4282 results about "Oxalate" patented technology

This invention provides an amorphous oxide semiconductor thin film, which is insoluble in a phosphoric acid-based etching solution and is soluble in an oxalic acid-based etching solution by optimizing the amounts of indium, tin, and zinc, a method of producing the amorphous oxide semiconductor thin film, etc. An image display device (1) comprises a glass substrate (10), a liquid crystal (40) as a light control element, a bottom gate-type thin film transistor (1) for driving the liquid crystal (40), a pixel electrode (30), and an opposing electrode (50). The amorphous oxide semiconductor thin film (2) in the bottom gate-type thin film transistor (1) has a carrier density of less than 10⁺¹⁸ cm⁻³, is insoluble in a phosphoric acid-based etching liquid, and is soluble in an oxalic acid-based etching liquid.

The invention discloses a method for preparing diethyl oxalate by CO coupling reaction. By applying a gas phase method, CO is coordinated with ethyl nitrite and is catalyzed by bimetallic supported catalyzer to couplingly generate crude diethyl oxalate, the reaction is a self-sealing circulation process, the CO gas mixed with the ethyl nitrite coming from a regeneration reactor is preheated and then enters into a coupling reactor, after the reaction, the gas is separated by condensation, so that the colorless and transparent condensed diethyl oxalate liquid is produced, and the uncondensed gas containing NO enters into the regeneration reactor to react with ethanol and oxygen in order to generate ethyl nitrite which is again circulated back to the coupling reactor for continuous use. The invention is carried out on the basis of previous laboratory research and under the background of industrial production and fulfils the continuous run examination of the bench scale test and pilot magnification under the condition of industrial operation, the temperature of the coupling reaction is low, and the concentration of products is increased. The method has the advantages of more energy saving, no pollution and high benefit. The total conversion rate of the CO generated by reaction is one hundred percent, and the selectivity of diethyl oxalate is over ninety six percent.

A catalyst for hydrogenated synthesis of glycol with oxalate and a preparation method for the catalyst belong to the glycol preparation technical field. The catalyst of the present invention uses the copper metal as the main active component, and zinc as the promoter, and is manufactured with the method of deposition. A carrier of the catalyst is the modified silica sol. The select content of the copper metal is 5 to 45 percent of the carrier weight, and the optimal content of the copper metal is 10 to 40 percent. The content of zinc metal is 0.1 to 15 percent of the carrier weight, and the optimal content of zinc metal is 1 to 8.0 percent. The select specific surface area of the carrier is 90-350m²/g, and the optimal is 150-300m²/g. Proven by experiments, the catalyst is provided with the very high reaction activity and glycollate selectivity in the reaction to synthesize glycollate with oxalate and hydrogen Moreover, the catalyst is provided with the long usable life and the stable reaction performance, and can be easily controlled.

A lithium battery includes an electrolyte comprised of a non-aqueous solvent, and a salt mixture. The salt mixture includes an alkali metal electrolyte salt and an additive salt having an anion of a mixed anhydride of oxalic acid and boric acid. Specific additive salts include lithium bis(oxalato) borate and lithium oxalyldifluoroborate. Particular electrolyte salts comprise LiPF₆ and LiBF₄. The additive salt is present in an amount of 0.1–60 mole percent of the total of the additive salt and electrolyte salt content of the electrolyte. Also disclosed is a method for enhancing the performance characteristics of a lithium battery through the use of the electrolyte composition. Also disclosed is the compound lithium oxalyldifluoroborate.

The invention relates to a method of preparing a solution containing colloidal particles which contain crystalline titanium dioxide wherein one or more hydrolysable titanium-containing compound(s) is stabilised by oxalic acid in a reaction medium. The reaction further relates to the preparation of titania materials (including particulate materials, coating solutions and films) which comprise or include anatase phase titania, and so are suitable in photocatalytic applications. The invention also deals with a method of preparing B-phase titania.

This invention encompasses methods of producing a colored oxide layer on an aluminum material by anodizing the aluminum material in an electrolyte comprising water, sulfuric acid and oxalic acid. The anodizing step comprises passing at least two sequential current densities through the electrolyte. Methods of making and using article with a colored oxide layer on an aluminum material make by the methods disclosed herein are also disclosed.

The present invention relates to the preparation of hyperstable Y-type RE molecular sieve for the catalytic cracking of heavy oil and containnig vanadium resisting component. The preparation uses NaY-type molecular sieve as main material and chemical aluminum-eliminating complex containing oxalic acid and/or oxalate and its mixture and through introducing RE ion in the late stage of chemical aluminum elimination reaction to from RE precipitate and hydrothermal treatment to realize hyperstabilizing and introduce RE ion and independent phase Re oxide. The formed precipitate RE precursor includes RE oxalate. Compared with conventional REY, REHY and REUSY, the molecular sieve preparing process is simple and high in RE utilization, and has homogeneously distributed aluminum, more secondary pores high hydrothermal stability, high activity and high vanadium contamination resisting capacity.

