the synthesis of neutral fatty acid can be inhibited, and a blood fat reductioneffect of the yoghourt is improved.