307results about How to "Operating conditions are easy to control" patented technology

The invention relates to a mango preserving technology. In order to achieve integrative pre-plucking and post-plucking preserving effect, the invention comprises four composite preserving pretreatment measures of disinfectant and calcium fertilizer spraying before mango plucking and heat treatment, rot-proof film-coating preservative treatment and ethylene inhibitor treatment after the plucking. The rot-proof film-coating preservative comprises 0.25 percent to 2 percent of glucomannan or/and 0.25 to 2 percent of CTS with 95 percent degree of deacetylation, 0.1 to 1 percent of sucrose fatty acid ester or/and 0.1 to 1 percent of glycerel monostearte, 0.1 to 0.5 percent sorbitol or glycerol, 0.5 to 1.5 percent of calcium chloride or calcium citrate, 0.05 to 0.1 percent of potassium sorbate, 0.01 to 0.1 percent of one or more of the following ingredients: iprodione, Sportak and mancozeb, 0.005 to 0.01 percent of gibberellin and 0.025 to 0.05 percent of vitamin K. The invention can decrease the respiratory intensity, postpone the respiratory climacterics, delay the postripeness time and prolong the freshness period of mangos. Compared with the prior art, the freshness period of the mangos can be prolonged by 10 to 20 days.

The invention discloses a probe reagent for concurrent selection and determination of multiple metal ions, and preparation and appliance, and belongs to the field of organic synthesis and analytical chemistry. Tri (2-aminoethyl) amine serves as a parent, wherein rhodamine B is connected to an amino chain, 2-hydroxy-1-naphthaldehyde groups are connected to other two amino chains respectively, and thus a tripod structured rhodamine-hydroxyl naphthalene derivative probe is prepared. In 1,4-dioxane/water (19/1, v/v, pH=7) solution, the probe respectively detects Cu2+, Co2+ and Fe3+ by utilizing rate absorption of different wavelengths, and the detection does not interfere with each other; in acetonitrile/water (19/1, v/v) solution, fluorescence emission of different wavelengths under different pHs is utilized, the probe respectively detects Zn2+, Al3+, Hg2+ and Cu2+, and the detection does not interfere with each other; under an ultraviolet lamp of 365 nm, Zn2+, Al3+ and Hg2+ are detected to show blue, pink and orange red fluorescence respectively, and through -Zn2+ mixture detection by the probe, Cu2+ shows blue fluorescence vanishing. The probe structure is as follows.

The invention pertains to the technical field of medicine preparation and relates to a vibration-crushing micro-pill machine which comprises a liquid storage pot, a pill dripping system, a cooling circulation device, a micro-pill collecting machine and a control circuit, wherein the pill dripping system comprises a dropper, a jet hole, a vibration exciter and a gear pump. The dropper is connectedwith the vibration exciter by a rigid connecting rod. The lower part of the dropper is provided with one or more jet holes, the upper part of which is a liquid inlet and the lower part thereof is a nozzle. The dropper is connected with an electric valve at the lower part of the liquid storage pot by pipes on which the gear pump is arranged. The side wall of the dropper is provided with two insertion holes in which a heater and a temperature sensor respectively connected with the control circuit are arranged. The control circuit controls the make-and-break of the heater according to the detected temperature of the temperature sensor. The cooling circulation device comprises a condensation column, a stirring device, a filter, a cooling cylinder, a cooling pump and an electromagnetic pump. The vibration-crushing micro-pill machine has the advantages of chance of batch production of micro-pills, high production efficiency, simple equipment structure and convenient control.

