170 results about "Tetraethylammonium" patented technology

The polishing compound for semiconductor wafer of the present invention contains colloidal silica composed of silica particles to which tetraethylammonium is fixed, and concentration of silica particles dispersed in water is between 0.5 to 50 weight %. Concentration of tetraethylammonium contained in silica particles to which tetraethylammonium is fixed is desirable to be in the range from 5x10-4 to 2.5x10-2 as indicated by molar ratio of tetraethylammonium/silica.

The invention discloses a method for compounding Beta zeolite with a low Si/Al ratio, which comprises the following steps: reaction mixture which is formed by mixing the Beta zeolite with a Si/Al molar ratio of 25 to 30 with aluminum source, positive ion source of tetraethylammonium and water, is crystallized for 0.5 to 2 days in a water temperature of 135 to 170 DEG C; wherein, the molar ratio of the reaction mixture is SiO2A12O3=4-15, TEAOH/SiO2=0 to 0.10, H2OSiO2=5.0 to 8.0.The Beta zeolite compounded by the method is characterized in that framework Si/Al ratio is 4 to 15, acid central density of the Beta zeolite is increased, thereby increasing activity and stability of the catalyst in a high space velocity.

Double-layer capacitors capable of operating at extremely low temperatures (e.g., as low as −75° C.) are disclosed. Electrolyte solutions combining a base solvent (e.g., acetonitrile) and a cosolvent are employed to lower the melting point of the base electrolyte. Example cosolvents include methyl formate, ethyl acetate, methyl acetate, propionitrile, butyronitrile, and 1,3-dioxolane. An optimized concentration (e.g., 0.10 M to 0.75 M) of salt, such as tetraethylammonium tetrafluoroborate, is disolved into the electrolyte solution. In some cases (e.g., 1,3-dioxolane cosolvent) additives, such as 2% by volume triethylamine, may be included in the solvent mixture to prevent polymerization of the solution. Conventional device form factors and structural elements (e.g., porous carbon electrodes and a polyethylene separator) may be employed.

The invention belongs to the field of synthesis of aluminosilicate zeolite molecular sieves, and relates to a Beta zeolite molecular sieve synthesis method. The Beta zeolite molecular sieve synthesis method is characterized in that a Beta zeolite crystal seed is in high-temperature hydrothermal treatment at first, then the Beta zeolite crystal seed after hydrothermal treatment is in dipping treatment in acid liquor when stirred, and the crystal seed after acid treatment is washed by water to be neutral; and finally, a silicon source, an aluminum source, a sodium source, a tetraethylammonium cation source and water are prepared to form uniform gel, the pretreated beta zeolite crystal seed is added into the gel, and obtained uniform gel is crystallized in a stainless steel reaction kettle. The beta zeolite molecular sieve synthesis method has the advantages that Beta zeolite is used as the crystal seed after the high-temperature hydrothermal treatment and the acid liquor treatment, a structural guidance effect of the Beta zeolite can be realized better, a Beta zeolite product with excellent crystallinity can be synthesized under conditions of low usage of structural-directing agent and wide silicon-aluminum ratio range, accordingly, crystal seeds are not limited in nanometer level granularity, and applicable range of the crystal seeds is greatly widened.

The present invention relates to a pharmaceutical formulation comprising a polypeptide and a buffer selected from the group consisting of diethylmalonic acid, trimellitic acid, shikimic acid, glycinamid, 2-amino-2-methyl-1,3-propanediol (AMPD) and tetraethylammonium (T.E.A.) or salts thereof. Further more the invention relates to a method for improving stability of a polypeptide in a purification process comprising the step of applying a buffer selected from the group consisting of diethylmalonic acid, trimellitic acid, shikimic acid, glycinamid, AMPD and T.E.A. or salts thereof to said purification process.

The invention discloses a method for preparing beta zeolite. The method is low in cost and high in efficiency. The method specifically comprises the following steps of: adding a sodium source, an aluminum source, a template agent, and an organic accelerator and/or inorganic accelerator into water, stirring uniformly and mixing the mixture and a silicon source, and violently stirring until the system materials form a uniformly dispersed mixture; and crystallizing the reaction mixture and filtering a crystallization product, washing and drying to obtain the beta zeolite with relatively high crystallinity. The method has the characteristics that: the using amount of a tetraethylammonium cation template agent is reduced by adding the organic accelerator and/or inorganic accelerator, the solid content in a synthesis system is high, the crystallization time is short, and the single-kettle yield of the product is high, so that the synthesis cost of the beta zeolite can be reduced.

