30 results about "Dissolution" patented technology

The invention relates to a method for preparing an organic starch ester. The method comprises mixing a starch material with an ionic liquid solvent to dissolve the starch, and then treating the dissolved starch with an organic esterifying agent to form an organic starch ester, and subsequently separating the organic starch ester from the solution. Microwave irradiation and/or pressure can be applied to assist in dissolution and esterification.

The invention discloses a preparation method and application of a water-soluble carbon fiber sizing agent. The water-soluble carbon fiber sizing agent contains 3-30 parts of water-soluble polymer, 0.04-1 part of adhesive, 0.1-2 parts of emulsifier and 60-97 parts of solvent, wherein the water-soluble polymer refers to a molecule containing a great quantity of one or several of hydroxyl, amino, acylamino and carboxylic acid. The preparation method comprises the following steps: at 60-100 DEG C, adding the water-soluble polymer into the solvent to be completely dissolved, and after the temperature is moderate, adding the adhesive and the emulsifier into the solution, and stirring for dissolution to prepare an integrated solution, thus obtaining the water-soluble carbon fiber sizing agent. Materials adopted by the invention are all non-toxic; after the carbon fiber is treated by using the water-soluble carbon fiber sizing agent, the surface of the carbon fiber contains a large quantity of active functional group, so that the surface hydrophilicity and dispersibility of the carbon fiber are greatly improved, good softness and flexibility of the carbon fiber are guaranteed, and the carbon fiber can be better applied to water treatment and other aspects having requirement for good dispersibility of the carbon fiber.

The invention relates to a method for analyzing components in calcined lime in desulfurization of smoke. First some calcined lime powder is fetched, which is dried under 100-110 centigrade to thoroughly remove the water contained, then is burnt under 650-700 centigrade to ensure that Ca(OH)2 is completely dissolved into CaO and H2O, and CaCO3 is not dissolved, in this way the mass difference before and after the burning will be the water content generated by the dissolution of Ca(OH)2, and by the water mass, the content of Ca(OH)2 can be calculated; then the method and device disclosed in patent 200610054402.5 is used to detect the content of CaCO3. The invention is easy to operate, needs few equipment and reagent, analyzes accurately, can determine the actual contents of different components especially CaCO3 in calcined lime, because CaCO3 is an inertial substance in the calcined lime and will block the reaction with SO2 and influence the desulfurization efficiency. The invention can also be used for analyzing components in slaked lime.

The invention relates to a method for extracting unsaturated fatty acids from eucalyptus leaves. An organic solvent is used for extraction. Unsaturated fatty acid crude extracts are obtained by low-temperature crystallization treatment after dissolution, and more than 7 percent of unsaturated fatty acid component is obtained by CO2 critical extraction. The extraction method is simple, convenient, low in cost, stable in process and high in extraction efficiency. The unsaturated fatty acids in the eucalyptus leaves cotain polyunsaturated fatty acids such as linoleic acids and linolenic acids, are natural extracts, have the effects of resisting bacteria, resisting oxidation, depressing blood fat, lowering cholesterol, improving memory, suppressing tumors and the like, and can be widely applied to the fields of feeds, cosmetics, foods, biochemical engineering, even medicine and the like.

A characterization method for the solubility of ionic liquid is applied under atmospheric pressure for testing the function among ionic liquid and gas/gas molecules of volatile organic solvent, which is characterized by comprising: using an object ionic liquid as the sensitive film coat material of a resonator induction zone of a mass sensitive piezoelectric crystal detector; coating an ionic liquid film on the surface of the resonator induction zone; detecting the frequency change of the detector before and after acting with researched gas molecules to represent the function between the researched ionic liquid and the gas. The ionic liquid characterization method can obtain the solubility of ionic liquid in gas/volatile organics, and thermodynamic parameters as enthalpy, entropy, free energy change and the like in dissolution; and can research the function approach between ionic liquid and gas molecules. The measurement method is simple, fast and reliable, which can accelerate the development and application of ionic liquid.

