436 results about "Ph buffering" patented technology

A slurry containing abrasive particles and a pH buffering component comprising at least one acid or salt thereof and at least one base is especially useful for polishing surfaces, including those used in microelectronics.

A method of hydrothermal hydrocatalytic treating biomass is provided. Lignocellulosic biomass is treated with a digestive solvent to form a pretreated biomass containing soluble carbohydrates. The pretreated biomass is contacted, with hydrogen at a temperature in the range of 150° C. to less than 300° C. in the presence of a pH buffering agent and a supported hydrogenolysis catalyst containing (a) sulfur, (b) Mo or W, and (c) Co, Ni or mixture thereof, incorporated into a suitable support, to form a plurality of oxygenated hydrocarbons.

The present invention provides an aqueous composition for storage of red blood cells consisting essentially of: adenine; dextrose; at least one non-metabolizable membrane-protectant sugar; and a specifically defined pH buffering system. Also provided are improved methods for preserving red blood cells and methods for increasing the viability, membrane retention, and recoverability while suppressing apoptosis, hemolysis, and post-reinfusion clearance of stored red blood cells which utilize the novel compositions.

The invention relates to mixed ionic liquid formula solution, which consists of an ionic liquid A, an ionic liquid B and a mixed solvent C, wherein the positive ion of the ionic liquid A is the N,N-dialkyl imidazole positive ion or the N,N,N,N-tetra alkyl quaternary amine positive ion, while the negative ion thereof is the monobasic carboxylic negative ion; the positive ion of the ionic liquid B is the protonated alkylamine positive ion, while the negative ion thereof is the monobasic or binary or ternary carboxylic negative ion; and the mixed solvent C is aqueous solution of water, polyethylene glycol, polyglycol ether, propylene carbonate or tetramethylene sulfone. The mixed ionic liquid formula solution of the invention is strong base-weak acid and weak base-weak acid mixed salt solution, has wide pH buffering capacity, and can greenly efficiently absorb the SO2 gas in a reversible cycle mode. The mixed ionic liquid formula solution of the invention is adopted as a SO2 absorbent so that the requirement for the equipment required by SO2 absorption is simple, the operation condition of absorbing and desorbing SO2 is mild, the desulfurization efficiency is high, and the problems of waste solution and wastewater discharge and the like do not exist. The invention also discloses a preparation method for the mixed ionic liquid formula solution.

The present invention is method of comprehensively utilizing waste SO2 gas resource and pyrolusite, and the method includes utilizing the composite absorbent comprising pyrolusite slurry and pH buffering agent to produce oxidation-reduction and neutralizing reaction with waste SO2 gas to eliminate SO2 from the waste gas, purifying the absorbed tail liquid to obtain manganese sulfate product through direct evaporating crystallization or metal manganese product through DC electrolysis, and treating the anode liquid to obtain high purity manganese carbonate product and ammonium sulfate product. The present invention realizes treatment of waste with waste to recover sulfur resource and comprehensively utilize pyrolusite. The method of the present invention is reasonable and has no secondary pollution.

The present invention provides, inter alia, compositions comprising a pH buffering agent and a controlled-release component containing an acid-labile pharmaceutical agent. Methods of using such compositions are also provided.

The invention relates to an ink-jetting ink, in particular to a sublimation ink-jetting ink used for an industrial nozzle and a manufacturing method thereof. The sublimation ink-jetting ink comprises, by weight, 1-6% of disperse dyes, 10-14% of wetting agents, 5-20% of viscosity adjusting agents, 0.1-2% of bactericides, 0.01-1% of pH buffering agent, 1-10% of liquid resin, 0.1-40% of disperse agents, 0.01-5% of antifoaming agents, 0.1-5% of surface active agents, 0.01-2% of metal ion chelating agents and 10-80% of purified water. The manufacturing method of the sublimation ink-jetting ink used for the industrial nozzle includes color paste manufacturing and finished product manufacturing. The sublimation ink-jetting ink used for the industrial nozzle is simple in manufacturing method, smooth in ink jetting, free of blocking the nozzle, good in dispersion stability, free of going bad or denaturing even if being stored for a long time and low in cost, and diameters of dispersed ink points are even.

