18 results about "Dimethoxyethane" patented technology

This invention relates to the field of organic synthesis technology, specifically to a highly efficient and stable Grignard preparation and its green preparation method. By weight, it comprises 8-18 parts of a magnesium source, 40-92 parts of a halogenated hydrocarbon, 150-200 parts of a green solvent, 15-20 parts of ethylene glycol dimethyl ether, and 2.3-3.2 parts of a synergistic stabilizer. The green solvent is 2-methyltetrahydrofuran, or a composite solvent with a weight ratio of 2-methyltetrahydrofuran:methyl tert-butyl ether of 150-160:40-50. The synergistic stabilizer is composed of 1.5-2.0 parts of N,N,N',N'-tetramethylethylenediamine and 0.8-1.2 parts of butylated hydroxytoluene, or composed of 1.5-2.0 parts of N,N,N',N'-tetramethylethylenediamine and 1.0 part of phenothiazine. This invention uses a green solvent system to replace traditional toxic and harmful solvents, and combines it with a solvent recovery process to achieve solvent recycling, which greatly reduces waste emissions and makes the production process safer and more environmentally friendly, in line with the development direction of green chemical industry.

The application relates to the technical field of batteries, in particular to an electrolyte suitable for primary lithium-manganese batteries and a preparation method thereof. The electrolyte comprises propylene carbonate, ethylene carbonate, lithium bisfluorosulfonylimide, lithium perchlorate, lithium bisoxalate borate, terminal bisdifluorophosphorylated oligomeric trimethylene carbonate, ethylene glycol dimethyl ether, lithium difluorooxalate borate and 1,3-propane sultone. The electrolyte is prepared through a pre-coordination and segmented dilution process with specific timing. The electrolyte system can synergistically optimize the electrode interface film forming process, has high discharge capacity retention rate and low direct current resistance at low temperature (-20 DEG C), and has high capacity retention rate after high-temperature storage (60 DEG C), thereby significantly improving the comprehensive performance of the primary lithium-manganese battery in a wide temperature range.

The present application belongs to the field of activators, and particularly relates to an activator for improving the adhesion of yarn and rubber and the use thereof. The activator is composed of 38-68wt% component A: alkyl silane, 24.2-41.2wt% component B: fatty acid polyoxyethylene ester, 5.5-13wt% component C: triethylene glycol dimethyl ether and 0.6-4.7wt% component D: alkyl phenol polyoxyethylene ether. The activator of the present application can improve the adhesion of yarn and rubber.

The application relates to a preparation method and application of a low-temperature-resistant ester-based electrolyte. The method comprises the following steps: firstly, dissolving lithium bistrifluoromethylsulfonylimide into a mixed solution of difluoropropionic acid ethyl ester and fluorinated ethylene carbonate to obtain solution A; secondly, dissolving lithium nitrate into ethylene glycol dimethyl ether to obtain solution B; and thirdly, adding solution B into solution A to obtain the low-temperature-resistant ester-based electrolyte. The weak-solvent electrolyte is composed of three solvents and two lithium salts, the carboxylic acid ester has a low melting point and a strong salt-dissolving capacity, the freezing point of the electrolyte can be significantly reduced, the electrolyte still has strong fluidity at low temperature, the migration rate of lithium ions at low temperature is improved, and the low-temperature performance of the battery is improved. The low-temperature-resistant ester-based electrolyte prepared by the application provides valuable insights for the next-generation electrolyte of lithium ion batteries operated under extreme conditions.

This invention discloses a bio-based high-efficiency antibacterial polyester fiber and its preparation method, belonging to the field of synthetic fiber technology. It solves the problems of high hue, low bio-based content, and weak antibacterial performance in existing technologies. The fiber is copolymerized from a first, second, third, and fourth ester. The first ester is formed by esterification of oxalic acid and 1,3-propanediol; the second ester is formed by esterification of an aliphatic diacid and 1,3-propanediol; the third ester is formed by esterification of a quaternary ammonium salt of hydroxy fatty acids; and the fourth ester is formed by esterification of terephthalic acid and ethylene glycol. This invention uses oxalic acid, aliphatic diacids, 1,3-propanediol, and quaternary ammonium salts of hydroxy fatty acids to prepare polyester fibers, achieving a bio-based carbon content of over 30%. The entire preparation process eliminates the need for diethylene glycol dimethyl ether, a solvent required in existing technologies, thus solving the problem of high hue caused by solvent residue. The fiber maintains highly efficient and long-lasting broad-spectrum antibacterial properties, with an antibacterial rate exceeding 99%.

