40 results about "Ethyl Ethers" patented technology

The present application belongs to the technical field of cleaning products, and particularly relates to a high-temperature oil stain removing stove cleaner as well as a preparation method and application thereof. The high-temperature oil stain removing stove cleaner provided by the present application comprises the following components and mass fractions: 11-33 parts of an alkaline additive, 1-2 parts of hydroxyethylidene diphosphonic acid, 3-6 parts of a non-ionic surfactant, 4-8 parts of a solvent, 1-3 parts of a solubilizer, 1-3 parts of sodium xylene sulfonate, and 45-79 parts of water; the solvent comprises ethylene glycol monobutyl ether and diethylene glycol ethyl ether. The high-temperature oil stain removing stove cleaner provided by the present application has the advantages of simple cleaning method, high-temperature oil removing effect, good stain removing and oil scale removing effect on commercial kitchen utensils, high safety, no corrosion to metal, simple raw material composition, and no need to add a defoaming agent.

The application relates to a component detection method of a cosmetic liquid and a permeability detection method of the cosmetic liquid, and the component detection method comprises the following steps: adding a protein precipitant to purify the cosmetic liquid; performing liquid chromatography-tandem mass spectrometry on the purified cosmetic liquid to obtain chromatographic peak response values of nicotinamide, ascorbic acid and VC ethyl ether; wherein, the positive ion and the negative ion are alternately ionized in the mass spectrometry, and multiple reaction monitoring is performed on the nicotinamide, the ascorbic acid and the VC ethyl ether; and the concentrations of the nicotinamide, the ascorbic acid and the VC ethyl ether in the cosmetic liquid are obtained according to the chromatographic peak response values. The method improves the detection precision of low-concentration and multi-target component.

The application discloses a water-based zinc ion battery electrolyte, a preparation method and application thereof. The water-based zinc ion battery electrolyte contains a zinc salt, ethylene glycol ether and water. The zinc salt is selected from at least one of ZnSO4, ZnCl2 and Zn(OTf)2. In the water-based zinc ion battery electrolyte, the mass content of the ethylene glycol ether is 1-20 wt%. The concentration of the zinc salt is 3M.

This application relates to the field of waterborne cathodic electrophoretic coating technology, specifically disclosing a bisphenol A epoxy-polyetheramine composite matte electrophoretic emulsion and its preparation method. The bisphenol A epoxy-polyetheramine composite matte electrophoretic emulsion comprises the following raw materials in parts by weight: 30-40 parts E-51 epoxy resin, 8-10 parts bisphenol A, 9-11 parts bisphenol A polyoxyethylene ether, 0.08-0.12 parts benzylamine, 2.5-3.5 parts methylethanolamine, 0.8-1.2 parts diethylene glycolamine, and 2.5-3.5 parts ketimine. This application uses E-51 epoxy resin, bisphenol A, and bisphenol A polyoxyethylene ether as the matrix skeleton, and obtains an epoxy equivalent prepolymer after chain extension catalyzed by benzylamine. At the same time, toluene diisocyanate is reacted with diethylene glycol butyl ether, diethylene glycol ethyl ether, and trimethylolpropane polyoxyethylene ether to prepare a blocked crosslinking agent, thereby achieving a uniform internal matting effect without the addition of external matting powder.

A fiber-reinforced lithium borohydride-based all-solid-state electrolyte for suppressing dendrite formation, its preparation method, and its application are disclosed. The method employs a reverse micelle precipitation method to prepare a precursor solution by dissolving lithium borohydride and lithium iodide in an ether solvent solution. Aluminum oxalate and vapor-grown carbon fibers are then added, followed by dropwise addition to an isopentane solution containing a surfactant. After reverse micelles form, the solution is allowed to settle and react completely, and the solvent is thoroughly removed. The product from the settled reaction is dried and then subjected to partial hydrogen release treatment. The partially hydrogen-released product is dispersed in a benzene solution containing polymethyl methacrylate, freeze-dried, and then melt-reacted in situ in a universal mold. This process is simple and highly controllable, significantly improving the mechanical stability and dendrite resistance of the lithium borohydride-based all-solid-state electrolyte, and enabling long lifespan of all-solid-state lithium batteries under fast-charging conditions, thus facilitating commercial applications.

