1980 results about "Alkali hydroxide" patented technology

Processes for extracting and recycling alkali metal compounds present in the char produced from the catalytic gasification of carbonaceous materials are provided involving at least contacting the char with and alkali metal hydroxide followed by carbon dioxide. Both the alkali metal hydroxide and carbon dioxide treatments serve to convert at least a portion of the insoluble alkali metal compounds in the char into soluble species which can be recovered and recycled.

The process for preparing tubular titanium oxide particles comprises subjecting a water dispersion sol, which is obtained by dispersing (i) titanium oxide particles and/or (ii) titanium oxide type composite oxide particles comprising titanium oxide and an oxide other than titanium oxide in water, said particles having an average particle diameter of 2 to 100 nm, to hydrothermal treatment in the presence of an alkali metal hydroxide. After the hydrothermal treatment, reduction treatment (including nitriding treatment) may be carried out. The tubular titanium oxide particles obtained in this process are useful as catalysts, catalyst carriers, adsorbents, photocatalysts, decorative materials, optical materials and photoelectric conversion materials. Especially when the particles are used for semiconductor films for photovoltaic cells or photocatalysts, prominently excellent effects are exhibited.

A stripping liquid for a semiconductor device is provided that includes an aqueous solution containing a quaternary ammonium hydroxide, an oxidizing agent, an alkanolamine, and an alkali metal hydroxide. There is also provided a stripping method that includes a stripping liquid preparation step of preparing the stripping liquid and a stripping step of removing at least one deposit selected from the group consisting of a photoresist, an anti-reflection film, and an etching residue by means of the stripping liquid obtained in the stripping liquid preparation step.

Asymmetric supercapacitors comprise: a positive electrode comprising a current collector and a first active material selected from the group consisting of manganese dioxide, silver oxide, iron sulfide, lithium manganese oxide, lithium cobalt oxide, lithium nickel oxide, lithium iron phosphate, and a combination comprising at least one of the foregoing active materials; a negative electrode comprising a carbonaceous active material; an aqueous electrolyte solution selected from the group consisting of aqueous solutions of hydroxides of alkali metals, aqueous solutions of carbonates of alkali metals, aqueous solutions of chlorides of alkali metals, aqueous solutions of sulfates of alkali metals, aqueous solutions of nitrates of alkali metals, and a combination comprising at least one of the foregoing aqueous solutions; and a separator plate. Alternatively, the electrolyte can be a non-aqueous ionic conducting electrolyte or a solid electrolyte.

A method of forming a minute resist pattern wherein a positive-working photoresist composition containing 3 to 15 parts by weight of a quinone diazide group-containing photosensitizer relative to 100 parts by weight of alkali-soluble novolak resin is developed by an aqueous organic or inorganic alkali solution having a lower alkali concentration than that of the conventional one as the developer. The preferable example of the organic alkali materials in the developer is quaternary ammonium hydroxide, and the preferable example of the inorganic alkali materials in the developer is alkali metal hydroxide. The concentrations of the quaternary ammonium hydroxide and the alkali metal hydroxide in the developing solution are 2.2% by weight or less and 0.4% by weight or less respectively. Using such developing solution, high sensitivity, a high film retention rate, high resolution, low process dependency of dimension accuracy, and a formation of excellent pattern profile can be achieved.

Addition of base improves the homogeneity of aqueous copper amine complex preservatives injected into wood. The base includes at least a portion of alkali metal hydroxides, alkali metal carbonates, alkali metal phosphates, alkali metal borates, and/or alkali metal pyrophosphates, the corrosivity of the composition to steel and galvanized steel is reduced, and the leach rate of the copper from the wood is also reduced.

A method for producing furan-2,5-dicarboxylic acid (FDCA) is provided which can efficiently and quantitatively producing FDCA under mild conditions, without employing an expensive catalyst and with a reduced energy consumption. A furan ring compound having two functional groups selected from a hydroxymethyl group, a formyl group and a carboxyl group in the 2- and 5-positions of the furan ring, is oxidized with a metal permanganate in an alkaline environment to produce furan-2,5-dicarboxylic acid. Advantageously, the alkaline environment contains at least one of alkali metal hydroxides and alkali earth metal hydroxides, and the oxidation is performed at a temperature of from 1 to 50° C. by adding the permanganate metal salt to the alkaline aqueous solution containing the furan ring compound.