The invention provides a plastic compound, which comprises a plastic substrate component and a catalyst component, wherein the catalyst component is selected from one kind or two or more kinds of oxides of the metal elements in the ninth line, the tenth line and the eleventh line of the periodic table of elements except copper, silicates, borates and oxalates of the metal elements in the ninth line, the tenth line and the eleventh line of the periodic table of elements, hydrogenation catalysts with the metal elements in the ninth line, the tenth line and the eleventh line of the periodic table of elements and ABO2 type compound oxides with a delafossite structure; A is selected from one kind of the metal elements in the ninth line, the tenth line and the eleventh line of the periodic table of elements, B is Ni, Mn, Cr, Al or Fe, and A and B are different from each other. The invention also relates to application of the plastic compound in the selective metallization of a plastic surface. Moreover, the invention provides a method of the selective metallization of the plastic surface. When the method is applied, the circuit can be further easily formed.

A dishwasher detergent containing a builder and one or more magnesium and/or zinc salt(s) of at least one monomeric and/or polymeric organic acid, excluding zinc ricinoleate, zinc abietate, and zinc oxalate. A method of inhibiting glass corrosion by treatment with one or more salts of magnesium and/or zinc with organic acids, excluding formic acid, acetic acid, gluconic acid, and oxalic acid.

A catalyst for hydrogenated synthesis of glycollate with oxalate and a preparation method for the catalyst belong to the glycollate preparation technical field. The catalyst of the present invention uses the copper metal as the main active component, and silver as the promoter, and is manufactured with the method of immersion. A carrier of the catalyst is the modified silica sol. The select content of the copper metal is 5 to 45 percent of the carrier weight, and the optimal content of the copper metal is 10 to 40 percent. The content of silver metal is 0.1 to 15 percent of the carrier weight, and the optimal content of silver metal is 1 to 8.0 percent. The select carrier is the silica sol with a double peak pore distribution structure and the specific surface area of the carrier is 100-300m²/g; and the optimal specific surface area of the carrier is 120-240m²/g. The present invention settles the problem of applying a Cr/Cu catalyst in the oxalate gas-phase catalytic hydrogenation. Proven by experiments, the catalyst is provided with the very high reaction activity and glycollate selectivity in the reaction to synthesize glycollate with oxalate and hydrogen Moreover, the catalyst is provided with the long usable life and the stable reaction performance, and can be easily controlled.

A process and apparatus for synthesizing a nanopowder is presented. In particular, a process for the synthesis of nanopowders of various materials such as metals, alloys, ceramics and composites by induction plasma technology, using organometallic compounds, chlorides, bromides, fluorides, iodides, nitrites, nitrates, oxalates and carbonates as precursors is disclosed. The process comprises feeding a reactant material into a plasma torch in which is generated a plasma flow having a temperature sufficiently high to yield a superheated vapour of the material; transporting said vapour by means of the plasma flow into a quenching zone; injecting a cold quench gas into the plasma flow in the quenching zone to form a renewable gaseous cold front; and forming a nanopowder at the interface between the renewable gaseous cold front and the plasma flow.

An aqueous metal etching composition useful for removal of metals such as nickel, cobalt, titanium, tungsten, and alloys thereof, after formation of metal silicides via rapid thermal annealing during complementary metal-oxide-semiconductor (CMOS) transistor fabrication. The aqueous metal etching composition is also useful for selective removal of metal silicides and/or metal nitrides for wafer re-work. In one formulation, the aqueous metal etching composition contains oxalic acid, and a chloride-containing compound, and in other formulations, the composition contains an oxidizer, such as hydrogen peroxide, and a fluoride source, e.g., borofluoric acid. The composition in another specific formulation contains borofluoric acid and boric acid for effective etching of nickel, cobalt, titanium, tungsten, metal alloys, metal silicides and metal nitrides, without attacking the dielectric and the substrate.