The invention discloses a preparation method for silicone-acrylic miniemulsion. The preparation method comprises the following steps: mixing acrylate monomers, organosilicone monomers and a stabilizer, stirring until complete dissolution, and obtaining an oil-phase mixture, wherein the organosilicone monomers include non-functional organosilicone monomers and functional organosilicone monomers, and the non-functional organosilicone monomers include methyltrimeth(eth)oxysilane, propyltrimeth(eth)oxysilane or phenyltrimeth(eth)oxysilane; dissolving an emulsifier and water, and stirring uniformly to obtain a water-phase mixture; adding the oil-phase mixture into the water-phase mixture, producing a hydrolysis-emulsification reaction, performing ultrasonic miniemulsification, and producing a miniemulsion polymerization reaction of a mixed solution in an oxygen-free condition at 50-70 DEG C to obtain the silicone-acrylic emulsion. The preparation method is used for performing miniemulsion polymerization on a monomer system consisting of the non-functional organosilicone monomers, the functional organosilicone monomers and the acrylate monomers, the prepared silicone-acrylic miniemulsion is relatively high in both silicon content and solid content, and the coagulation rate can be reduced to 0%.

The invention provides a preparation method of ZnCdSe/ZnS quantum dots. The method comprises the following steps that 1, a zinc source, a cadmium source, organic acid and/or organic amine and an organic solvent are stirred and heated to be dissolved after shielding gas is introduced to obtain a zinc and cadmium mixed pro-solution; 2, the solution is heated to 200-350 DEG C, and then a selenium source is injected into the solution within 30 s; 3, a sulfur source or sulfur and zinc source mixed solution is added drop by drop; 4, the temperature of 200-350 DEG C is kept constant, then cooling is performed to reach the room temperature, and separation and purification are performed to obtain ZnCdSe/ZnS quantum dots. The preparation method of the ZnCdSe/ZnS quantum dots is safety to implement, simple, controllable, low in cost, and capable of achieving repetition and amplification; the obtained quantum dots are uniform and controllable in size and appearance, the monodipserity is good, the fluorescence quantum yield is high, and the good stability on the high-temperature, washing and water dissolution modification and other conditions is good.

The invention relates to an azithromycin dispersible tablet and a preparation method thereof. The azithromycin dispersible tablet is prepared by the following steps: by adopting a fluid bed bottom spraying technology, coating azithromycin by using a suspension of calcium carbonate and a water-insoluble macromolecular polymer to prepare an azithromycin microcapsule; and then uniformly mixing the azithromycin microcapsule with other pharmaceutically acceptable auxiliary materials of the azithromycin and tabletting, wherein the water-insoluble macromolecular polymer is selected from one or more of acrylic resin, ethyecellulose and hydroxypropyl methylcellulose phthalate. Compared with the prior art, the azithromycin dispersible tablet disclosed by the invention has the advantages of good taste, fast dissolution and simple preparation process.

The invention discloses a graphene coated carbon-sulfur composite positive electrode, a preparation method thereof and a secondary aluminum battery. The graphene coated carbon-sulfur composite positive electrode is prepared by compounding a carbon nanotube sponge with elemental sulfur and then dipping the composite material in graphene slurry. The carbon nanotube sponge has a three-dimensional network structure and is capable of adsorbing active substances and lowering dissolution of sulfide by virtue of large specific surface area. A conductive network, formed among particles after the surface of the composite material is coated with graphene, is capable of lowering contact resistance generated by carbon nanotube sponge-sulfur surface insulativity, inhibiting the dissolution of a surface active substance, namely sulfur, of the carbon nanotube sponge, and improving the cycling performance of the composite positive electrode. The positive electrode prepared by the method is free of a conducting agent or a binding agent and is environmentally friendly and cheap. The secondary aluminum battery prepared by applying the composite positive electrode is excellent in cycling performance and has environment-friendly and safe effects.

