192 results about "Acid–base reaction" patented technology

A dermatological composition comprising a salt of a cation and an anion. The cation is derived from a monomeric or polymeric molecule that will generate an amidine moieity, a guanidine moieity or a biguanide moieity. The anion is derived from a monomeric or polymeric molecule that will generate a carboxylic acid moieity. The composition may be prepared by a metathesis or acid-base reaction.

Known phosphate ceramic formulations are improved and the ability to produce iron-based phosphate ceramic systems is enabled by the addition of an oxidizing or reducing step during the acid-base reactions that form the phosphate ceramic products. The additives allow control of the rate of the acid-base reactions and concomitant heat generation. In an alternate embodiment, waste containing metal anions are stabilized in phosphate ceramic products by the addition of a reducing agent to the phosphate ceramic mixture. The reduced metal ions are more stable and/or reactive with the phosphate ions, resulting in the formation of insoluble metal species within the phosphate ceramic matrix, such that the resulting chemically bonded phosphate ceramic product has greater leach resistance.

A method for semi-quantitatively or quantitatively detecting the presence of a microbe in a sample is provided. The method utilizes a test dye that undergoes a detectable color change in the presence of one or more microbes. For example, in one embodiment, the test dye is a solvatochromic dye (e.g., Reichardt's dye) that responds to differences in polarity between microbe components (e.g., cell membrane, cytoplasm, etc.) and the environment outside the cell. Alternatively, other mechanisms may be wholly or partially responsible for the interaction between the dye and the microbe, such as acid-base reactions, redox reactions, and so forth. Regardless, the color of the test dye may be compared to the color of a control dye, wherein the color of the control dye corresponds to a known microbe concentration.

An elastomeric article that contains a chromogen that undergoes a detectable change in color in the presence of one or more microbes is provided. For example, in one embodiment, the chromogen is a solvatochromic dye (e.g., Reichardt's dye) that undergoes a color change in the presence of bacteria or other microbes. More specifically, such dyes may respond to differences in polarity between microbe components (e.g., cell membrane, cytoplasm, etc.) and the environment outside the cell. Alternatively, other mechanisms may be wholly or partially responsible for the interaction between the dye and the microbe, such as acid-base reactions, redox reactions, and so forth.

The invention relates to high purity fasudil hydrochloride compound; the method can obtain high purity fasudil hydrochloride finished goods and belongs to the technical field of medicine. The purity of the fasudil hydrochloride is greatly increased by acid-base reaction, silicagel column elution and activated carbon adsorption. The method has simple technique, low cost and high yield and is suitable for industrialization production.

The invention relates to a high-efficiency and novel biological carrier for a sewage biological treatment and a preparation method thereof. The biological carrier is prepared by comprising the following steps of: blending, extruding or injection-molding the following components: PP, PE, and ethylene-propylene copolymer, compatilizer, inorganic materials, plant materials, magnetic particles, and waste rubber according to a certain proportion, thus providing a biological carrier with large specific surface area, high hydrophilicity and easy hanged membrane on surfaces. The shapes of the biological carriers can be spherical, fibrous and polyhedral or powdery with various forms. The chemical or physical methods such as grinding, acid base reaction, coating on surface and the like can also be carried out to prepare the biological carrier, thus further improving the specific surface area, strengthening the adhesive ability of the biological membrane on the carrier, and improving the microorganism concentration. The preparation method of the biological carrier provided by the invention is simple, has wide adjusting range of the carrier density, easy obtaining materials, low cost, high efficiency of eliminating COD and variety shapes, can be lighter or heavier than water, and is applicable to all biological wastewater treatments.

The present invention provides compositions, formulations and methods providing for the effective dissolution of inorganic fluorides in solvents via incorporation of a dissociating agent component. Dissociating agents of the present invention participate in chemical reactions in solution, such as complex formation, acid-base reactions, and adduct formation reactions, that result in enhancement in the dissolution of inorganic fluorides in a range of solvent environments. Dissociating agents comprising Lewis acids, Lewis bases, anion receptors, cation receptors or combinations thereof are provided that significantly increase the extent of dissolution of a range of inorganic fluorides, particularly inorganic fluorides, such as LiF, that are highly insoluble in many solvents in the absence of the dissociating agents of the present invention.

The invention provides a method for preparing silica aerogel under atmospheric pressure and the prepared silica aerogel. The method comprises the following steps: (1) diluting an inorganic silicon source with water, and then mixing the diluted inorganic silicon source with an acid to carry out an acid-base reaction to obtain silicic acid sol; (2) gelling the silicic acid sol, and conducting aging treatment on the formed gel to obtain a wet gel; (3) adding modifier base fluid to the wet gel to completely infiltrate the wet gel; then adding a concentrated acid or concentrated alkali solution to the system; and conducting surface modification treatment under an airtight condition or in an installation with a condensing reflux device until the gel is completely modified from hydrophilicity to hydrophobicity; and (4) conducting drying treatment on the modified aerogel obtained in the step (3) to obtain the silica aerogel. The method also comprises a step of adding a polar organic solvent or a polar organic solvent aqueous solution to the silicic acid sol obtained in the step (1), and/or to the system before addition of the concentrated acid or concentrated alkali solution in the step (3).