The invention belongs to the technical field of material preparation, and particularly relates to a synthesis method for low-temperature manganese-based compound metal oxide denitration catalysts. According to the method, a manganese salt and a salt from a cobalt salt, a ferric salt or a nickel salt are dissolved in ethylene glycol in a mixed manner; a sodium carbonate water solution is dripped at a low temperature, and coprecipitation is carried out; and coprecipitation products are washed by water, are dried, and are calcined in the air, and products can be obtained. The synthesis method provided by the invention adopts a low-temperature artificially induced crystal splitting technology, one kind of ions from cobalt ions, ferric ions and nickel ions are added, and manganese ion precipitate crystals are induced to split in the manganese ion precipitate crystal growth process. The split crystals do not agglomerate during the growing in low-temperature environment. After the crystals after splitting growth are calcined, manganese-based compound metal oxides with high specific surface area can be obtained, and the manganese-based compound metal oxides can show excellent low-temperature catalytic activity when being used for catalyzing a denitration reaction. The synthesis method has the advantages that the operation is simple, the control is easy, and raw materials can be easily obtained, so the synthesis method is suitable for large-scale production, and in addition, the environment pollution is little.

The invention belongs to the technical field of metal-organic framework materials, and relates to a method for preparing a polynary nano-cage composite material by using a zeolitic imidazolate framework as a template. The method comprises the following steps: synthesizing a ZIF-67 framework through a solvothermal technology by using methanol as a solvent, and synthesizing a hydroxide precursor from nickel nitrate and zinc nitrate by adjusting a mass ratio of the zinc nitrate to the nickel nitrate; and sequentially centrifuging, washing, drying and calcining the hydroxide precursor to obtain the nano-cage composite material. The method has the advantages of simple process, low price, easiness in control, and low cost, and the prepared product is a nano-cage composite material having a non-spherical hollow structure, and has the advantages of large specific surface area, high crystallinity, good morphology, and easiness in realization of industrialization.

The invention discloses a method for preparing polycrystalline cubic boron nitride, which comprises the following steps: using cubic boron nitride and a bonding agent as raw materials, mixing the cubic boron nitride and the bonding agent and then ball-milling the mixture, wherein the ball material ratio during the ball milling is (1-4):1, the rotating speed is between 400 and 800 revolutions per minute, and the ball milling time is between 4 and 20 hours; drying the mixed mixture after the ball milling, adding an organic binder into the mixture after drying, mixing the mixture evenly, and screening the mixture through a 100-mesh screen; performing cold compression and forming with the pressure of between 0.8 and 2 GPa; and sintering the formed green body at a sintering temperature of between 1,000 and 1,300 DEG C, and keeping the temperature for 4 to 20 hours so that the finished product is obtained after the sintering. The polycrystalline cubic boron nitride PcBN prepared by the method is gray and is a compact block which has the superior performances of high hardness, high grinding efficiency, good impact resistance toughness, easy conditioning, good grinding quality and the like. The method has the advantages of simple equipment, easily-controlled operation, low cost and easy large-scale production, has favorable social value and economic value, and is easy to popularize and apply.

A process for extracting natural capsicine from hot pepper powder or the hot pepper extract as the by-product obtained after extracting rutilant pigment from hot pepper features that the alcohol, ethylether, acetone, petroleum ether, or ethyl acetate is used as extractant, a separation accelerator is used to prevent the generation of the third phase, a saponifying activator is used for speeding up saponifying reaction at low temp (28-35 deg.C) and a cleaner is used for stable crystallizing. Its advantages are high purity (more than 99%), and low cost.

The invention discloses a bismuth tungstate composite photocatalyst modified by a nitrogen-doped carbon quantum dot and a preparation method and application thereof. The composite photocatalyst is characterized in that bismuth tungstate is taken as a carrier, and is modified with the nitrogen-doped carbon quantum dot. The preparation method comprises the following steps: mixing bismuth nitrate, sodium tungstate and water, and stirring the mixture to obtain a bismuth tungstate precursor solution; mixing the bismuth tungstate precursor solution with a nitrogen-doped carbon quantum dot solution, and stirring the mixture to obtain a mixed solution; performing a hydrothermal reaction to obtain the bismuth tungstate composite photocatalyst. The composite photocatalyst has the advantages of environmental friendliness, high photo-induced electron-hole separating efficiency, high light absorbing efficiency, high photocatalysis activity, high photocatalysis stability and high corrosion resistance; the preparation method has the advantages of simple preparation process, low raw material cost, and easiness in controlling operation conditions. The composite photocatalyst is used for catalyzing degradation of antibiotic wastewater, and has the advantages of simple application method, high degrading efficiency and high repeatability, and has a very good practical application prospect.

