48 results about "2-Methoxyethanol" patented technology

A lytic reagent composition and the method of use for differential analysis of leukocytes using flow cytometry are disclosed. The lytic reagent composition includes a short chain alkyl oxyethanol, such as 2-methoxyethanol, 2-ethoxyethanol, 2-propoxyethanol, or 2-isopropoxyethanol, in a sufficient amount to preserve leukocytes; a non-lysing nonionic surfactant as a debris solublizer; and an inorganic buffer to maintain pH of the lytic reagent composition in a range from 9.1 to 10.7. The lytic reagent composition is used to lyse red blood cells and preserve leukocytes, as well as used as the sheath reagent for the focus flow measurement. The lytic reagent composition, when used on a flow cytometric analyzer with multiple angle light scatter and light absorbance measurements, enables differentiation of leukocytes into five subpopulations.

The invention discloses a preparation method of carbon nanotube by growing on a foamed nickel substrate. The method is a plasma chemical vapor deposition method. Nickelate containing Ni element is dissolved in 2-methoxyethanol firstly, a proper amount of ammoniacal liquor is added, after several hours of high speed stirring, a green transparent sol is obtained after sealing and standing. The sol is coated on the foam nickel substrate material. The foamed nickel substrate formed with sol is placed in the vacuum furnace chamber, when the temperature reaches to 500-600 DEG C., hydrogen and nitrogen according to a certain volume ratio which are used as catalyst for carbon nanotube growth are let in to reduce nickel element for keeping 10 minutes. When the temperature reaches to 700-800 DEG C., a carbon source gas is let in, and hydrogen and nitrogen are kept at a certain volume ratio, after 30 minutes reaction, the growth is finished. The carbon nanotube is grown on the foamed nickel. The method has a simple preparation technology process, and the product can be used as electrode material of green energy storage device.

The invention is a method of combining extraction and azeotropism to separate glycol monomethyl ether, isopropyl alcohol and water, and its steps: using glycerol and benzene as extractant and azeotropic agent, respectively, adopting a rectifying device to separate a mixed solution with isopropyl alcohol plus water plus glycol monomethyl ether, after separating, the isopropyl alcohol plus water is on the tower top and the water plus glycol monomethyl ether is in the tower bottom; separating the distillate from the tower top by extract-rectification process with the glycerol as extractant; after extraction separation, feeding the water plus glycol monomethyl ether in the bottom to an azeotropic distilling device and adopting the benzene as azeotropic agent, where the benzene is recycled. The contents of glycol monomethyl ether and sopropyl alcohol can both reach 99.5% above; those in the water are both lower than below 0.23% and it can primarily obtain glycol monomethyl ether acetate, after separating, the isopropyl alcohol is recycled, the glycol monomethyl ether is returned as raw material.

The invention relates to a preparation method for a barium titanate/graphene composite nanometer material, and the method employs a wet chemical reaction process. The preparation steps comprise: taking 2-methoxyethanol as a solvent dissolving a titanium ion, utilizing ammonia water as a precipitating agent to precipitate titanium ion, adding an aqueous solution of graphene oxide, and fully mixing; utilizing a deionized water solution of barium acetate as a barium source, and taking a mixed solution of ethylenediamine and ethanolamine as a solvent; and finally utilizing a mineralization agent potassium hydroxide to promote crystallization, and performing hydro-thermal reaction to obtain the barium titanate/graphene nanometer powder. The preparation method is simple in process, easy to control, free of pollution and low in cost, and the prepared barium titanate/graphene composite nanometer material is high in purity and good in crystallinity.

The invention relates to a bromfenac sodium preparation method. The preparation method comprises specific steps as follows: indole reacts under the action of DMSO (dimethylsulfoxide) to produce 3-bromoindole; 3-bromoindole is added to 2-methoxyethanol, acid is added for hydrolysis, and 2-indolinone is obtained; boron trichloride is added to methylbenzene, a methylbenzene mixed solution of p-bromobenzonitrile and 2-indolinone is added dropwise, aluminum chloride is then added, acid is added, a reaction is performed, and 7-(4-bromobenzoyl)-1,3-dihydro-indol-2-one is obtained; hydrolysis is performed with an alkaline solution, acid is added for neutralization, and bromfenac is obtained; ethanol is added to bromfenac, bromfenac and a sodium hydroxide solution form salt, the salt is cooled and subjected to recrystallization, and bromfenac sodium is obtained. Compared with the prior art, the synthetic route is short, high-purity bromfenac sodium can be prepared, the quality meets the latest standards of pharmacopoeia, industrial production is facilitated, and the method can provide powerful guarantee for industrial production of bromfenac sodium and intermediates of bromfenac sodium.