The invention discloses a method for preparing high-purity tetraethylammonium hydroxide by continuous electrolysis. The method comprises the following steps: placing tetraethylammonium salt aqueous liquor with the raw material concentration of 30-50% in an anode chamber of a two-chamber one-membrane ionic membrane electrolysis device, adding tetraethylammonium hydroxide with the concentration of 2-5% into a cathode chamber of the device, and communicating current between an anode plate and a cathode plate, wherein in the anode chamber, tetraethylammonium salt is hydrolyzed to generate cation (CH3CH2)4N<+> and anion X<->, the cations (CH3CH2)4N<+> and H<+> and a metal cation Rn<+> in the liquor enter the cathode chamber through a cation exchange membrane, and the anions X<-> and OH<-> reach the anode plate to generate a gas; in the cathode chamber, tetraethylammonium hydroxide is produced from the cation (CH3CH2)4N<+> and OH<-> obtained by water hydrolysis, H<+> reaches the cathode plate to obtain electrons to generate H2, and tetraethylammonium hydroxide with the concentration of 5-30% is obtained. According to the method disclosed by the invention, feed and discharge are continuously carried out, and the concentrations of the materials in the anode and cathode chambers are relatively constant, so that the current efficiency and the product conversion ratio are improved, and the energy consumption is lowered.

The invention relates to an ultralow-molecular weight intercalation inhibitor and a preparation method thereof. The ultralow-molecular weight intercalation inhibitor contains any one or more of amino triethylamine, ethylenediamine tetraethylammonium and diethylenetriamine pentaethylamine and is prepared from the component and clear water in a ratio of 0.5-3%; the amino triethylamine is synthesized from nitrilotriacetic acid; the ethylenediamine tetraethylammonium is synthesized from ethylenediamine tetraacetic acid; and the diethylenetriamine pentaethylamine is synthesized from diethylenetriamine pentaacetic acid; and the preparation method comprises the following steps: adding the raw materials into absolute ethyl alcohol; adding concentrated sulfuric acid for reacting; adding an organic solvent and introducing ammonia water; and stirring and distilling to obtain the product. According to the invention, the inhibition performance of a drilling fluid system can be remarkably improved, the temperature resistance exceeds 240 DEG C, the needs of ultra-deep well drilling are completely met, and the problem of unstable well wall caused by shale hydration and dispersion is effectively reduced; and moreover, the synthesis technology is simple and environment-friendly, the yield is relatively high, the production cost is low, and the ultralow-molecular weight intercalation inhibitor is suitable for industrial production.

A method for synthesizing the all-silica zeolite beta with small crystal size is disclosed. This method comprises the steps of: (a) forming a reaction mixture comprising (1) a source of silicon dioxide (SiO₂), (2) a source of fluoride ions (F⁻), (3) a source of tetraethylammonium cations (TEA⁺), and (4) water (H₂O), at predetermined mole ratios of the source of silicon dioxide, the source of fluoride ions, the source of tetraethylammonium cations, and water; (b) crystallizing the reaction mixture; and (c) recovering the crystalline material formed, wherein the pH of the mixture before crystallization has a value of 6 to 9, and the pH of the mixture after crystallization has a value of 6 to 8. This improved method gives a fast and efficient way of synthesis of all-silica zeolite beta with an average crystal size of less than 5 μm.

The invention discloses low-temperature electrolyte for a supercapacitor and a preparation method thereof. The electrolyte comprises solute and non-aqueous organic solvent. The solute is ionic liquid tetraethylammonium-oxalate-difluoro-borate (TEAODFB) which is battery-grade TEAODFB obtained by purifying a product of reaction of a chlorine-containing compound, an oxalate-containing compound and a fluoroboric acid containing compound in acetonitrile or carbonic ester medium by adopting a method of reduced pressure evaporation or low-temperature recrystallization. The non-aqueous organic solvent is one or the combination of acetonitrile, propionitrile, methoxy propionitrile, ethylene carbonate, propylene carbonate, dimethyl carbonate, diethyl carbonate, methyl ethyl carbonate, gamma-butyrolactone, N,N-dimetbylformamide, tetrahydrofuran and sulfolane. The concentration of the adopted electrolyte is 0.8 to 2mol/L. The obtained low-temperature electrolyte has high specific capacity and charge/discharge cyclic life at the temperature of 30 DEG C below zero.