The invention discloses a nondestructive detection system for the state of a crude oil tank bottom plate corrosion product. The system comprises an electrochemical impedance spectrum acquisition subsystem (1), an acoustic emission burst information acquisition subsystem (2) and a crude oil tank sedimentation water bottom plate corrosion product state judgment subsystem (3). The generation, dissolution and fracture situations of a corrosion product film on a bottom plate in a crude oil tank under the corrosion environment of sedimentation water are obtained by analyzing electrochemical impedance spectra and acoustic emission energy spectra under the acquisition time, so that the stress corrosion situation and the damage situation of the bottom plate in the crude oil tank can be judged, and the loss of equipment and economy due to stress corrosion is reduced.

The invention discloses a nanometer antibacterial deodorizing fiber, which is prepared by the following steps: adding a nanometer antibacterial master batch, a plant extract and a dispersant to a viscose fiber spinning fluid in certain proportion, then extruding and filtering the mixture after full dissolution, and spraying the fiber via a spinneret plate. Every 100g of viscose fiber spinning fluid comprises 5.2g-5.5g of nanometer antibacterial master batch, 1g-1.2g of plant extract, and 0.3g-0.5g of dispersant. According to the method, the function of inhibiting various bacteria and molds of the fiber can be improved, the washability of the fiber is enhanced, the antibacterial time can be prolonged, and the fiber has the function of protecting human skin.

The invention relates to the field of dyeing and finishing and discloses a method for dyeing a carboxymethyl chitosan silicon-modified cotton fabric with natural dyes. The method adopts a chitin alkaline hydrolysis approach for oxidoreduction to obtain chitosan after drying; glycidyl trimethoxy siloxane is added into a carboxymethyl chitosan solution to prepare a carboxymethyl chitosan silicon-hybrid system solution; a cotton fabric is soaked in the solution in a constant-temperature vibration dyeing machine, washed with water and then dried for later use; absolute ethyl alcohol is adopted forextracting a radix lithospermi dye mother liquor, and the pretreated cotton fabric is put into the radix lithospermi dye mother liquor for dyeing through an ethyl alcohol dissolution assistance approach; the temperature is lowered after dyeing is finished, and washing and drying are performed. When the method is used for dyeing the cotton fabric with the natural dyes, the advantages of simple operation, high dyeing rate, energy conservation and environmental protection are achieved.

The invention provides two new crystal forms: a crystal form E and a crystal form F, of canagliflozin, and the preparation method thereof. The new crystal forms are greatly improved in form and particle size. The particles are fine in size and are dispersed uniformly, so that it is beneficial to improvement of medicine solubility and dissolution rate, thereby being beneficial to preparation development.

The invention discloses a preparation method of a phosphatization liquid for steel pipe cold-rolling processing pre-treatment. The phosphatization liquid comprises 22-26g/L of zinc oxide, 84-88g/L of phosphoric acid having a concentration of 85%, 16-20g/L of zinc dihydrogen phosphate, 22-26g/L of monocalcium phosphate, 6-8g/L of nickel sulfate, 4-6g/L of magnesium sulfate, 10-12g/L of tartrate, 4-6g/L of sodium citrate, 12-14ml/L of hydrogen peroxide and the balance water. The preparation method comprises the following steps of 1, mixing zinc oxide and water to obtain paste and carrying out stirring to obtain a uniform mixture, 2, slowly adding phosphoric acid into the zinc oxide paste with stirring until dissolution, 3, orderly adding zinc dihydrogen phosphate, monocalcium phosphate, nickel sulfate, magnesium sulfate, tartrate, sodium citrate and hydrogen peroxide into the solution obtained by the step 2 and carrying out stirring until dissolution, and 4, adding the rest of water into the solution obtained by the step 3 to adjust free acidity to 12-15 and total acidity to 70-90.