The invention relates to the field of mineral materials, in particular to a method for preparing ultrafine high-whiteness active barite powder. The method comprises the following steps of: (1) preparing pulp from 325-mesh barite powder, and performing wet ultrafine grinding until the particle size is less than 10mu m; (2) filtering the barite pulp subjected to wet ultrafine grinding, and drying; (3) adding mixed acid into the dried ultrafine barite powder, and performing oxidation leaching reaction with stirring, wherein the mixed acid is a mixed solution of sulfuric acid, hydrofluoric acid and oxalic acid; (4) filtering the barite powder subjected to oxidation leaching reaction by the mixed acid, and washing until the pH is 6 to 7; and (5) performing pressure filtration, and drying to obtain the ultrafine high-whiteness active barite powder. The preparation method is simple and controllable and easy to popularize, equipment can be localized completely, over 99 percent of prepared barite product has the particle size of -10mu m, and the whiteness is over 90 percent.

The invention discloses a resource treatment method for a sodium chloride waste salt in the process of dye production. The method comprises the steps: in an oxygen-free environment and under differenttemperature conditions, removing water in the waste salt, gasifying small-molecule organic matter, splitting aromatic ring substances, carbonizing naphthalene, anthracene and fused ring substances, then dissolving the obtained salt, removing carbonized particles so as to a purified sodium chloride solution, and performing bipolar membrane electrolysis on the obtained sodium chloride solution so as to prepare a sodium hydroxide solution and dilute hydrochloric acid. The whole treatment process is simple, efficient, economical and feasible, and meanwhile resource recovery and utilization of thesodium chloride waste salt, the split small-molecule organic matter and carbonized product are realized.

The invention discloses a preparation method of a graphene/stannic oxide quantum dot composite electrode material for a lithium ion battery. In the sample preparation process, that graphene-supported stannic oxide quantum dots are synthesized under relatively mild experiment conditions by utilizing a wet chemical method, and urea is adopted as a reducing agent to reduce graphite oxide, so that the preparation method has the advantages of simple and controllable reaction conditions and low production cost; by introducing graphene, not only can the conductivity of the composite material be improved but also volume change in the stannic oxide charge-discharge process can be effectively buffered; therefore the composite material shows good cycling stability.

The invention relates to a preparation method for a nano silicon dioxide modified organic silicon sealant for packaging of a light emitting diode (LED). As silane coupling agent modified nano silicon dioxide is added into chlorosilane hydrolysis and polycondensation system, the compatibility of the nano silicon dioxide and organic silicon resin is sharply improved; a small quantity of curing agent, catalyst and defoaming agent are added, the mixture is mixed uniformly and then is cured at room temperature so as to prepare the nano silicon dioxide modified organic silicon sealant. The preparation method is simple, has low cost, and can prepare a series of high refractive index and high transmittance packaging sealants for multiple LED electron components, and the operation conditions are easy to control.

The invention relates to a preparation method of a sulfur-containing carbon material as well as the sulfur-containing carbon material prepared by using the preparation method. The preparation method comprises the following steps of: with sulfate, sulfite or a calcined product of the sulfate or the sulfite as a template agent, and reacting with a carbon source through a gas phase chemical deposition method or a groove liquid phase impregnation method so as to prepare sulfur-containing graphene or porous carbon. The sulfur content of the prepared sulfur-containing graphene or porous carbon is 0.1-30% in percentage by mass. By using the gas phase chemical deposition method or the groove liquid phase impregnation method, sulfur-containing graphene or porous carbon can be prepared in batch. The operation condition of the method is easy to control and the operation cost is low.

