54 results about "Drop Solution" patented technology

This invention relates to a method for synthesizing ZSM-5 zeolite molecular sieve, especially a method for rapidly synthesizing ZSM-5 zeolite molecular sieve with small grains. The method comprises: (1) adjusting the pH value of a mixture of silicon source and deionized water with an acid solution, stirring for hydrolysis, and adding organic templating agent to obtain solution A; (2) dissolving aluminum source with deionized water to obtain solution B; (3) dropping solution B into solution A slowly, and adding molecular sieve seed crystal; (4) placing the mixture into a hydrothermal kettle, crystallizing, washing the product, centrifuging, drying and torrefying to obtain ZSM-5 zeolite molecular sieve with small grains. The method is simple and time efficient, and the obtained ZSM-5 zeolite molecular sieve has small and uniform grains.

This invention discloses a method for preparing Ag/TiO2 composite film. The method coprises: (1) dissolving Ti compound in an organic solvent to obtain solution A; (2) mixing water, complexing agent, organic solvent and AgNO3 powder to obtain solution B; (3) dropping solution B into solution A, and strring to obtain a stable sol; (4) coating the sol onto a clean carrier by soaking and drawing, and treating at 450-600 deg.C to obtain Ag/TiO2 film. The method and equipment in this invention is simple. The content of Ag in the film is high, thus the obtained Ag/TiO2 film has good photocatalytic performance and high conductivity.

The present invention discloses hydrothermal process of preparing nanometer hydroxyapatite colloid. The preparation process includes the following steps: 1. dissolving citrate of 0.774-309.6 weight portions and calcium salt of 1.64-262.6 weight portions in water of 200-5000 weight portions to compound solution A; 2. dissolving phosphate of 0.894-357.6 weight portions and forming Ca/P weight ration of 1.5-1.67 in water of 50-1200 weight portions to compound solution B; 3. heating solution A to 20-60 deg.c, preferably to 40-50 deg.c, and dropping solution B to solution A in 5-60 min; 4. heating after dropping to 60-100 deg.c while stirring to react for 2-6 hr to obtain nanometer hydroxyapatite colloid particles dispersed stably in water phase; and 5. ultrafiltering to eliminate salt from the nanometer hydroxyapatite colloid solution until reaching the filtrate conductivity of 20-200 microsecond/cm to obtain the purified nanometer hydroxyapatite colloid solution.

The preparation process of nano composite titania/bentonite material includes the following steps: 1) adding water into sodium base or calcium base bentonite for expanding and shearing at high speed to obtain bentonite suspension; 2) adding TiCl2 into anhydrous alcohol via stirring and ageing to prepare transparent solution A; 3) dropping solution A into the mixed solution of glycerin and water in certain volume ratio via stirring and ageing to prepare transparent solution B; and 4) dropping bentonite suspension in certain amount into solution B while stirring, reacting inside one high pressure reactor with PTFE lining at 80-200 deg.c for 1-15 hr, washing the discharged product until no Cl ion and drying. The process is simple, practical and suitable for industrial production, and the product is a excellent photocatalyst.

The catalyst consists of Cu, Zn, Al2O3 and carbon nanotubes (CNTs) and has the constituents including Cu 10-55 wt%, Zn 4-30 wt%, Al 0-7.5 wt% and CNTs 5-80 wt%. The CNTs are multilayer wall ones with outer diameter of 10-50 nm, inner diameter of 2-4 nm, carbon content over 99 wt%, graphite carbon content over 80 wt%, and specific surface area of 100-160 sq m/g. The catalyst is prepared through preparing solution A of nitrate in the material metal components; preparing solution B of Na2CO3 in the equivalent concentration; coprecipitating reaction in a reactor with CNTs by dropping solution A and solution B in equal speed at 353K or soaking CNTs in mixed water or ethanol solution of nitrate; drying and burning. The catalyst has high and stable activity, high CO converting rate and high methanol yield.

The preparation process of nanometer calcium phosphate particle includes the following steps: dropping solution containing calcium ion slowly into mixed solution containing phosphate radical ion and cetyl trimethyl ammonium bromide (CTAB), dropping alkali solution to regulate pH value of the solution to obtain calcium phosphate sol, filtering after reaction to obtain precipitate, washing the precipitate for several times, and vacuum drying to obtain nanometer calcium phosphate particle of average size smaller than 100 nm. Altering the amount of added CTAB during reaction can change the diameter of the prepared nanometer calcium phosphate particle in 20-80 nm effectively.