This invention discloses a composite control device and method for improving the low-temperature performance of energy storage batteries, belonging to the field of energy storage battery technology. This invention solves problems such as battery performance degradation, increased internal resistance, and uneven temperature distribution under low-temperature environments through the synergistic effect of electrolyte system optimization and module-level intelligent temperature control. The antifreeze electrolyte system contains lithium or sodium salts, a basic solvent, and functional additives, including ethylene glycol dimethyl ether, fluoroethylene carbonate, and nano-silica, lowering the electrolyte freezing point to below -40℃. The layered heating-insulation-heat dissipation integrated module adopts a three-layer structure: a bottom heating zone, a middle insulation zone, and a top temperature control zone, combined with phase change materials and a graphene heating film. The intelligent temperature control system dynamically adjusts the heating power based on a PID algorithm, achieving multi-mode switching and ensuring that the temperature deviation within the module is controlled within 2℃. This invention enables the battery to maintain high capacity retention, low internal resistance growth, and good cycle stability in a -40℃ low-temperature environment.

The application discloses a composite coating diaphragm and a preparation method thereof and a secondary battery, and relates to the technical field of secondary batteries.The application provides a composite coating diaphragm with a base film, a hydrophilic support layer of a bottom layer and an electrophilic functional layer of a surface layer, the electrophilic functional layer of the surface layer takes amino-functionalized porous aluminum oxide as a core, is compounded with quaternary ammonium polyether amine and polyethylene glycol dimethyl ether, actively adsorbs electrolyte anions through amino groups and quaternary ammonium groups, and reduces an ion transmission energy barrier; the hydrophilic support layer of the bottom layer is composed of gradient particle size ceramic particles grafted with acrylic acid and sodium carboxymethyl cellulose and polyethylene glycol dimethyl ether, realizes fast spreading and stable storage of electrolyte through hydrophilic groups; the two layers are tightly combined through hydrogen bond action of amino groups and carboxyl groups, form a synergistic system of 'adsorption-spreading-storage', realize synchronous improvement of electrolyte infiltration rate, liquid storage stability, ion conduction efficiency and coating binding force, and adapt to the demand of high-voltage and long cycle life batteries.

Disclosed are an electrolyte solution, a lithium-ion battery, and an electronic product. The electrolyte solution comprises an electrolyte salt and a solvent, wherein the concentration of the electrolyte salt is 0.1-5 mol / L, and the ether solvent comprises one or more of dimethoxymethane, diethoxymethane, 1,2-diethoxyethane, 1,3-dioxolane, 1,3-dioxane, 1,4-dioxane, tetrahydrofuran, 2-methyltetrahydrofuran, tetrahydropyran, diethyl ether, cyclopentyl methyl ether, triethylene glycol dimethyl ether, and tetraethylene glycol dimethyl ether. By selecting an ether solvent having a weak lithium salt dissolution capability, the electrolyte solution enables the formation of contact ion pairs and aggregated ion pairs at a low concentration, reducing co-intercalation behavior in the electrolyte solution, thereby achieving better low-temperature stability, and being suitable for use in a low-temperature environment.

This invention relates to the field of electrolyte technology, specifically to a non-aqueous electrolyte for dual-anionic magnesium salt fuel cells, comprising the following components: a composite salt, a mixed solvent, magnesium fluoride (MgF₂) nanoparticles, 1,3-dioxolane (DOL), diethylene glycol dimethyl ether (G2), and trimethyl phosphate (TMP). This invention utilizes a composite salt system composed of magnesium trifluoromethanesulfonate and magnesium bis(trifluoromethanesulfonyl)imide, which significantly enhances the ion transport capacity of the electrolyte through a dual-anionic synergistic effect.