The invention discloses a high-capacity lithium-ion battery electrolyte of considering high-and-low temperature performance. The electrolyte comprises a non-aqueous solvent, lithium hexafluorophate, a negative film-forming additive, an inflatable inhibition additive and a low-impedance additive, wherein the negative film-forming additive is prepared from fluoroethylene carbonate which accounts for 3%-15% of total mass of the electrolyte; the inflatable inhibition additive is prepared from one or two of 1,3-propene sultone or anhydride compounds which account for 0.3%-5% of total mass of the electrolyte; and the low-impedance additive is prepared from one or two of lithium difluorophosphate and difluoride phosphate lithium oxalate which account for 0.2%-3% of total mass of the electrolyte. The electrolyte is suitable for a high-nickel positive electrode and silicon-carbon composite negative electrode lithium-ion battery; the high-temperature storage performance and the low-temperature discharge performance of the lithium-ion battery are improved while the room-temperature cycle performance is considered; and meanwhile, the invention further provides a preparation method of the electrolyte and the high-capacity lithium-ion battery of using the electrolyte.

The supported noble metal catalyst has any one of Ru, Rh, Pd, Os, Ir, Pt, Au, Ag, Cu and Ni as the active component; and any one of active carbon, graphite, carbon nanotube, Al2O3, SiO2, molecular sieve, MgO and TiO2 as the carrier. Its active component accounts for 0.1-90 % and metal particle size of 0.5-6 nm. The preparation process includes dispersing the active component, hydroxide or carbonate of alkali metal or alkali earth metal and carrier in solvent separately; mixing in certain proportion, heating the solution, adding nitric acid, sulfuric acid, hydrochloric acid, oxalic acid or acetic acid as precipitation promoter; and stoving. The catalyst is used as catalyst for fuel cell and makes the fuel cell possess high performance.

The invention relates to the field of chemical technology, in particular to a method for preparing a catalyst for hydrogenating dimethyl oxalate to prepare glycol. The method comprises the following steps: step one, copper nitrate is used to prepare a cuprammonium complex compound; step two, the cuprammonium complex compound is added with a mesoporous silica molecular sieve, is dripped with distilled water, and is filtered, washed, dried and roasted to prepare a catalyst precursor; and step three, the catalyst precursor is reduced in a hydrogen-nitrogen mixed atmosphere to prepare the catalyst. In the catalyst, according to mass percentage, the content of copper is between 5 and 40 percent; and the content of the mesoporous silica molecular sieve is between 60 and 95 percent. The method has the advantages that a silicon copper catalyst prepared through the new method has high catalytic activity and glycol selectivity in the reaction of hydrogenating the dimethyl oxalate to prepare the glycol, has long service life, smooth reaction performance and easy control.

The invention discloses high-voltage electrolyte and a lithium ion battery using the electrolyte. The invention is realized by the following technical scheme: the high-voltage electrolyte comprises a non-aqueous solvent, lithium salt and an additive, wherein the non-aqueous solvent is a carboxylic ester compound which accounts for 1-40% by mass of the high-voltage electrolyte; the additive is any one or more of lithium bis(oxalate)borate (Li BOB), fluoroethylene carbonate (FEC) and ethylene glycol bis(propionitrile) ether. The high-voltage electrolyte contains carboxylic ester solvents capable of improving an electrode/electrolyte interface, and through optimized combination of the carboxylic ester solvents, Li BOB, FEC, ethylene glycol bis(propionitrile) ether and other various additives, the good cycle performance of a high-voltage battery can be ensured, meanwhile, the high-temperature storage performance of the high-voltage battery can be effectively improved, and gas generation of the battery under high-voltage high-temperature storage condition can be obviously inhibited.

The present invention is based upon the discovery that nontitanyl oxalates can enhance the catalytic functionality of titanyl oxalate catalysts. This invention provides a novel catalytic composition containing a titanyl oxalate catalyst and a metallic oxalate catalyst enhancer and optionally containing a metallic cocatalyst such as an antimony based catalyst. A synergistic relationship has been discovered between titanyl oxalate catalyst and the catalyst enhancer. A synergistic relationship has also been discovered between the titanyl oxalate catalyst, catalyst enhancer and a metallic cocatalyst such as antimony oxide or antimony triacetate. Also provided is an improved process of producing polyester by the polycondensation of polyester forming reactants in the presence of a catalytically effective amount of a polycondensation catalyst, wherein the improvement comprises utilizing, as the polycondensation catalyst, the novel catalyst composition containing a titanyl oxalate such as lithium titanyl oxalate and a catalyst enhancer such as a nontitanyl metallic oxalate like lithium oxalate and optionally containing a metallic catalyst such as antimony oxide or antimony triacetate. The improved process produces an improved polyester having lower acetaldehyde numbers and good color. The titanyl oxalate/catalyst enhancer composition can be used as a polycondensation catalyst in combination with other catalysts to achieve synergistic catalytic activity. Preferred is a combination of lithium or potassium titanyl oxalate, Li2 or K2TiO(C2O4)2, lithium or potassium oxalate, Li2 or K2(C2O4)2 with antimony oxide or antimony triacetate or antimony trisglycoxide.