The invention discloses environmentally friendly stone-like coating. The coating is prepared by the following raw materials in parts by weight: 0.05-0.15 parts of hydroxyethyl cellulose, 0.4-1.2 partsof 2,2,4-trimethyl-1,3-pentanediol mono(2-methylpropanoate), 0.2-0.8 parts of glycol, 0.05-0.15 parts of 2-amino-2-methyl-1-propanol, 15-30 parts of silicon acrylic emulsion, 50-100 parts of naturalcolor sand, 2-4 parts of rock sheets, 0.3-1.2 parts of 2-methoxyethanol, 0.3-1.2 parts of 2-butoxyethanol, and 5-10 parts of water. The stone-like coating has the advantages of gorgeous appearance color, water resistance, alkali resistance, good adhesion stress, and good ageing resistance; the product is suitable for a plurality of bases, and can be used for effectively protecting buildings from being eroded by severe environment, and prolonging usage life.

The present invention relates to a methoxyactic acid preparation method, wherein Pt/C is adopted as a catalyst, oxygen is adopted as an oxidant, water is adopted as a solvent, and 2-methoxyethanol oxidation is performed to prepare the methoxyactic acid in a one-step manner. Compared with the method in the prior art, the method of the present invention has the following advantages that (1) the used solvent is the water with characteristics of low price, easy obtaining and green environmental protection, such that environment pollution can not generated; (2) the used catalyst Pt/C has the high catalysis efficiency, and can be reused only through the simple filtration after completing the reaction; (3) the reaction conditions are mild, and the operation is operate; and (4) the used oxidant is the O2 with characteristics of safety, environmental protection, low price and easy obtaining, such that waste gas and waste liquid can not be generated.

A method of making a doped silicon oxide thin film using a doped silicon oxide precursor solution includes mixing a silicon source in an organic acid and adding 2-methoxyethyl ether to the silicon source and organic acid to from a preliminary precursor solution. The resultant solution is heated, stirred and filtered. A doping impurity is dissolved in 2-methoxyethanol to from a doped source solution, and the resultant solution mixed with the previously described resultant solution to from a doped silicon oxide precursor solution. A doped silicon oxide thin film if formed on a wafer by spin coating. The thin film and the wafer are baked at progressively increasing temperatures and the thin film and the wafer are annealed.

The invention relates to a method for recycling ethylene glycol monomethyl ether. The method disclosed by the invention comprises the following steps: recycling an ethylene glycol monomethyl ether solution with the moisture content of being less than 20% from ethylene glycol monomethyl ether industrial waste water with the moisture content of being more than or equal to 40% by using a salting-out layering method at first, and then, rectifying to remove water in an azeotropic manner or dehydrating through a drying agent so as to obtain an ethylene glycol monomethyl ether finished product with the moisture content of being less than or equal to 0.2%. According to the invention, the methods, such as the salting-out layering method and the method for rectifying to remove water in an azeotropic manner or dehydrating through the drying agent, are combined; therefore, the method for recycling ethylene glycol monomethyl ether from industrial waste water can be realized with low cost; particularly, recovery of ethylene glycol monomethyl ether from ethylene glycol monomethyl ether industrial waste water having high moisture content can be realized with low cost; and the method disclosed by the invention has the characteristics of being low in cost, flexible, simple and convenient to operate, free from limitation of industrial raw waste water composition fluctuation and the like.