The invention relates to a process for preparing nanocrystalline lead stannate, in particular a process for preparing ferro-electrical functional ceramic material, wherein water dissoluble inorganic salt precursor is utilized, the raw material being, PbNO3 (analytical pure), SnCl45H2O (analytical pure), NaOH (analytical pure), HNO3 (analytical pure), and the preparation process comprises the steps of, producing solution A by dissolving PbNO3 and SnCl4-5H2O with mol ratio 1:1 into HNO3 solution, then dissolving NaOH into deionized water to prepare solution B with pH=12, dropping solution an into solution B of equal quantity, maintaining the temperature at 80 deg. C, stirring about 8 hours by magnetic stirrer, maintaining pH=11, thus obtaining lacte colloidal sol, finally heating and dehydrating to obtain the high purity PbSnO3 polycrystalline powder of 10 nm sizes.

The invention discloses a wire drawing oil circulation treatment device, which comprises an oil storage pool, a spraying header, a collecting tank and an oil pump, wherein the spraying header is connected with the oil storage pool through a pipeline; the oil pump for pumping out solution in the oil storage pool is connected with the oil storage pool; the spraying header is arranged above bare copper flat wires of a drawbench; the collecting tank for collecting dropped solution is arranged below the bare copper flat wires of the drawbench; and the collecting tank is connected with the oil storage pool. The device is beneficial for cooling the bare copper flat wires rapidly, ensures the effect of sufficient lubrication and improves the quality of bare copper flat wires; and meanwhile, the wire drawing oil can be used in long-term circulation with low production cost.

A preparation method and purposes of photosensitivity polymer base carbon nanotube disperse auxiliary are provided. The preparation steps comprise (1) dissolving polystyrene maleic anhydride and 7- amino-4- methylcoumarin into dimethylsulfoxide; (2) feeding nitrogen to a container of step (1) for 30-60 minutes, sealing the container and keeping stirring, heating the container to 30 DEG C to 40 DEG C, reacting in heat insulation mode for 48-72 hours; (3) dropping solution in step (2) into mixed solvent with the volume ratio of petroleum ether and water as 1:4 under the condition of stirring, and performing suction filtration to obtain a solid; and (4) further processing the solid through dissolution, deposition and suction filtration, performing vacuum drying on an obtained pale yellow solid, and obtaining a photosensitivity polymer. The application steps comprise (1) dissolving the polymer into water-base solvent, adding carboxyl or hydroxyl to functionalize a carbon nanotube, vibrating the polymer in an ultrasonator for 5-30 minuts; and (2) illuminating the solution of step (1) under ultraviolet light for 0-60 minutes to obtain polymer base carbon nanotube dispersion liquid. The preparation method of the photosensitivity polymer base carbon nanotube disperse auxiliary is mild in preparation condition and convenient and simple to operate. An obtained polymer can remarkably improve the dispersion stability of a carbon nanotube in the water-base solvent.

Relative movement occurs between the in-process substrate and the dropping section. While the substrate is rotated, the dropping section is relatively moved from an approximate center of the substrate toward an outer periphery thereof. While the dropping section relatively moves from the approximate center of the in-process substrate toward the outer periphery, the rotational frequency w for the substrate is decreased so that the solution film should not move due to the centrifugal force applied to a dropped solution film. Concurrently, feed rate v for the liquid from the dropping section is increased to form a solution film on the in-process substrate.

The invention discloses a stirring type production device for flaky microcapsules. The production device comprises a gel delivering and dropping system and a microcapsule forming system, wherein the gel delivering and dropping system comprises a gel delivery pump and a gel dropper, and the gel delivery pump is used for delivering a gel solution to the gel dropper at the set flow velocity; the gel dropper is tubular, one end is communicated with a solution outlet of the gel delivery pump, and the other end is located above the microcapsule forming system and enables the gel solution to drop from the gel dropper in a drop or column form; the microcapsule forming system comprises a forming tank and a stirrer, and the forming tank is located below the gel dropper and used for containing a salt solution; a stirring rotor of the stirrer is located in the forming tank and used for driving the salt solution to rotate. The production device has the advantages of simple technology, convenience in operation, capability of realizing continuous production, small occupied space and the like.