This invention provides a dyne pen ink, its preparation method, and its application. The dyne pen ink comprises ether compounds selected from ethyl carbitol and / or butyl carbitol. Through the design of the dyne pen ink components, this invention provides a novel, more environmentally friendly dyne pen ink with a 2-second observation time, without using toxic, carcinogenic, teratogenic, and reproductively toxic ethylene glycol ethyl ether. Furthermore, the dyne pen ink provided by this invention significantly improves abnormal shrinkage in smaller sizes (22-33), resulting in more accurate dyne values ​​obtained from testing, and the testing process does not significantly impact the health of the testers.

The present invention provides a novel flavor enhancer for vanilla flavoring compositions that improves the flavor of a vanilla flavoring composition to a high-quality flavor with a natural, luxurious feel of vanilla and / or a vanilla extract feel; a flavoring composition for vanilla-flavored food and beverages having a high-quality flavor with a natural, luxurious feel of vanilla and / or a vanilla extract feel; and vanilla-flavored food and beverages containing the flavoring composition. [Solution] A flavor enhancer for vanilla flavoring compositions, comprising one or more compounds selected from group A below. (Group A) Ethyl furfuryl ether, benzyl ethyl ether, sec-butyl ethyl ether, prenyl ethyl ether, dibenzyl ether, furfuryl methyl ether, benzyl methyl ether

The application belongs to the field of chemical synthesis, and particularly relates to a preparation method of high-selectivity ethylene glycol monoethyl ether, and reaction steps comprise: under the protection of inert gas, etherification reaction of ethylene glycol and ethanol is generated to form ethylene glycol monoethyl ether in the presence of heteropolyacid salt / molecular sieve supported catalyst. The supported catalyst used by the application has a special structure, and has very high selectivity to the generation of ethylene glycol monoethyl ether. In addition, the application still has high conversion rate and selectivity under large-scale production (ten kilogram level), and the reaction condition is more moderate compared with the prior art, and is suitable for industrial production.

One embodiment of the present application is a thermosetting release coating agent composition, which is a thermosetting release coating agent composition containing an alkyl-etherified melamine resin (A) and an acid catalyst (B), contains an ethyl ether group as an alkyl ether group contained in the alkyl-etherified melamine resin (A), and has a weight average molecular weight of the alkyl-etherified melamine resin (A) of 500 to 1,100.

The application provides a method for preparing a compound shown in formula I. The method comprises the following steps: contacting a compound shown in formula (II) with a first fluorinating agent to obtain the compound shown in formula (I). The method has low safety risk and low synthesis cost, and is suitable for industrial production. Wherein R1 is F, Cl, Br or I, and the first fluorinating agent is selected from one or more of hydrogen fluoride pyridine, boron trifluoride ether and fluoroboric acid.

The present invention is directed to methods for improving the therapeutic outcome of treatment with roflumilast. The therapeutic outcome is improved by consistent delivery and / or a longer plasma half-life of a topically administered roflumilast composition. The roflumilast composition preferably includes dicetyl phosphate, ceteth-10 phosphate, diethylene glycol monoethyl ether, and / or hexylene glycol.

The application belongs to the technical field of polymer medical materials, and particularly relates to a four-arm PEG and a preparation method thereof. Specifically, the preparation method comprises the following steps: reacting monomethoxy PEG with bromo-pentaerythritol in an alkaline solvent to form four-arm PEG tetramethyl ether; and then removing the methyl groups from the four-arm PEG tetramethyl ether under the conditions of thiol, boron trifluoride ether and the like for a certain time to generate four-arm PEG. The application can effectively overcome the defects in the existing four-arm PEG preparation method, such as high safety risk and high cost caused by the use of ethylene oxide, and crosslinking products caused by the use of double-end PEG raw materials. The method should use safe and easily available raw materials, and the reaction conditions are mild and controllable, so that the directional high-yield synthesis of four-arm PEG is realized, and therefore the method has good practical application value.