A process for making a pervious concrete comprising a geopolymerized pozzolanic ash. Generally, the process includes mixing a solid aggregate and a geopolymerized pozzolanic ash binder together to form a pervious concrete mixture. Some examples of suitable aggregates comprise recycled carpet, recycled cement, and aggregates of coal-combustion byproducts. The geopolymerized pozzolanic ash binder is made by combining a pozzolanic ash, such as fly ash, with a sufficient amount of an alkaline activator and water to initiate a geopolymerization reaction. The activator solution may contain an alkali metal hydroxide, carbonate, silicate, aluminate, or mixtures thereof. In some aspects, the final concrete forms a solid mass in the form of pavement or a pre-cast concrete shape. The solid mass of concrete may have a void content of between about 5% and about 35%.

A metal-air battery includes a housing having an aperture for the passage of air and a pair of electrodes that extend from the housing. An air cathode may be interconnected with one of the electrodes and an anode may include a metal foil that is interconnected with another of the electrodes. A separator may be interposed between the air cathode and the metal foil and a barrier layer may surround the metal foil. The barrier layer may function to substantially reduce the passage of moisture to the metal foil. A method of making a metal-air battery is also presented.

A process for recovering lead oxides from the spent paste of exhausted lead acid batteries. The process provides heating the spent paste with an alkali hydroxide solution at elevated temperatures prior to calcinations. Calcination is at various temperatures so that either lead mono-oxide, lead dioxide or red lead is obtained as the principal product. There is also provided the use of the lead oxide to prepare the paste for positive and negative electrodes or other lead compounds.

An object of the present invention is to provide a solid polymer electrolyte membrane in which a polyazole-based compound is uniformly mixed with a perfluorocarbonsulfonic acid resin. Thus, the present invention provides a solid polymer electrolyte membrane for solid polymer electrolyte fuel cell, which has high durability, as well as a membrane electrode assembly and a solid polymer electrolyte fuel cell, each containing the same. The inventive solid polymer electrolyte membrane is produced by a method which comprises a polymer electrolyte-containing solution preparation step of dissolving a perfluorocarbonsulfonic acid resin (component A) having an ion-exchange capacity of 0.5 to 3.0 meq/g, a polyazole-based compound (component B) and an alkali metal hydroxide in a protic solvent to prepare a polymer electrolyte-containing solution in which a weight ratio of the component A to component B, (A/B), is from 2.3 to 199 and a total weight of the component A and the component B is from 0.5 to 30% by weight; and a membrane formation step of forming a membrane from the polymer electrolyte-containing solution.

Provide is a zinc secondary battery capable of preventing a short circuit between the positive and negative electrodes caused by zinc dendrites. The zinc secondary battery of the present invention comprises a positive electrode; a negative electrode containing zinc; an electrolytic solution in which the positive electrode and the negative electrode are immersed or with which the positive electrode and the negative electrode are in contact, wherein the electrolytic solution is an aqueous solution containing an alkali metal hydroxide; and a separator being placed between the positive electrode and the negative electrode and separating the positive electrode and the negative electrode from each other, wherein the separator comprises an inorganic solid electrolyte body having hydroxide ion conductivity.

An aluminum-alkali hydroxide recyclable hydrogen generator is provided that enables generation of hydrogen for a consuming apparatus on demand. The hydrogen generator includes a source of aluminum, a source of a hydroxide, a source of water, and a reaction chamber, where the amount of at least one of the aluminum, sodium hydroxide, and water that is introduced into the reaction chamber is used to limit the chemical reaction to control the amount of hydrogen generated.