The invention relates to a method for producing alumina from bauxite. The method adopts sodium hydroxide solution in high molecular ratio, can efficiently extract alumina from indissolvable-diasporite type bauxite at low temperature under the normal/low pressure, is mild in operation conditions, and has actual dissolution rate up to over 90 percent. After stripped slag-containing suspension is subjected to flash evaporation cooling to crystallize and precipitate sodium aluminate hydrate crystals, the sodium aluminate hydrate crystals are dissolved in water or dilute alkali solution and then subjected to desilication, seed precipitation and calcination so as to obtain alumina meeting the requirements of metallurgical grade. Slag is dealuminized through sodium aluminate hydrate crystallization mother liquor and then is subjected to sodium removal so as to effectively reduce the content of sodium oxide and alumina in red mud, enable the composition, alkali content and other main indexes of obtained red mud physical phase to meet the requirements of raw materials for producing cement, reduce the loss amount of alkali solution and raise the resource utilization rate of bauxite. Dealuminized stripping solution can be recycled for stripping bauxite, so that industrial operability is greatly improved.

The invention discloses a ceramic fiber filtering tube, a preparation method and a pressurization and suction forming device. The pressurization and suction forming device comprises a forming mold, apressurization pump, a dosage bunker, a vacuum pump and a vacuum filtrate tank, wherein the forming mold comprises an inner template, an upper template, a lower template, filter cloth and a blank tubecavity; the filter cloth and the blank tube cavity are arranged between the inner template and the upper template respectively; the filter cloth is arranged on the inner template; the lower templateis connected with the upper template; the upper and lower flange faces of the inner template are provided with sealing gaskets respectively; the top of the upper template is provided with a quick coupler for charging water or slurry; the quick coupler is connected with the pressurization pump; the pressurization pump is connected with the dosage bunker; the middle part of the lower template is provided with a water outlet for discharging water or slurry; the water outlet is connected with the vacuum filtrate tank; the vacuum filtrate tank is connected with the vacuum pump; a vacuum pressure gauge and a blow-off valve are arranged between the vacuum filtrate tank and the vacuum pump. The pressurization and suction forming device adopts a pressurization forming and suction sizing demolding form, is simple in structure, is convenient for forming, and is convenient to operate.

The invention provides a method for simultaneously producing dimethyl carbonate and dimethyl ether through a urea alcoholysis process, a catalyst used thereby, and a preparation method of the catalyst. The method for simultaneously producing dimethyl carbonate and dimethyl ether through a urea alcoholysis process adopts a two-stage slurry bed reactor or fixed bed reactor technology, and in the preparation process, when dimethyl carbonate and dimethyl ether are prepared from methyl carbamate and methanol in a second-stage fixed bed reactor, a multi-component composite oxide catalyst using one or more of transition metal oxides, rare earth oxides, alkali metal oxides, alkaline earth oxides, IVA group metal oxides, VA group non-metal oxides or IIIA group non-metal oxides and Al2O3 as active components is filled into the fixed bed reactor, so the methyl carbamate conversion rate is improved, and the dimethyl carbonate and dimethyl ether selectivity is substantially improved.

The invention discloses a new process for producing fluoride and a white carbon black coproduct by adopting fluosilicic acid or fluosilicate. A method for adding SiO2 particles in a process of hydrolyzing fluosilicate for promoting generation of SiO2 crystal nucleus reaction product is adopted, reaction temperature is reduced, reaction efficiency is improved, and a hydrolysis process is more complete. The new method for producing fluoride and white carbon black by adopting fluosilicic acid or fluosilicate provides an effective way for recycling of fluoride-containing waste water.

The invention discloses flame-retardant wallpaper as an indoor wall decoration material and a preparation method thereof. The preparation method for the flame-retardant wallpaper includes the following steps: after being immersed in a flame retardant solvent, a decorative veneer and a wallpaper substrate (backing paper) are ultrasonically immersed, so that a flame-retardant decorative veneer and a flame-retardant substrate are obtained; the flame-retardant decorative veneer is attached onto the surface of the flame-retardant substrate. The flame-retardant property of the wallpaper is good, the potential fire risk is low when the material burns, and the flame-retarding effect is remarkable; the smoke suppression effect is obvious, the amount of CO released from smoke is obviously reduced, toxic CO gas can be partially turned into non-toxic gas, and the wallpaper has a good effect of suppressing CO released at fire scenes. Moreover, since the adopted materials are natural materials, the wallpaper is safe to use.