The invention discloses a preparation of a natural nutshell carbon material and an application of the natural nutshell carbon material in electrochemical capacitors. The preparation of the natural nutshell carbon material refers to performing carbonization-alkali activation on a natural nutshell at high temperature to obtain a porous nano nutshell carbon material. In an alkali aqueous solution electrolyte, the specific capacitances of double electric layers respectively reach 312Fg<-1> and 224Fg<-1> under the potential scan rates of 2mV/s and 500mV/s. When organic electrolyte uses 1M tetraethylammonium tetrafluoroborate as an electrolyte, the capacitances respectively reach 209Fg<-1> and 50Fg<-1> under the potential scan rates of 10mVs(-1) and 500mVs(-1). Under a high scanning rate, the specific capacitance is relatively stable, which suggests that the natural nutshell carbon material has very broad application prospects as a high-power super capacitor active material. Moreover, as the material is natural biological material pistachio nut shell, the range of sources is wide, and the price is low. In addition, the electrode material preparation process is simple and controllable, the condition is mild, the equipment is simple, and the preparation process has practical production values.

The invention provides a low-temperature electrolyte for a lithium iron phosphate battery. The low-temperature electrolyte is prepared from the following raw materials: an electrolyte lithium salt, an organic solvent and a low-temperature additive, wherein the low-temperature additive is at least one of triethanolamine, tetraethylammonium tetrafluoroborate, 12-crown (ether)-4, 15-crown (ether)-5 and 18-crown (ether)-6; and the mass of the low-temperature additive is 0.1%-5% of total mass of the electrolyte. By the low-temperature electrolyte, the low-temperature performance of the battery is effectively improved.

The invention discloses a low-temperature lithium ion battery electrolyte and a lithium ion battery based on a surfactant, which comprises an organic solvent, a lithium salt electrolyte, a surfactantand a film forming additive, wherein the surfactant is octane sulfonate tetraethylammonium salt and derivatives thereof. The invention selects the solvent ratio with low viscosity through the screening combination of the solvents; Vinylene carbonate combined with vinyl sulfate DTD or lithium difluorosulfonimide LiFSI as film forming additive can form low impedance SEI film on the surface of negative electrode. Finally, a small amount of surfactant was added to optimize the viscosity of the electrolyte, and the electrolyte system has good compatibility with the positive and negative electrode materials, and can improve the low-temperature discharge and cycle performance of the lithium ion battery under the low-temperature application environment. The electrolyte system has the advantages oflow viscosity and high conductivity under the low-temperature condition, and the kinetics of lithium ion is improved.

The invention relates to a method for preparing a mordenite/Zeolite Socony Mobil (ZSM)-5 composite molecular sieve, which comprises the following steps: evenly mixing sodium hydroxide, tetraethylammonium bromide and deionized water; adding mordenite or ZSM-5 seed crystal, wherein the seed crystal addition volume is 5wt% of total feeding material SiO2; carrying out ultrasonic vibration for 30min to evenly disperse the seed crystal; then, adding kaolin microspheres and white carbon black; stirring for half an hour, and transferring gel into a polytetrafluoroethylene reaction kettle; and then transferring the gel into an oven after ageing at the room temperature for 10-40h and crystallizing at the temperature of 110-170DEG C for 14-70h. A reaction system is formed at the following molar ratio: SiO2/Al2O3 is equal to 10-60, Na2O/SiO2 is equal to 0.029-0.31, tetraethylammonium (TEA)+/SiO2 is more than or equal to 0.02, and H2O/SiO2 is equal to 5.0-30.0. In the method, only the single seedcrystal needs to be added to obtain a product which can be directly used for fluid catalytic cracking (FCC) reaction after being slightly modified.

The invention discloses an organic phase electrolyte and an application thereof in a negative electrode of a redox flow battery. The organic phase electrolyte consists of active materials, a supporting electrolyte and an organic solvent, wherein the active materials are diphenyl ketone and a derivative thereof, anthrone and a derivative thereof, or dibenzoyl methane and a derivative thereof; the supporting electrolyte is selected from tetraethylammonium hexafluorophosphate, tetraethylammonium tetrafluoroborate, tetrabutylammonium hexafluorophosphate or tetrabutylammonium tetrafluoroborate; and the organic solvent is selected from acetonitrile, tetrahydrofuran, propylene carbonate, ethylene carbonate, dimethyl sulfoxide, dimethylformamide, glycol dimethyl ether or ethylene glycol diethyl ether. The organic phase electrolyte disclosed by the invention has relatively low electrochemical potential and high electrochemical property; when the organic phase electrolyte is used as the negative electrode electrolyte of the redox flow battery for assembling an organic phase redox flow battery, relatively high open-circuit voltage can be realized, so that the energy density of the battery can be improved; and meanwhile, the capacity fading of the battery can be lowered, so that the cycle life of the battery can be prolonged.