Provided are a coating composition for delayed release preparation capable of releasing a drug promptly in the stomach, without causing a time-dependent change, after a time (lag time) in which a solid preparation does not release the drug; and a solid preparation obtained by coating of the coating composition. More specifically, provided are a coating composition comprising at least a nonionic water-soluble cellulose ether and a cellulose-based enteric base material, wherein a weight ratio of the nonionic water-soluble cellulose ether to the cellulose-based enteric base material is from 95:5 to 65:35; and a solid preparation comprising at least a drug-containing core and the coating composition which covers the core, wherein the preparation can permit prompt dissolution of the drug in a stomach after a lag time.

This invention relates to the Sb2Te3 single-crystal nanometer line ordered array and its making method, the character is that the solutin is composed of the following componets: the citric acid coordination Sb3+; 4í†1 by Moore chroma,, nitrate dissolution Te power, 2í†3 by the SbO+í†HTeO2+ Moore chroma, wherein the pH of the plating liquid is 1-3, it uses the porous alumina templetits in the plating liquid as its working electrode and the black lead as its assistant electrode, its current density is controlled between 0.2mA/cm2 and 0.5mA/cm2, plating 0.5-2h can obtain the Sb2Te3 compound single-crystal nanometer line which grows in the 110 direction; and its single-crystal with hexagonal crystal series structure grows in the 110 direction, wherein the crystal cell parameter as follows:aú¢bú¢0.426nmíócú¢3.05nm. this invention fistly is under the condition of room-temperature and open system, and it uses electrochemical sediment principle to make the Sb2Te3 single-crystal nanometer line ordered array; the device in this invention is simple, which is easy to operate, and it fits for industry production.

The invention discloses an ultrasonic improved fabric dyeing device and a process thereof. The ultrasonic improved fabric dyeing device comprises a dyeing furnace and a workbench; a dyeing cylinder isfixedly arranged in the dyeing furnace; a temperature sensor A is fixedly mounted on an inner side of the dyeing cylinder; an electric heating thermostatic water bath is fixedly arranged on an outerside of the dyeing cylinder; a support A is arranged on an upper end of an inner cavity of the dyeing furnace; and an ultrasonic transmitter A and a transducer A are arranged on an upper end of the support A. The ultrasonic improved fabric dyeing device and process can measure and obtain the dyeing rate at different dyeing temperatures and radiation frequencies, and compare and obtain the dyeing temperature and the radiation frequency at the best dyeing rate; an ultrasonic frequency signal emitted by an ultrasonic transmitter B is converted into co-frequency mechanical vibrations through a transducer B, the dye liquor is irradiated in an ultrasonic longitudinal wave form so as to enhance the stirring and diffusion effect of the dye, the dissolution of the soluble dye is accelerated, and the dyeing rate is improved. The best dyeing temperature and radiation frequency can be measured when different fabrics are dyed so as to improve the dyeing rate, and measurement is convenient.

The invention discloses ecological jelly based on bean curd and bean curd jelly and a preparing method thereof. The ecological jelly is prepared from, by weight, 20-30 parts of soybean, 1-3 parts of lactone, 1-3 parts of day lily, 1-3 parts of agaric, 1-2 parts of chicken essence, 2-4 parts of starch, 2-4 parts of eggs, 8-20 parts of sugar cane juice, 10-13 parts of lotus root starch, 5-12 parts of peel meal and 150-200 parts of water. According to the ecological jelly based on the bean curd and the bean curd jelly and the preparing method thereof, the solidified state of the bean curd or the bean curd jelly is prepared from the bean powder and thus a bean-like jelly is formed. The lotus root starch and the peel meal are added to promote the bean powder gelation, and occurrence of dissolution is avoided when the bean-like jelly is vibrated or at a high temperature. The bean powder and the sugar cane juice are adopted as base materials by the bean-like jelly to support the bean curd jelly, and the bean-like jelly has high nutritive value and the functions of maintaining beauty and keeping young.