This invention discloses a thin-layer chromatography (TLC) identification method for five medicinal herbs in Lingqiao Jiedu Pills, belonging to the field of traditional Chinese medicine quality control technology. This invention uses only one sample. First, an ethyl acetate extract is obtained through volatile oil extraction. Petroleum ether (30-60℃)-ethyl acetate is used as the developing solvent, and anisaldehyde-sulfuric acid-ethanol solution is used for color development, simultaneously identifying Schizonepeta tenuifolia and Mentha haplocalyx. Then, the aqueous solution after volatile oil extraction is centrifuged, extracted with ethyl acetate, evaporated to dryness, and dissolved in methanol. Using chloroform-methanol-glacial acetic acid, ethyl acetate-formic acid-glacial acetic acid-water, and dichloromethane-diethyl ether-methanol-n-hexane systems as developing solvents, Forsythia suspensa, Glycyrrhiza uralensis, and Arctium lappa are identified sequentially. This method is simple, rapid, and efficient, producing clear spots without tailing or cross-interference. It exhibits good specificity and reproducibility, making it suitable for the quality control of Lingqiao Jiedu Pills.

This invention discloses a non-phosphorus ethylene cracking furnace coking inhibitor, its preparation method, and its application, applicable to the field of ethylene production technology. The inhibitor comprises the following components by weight percentage: dimethyl dithioaminodiethyl ester (7-32%), tributyl citrate (25-45%), dioctyl maleate (15-35%), pentaerythritol tetraisostearate (10-25%), sorbitan monooleate (5-20%), dioctyl adipate (3-15%), and butyl stearate (1-10%), as well as an organic solvent (a mixture of ethylene glycol ethyl ether, ethylene glycol butyl ether, propylene glycol methyl ether, isopropanol, and n-butanol), and is completely free of phosphorus. This inhibitor effectively prevents catalytic coking and inhibits gas-phase polymerization reactions through a dual mechanism of "physical shielding + chemical inhibition." Compared with existing coking suppression methods, this invention has higher coking suppression efficiency, less equipment corrosion, excellent storage stability, and environmental safety, making it suitable for various ethylene plants.

This invention discloses a substrate solution formulation and preparation method for the Antu A2000 fully automated chemiluminescence immunoassay analyzer, belonging to the field of in vitro diagnostic reagent technology. The substrate solution includes solution A and solution B, wherein solution A consists of hydrogen peroxide, a buffer, and a hydrogen peroxide stabilizer; solution B consists of purified luminol, a luminescence enhancer, and a buffer. The hydrogen peroxide stabilizer is selected from HEDP, 8-hydroxyquinoline, urea, or sodium polyacrylate; the luminescence enhancer is selected from 4-morpholinopyridine, p-iodophenol, or imidazole; luminol is purified by ethanol-water gradient recrystallization and ether extraction. The preparation method includes: weighing and dissolving the components, adjusting the pH, stirring and filtering, and dispensing into opaque containers. This invention uses a stabilizer to improve the stability of hydrogen peroxide, an enhancer to increase the luminescence intensity, and reduces impurity interference, resulting in high sensitivity and low cost. It can completely replace the original reagents, exhibiting significant economic and social benefits.

The application discloses a continuous closed-loop cyclic production process for preparing propionic acid ester by taking methanol or dimethyl ether as raw material, and belongs to the technical field of organic synthesis chemical industry. The process comprises the following steps: S1, methyl acetate is hydrogenated to generate mixed alcohol of methanol and ethanol; S2, mixed alcohol is etherified with methanol to generate mixed ether comprising dimethyl ether, diethyl ether and methyl ethyl ether; S3, mixed ether is carbonylated with dimethyl ether and carbon monoxide to generate mixed ester comprising methyl acetate, ethyl acetate, methyl propionate and ethyl propionate; S4, ethyl acetate, methyl propionate and ethyl propionate products are obtained through rectification separation in a plurality of towers in series connection, and methyl acetate is recovered; and S5, the recovered methyl acetate is recycled back to the step S1. By constructing a methyl acetate directional closed-loop cyclic system, the application realizes efficient co-production of propionic acid ester and ethyl acetate, uses solid catalysts in the whole process, avoids strong acid corrosion, has high raw material utilization rate, has mild reaction conditions, can be continuously produced in industry, and effectively solves the problems of high cost, single product and non-recyclable utilization in the prior art.

This invention belongs to the field of rice bran oil refining technology, specifically relating to a method for separating organochlorines and free fatty acids from crude rice bran oil. The method includes: adding crude rice bran oil to a mixed solution for multi-stage countercurrent extraction, monitoring the content of organochlorines in the heavy phase during extraction; separating the heavy and light phases, concentrating the light phase, dissolving it in ether, then adding water and liquid alkali to remove residual acid value; finally, dewaxing, decolorizing, and deodorizing to obtain refined crude rice bran oil. This invention employs a specific water and alcohol mixed solution and a low-temperature multi-stage extraction process, which can simultaneously and efficiently remove organochlorines, free fatty acids, and monoglycerides from crude rice bran oil, significantly reducing the content of organochlorines and removing monoglycerides without generating secondary harmful substances. The process is mild and environmentally friendly, with controllable parameters, suitable for industrial-scale rice bran oil refining production, and can significantly improve product safety and added value.