The invention discloses a metallic paint which comprises the following raw materials in parts by mass: 1-4 parts of potassium hydroxide, 2-3 parts of benzotriazole, 1-2 parts of melamine, 2-6 parts of 12-hydroxystearic acid, 3-5 parts of methyl methacrylate, 2-5 parts of sodium lauryl sulfate, 3-7 parts of p-tert-pentyl phenol, 1-3 parts of tetraethylammonium tetrafluoroborate, 2-4 parts of benzyltriphenyl phosphorus chloride, 1-2 parts of trifluoroacetylacetone cobalt and 3-6 parts of methylene bromide. The metallic paint disclosed by the invention has the advantages of stable use effect, strong corrosion resistance, low surface damage tendency, favorable wear resistance and favorable punching property, can obviously prolong the service life, and is safe and nontoxic for the human body.

The invention discloses a preparation method of a Cu2Se-Pd hybrid material and a prepared material. A copper source is tetrachloro cupric (II) acid tetraethylammonium, and a selenium source is a mixed liquid formed by dissolving SeO2 into terpilenol. The preparation method comprises the following steps: performing reaction in DMPU (dimethyl propyl urea) to obtain hexagonal phase CuSe or cubic phase Cu2-XSe by virtue of adopting a solid-liquid phase synthetic method; further extracting a product by virtue of TOP to obtain mono-clinic phase Cu2Se; compounding the mono-clinic phase Cu2Se with noble metal Pd to prepare the Cu2Se-Pd hybrid material. The method disclosed by the invention can be used for synthesizing the nano-level Cu2Se-Pd hybrid material under normal pressure and relatively low temperature, and is simple in process and short in reaction time; the prepared hybrid material can be used as an SERS (surface enhanced raman spectroscopy) substrate so as to be applied to SERS detection 4-Mpy, and is strong in response signal and high in selectivity; the limit of detection can reach 10<-9>molL<-1>. Compared with independent semiconductor Cu2Se and metal Pd, the Cu2Se-Pd hybrid material shows more excellent SERS performances.

The present invention relates to a process for the direct synthesis of a material with a CHA zeolite structure in the silicoaluminate form thereof containing copper atoms, which comprises at least the following steps:

• • (i) Preparation of a mixture which contains at least one water source, one copper source, one polyamine, one source of Y tetravalent element, one source of X trivalent element, the tetraethylammonium cation as the only OSDA and one source of alkaline or alkaline earth (A) cations, and wherein the synthesis mixture has the following molar composition:
    • YO₂:a X₂O₃:b OSDA:c A:d H₂O:e Cu:f polyamine
  • (ii) Crystallization of the mixture obtained in (i) in a reactor;
  • (iii) Recovery of the crystalline material obtained in (ii).

The invention relates to a non-animal-origin frozen semen diluent, and relates to a frozen semen diluent prepared with non animal-origin component. The diluent is used for preparing cattle and sheep frozen semen. In prior arts, adopted frozen semen contains animal-origin components, and prepared frozen semen has the defects of low motility and short survival time, low intact acrosome rate of thin tube frozen semen, and large amount of pathogenic micro-organisms after thawing. With the diluent provided by the invention, the problems are solved. The diluent is prepared from the components of, by mass, 3.412 g of lactose, 0.5 g of sucrose, 0.9 g of glucose, 0.61 g of trehalose, 0.53 g of citric acid, 0.403 g of acetic acid tetraethylammonium, 1.425 g of tris(hydroxymethyl) aminomethanegrams, 0.375 g of tri-sodium citrate, 5.2 ml of ethylene glycol, 100 ml of double-distilled water, and 0.88 g of phospholipids powder. With the diluent, prepared frozen semen has the advantages of high motility and long survival time, high intact acrosome rate of thin tube frozen semen, and small amount of pathogenic micro-organisms after thawing.