The invention belongs to the technical field of seed emulsion polymerization, relates to a preparation of a high polymer material, and especially relates to a small-particle-size carboxylic styrene-butadiene latex and its preparation method. Technical problems comprising unadjustable particle size, bad mechanical stability, bad chemical stability and the like of latexes in the prior art are solved in the invention. The preparation method which adopts a seed emulsion polymerization technology and adopts butadiene and styrene as monomers comprises the following steps: adding soft water, a seed latex, an electrolyte, a chelating agent and a pH buffering agent; heating; adding functional monomers, unsaturated carboxylic acid, a molecular weight adjustment agent, a composite emulsifier and an initiator; degassing when the conversion rate reaches above 98%; cooling; and synthesizing the carboxylic styrene-butadiene latex. Compared with the prior art, the preparation method of the small-particle-size carboxylic styrene-butadiene latex has the advantages of realization of the adjustment of the particle size of the latex, and simple operation; and compared with present carboxylic styrene-butadiene latexes, the carboxylic styrene-butadiene latex prepared in the invention has the advantages of narrow monodispersion, good fluidity, excellent mechanical stability and excellent chemical stability.

Compositions and methods are provided for obtaining stabilized quinol compositions, such as catecholamine drugs (e.g., epinephrine solutions), and also for obtaining stable pharmaceutical formulations that comprise a stabilized quinol composition and a second pharmacologically active component such as a local anesthetic or other active drug ingredient having a reversibly protonated amine group. Stability is achieved through the inclusion of an appropriately selected pH buffer and a thiol agent, based on redox and pH buffering principles including pKa of the buffer and of the reversibly protonated amine group.

The invention discloses an exfoliative cells preserving fluid which is prepared from a pH buffering agent, an osmotic pressure maintenance agent, preservatives, a fixing agent for maintaining cellular morphology, an anticoagulant, a mucus softener, an antimicrobial reagent, a cleaning agent, a humectant and red blood cell destroying components. The components in the preserving fluid are reasonable in proportioning, and the exfoliative cells can be preserved at a long time under normal temperature, wherein the longest time can reach 2 years; mucus can be sufficiently dissolved and the red cells can be partially destroyed; a film production effect is good, cellular distribution is very even, cellular morphology is perfect, cytoplasm and cell nucleus demarcation is distinct, gradation is clear, and cytoplasm and cell nucleus transparency is very good, and the exfoliative cells preserving fluid can be simultaneously used for the HPV-DNA (human papillomavirus-deoxyribonucleic acid), Chlamydia and immunohistochemical test; the special liquid base preserving fluid used for the cytologic examination of other parts can be provided, an imported product can be completely replaced, and the cellular constituent with diagnostic significance can be sufficiently preserved; and the exfoliative cells preserving fluid is low in configuration cost and easy to popularize.

A stormwater inlet near an upper edge of a layered filter media vessel is equipped with a distribution header that ensures effective use of the surface area of the filter media by providing plural spaced streams of stormwater thereat, each at a point of impact having its energy dissipated by a layer of material that covers the upper layered filter media surface. The stormwater inflow is metered to control the stormwater pollutant removal process kinetics, thereby slowing the mean free path of the stormwater therethrough and optimizing pollutant capture. The water level within the vessel is height adjustable manually by a pivot arm in the form of a standing column of water coupled to the water within the container. Weep conduits are provided to slowly drain down the standing water in the system between storm events, simplifying maintenance and promoting best removal of pollutants from first-flush storm events. Stormwater pretreatment, e.g. by use of an oleophilic agent or a pH-buffering agent, is provided. Filter media are easily cleaned, as by scraping and / or adding filter media material when existing material's particulate capture capacity is exhausted.

The invention provides an aqueous zinc-nickel alloy electroplating composition particularly useful in an electroplating method for depositing a zinc-nickel alloy layer on a substrate, wherein the deposited layer exhibits uniform nickel concentration and good aesthetics across a broad range of current densities. The electroplating composition comprises an electrolyte composition and an organic composition. In one embodiment, the electrolyte composition comprises a zinc ion source, a nickel ion source, a pH buffering agent and at least one additional salt, and the organic composition comprises a Class I nickel brightener, a Class II nickel brightener, an aromatic carboxylic acid, an aldehyde or ketone compound, and a non-ionic or anionic surfactant. The electroplating composition is particularly free of chelators and free ammonium-producing agents.