Provided is a novel crystallization method for epirubicin hydrochloride. Provided is a production method for crystals of epirubicin hydrochloride that includes (a) a step for obtaining a mixture that includes epirubicin hydrochloride, two alcohols, and water and (b) a step for adding an ether to the mixture obtained at step (a) and crystallizing the epirubicin hydrochloride. Also provided are novel crystals of epirubicin hydrochloride.

A highly efficient method for extracting 6-gingerol involves drying fresh ginger, mixing it with micronized silica gel, and pulverizing it into a powder. The powder is then added to an extraction solvent prepared from ethanol, glycerol, CTAB, and vitamin C, followed by ultrasonic extraction to obtain the extract. In this invention, micronized silica gel is added to the raw material, and the extraction solvent is prepared using ethanol, glycerol, CTAB, and vitamin C. During low-temperature ultrasonic extraction, the difficulty in extracting antioxidant components from dried ginger is solved, effectively improving the transfer rate and yield of 6-gingerol. The transfer rate of 6-gingerol from dried ginger reaches 77.8%, and the yield reaches 43.6%. Subsequently, during purification, a purification solvent composed of diethyl ether and n-hexane is used, effectively improving the purity of the product; the purity of 6-gingerol reaches 98.6%.

The present application belongs to the technical field of environmental protection chemical materials, and particularly relates to a green and environment-friendly high-methyl-etherified resin adhesive and a preparation method thereof. The adhesive comprises a high-methyl-etherified melamine formaldehyde resin matrix and temperature-sensitive slow-release capsules dispersed therein. The capsules are composed of a temperature-sensitive liposome encapsulating a formaldehyde adsorbent and a VOC adsorbent. The preparation method comprises the following steps: synthesizing the resin matrix through a two-step method; preparing the temperature-sensitive liposome by using an ether injection method to encapsulate the adsorbents, and then obtaining capsule powder through freeze-drying; and finally, compounding the two. Through the intelligent response release characteristics of the temperature-sensitive capsules, the present application can accurately release the adsorbents in the curing temperature range of the adhesive, realize in-situ efficient capture of free formaldehyde and volatile organic compounds generated in the curing process, thereby significantly reducing the pollutant emissions in the coating process, and not affecting the original mechanical properties and workability of the adhesive.

This invention belongs to the field of organic chemistry and discloses a method for preparing high-purity bis-diethoxydiethylenecyclohexane 1,4-dicarboxylic acid ester. The method includes: using 1,4-cyclohexanedicarboxylic acid and diethylene glycol monoethyl ether as main raw materials, an esterification reaction is carried out under the action of a catalyst; the reaction is accelerated by removing water, a byproduct of the reaction, at a reflux temperature of 70-80°C under reduced pressure using a water separator, and the reaction is carried out for 2.5-5 hours to obtain a reaction solution of bis-diethoxydiethylenecyclohexane 1,4-dicarboxylic acid ester; the reaction solution is then subjected to hot filtration to remove impurities, and the filtrate is desolventized by vacuum distillation to obtain high-purity bis-diethoxydiethylenecyclohexane 1,4-dicarboxylic acid ester. This preparation process has the advantages of short reaction time, low energy consumption, and simple post-processing. This invention provides a new, low-cost, efficient, and environmentally friendly industrial preparation method.

Disclosed herein are methods for preparing tertiary alcohols from optionally substituted phenyl ketones or optionally substituted pyridyl ketones, the methods comprising the use of chiral ligands and boron trifluoride etherate. The tertiary alcohols can be used to prepare synthetic forms of natural products and / or drugs.