The invention relates to a perovskite thin film battery preparation method. The method includes solving lead acetate, acetylacetone, and methylammonium iodide in a 2-Methoxyethanol solution in a mole ratio of (1-1.1):(1-1.1):3 to obtain a precursor solution with the lead ion concentration of 0.7-0.8 mol/L, performing spin coating of the solution for 150-180s on the glass/ITO/PEDOT to obtain a gel film, obtaining a perovskite layer by performing sun light irradiation and annealing at the low temperature of 70 DEG C, and further preparing a PCBM layer and an Al electrode to obtain a perovskite solar cell having a structure of glass/ITO/PEDOT/perovskite layer/PCBM/Al and having the efficiency improved by 15%. Based on the acetate one-step solution film plating method, and through the combination with the photochemical and long-term spin coating technology, the preparation method has the advantages of high technological repeatability and high battery efficiency.

The invention belongs to the technical field of thin film transistor preparation and discloses a method for preparing an oxide thin film transistor by a solution method. Zr (NO3)4.5 H2O and In (NO3) 3are dissolved in 2-Methoxyethanol to obtain insulation layer precursor solution and active layer precursor solution respectively. Spin coating of insulation layer precursor solution is performed on ITO glass substrate and annealing is performed to obtain zirconia insulation layer film; spin coating of active layer precursor solution is performed on zirconia insulating layer film and annealing isperformed to obtain indium oxide active layer film; a source/drain electrode is vaporized on the indium oxide active layer to obtain an oxide thin film transistor. The ZrO2 and In2O3 thin film is prepared by preparing an oxide precursor solution, combining with spin coating and annealing technology, the TFT device is prepared by using the two thin films as an insulating layer and an active layer respectively, and the TFT device does not need a vacuum environment, the cost is low, and the operation is simple.

The invention provides a 7-nitro-1,2,3-benzoxadiazole (NBD) derivative and a synthesis method and application thereof, and belongs to the field of detection of NBD derivatives and mercury ions. The synthesis method of the NBD derivatives comprises the following steps of: first, dissolving 4-chlorine-7-nitrobenzo-1,2,3-benzoxadiazole and anhydrous piperazine in 2-methoxyethanol, heating and refluxing, and separating by column chromatography to obtain a compound 1; then, heating and refluxing 2,6-bis (chloromethyl) pyridine and 8-hydroxyquinoline in an acetone solution, and separating by the column chromatography to obtain a compound 2; finally, dissolving the compound 1 and the compound 2 in acetonitrile, refluxing for 12 hours, and separating by the column chromatography to obtain the product NBD derivative. The invention also provides a method for detecting the mercury ions, which comprises the step of quantitatively detecting the content of Hg<2+> in a solution of all water (pH = 7.4) by using the NBD derivative as a probe. The detection method can detect the mercury ions in an aqueous solution with high selectivity and sensitivity, and is simple, convenient and rapid to operate.Meanwhile, test paper for detecting the mercury ions is provided, so that the Hg<2+> detection is more convenient.

An improved synthesis method for preparation of iodixanol, and a purification process through macroporous adsorption resin chromatographic column and recrystallization are provided. The synthesis method relates to dimerization of 5-acetamido-N,N′-bis(2,3-dihydroxypropyl)-2,4,6-triiodo-isophthalamide (compound A) to prepare iodixanol, wherein excessive side reactions such as alkylation are effectively inhibited by controlling the pH of the reaction mixture with a boron-containing acidic substance or salts thereof such as boric acid. In this way, the conversion rate of compound A to iodixanol is 85-90%. The iodixanol crude product is purified by a macroporous adsorption resin chromatographic column, obtaining iodixanol product with recovery of 90-95% and purity of 96-98%. The iodixanol crude product is recrystallized in mixed solvent containing 2-methoxyethanol, obtaining iodixanol product with recovery of 90-95% and purity of greater than 99%.

The invention relates to a preparation method of an Li-doped p type ZnO crystal thin film, and belongs to the technical field of semiconductor materials. The preparation method comprises the following steps: dissolving Zn(CH3COO)2.2H2O into a 2-methoxyethanol solvent; adding citric acid; stirring in a water bath and adding LiCl; continually stirring to obtain a uniform colloidal solution; enabling the solution obtain sol to stand, so as to obtain sol; plating a film on a washed and dried glass sheet by adopting the obtained sol through a dipping-lifting method, i.e., slowly immersing the glass sheet into the sol, attaching the glass sheet to the wet sol by using certain viscosity of the sol, slowly and stably lifting the glass sheet from the wet sol at a constant lifting speed through a constant-speed motor, and uniformly distributing the wet sol on two faces of the glass sheet by using the action of gravity; finally, raising the temperature to 400 DEG C to 600 DEG C and carrying out heat treatment on the thin film in air, so as to obtain the Li-doped ZnO thin film.