The invention provides a chemical copper plating solution for a polyimide film and a surface chemical copper plating method thereof, wherein the chemical copper plating solution is a water solution containing copper salt, ascorbic acid or soluble ascorbic acid salt, a complexing agent, a metal catalyst, a stabilizer and a pH buffering agent. The pH value of the chemical copper plating solution is5.5-8.0, and the concentration of the stabilizer is not higher than 50milligrams / liter. The chemical copper plating solution provided by the invention is a neutral copper plating solution, adopts thenontoxic environment-friendly ascorbic acid or soluble ascorbic acid salt as a reducer, is suitable for the surface chemical copper plating of the polyimide film, and has good effect on environment protection.

The invention provides a metal salt-free sealing agent for an aluminum alloy anodic oxide film, belonging to the technical field of aluminum alloy anodic oxide film post treatment. The sealing agent of the invention is prepared by water solution composed of 1.0-10g / L of a hydration accelerator, 0.01-2g / L of a wetting agent, 0.01-3g / L of an ash inhibitor and 1-15g / L of a pH buffering agent, wherein the pH of workpiece fluid is 5.5-6.5, the operating temperature is 70-90 DEG C, and the sealing speed is 1.0-2.0min / um. The metal salt-free sealing agent creatively adopts organic compounds which are easily subject to biodegradation, does not contain any metal ions of nickel, cobalt, magnesium, calcium, lithium and the like as well as fluorinions, and obtains satisfactory sealing effect of the nano-pores of the aluminum alloy anodic oxide film by virtue of the scientific and coordinated component formula of the water solution; the aluminum alloy anodic oxide film obtained by seal treatment through the sealing agent has the advantages of good corrosion resistance, capability of meeting the requirements of GB 14952.1-94, good light-protection and color-protection properties of a film layer, no ash and pruina, no water stain after drying as well as light flowing color and small color difference change in case of sealing the organic dyeing film; and the metal salt-free sealing agent is widely applicable to sealing treatment of an original-color anodic oxide film, an electrolytic coloring anodic oxide film, a hard oxide film and a dyeing anodic oxide film.

The invention discloses a slow oxygen releasing material for repairing underground water and a preparation method for the slow oxygen releasing material, and belongs to the field of materials for treating sewage. The slow oxygen releasing material for repairing the underground water comprises a kernel material and a shell material, wherein the kernel material consists of an oxygen releasing agent, a plastic adhesive ore, a pH buffering agent and a high-permeability material; and the shell material consists of a plastic adhesive ore, a pH buffering agent and a high-permeability material. The preparation method for the slow oxygen releasing material comprises the following steps of: (1) smashing all the raw materials except for the high-permeability base material; (2) smashing all components in the high-permeability base material except for quartz sand; (3) uniformly mixing the materials, and granulating; (4) adding the shell material into the mixture; and (5) maintaining. The material can effectively increase the dissolved oxygen content in an underground water environment, so that the dissolved oxygen in the underground water can meet a requirement.

The present invention provides a freeze-dried medicine composition containing methylprednisolone sodium succinate and its preparation method. Said medicine composition includes 1-3000 mg of methylprednisolone sodium succinate as main component and auxiliary component including 1-1000 mg of sodium hydrogen carbonate or other alkaline medicinal auxiliary material 1-500 mg of lactose or other stabilizing agent. 1-50 mg of sodium dihydrogen phosphate or acid component of other pH buffering agent, 1-500 mg of disodium hydrogen phosphate or alkaline component of other pH buffering agent and 1-50 ml of injection water.

The invention discloses a cyanide-free gold plating solution. The cyanide-free gold plating solution comprises sulphurous acid gold salt, a main complexing agent, an auxiliary complexing agent, conducting salt, a stabilizing agent and a pH buffering agent. Under the synthetic action of the sulphurous acid gold salt, the stabilizing agent and the other components, stable composite complex ions are formed through the cyanide-free gold plating solution, the plating solution is more stable, the storage period of the plating solution is long, and the sealed storage period at the normal temperature can reach over 6 months.