The embodiment of the invention provides a super capacitor and a preparation method thereof. Electrolyte of the super capacitor provided by the invention adopts the mixture of propylene carbonate and acetonitrile the volume ratio of which is 5-20:80-95 as a mixed solvent of the electrolyte. The super capacitor adopts tetraethylammonium tetrafluoroborate as a solute. The electrolyte has low melting point, thus, the super capacitor cannot have phenomenon of electrolyte solidification at low temperature, has high electric conductivity and fulfills the aim of normally working at low temperature.

The invention relates to the technical field of high-entropy alloys and discloses a six-element high-entropy alloy with a first-order magnetic phase transition and a preparation method thereof. The six-element high-entropy alloy with the first-order magnetic phase transition has a general formula structure of MgaMnbFecCodNieGdf and is obtained by electrochemical reduction deposition, wherein an electrolyte in the electrochemical reduction deposition comprises the following components: dimethyl sulfoxide, tetraethylammonium hexafluorophosphate, vitamin C, GdCl3, FeCl2, CoCl2, NiCl2, MnCl2 and MgCl2. The prepared alloy is an amorphous alloy, the magnetic transition of the prepared alloy is the magnetic transition caused by strong electron correlation without being restrained by the crystal form transformation of a material, and therefore, the high-entropy alloy has the advantages of large temperature range of magnetic phase transition, controllable critical transition temperature and reversibility.

The invention belongs to the technical field of a lithium ion battery, in particular relates to an electrolyte of a lithium ion power battery. In the electrolyte, at least two of vinylene carbonate, tetraethylammonium tetrafluoroborate, triethylmethylammonium tetrafluoroborate and fluoboric acid volution quaternary ammonium salt are taken as additives, and the additives account for 0.01-5wt%. The content of hydrofluoric acid of the electrolyte can be controlled to a low level even to be zero; the tetrafluoroborate ammonium salt is beneficial for improving the dissociation of anions and cations and also can be taken as a constituent of a solid electrolyte interface (SEI) membrane of the battery for use; the cations are tetrafluoroborate and are ingredient of lithium tetrafluoroborate of a lithium salt for the battery electrolyte; and the charging and discharging cycle performance of the battery is improved. By combining respective characteristics of a supercapacitor electrolyte and the electrolyte of the lithium ion battery, high conductivity of the electrolyte for the lithium ion battery is achieved; and with the initial charging and discharging process of the lithium ion battery, the structure of the SEI membrane is improved, and high capacity and a circulation effect of the lithium ion battery are achieved.

The invention discloses a synthesis method for a Silicalite-1 molecular sieve, wherein the method comprises the following steps: (1) mixing evenly a silicon source, a structure directing agent, a mineralizer and water, to obtain a reaction mixture with the molar ratio of OH<->:SiO2:R:F:H2O=(0.05-5):1:(0.05-0.39):(0.05-5):(2-100), wherein R represents the mole number of the structure directing agent, F represents the mole number of the mineralizer, and the structure directing agent is at least one selected from the group consisting of tetraethylammonium hydroxide, tetraethylammonium bromide, tetraethylammonium chloride, tetraethylammonium fluoride, tetraethylammonium iodide and triethylamine; (2) transferring the reaction mixture obtained in the step (1) to a pressureproof airtight container, crystallizing for 0.5-60 days at the temperature of 80-200 DEG C and at the self-generated pressure, to obtain a crystallized product; and (3) recycling the crystallized product obtained in the step (2). By the synthesis method, the Silicalite-1 molecular sieve with uniform and perfect crystal grains can be synthesized under the action of the novel structure directing agent.

An UV polishing and priming-free UV coating is prepared by raw materials in parts by weight as follows: 35-40 parts of epoxy acrylate, 20-25 parts of polyether acrylate, 10-12 parts of trimethylolpropane triacrylate, 5-8 parts of isobornyl acrylate, 1-2 parts of triethanolamine, 3-4 parts of tert-amylphenol, 1-3 parts of tetraethylammonium tetrafluoroborate, 2-4 parts of benzyltriphenylphospho, 1-2 parts of trifluoro acetyl acetone, 4-5 parts of 2,4,6-trimethyl benzoyldiphenyl phosphine oxide, 2-3 parts of benzil dimethyl ketal and 4-5 parts of a dispersing auxiliary. The UV coating has excellent water resistance, hot water resistance, drug resistance, caking property, toughness and flame retardant property, has excellent binding property with printing ink, and has the characteristics of high glossiness, good levelling property, small flavor, good wear resistance and the like; and only one procedure is required when UV gloss oil is adopted for UV polishing, the priming step is omitted, the operation cost is saved, and the work efficiency is improved.