An ether compound represented by a formula (3) (wherein R represents alkyl having 1 to 6 carbon atoms) can be prepared by the following method. The method comprises the steps: step A, a compound (wherein n represents 0-5 of integer, X represents halogen atom, containing alkyl having 1-3 carbon atoms, cyano, nitro or trifluoromethyl) expressed by formula (1) reacts with 1-6 carbon atom-containing metal alkane thiolate in 2-methoxyethanol; step B, a reaction mixture obtained from step A is added water and a hydrocarbon solvent having 5-8 carbon atoms, and an organic layer is separated; step C, the solvent is distilled in the organic layer obtained from the step B to prepare bis(alkylthiolmethyl)ether; and step D, the bis(alkylthiolmethyl)ether obtained from step C reacts with 2-cyanoethanol and a halogenating agent in the ether solvent.

The invention relates to a system and a method for pretreatment of wastewater in ethylene glycol production. The system comprises a methylal-containing wastewater pretreatment unit, an extracting phase separating device, a raffinate treatment device, a 2-methoxyethanol-containing wastewater pretreatment unit, a fuel ratio mixer, an automatic control device, and an Internet of Things remote monitoring and diagnosis management unit, wherein the methylal-containing wastewater pretreatment unit is a one-stage or multi-stage pressure-relief distillation system; the 2-methoxyethanol-containing wastewater pretreatment unit is mainly a one-stage or multi-stage extracting system. The system has the advantages that the methylal, 2-methoxyethanol and other substances in the wastewater in ethylene glycol production are removed at high efficiency by pressure-relief distillation and multi-stage extracting technologies, and recycled as the resources, so as to create conditions for the subsequent treatment; the running cost of sewage treatment is reduced; the Internet of Things remote monitoring and diagnosis technique is suitable for improving the operating and maintenance management level of theproject, so as to ensure the smooth production and running.

The invention relates to quick-dry environmentally friendly ink. The ink includes, by weight, 4-7 parts of pigment named as Chinese characters 'Guinuotaitong' by the inventor, 10-30 parts of 2-methoxyethanol, 10-15 parts of tetraglycol, 0.5-5 parts of Tergitol 15-S-5, 0.02-3 parts of a Proxel GXL sterilizing agent, 0.4-6 parts of hydrochloric acid and 50-80 parts of water. A preparing method of the ink includes steps of mixing the 'Guinuotaitong' pigment, the 2-methoxyethanol, the tetraglycol, the Tergitol 15-S-5, the Proxel GXL sterilizing agent and the water, fully mixing the materials at a speed of 2000-5000 rpm/min, and then adding the hydrochloric acid to adjust the pH value to 6.5-7.5, and then preparation of the ink is finished. The ink has characteristics of simple raw materials, bright and durable color, capability of being environmentally friendly, and no harm. The preparing method is simple and easy to operate.

The invention relates to ink with durable color. The ink includes, by weight, 4-7 parts of beta-naphthol pigment, 10-30 parts of 1,5-pentanediol, 10-15 parts of diethyleneglycol monomethyl ether (or diethyleneglycol monoethyl ether), 0.5-5 parts of Surfynol 465, 0.02-3 parts of a Proxel GXL sterilizing agent, 0.4-6 parts of phosphoric acid and 50-80 parts of water. A preparing method of the ink includes steps of mixing the beta-naphthol pigment, the 2-methoxyethanol, the diethyleneglycol monomethyl ether (or diethyleneglycol monoethyl ether), the Surfynol 465, the Proxel GXL sterilizing agent and the water, fully mixing the materials at a speed of 2000-5000 rpm/min, and then adding the phosphoric acid to adjust the pH value to 6.5-7.5, and then preparation of the ink is finished. The ink has characteristics of simple raw materials, bright and durable color, capability of being environmentally friendly, and no harm. The preparing method is simple and easy to operate.