The invention relates to a preparation method of fluorinated hydroxy vinyl tertcarbonate-acrylate copolymer emulsion with a core-shell structure, comprising the following steps: (1) mixing deionized water with 20 percent to 45 percent of reactive emulsifier relative to the total quantity, stirring and dissolving the mixture, then slowly dripping core layer monomer mixing liquid and preemulsifyingto prepare a core preemulsion for standby; (2) mixing deionized water with 20 percent to 45 percent of the reactive emulsifier relative to the total quantity , stirring and dissolving the mixture, then slowly dripping shell layer monomer mixing liquid and preemulsifying to prepare a shell preemulsion for standby; and (3) adding 5 percent to 30 percent of the core preemulsion relative to the totalquantity into a reactor containing 10 percent to 60 percent of the reactive emulsifier relative to the total quantity, a pH buffering agent and deionized water and dispersing; and then adding 10 percent to 30 percent of an initiating agent relative to the total quantity to prepare seeds; after the emulsion turns blue and no obvious back flow is caused in the reactor, dripping the residual core preemulsion and 35 percent to 45 percent of the initiating agent relative to the total quantity; and then dripping the shell layer monomer preemulsion and 35 percent to 45 percent of the residual initiating agent relative to the total quantity to carry out reaction to obtain the fluorinated hydroxy vinyl tertcarbonate-acrylate copolymer emulsion with the solid content of 40 percent to 50 percent. Theemulsion prepared by the method has the advantages of prominent anti-aging performance and obviously improved resistance to water, alkali and washing.

The invention relates to a preservation solution for exfoliated cells, which is characterized by comprising a pH buffering agent, an osmotic pressure maintaining agent, an anti-corrosion antistaling agent, a fixative for maintaining cellular morphologies, an anticoagulant, a mucus softener, proteinase K and a component for destroying red blood cells. Compared with the prior art, the preservation solution has the advantages that the cell storage rate is high, the storage time at normal temperature is long, the mucus is sufficiently dissolved and the red blood cells are partially destroyed, the sheet-making effect comprises quite even cell distribution, the cellular morphologies are good, the cytolymph and the cell nucleus are divided clearly and are well arranged, the brightness of the cytolymph and the cell nucleus is quite good, and the karyoplasms, the morphological structures and the amount of the cells are quite clear.

The invention relates to a digital ink-jet ink applied to a cellulose fiber fabric, and provides an ink suitable for digital direct injection printing on a cellulose fiber fabric, and a preparation method thereof. The ink is composed of an activated dye, a surfactant, a wet-storage agent, a bacteriacide, a pH buffering agent and deionized water. The invention also provides an application process of applying the ink to digital direct injection printing, realizes a process of fixing color in a baking and drying process after the ink-jet printing, and simplifies process flows of conventional ink-jet printing.

The invention discloses a polishing composition for improving surface quality of sapphire. The polishing composition comprises the following substances: an abrasive, a salt composition, organic components, a pH buffering agent, a pH regulator and water. Compared with the prior art, the polishing composition has the advantages that by addition of the organic components, the smoothness of the polished sapphire surface can be obviously improved, the roughness of the polished sapphire is reduced, and the polished surface is hydrophilic and is easily cleaned.

A method of manufacturing an ink jet recording paper comprising the steps of: (a) applying a first coating composition containing inorganic microparticles and a binder onto a support to form a porous ink absorbing layer; (b) drying the porous ink absorbing layer; (c) applying a second coating composition onto the porous ink absorbing layer during the drying step (b); and (d) drying the porous ink absorbing layers, wherein the second coating composition exhibits a pH buffering function, and both conditions (1) and (2) are satisfied at the same time: Condition (1) pHb−pHc<1.0<pHc−pHa, Condition (2) pHa<pHb, wherein pHa, pHb, and pHc are respectively a pH value of the first coating composition, a pH value of the second coating composition, and a pH value of a surface of the ink jet recording paper.

A machine dishwashing main-wash detergent composition or a dishwashing machine cleaning composition comprising at least one cellulase enzyme, and at least one pectinase enzyme is provided. The compositions optionally also comprise at least one lipase, surfactant (especially non-ionic surfactant) and a pH buffering system.