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 lithium nitrate sustained-release membrane, its preparation method, and its application, belonging to the field of sustained-release membrane technology. The preparation method includes the following steps: uniformly mixing a lithium nitrate solution and a polyvinylidene fluoride-hexafluoropropylene copolymer solution, and then preparing the membrane using a casting method. This invention uses lithium nitrate as a raw material and prepares the sustained-release membrane by casting it with polyvinylidene fluoride-hexafluoropropylene copolymer. The production process is simple and low-cost, and it can be rapidly formed at room temperature. The resulting sustained-release membrane can effectively protect Al foil, preventing Al corrosion, and its application effect is significant. By introducing lithium nitrate using ethylene glycol dimethyl ether, the solubility of lithium nitrate is maximized, resulting in a high-concentration lithium nitrate sustained-release membrane. Applying this membrane to protect against Al corrosion can more effectively protect Al foil and improve the performance stability of Li-Al batteries.

According to one embodiment, a method of synthesizing an organometallic iridium monomer compound includes obtaining a dimeric iridium compound having a halogenated bridge, refluxing a mixture comprising the dimeric iridium compound, a base, an ancillary ligand, and 1,2-dimethoxyethane for forming a precipitate of an organometallic iridium monomer, and filtering the refluxed mixture to collect the organometallic iridium monomer precipitate.

The application discloses a kind of electrolyte for graphite negative electrode sodium ion battery, belong to new energy battery technical field.Electrolyte is composed of organic solvent, sodium salt and additive, organic solvent is one or more in diethylene glycol dimethyl ether, ethylene glycol dimethyl ether, tetraethylene glycol dimethyl ether, sodium salt is one or more in sodium hexafluorophosphate, sodium tetrafluoroborate, sodium difluorosulfonylimide, additive is one or more in sodium dicyanoguanidine, sodium cyanurate.By the polycyanogen conjugated structure of additive, form coordination bond-π bond synergic anchoring effect between graphite layers and make graphite interlayer spacing expand;Meanwhile, form dense and stable SEI film on the negative electrode surface, inhibit sodium dendrite growth.Electrolyte has good initial charge capacity, capacity retention rate after 3000 cycles, 5C rate capacity retention rate and thermal safety temperature, solve the technical problems of traditional electrolyte interface film loose, poor cycle stability, poor rate performance and insufficient thermal stability.

The application provides a non-water absorbent, a preparation method thereof and a CO2 capture method for dry associated gas in an oil and gas field. The raw material composition of the non-water absorbent comprises 1-40 wt% of an imidazole substance, 0.5-15% of metal organic framework compound nanoparticles and 50-98.5% of an organic solvent; the imidazole substance comprises at least one of imidazole, 1-methyl imidazole and 2-methyl imidazole; the metal organic framework compound nanoparticles comprise at least one of ZIF-8, ZIF-67 and CALF-20; and the organic solvent comprises at least one of ethylene glycol, 1,3-dimethyl-2-imidazolidinone, propylene carbonate, N,N-dimethylacetamide, polyethylene glycol dimethyl ether, isohexadecane, N-methyl pyrrolidone, 1,3-dimethylpropylene urea, dimethyl sulfoxide and sulfolane. The non-water absorbent provided by the application can realize effective separation of CO2 and C 2+ gas hydrocarbons.

This invention belongs to the field of chemical synthesis technology, specifically relating to a method for the direct-directed nickel-catalyzed Markovnikov hydroynkylation of amino groups to synthesize γ-ynylamines from non-activated olefins. The method includes mixing ethylene glycol dimethyl ether dibromide, ethylenediamine ligands, 3-en-1 amine compounds, potassium benzoate, trimethoxysilane, ynyl bromide, and an ether solvent. The resulting mixture undergoes a Markovnikov hydroynkylation reaction to yield γ-ynylamine compounds. This reaction utilizes inexpensive and readily available nickel catalysts (such as NiBr2·DME) and hydroxyl sources (such as (MeO)3SiH) under mild conditions, and is compatible with tertiary cyclic / acyclic amines and secondary alkyl / aryl amine substrates, as well as aryl, alkyl, and silyl-substituted ynkylation reagents, achieving a broad substrate applicability. Furthermore, this preparation method exhibits mild reaction conditions, good regioselectivity, and low cost, demonstrating excellent industrialization potential.

A secondary battery is provided and including a positive electrode, a negative electrode, and an electrolytic solution, where the negative electrode is metal lithium, and the electrolytic solution contains a sulfonyl group-containing lithium salt; a glyme-based solvent; and a specific additive.