The invention relates to a catalyst for decomposing hydrogen sulfide by photocatalysis and a preparation method of hydrogen and liquid sulfur by employing same. The catalyst comprises a carrier, active component and assistant and has the characteristics that the carrier is one or more selected from vanadate, niobate and tantalate, the active component is one or more selected from alkali metal hydroxide, alkaline earth metal hydroxide, alkali metal nonmetal oxysalt, alkali metal nonoxysalt, alkaline earth metal nonmetal oxysalt and alkaline earth metal nonoxysalt and the assistant is lanthanide oxide or VIII group oxide. The catalyst of the invention can be used for preparing hydrogen and liquid sulfur so that the produced sulfur is easy to be separated from the catalyst, the catalyst can be recycled and the sulfur contained in hydrogen sulfide can be fully recycled, thus realizing the comprehensive utilization of hydrogen sulfide.

Processes comprising: (a) reacting phosgene and a monohydroxyl aryl compound in the presence of a suitable catalyst to form a diaryl carbonate and a solution comprising an alkali chloride; (b) separating the diaryl carbonate from the solution; (c) adjusting the pH of the solution to a value of less than or equal to 8 to form a pH-adjusted solution; (d) treating the pH-adjusted solution with an adsorbent to form a treated solution; (e) subjecting at least a portion of the treated solution to electrochemical oxidation to form chlorine and an alkali hydroxide solution; and (f) recycling at least a portion of one or both of the chlorine and the alkali hydroxide solution.

The invention relates to a preparation method of a cold-formed soap. The method has simple process steps, and substitutes traditional aqueous solution of sodium hydroxide with sodium hydroxide or a dispersion of sodium hydroxide and glycerol; sodium hydroxide is completely soluble in glycerol but disperses in glycerol, so as to avoid fast reaction after mixing of sodium hydroxide solution with oil too, reduce the initial reaction rate of saponification, and effectively control saponification reaction rate; along with the saponification reaction, the reaction product of glycerol continuously increases to help more fully dispersion of sodium hydroxide, accelerate the reaction rate of sodium hydroxide and the remaining oil. Since the method employs an anhydrous formula, water evaporation process is not needed after soap formation by liquid soap, and the production cycle is significantly shortened; and the nutrition substances are added in solid form powder to effectively prevent the contact reaction of non-alkali-resistant nutrients and alkali hydroxide molecules, so as to retain the active nutrient ingredients in the soap and give full play to the role of skin care of the nutrients.

A modified alkali silicate composition for forming an inorganic network matrix. The modified alkali silicate matrix is made by reacting an alkali silicate (or its precursors such as an alkali hydroxide, a SiO₂ source and water), an acidic inorganic composition, such as a reactive glass, water and optional fillers, additives and processing aids. An inorganic matrix composite can be prepared by applying a slurry of the modified aqueous alkali silicate composition to a reinforcing medium and applying the temperature and pressure necessary to consolidate the desired form. The composite can be shaped by compression molding as well as other known fabrication methods. A notable aspect of the invention is that, although composite and neat resin components prepared from the invention can exhibit excellent dimensional stability to 1000° C. and higher, they can be prepared at the lower temperatures and pressures typical to organic polymer processing.

An ink jet ink composition including from 40.0 to 99.0% by weight of water; from 0.1 to 20.0% by weight of a pigment dispersed with an oleoyl methyl taurine salt dispersant from 0 to 70.0% by weight of a water miscible co-solvent; and from 0.1 to 20.0% by weight of a water-reducible addition polymer; wherein the weight average molecular weight of the polymer is from 2,000 to 100,000; the acid number is from 50 to 400; and the acid group on the polymer is neutralized by an alkaline metal hydroxide such as lithium hydroxide, sodium hydroxide potassium hydroxide, or a mixture thereof; and wherein all weight percentages are based on the total weight of the ink composition. An ink jet printing method is also disclosed.

An electrochemical cell and its method of operation includes an electrolyte having a binary salt system of an alkali hydroxide and a second alkali salt. The anode, cathode, and electrolyte may be in the molten phase. The cell is operational for both storing electrical energy and as a source of electrical energy as part of an uninterruptible power system. The cell is particularly suited to store electrical energy produced by a renewable energy source.

A toughening agent composition for increasing the hydrophobicity of an organosilicate glass dielectric film when applied to said film. It includes a component capable of alkylating or arylating silanol moieties of the organosilicate glass dielectric film via silylation, and an activating agent selected from the group consisting of an amine, an onium compound and an alkali metal hydroxide.