The invention relates to a method for synthesizing meropenem trihydrate and belongs to the technical field of synthesis of carbapenem antibiotics. The method for synthesizing meropenem trihydrate provided by the invention comprises the following steps: using protected meropenem (I) as a raw material, using a single solvent water as a reaction solvent, performing deprotection reaction with a non-hydrogen reducing agent in the presence of an alkali and a catalyst, and obtaining a target product meropenem trihydrate (II). The method provided by the invention is low in cost, not only solves the problem of dissolution of the catalyst by the reaction solvent, but also has advantages of less equipment investment, simple operation, mild reaction conditions, good selectivity, stable process, high yield and the like, and is suitable for industrial production.

The invention discloses a method for extracting caffeine in tea by low temperature crystallization. Through immersion, extraction, chloroform recovery, dissolution, filtration, decoloring filtration and natural crystallization, high purity caffeine is prepared. The whole method for extraction is carried out at a low temperature, has low energy consumption and high efficiency, is realized conveniently, has easily operatable and simple processes, a high extraction rate and can produce high purity caffeine.

[Problem] To provide a continuous gas reaction device and the like having a small, simple structure, capable of continuous and high-volume processing of substances being processed, and capable of suppressing the generation and growth of scales in downstream processes. [Solution] A gas reaction device connecting reaction vessels (3A-3D) in a multiple-stage line, solid slurry (S) or liquid and gas (G1-G4) being caused to react in each reaction vessel, the gas reaction device being a continuous gas reaction apparatus (3) or the like that causes the diffused-air state of the gas to vary in each reaction vessel according to the reaction in each reaction vessel. The variation of the diffused-air state of the gas can be performed by varying at least one of the flow amount of the gas being diffused, the gas-bubble diameter, and the type. The solid slurry or the liquid and gas can also be used as the substance caused to react with each other to induce scales. When solid slurry or liquid must be generated outside the reaction vessel (3), a dissolution vessel (2) may be arranged at the stage before the reaction vessel (3A).

The invention relates to a method for converting a traditional bath ratio reactive dye dyeing prescription into a small bath ratio reactive dye dyeing prescription. The conversion method is as the following: a. keeping a required reactive dye total amount consistent with the reactive dye total amount required in an original traditional bath ratio reactive dye dyeing prescription; b. maintaining the lower limit value of a small bath ratio salt concentration at the salt concentration of the original traditional bath ratio, and maintaining the upper limit value of the small bath ratio salt concentration at a value obtained by multiplying the salt concentration of the original traditional bath ratio by a multiplying factor, which is a ratio of the original bath ratio to the current bath ratio; c. controlling the lower limit value of a small bath ratio soda ash concentration at the soda ash concentration of the original traditional bath ratio, and controlling the upper limit value of the small bath ratio soda ash concentration at a value obtained by multiplying the soda ash concentration of the original traditional bath ratio by a multiplying factor, which is a ratio of the original bath ratio to the current bath ratio; and d. during dyeing solution preparation, first adding a neutral salt into water for dissolving, and then adding the reactive dye into the brine solution for dissolution. The method can make the dyeing depth of a fabric dyed by the small bath ratio reactive dye in accord with the dyeing depth of a fabric dyed by the traditional bath ratio reactive dye, i.e. Delta E DE is less than or equal to 1. And the conversion method is simple and fast.

The invention discloses a novel method for purifying an arsenic chelating type immune complex. The method comprises steps as follows: S1, a chelating agent solution is prepared firstly through dissolution of a chelating agent in a solvent; S2, a proper amount of carrier protein is taken and added to a borate buffer solution, and a carrier protein solution can be prepared; S3, the prepared chelating agent solution is added to the carrier protein solution, the carrier protein solution is put in a constant-temperature water bath and stirred uniformly for constant-temperature water bathing, and amixed solution can be obtained; S4, a semipermeable membrane is homemade; S5, arsenic ions and other heteroions which are not chelated are removed through pre-purification; S6, unbound carrier proteinis removed. Part of articles are homemade in the purification process, so that the purification cost can be notably reduced, the requirements for working environments are lower, the applicable rangeis wider, the purification time is effectively shortened by use of a combined chromatographic column, and the cost is reduced to a certain extent.