Embodiments of the invention provide infusion systems for the intravenous or other delivery of drugs and other therapeutic agents to a patient including a human or mammal. The therapeutic agents may be dissolved in solution or comprise the solution itself. Embodiments of the systems can utilize a chemical reaction to predictably drive a flow of drug(s) through a catheter or other flow path and into the patient. More specifically, the reaction may include an acid-base reaction or any other reaction that produces a gaseous substance. The gas is produced and contained in an expandable drive balloon when the acid-base reactants are combined with a liquid. As the gas is produced, the drive balloon expands to exert pressure on a separately-contained drug reservoir which, in turn, pushes drug(s) from the reservoir into the flow path where the drug is ultimately delivered to the patient in a controlled and predetermined manner.

The invention relates to a preparation method for a novel nanocarbon fluid. The method comprises the following steps: adding the original nanocarbon material into strongly acidic oxidation liquid (the volume ratio of concentrated sulfuric acid to concentrated nitric acid is 3:1) to obtain an active carbon oxide material with the surface containing -COOH; adding amino-containing polyether amine serving as a modifier into the suspension liquid of the active carbon oxide material under the conditions of ultrasonic and magnetic stirring, performing acid-base reaction on the amino and carboxyl on the interface of the polyether amine and the carbon oxide material and grafting the polyether amine and the carbon oxide; and adjusting the type and the using amount of the polyether amine to obtain the nanocarbon fluid. The method is simple, effectively controls and increases the grafting ratio of the polyether amine on the surface of the nanocarbon material and is applicable to synthesis of various carbon material fluids. The nanocarbon fluid material prepared by the method has hydrophilicity, lipophilicity and good application prospect in aspects of coating, plastic, rubber, functional materials and the like.

The invention relates to a micro-calorimetric method suitable for quickly detecting total amount of microorganisms in food, which changes microorganism growth heat release into acid-base reaction heat release, and comprises the following steps: 1) detecting CO2 released by thalli growth instead of detecting thalli growth heat, and using the CO2 to perform acid-base chemical reaction with alkali liquor to release heat; and 2) neutralizing the residual alkali liquor in a Micro DSCIII sample cell and a reference cell with acid, wherein the alkali liquor in the reference cell is not neutralized by the CO2 so that the released heat is bound to be more than the heat of the sample cell, and the difference of the two heat values is the amount of the consumed alkali, thus the amount of the CO2 consumed by the consumed alkali can be calculated, and the amount of the microorganisms contained in a sample can be calculated according to a standard curve for measuring the total amount of bacteria. The micro-calorimetric method used for detecting the total amount of the microorganisms greatly improves the detection sensibility, shortens the detection time, and is applicable to detecting the total number of the microorganism through a calorimetric method.

The present invention provides compositions, formulations and methods providing for the effective dissolution of inorganic fluorides in solvents via incorporation of a dissociating agent component. Dissociating agents of the present invention participate in chemical reactions in solution, such as complex formation, acid-base reactions, and adduct formation reactions, that result in enhancement in the dissolution of inorganic fluorides in a range of solvent environments. Dissociating agents comprising Lewis acids, Lewis bases, anion receptors, cation receptors or combinations thereof are provided that significantly increase the extent of dissolution of a range of inorganic fluorides, particularly inorganic fluorides, such as LiF, that are highly insoluble in many solvents in the absence of the dissociating agents of the present invention.

The invention discloses a lactobacillus effervescent tablet, which is prepared from 1 to 15 portions of lactobacillus powder, 20 to 50 portions of auxiliary materials, 10 to 30 portions of acid sources, 11 to 30 portions of sodium bicarbonate, 2 to 35 portions of disintegrating agent and 0.2 to 2.5 portions of lubricant. The effervescent tablet transmits lactobacillus to various parts of the uterus after effervescence through an acid-base reaction, increases the effective contact range of the lactobacillus and the uterus, makes a larger area of the lactobacillus adsorbed and set by a mucous membrane of the uterus, avoids the use of ointment, a suppository and a liquid preparation, overcomes the defect that the medicine can be only sent to the bottom and the side wall of the uterus, and not only achieves the aims of treatment and prevention but also reduces in vivo antibiotic residue.

The invention relates to a cefmenoxime hydrochloride compound, which is prepared through acid-base reaction, activated carbon adsorption, separation and purification of prepared chromatography so as to achieve the aim of purification and obtain the high-purity cefmenoxime hydrochloride compound finally. The invention optimizes the product quality, and guarantees safety of clinical medication.

The invention provides a preparation method of an onium hydroxide represented by formula I. The method comprises the following steps: sending an aqueous solution of onium salt represented by formula II into a bipolar membrane electrodialysis apparatus, and carrying out bipolar membrane electrodialysis to obtain an aqueous solution of the onium hydroxide represented by formula I, wherein a neutralizing liquid is sent into the acid chamber of the bipolar membrane electrodialysis apparatus, and contains a substance, and the substance and HX undergo an acid-base reaction. The preparation method of the onium hydroxide has the advantages of long continuous running time of the bipolar membrane electrodialysis apparatus, production cost reduction and production efficiency increase. The onium hydroxide prepared through the method has purity and good quality.