The present invention provides a positive electrode for a lithium rechargeable electrochemical cell, the electrode comprising an aluminum current collector and a paste containing both an electrochemically active material and a binder suitable for being put into solution or suspension in water, wherein the surface of said collector is covered in a protective layer constituted by at least one component selected from an oxalate and a compound of at least one element selected from silicon, chromium, and phosphorus.

A process for preparing VO2 nanoparticles includes such steps as proportionally adding V2O5 and oxalic acid to reactor, adding water, stirring at 40-70 deg.C while reaction, evaporating to obtain solid vanadium oxalate, vacuum heating to 350-500 deg.C, holding the temp for 20-40 min for thermodecomposing, and cooling. It is possible to add MoO3 or N5H37W6O24 for preparing the doped product.

A process for sequestrating carbon emitted into the atmosphere in the form of CO₂ comprises:

• • a) a step for concentrating CO₂ in the liquid phase;
  • b) a step for electro-reduction in an aprotic medium to a compound in which the carbon changes to oxidation number +3 in the form of oxalic acid or formic acid;
  • c) if appropriate, a step for re-extracting oxalic or formic acid in the aqueous phase; and
  • d) a step for mineralization by reaction with a compound of an element M, resulting in a stable compound in which the atomic ratio C/M is about 2/1.

The invention discloses a synthesis technique for simultaneously obtaining difluoro oxalate lithium borate and di-oxalate lithium borate with outstanding performances, comprising the following steps:1. reacting fluorinated compound, boracic compound, lithium-containing compound and oxalate-containing compound in a reaction medium at 100 DEG C with reaction pressure of 0.1-1MPa, wherein the mol ratio of lithium, fluorine, boron and oxalate ions is 5-9:5-9:-2-3:3-4, and generating a reaction solution containing difluoro oxalate lithium borate and di-oxalate lithium borate; 2. carrying out initial separation on the difluoro oxalate lithium borate and di-oxalate lithium borate in the reaction solution, then carrying out further extraction separation by using organic solvent capable of extracting difluoro oxalate lithium borate or di-oxalate lithium borate; and 3. respectively carrying out recrystallization and vacuum drying to obtain the difluoro oxalate lithium borate and di-oxalate lithium borate of battery level. The invention is suitable for industrially producing two types of lithium salts with excellent performance used for lithium ion batteries.

The invention relates to an air purification material and a preparation method and application thereof, belonging to the technical field of chemical catalytic decomposition, in particular belonging to the technical field of decomposition of formaldehyde pollutants in environment air. The air purification material comprises a base material and manganese oxide, wherein the manganese oxide is supported on the base material, the base material is honeycomb ceramics or a fiber material with a particle filtering function, and the manganese oxide is birnessite manganese oxide prepared from permanganate and oxalate. The air purification material can effectively decompose formaldehyde pollutants in indoor air and can rapidly and constantly remove the formaldehyde pollutants in indoor air at room temperature. The air purification material can be regenerated through heating, so that the service life of the material is prolonged and the practical application is facilitated.

A spray pyrolysis method for producing pure metal and/or metal oxide particles uses a mixture of a carrier gas and a solution of a metal salt precursor, water and a co-solvent reducing agent. The metal salt precursors preferably comprise metals from the group consisting of Fe, Co, Ni, Cu, Zn, Pd, Ag and Au, whereas the salt anions preferably comprise nitrates, acetates, oxalates and chlorides. The co-solvents are those that act as a reducing agent, are vaporizable, are inert with respect to the carrier gas, and are hydrophilic, such as alcohols, in particular, low-carbon numbered alcohols such as methanol or ethanol.

The invention relates to the modification technology of natural zeolite material and aims to provide a nitrogen oxide adsorbent prepared through ion exchange modification of the natural zeolite. The adsorbent is prepared through the following step: adding the natural zeolite after dealumnization processing and ammonium exchange processing into metal salt aqueous solution to be subjected to metal ion exchange; and washing, drying and then roasting at the high temperature of 300-600 DEG C for 1-5 hours to obtain the nitrogen oxide adsorbent of modified natural zeolite containing corresponding metal elements, wherein the metal salt is any one of hydrochloride, nitrate, sulfate or oxalate of Na, Ca, K, Ba, Ti, Mn, Ni or Cu. The nitrogen oxide adsorbent prepared through modification of the natural zeolite can be used as an environment function material for adsorbing and purifying the industrial tail gas, flue gas and automobile exhaust containing nitrogen oxide. The nitrogen oxide adsorbent is low in production cost and large in adsorption quantity, and has a broad market prospect as the environment function material.