This invention provides a method for preparing high-purity vinyl ethyl ether by liquid-phase pyrolysis of acetaldehyde diethanol. The method includes the following steps: (1) mixing acetaldehyde diethanol, solvent, and catalyst to obtain a reaction solution; (2) preheating the reaction solution obtained in step (1) and then pumping it into a pipeline reactor for liquid-phase pyrolysis to obtain a pyrolysis solution; (3) flash evaporation and separation purification of the pyrolysis solution obtained in step (2) to obtain vinyl ethyl ether. This invention utilizes specific catalysts and solvents to achieve efficient pyrolysis of acetaldehyde diethanol, and combines flash evaporation and separation purification to achieve the separation and purification of reaction products and raw materials. Moreover, the method has the characteristics of good process stability, mild reaction conditions, continuous long-term production operation, high product purity, low waste, and high energy efficiency, and has good application prospects.

The application provides a method for preparing propylene ethyl ether by liquid phase cleavage of propionaldehyde diethyl acetal, and realizes low-cost and efficient preparation of high-purity propylene ethyl ether through sequentially conducted liquid phase cleavage reaction, rectification and extraction. The propylene ethyl ether content of the finished product propylene ethyl ether is greater than or equal to 98.0 wt%, the ethanol content is less than 1.0 wt%, and the quality of the finished product propylene ethyl ether is higher than that of propylene ethyl ether produced by a Rapaph process.

This invention discloses a method for indirectly preparing cyclohexanol from cyclohexene. The method involves etherifying cyclohexene with ethanol under a nitrogen atmosphere in the presence of molecular sieve catalyst I to obtain cyclohexylethyl ether. Then, in the presence of molecular sieve catalyst II, the cyclohexylethyl ether undergoes hydrolysis with water. The oil phase is extracted and distilled to obtain cyclohexanol. This invention, which uses etherification of cyclohexene with ethanol followed by hydrolysis to prepare cyclohexanol, is suitable for continuous industrial production and has advantages such as high safety, environmental friendliness, low production cost, high selectivity for cyclohexanol, and environmentally friendly and recyclable catalysts. It is an effective route for preparing cyclohexanol.

The application discloses a negative-electrode-free sodium battery electrolyte and a preparation method and application thereof, and belongs to the battery field.The negative-electrode-free sodium battery electrolyte comprises the following raw materials in parts by weight: 50-80 parts of a linear ether main solvent; 10-30 parts of 1,3-dioxolane cosolvent; 10-17 parts of an electrolyte sodium salt; and 0.3-2 parts of a pyridine boronic acid additive.The pyridine boronic acid additive is at least one of pyridine-3-boronic acid, pyridine-3-boronic acid neopentyl glycol ester and pyridine-4-boronic acid neopentyl glycol ester.The linear ether main solvent is at least one of ethylene glycol dimethyl ether, diethylene glycol dimethyl ether, tetraethylene glycol dimethyl ether, ethylene glycol diethyl ether and diethylene glycol diethyl ether.The negative-electrode-free sodium battery electrolyte can achieve the effects of good first-effect exertion and long cycle life.

This invention discloses a method for preparing a photocatalytic antibacterial composite material; the method involves using Sn... 4+ / Ga ND reacts with an aqueous solution of sodium carboxymethyl cellulose (CMC) and undergoes hydrothermal sulfidation to induce the formation of tin vacancies. Single-atom Mo is then assembled at these tin vacancies using an impregnation method combined with heat treatment to obtain SAMo-SnS2 / Ga ND powder. Simultaneously, using natural corn stalk cellulose as a substrate, it is dissolved in the ionic liquid BmimCl. ATBPC monomers are grafted onto the cellulose molecular chain using RAFT controlled graft polymerization technology to prepare a cellulose-based cationic polyelectrolyte PATBPC-co-Cellulose solution. The PATBPC-co-Cellulose solution is then blended with the SAMo-SnS2 / Ga ND powder and regenerated with ether to form a composite antibacterial material. This composite material has shown high efficiency and long-lasting bactericidal activity in antibacterial experiments against multidrug-resistant Escherichia coli and methicillin-resistant Staphylococcus aureus under both light and dark conditions, demonstrating promising application prospects.

The application discloses a preparation method and application of an aflatoxin M1 hapten and a whole antigen, wherein the hapten contains two complete active carboxyl groups and can be firmly combined with more carrier proteins. The aflatoxin M1 hapten is obtained by addition of aflatoxin M1 and dimercaptosuccinic acid under catalysis of boron trifluoride ether; the whole antigen is a covalent combination of the hapten and BSA, is prepared by using an EDC / NHS carboxyl coupling method, and can be used for antibody preparation and AFM1 detection.