The invention discloses an environment-friendly composite textile finishing agent and a preparation method thereof. The preparation method includes adding octamethylcyclotetrasiloxane and potassium hydroxide into a 250 mL dry flask fitted with a rotary condensing tube, a stirrer, a dripping funnel and a thermometer, stirring, heating, dropping N-beta-aminoethyl-gamma-aminopropylmethyldimethoxysilane into the flask through the dripping funnel when liquid temperature rises to 40-60 DEG C, heating to 135 DEG C, holding the temperature of 135-140 DEG C when liquid viscosity rises 0.5 hour later, and allowing to react for 6 hours to obtain a colorless transparent viscous liquid. Organosilicon-polyurethane, a mixed liquid and organosilicon quaternary ammonium salt modified polysiloxane are mixedthrough a mixing device, so that working efficiency is improved, and fusing is better; synergistic effect helps impart good antibacterial, anti-wrinkle, softening, hydrophilic and flame-retarding properties to the finishing agent; the synthetic method herein is simple to perform, causes no environmental pollution and is expectedly suitable for environment-friendly industrial production.

Cathode material is composed of 60-70%(Wt) sulfurization crosslinking PVC, 10-15% binder; 15-30% conduction agent. Preparation method includes following steps: obtaining solution of sodium polysulphide by dissolving mixed anhydrous sodium sulfide and sublimed sulfur in solvent of N,N-dimethylformamide; obtaining solution of PVC by dissolving PVC in solvent of N,N-dimethylformamide; obtaining sulfurization crosslinking PVC by dropping solution of sodium polysulphide to solution of PVC; powder product is obtained after dry. The disclosed cathode material grafts structure of multi sulfur linkage to framework of chain polymer to fix up S-S structure. Features are: no pollution in synthesizing process, high energy density and favorable charging and discharging cycle.

The invention relates to a carvanol solubilizing solid composition and a preparation method and application thereof, wherein the preparation method of the carvanol solubilizing solid composition comprises the following steps: (1) modifying beta; Cyclodextrin is dissolved in water at 50 DEG C to obtain a clarified solution A; 2. Prepare solution B from carvanol and absolute ethanol according to that volume ratio of 1: 1; 3) drop solution B into solution A, stirring at 50 DEG C for 6 hour, cooling to room temperature, placing in refrigerator at 4 DEG C for 10 hours, filter, precipitating with water in turn, washing with absolute ethanol, and vacuum drying to obtain that carvanol solubilizing solid composition.

The invention relates to the preparation and application of a natural vegetable oil modified MOF structure polyoxide. The preparation method comprises the following steps: (1) preparing a precursor: mixing natural vegetable oil, a surfactant and a cosurfactant to prepare solution A; dissolving nickel salt and cobalt salt in water to obtain B solution; Taking the dispersion of nanometer titanium dioxide as C solution; Mixing an organic acid containing two or more carboxyl functional groups with water to prepare a D solution; Mixing solution A and solution D under the condition of water bath stirring, then dropping solution B and solution C in turn to form water-in-oil emulsion, continuing stirring under the condition of water bath, cooling, separating and drying to obtain precursor; (2) calcining the precursor to obtain polyoxides. The preparation method of the invention has the advantages of simple steps, easy realization and control, and the prepared material has high initial chargingand discharging efficiency, high specific capacity, good rate performance and cycle performance.

The invention discloses a method for detecting and evaluating degree of water repellence of granular substances such as soil mass and the like and belongs to the fields of environmental geotechnical engineering, disaster prevention and mitigation engineering, soil science and the like. According to the method, two glutaraldehyde solutions with a volume ratio of glutaraldehyde (50%) to deionized water being 1:3.5 and 1:0.2 respectively are prepared from glutaraldehyde (50%) and the deionized water, and the granular substances such as soil mass and the like with different degrees of water repellence are detected with a glutaraldehyde drop solution infiltration time method; during dropping, each drop of liquid is 0.05 ml, and time required for whole liquid infiltration is recorded; accordingto surface dimension and form of a sample, titration positions are distributed in a regular triangle shape in the center of the sample surface, and a tested average value of three points is taken as afinal result; water repellence and water repelling level of the sample are determined by referring to classification criterion of degree of water repellence. According to the method, a reagent is simple to prepare, operation is convenient and fast, cost is low, and detection precision is high.