The invention discloses silica sol / polyacrylic ester emulsion with high silicon content and a preparation method of the silica sol / polyacrylic ester emulsion. The method is characterized in that silica sol is physically modified by adopting water-soluble macromolecules, and the modified silica sol and acrylic ester monomer are subjected to in-situ polymerization to prepare the silica sol / polyacrylic ester emulsion. The formula of the silica sol / polyacrylic ester emulsion comprises the following raw materials in parts by weight: 50 to 70 parts of deionized water, 5 to 30 parts of silica sol, 0.01 to 0.5 part of water-soluble macromolecules, 20 to 53 parts of acrylic ester monomer, 1 to 5 parts of methacrylic acid or acrylic acid, 1 to 5 parts of emulsifier, 0.1 to 0.5 part of initiator and 0.1 to 0.5 part of pH buffering agent; accounting by SiO2, silicon content in the emulsion accounts for 5 to 30 percent of the entire solid content; the particle size of the emulsion particle is 60 to 100 nm; and the carboxyl and hydroxyl on a polymer molecular chain and the hydroxyl on the surface of the SiO2 particles can generate the cross-linking esterification, so that the hardness of the film can reach more than 5H, and the water resistance and weather resistance are prominent.

The invention discloses amine-free waterproof emulsion, and belongs to the technical field of waterproof coatings. The amine-free waterproof emulsion comprises, by weight, 40-50 parts of deionized water, 0.6-12.0 parts of emulsifying agent, 0.02-20 parts of phosphoric acid ester monomers, 0.05-40 parts of hydrophilic monomers, 0.05-60 parts of hydrophobic monomers, 0.05-20 parts of polymerization stabilizer, 0.02-5 parts of vinyl silicone, 0.02-5 parts of initiating agent, 0.02-5 parts of chain transfer agent, 0.02-5 parts of pH buffering agent, 0.02-5 parts of antifoaming agent, 0.02-5 parts of preservative and 0.02-5 parts of alkali liquid. The invention further provides a preparing method of the amine-free waterproof emulsion and a waterproof coating containing the amine-free waterproof emulsion. The waterproof emulsion and the waterproof coating are environmentally friendly and free of pollution, and pungent smells such as ammonia smells are not generated.

The invention discloses nutritional soil for plant cultivation of a karst landform. The nutritional soil is used for solving the problem that the existing soil of karst-landform regions is not conducive to plant growth. The nutritional soil disclosed by the invention comprises foreign soil, an organic fertilizer, acidic soil microflora, organism decomposition microflora, nitrogen fixation microflora, a pH buffering agent, bacterial cellulose, a curing agent and a soil water retention agent. The nutritional soil for the vegetation cultivation of the karst landform, disclosed by the invention, has the advantages that good growth soil can be provided for the vegetation of the karst landform, the problem of stony desertification of the karst-landform regions can be effectively solved, and virtuous cycle for ecosystems of the karst-landform regions is promoted.

The invention provides a desulphurization catalyst which can substantially improve desulphurization efficiency, reduce system obstruction and fouling, prevent foaming and overflow of a slurry pump and reduce energy consumption of system, and a limestone-gypsum wet desulphurization technology used for large-scale thermal power, belonging to the technical field of environment protection. The catalyst comprises components by weight percent: 40-70 % of organic polyprotic acid or sodium salt thereof, 0.1-5 % of transition metal salts, 5-15 % of a pH buffering agent, 0.05-2 % of a surfactant and 5-20 % of a scale inhibitor. The catalyst is characterized in that a synergist can be directly added into a filtrate pit of an absorbing tower, uniformly stirred and dissolved and then pumped into the absorbing tower; or the synergist can be mixed with a limestone powder into a certain concentration and then added. By using the flue gas desulphurization catalyst, buffer capacity of a pH value of the slurry is relatively good, an oxidation rate of sulfite is accelerated by more than 30 %, a desulphurization efficiency is improved by 10 %, residual CaCO3 in the gypsum is reduced to be less than 1 %, a water content is reduced to be more than 2 %, distribution of crystal size is relatively uniform, share of rhombic crystal shapes and columnar shapes are increased, a specific surface area of the crystal is increased and a dehydrated performance of the gypsum is relatively good.

The invention belongs to the technical field of printing dyes in weaving, printing and dyeing industry, and concretely relates to a prepared active dye-based ink formula, preparation, and a color-separation printing method of using the dye-based ink formula to divide a pattern into CMYK four colors. According to the provided active dye-based ink formula, the ink is composed of an active dye, a thickening agent, a surfactant, a humectant, a bactericide, a pH buffering agent and deionized water. Additionally, the invention provides the preparation method of the ink and the application technology. Dye fixation is realized in a heat baking drying process after ink-jet printing, and the problem is overcome that color matching is difficult during large-scale four color separation printing after an ink-jet printed sample is confirmed.