The invention relates to a medlar product and a production process of a medlar nutritious effervescent tablet thereof. A medlar extract is taken as a main component of the medlar nutritious effervescent tablet. The effervescing agent is made by mixing and tabletting alkaline particles and acid particles. The alkaline particles are made from the medlar extract, sodium carbonate, lactose, glucose and a sweetener. The acid particles are of the medlar extract, vitamin C, citric acid and glucose. The medlar nutritious effervescent tablet of the invention is immediately disintegrated into water solution by an acid-base reaction, therefore, people can easily take the tablet with good taste, and the people can enjoy drinking as well as can absorb more nutritious components.

The invention discloses a method for preparing lithium hydroxide, which comprises the following steps: S1, dissolving raw lithium carbonate with sulfuric acid to obtain lithium sulfate solution; S2, using lithium hydroxide to regulate that pH of the solution to be 6.6-8.5; adding lithium carbonate to precipitate and filtering to obtain a first filtrate; S3, filtering by adopting a membrane filterdevice to obtain a second filtrate; S4, adopting resin adsorption to obtain resin adsorbed liquid; S5, adding water to dilute, and passing through a bipolar membrane to obtain dilute brine, acid waterand alkali water; the alkali water being a lithium hydroxide solution; S6, after evaporating and concentrating alkali water and crystallizing, obtaining the crystal being lithium hydroxide monohydrate, and the purity being more than 99wt%. A material liquid with extremely low impurity content is obtained by acid-base reaction precipitation impurity and multi-stage filtration treatment, membrane filtration and resin adsorption treatment using crude lithium carbonate as raw material, alkali water is obtained by bipolar membrane separation, and high-quality and high-purity lithium hydroxide is obtained by evaporation and concentration crystallization.

A method for producing single crystalline zinc oxide nanoparticles that is capable of mass production includes mixing, between processing surfaces which are disposed in a position facing each other so as to be able to approach and separate from each other and rotate relative to each other, a zinc oxide separating solvent prepared by homogeneously mixing an acidic substance with a solvent containing at least alcohol and a raw material solution obtained by mixing a zinc oxide nanoparticle raw material with a basic solvent or a raw material solution that is basic as a result of mixing and dissolving a zinc oxide nanoparticle raw material with and into a solvent, and discharging a mixed fluid in which zinc oxide nanoparticles have separated out from between the processing surfaces. The zinc oxide separating solvent and the raw material solution are mixed between the processing surfaces so that the mixed fluid becomes basic, and zinc oxide nanoparticles are generated by an acid-base reaction due to mixing of the acidic substance and the basic solvent.

The invention relates to a kudzuvine root extract, in particular to a kudzuvine root nutrient effervescent tablet made by taking the kudzuvine root extract as a main raw material and a production technique thereof. The kudzuvine root nutrient effervescent tablet takes the kudzuvine root extract as a main component. The effervescent is made by mixing alkaline granule with acid granule for tablet making, wherein, the alkaline granule is made from the kudzuvine root extract, sodium carbonate, milk sugar, glucose and an edulcorator, and the acid granule is made from the kudzuvine root extract, vitamin C, malic acid, citric acid and glucose. The kudzuvine root nutrient effervescent tablet can quickly disintegrate into aqueous solution by taking use of acid-base reaction and therefore, when taking the tablet, the difficulty for swallowing the tablet by people is solved and the taste thereof is improved and the absorption of nutrient components is enhanced when people enjoy beverage.

The invention relates to a high-purity creatine phosphate sodium compound; by the acid-base reaction, the activated carbon adsorption and the preparation of chromatographic separation and purification, the purity and content of the creatine phosphate sodium is greatly increased, the product quality of the preparation is optimized and the safety of the clinical medication is guaranteed; and the method has simple technique, low cost and high yield and is suitable for industrialization production.

The invention relates to a tropisetron hydrochloride compound. The purity of the tropisetron hydrochloride is greatly improved by acid-base reaction, activated carbon adsorption and separation and purification prepared chromatographic columns, thus optimizing the quality of preparation products and the safety of clinical medication. The method has simple process, low cost and high yield, and is applicable to industrial production.

A method for forming a nanoparticle oxide electrode of a dye-sensitized solar cell is provided. In the method, a basic aqueous solution or an acidic aqueous solution is respectively added to a nanoparticle oxide colloidal solution having a good acidic or basic dispersion, to form a basic nanoparticle oxide paste by an acid-base reaction. Next, after the nanoparticle oxide paste is coated on a substrate, the coated nanoparticle oxide paste is dried at a low temperature of 150° C. or lower. Accordingly, the low-temperature coating nanoparticle oxide paste with high viscosity can be manufactured on the basis of the acid-base reaction, even without the addition of polymer, and accordingly, the nanoparticle oxide electrode can be formed even at a low temperature.