The invention discloses a preparation method of a super-hydrophilic anti-fogging oxidized graphene coating. The preparation method comprises the following steps: taking graphene micro powder as a raw material, adopting a wet chemical oxidation method to prepare oxidized graphene dispersion liquid, and carrying out filtration, rinsing, ultrasonic dispersion and centrifugal separation to obtain the super-hydrophilic anti-fogging oxidized graphene coating. In addition, the invention further discloses a method of adopting the coating to prepare a super-hydrophilic anti-fogging oxidized graphene coating layer. The preparation method disclosed by the invention is simple in technology, low in cost, green and environment-friendly, and easy in operating condition control. The obtained oxidized graphene coating is excellent in performance, wide in application range, and capable of being applied to relatively transparent common glass or organic transparent carrier. The prepared super-hydrophilic anti-fogging oxidized graphene coating layer has the excellent characteristics of super-hydrophilicity, anti-fogging property, high strength, long durability, high transmission of light and the like. The preparation method of the super-hydrophilic anti-fogging oxidized graphene coating effectively solves the problem that the existing coating layer is poor in anti-fogging effect and durability, and is favorable to promote application and development of the super-hydrophilic technology.

The invention discloses a making method of rhodiola root glycoside,which comprises the following steps: a. adding water to dissolve crude extract of rhodiola root; adjusting pH value as alkaline; filtering to obtain the filtrate; b. adjusting the filtrate to acid; adsorbing through adsorbing resin; eluting; condensing the eluent; sedimenting the eluent in the alcohol; filtering to obtain the filtrate; c. drying the filtrate through adsorbing resin; adding the dried material into column chromatograph; collecting the chromatographic liquor; d. condensing the chromatographic liquor; doing alcohol sediment; crystallizing. The invention also provides freeze dried and injection of the rhodiola root glycoside with simply and controllably operating condition and high safety, which is easy to accomplish for large scale of industrial manufacturing.

The invention discloses a 2-(2'-hydroxyl styryl) naphthyridine probe reagent and preparation and application thereof. The probe reagent is mainly prepared by concentrated sulfuric acid, sodium 3-nitrobenzene sulfonate, boric acid, FeSO4.7H2O, 2-amino-6-picoline, salicylide, glycerol and acetic anhydride. The 2-(2'-hydroxyl styryl) naphthyridine probe reagent has the advantages that the probe reagent can selectively detect various target ions, single-probe, multi-target and multi-mode identification and detection are achieved, and the probe reagent can be used for detecting Hg<2+>, Ag<+> and F<-> ions; a probe is simple in structure, low in preparation cost, diversified in detection and identification manners, high in detection sensitivity, good in selectivity, excellent in performance, easy in operation condition control and promising in application prospect.

The present invention discloses a novel fermentation tank, which comprises a tank body, a membrane filter and a pipeline; wherein, the membrane filter is arranged inside the tank body; one end of the pipeline is connected with the membrane filter in the tank; the other end of the pipeline leads out of the tank or leads out of the tank through a hollow stirring shaft. The membrane filter can be arranged on the wall of the tank through the pipeline or on the hollow stirring shaft, and the included angle between the membrane filter and the longitudinal axis of the tank is between 0 degree and 90 degrees. In the process of bio-fermentation, the fermentation tank can carry out membrane separation, the positive pressure inside the fermentation tank or / and the negative pressure outside the fermentation tank ensure that liquid-phase material can permeate the membrane and pass through the pipeline to reach other devices outside the fermentation tank, and suspended cells and intercepted granules are intercepted in the fermentation tank to keep fermenting. The novel fermentation tank utilizes the characteristic of the combination of the fermentation tank and the membrane separation, to realize the coupling of cell culture and product abstraction. The fermentation tank does not affect the growth and metabolism of cells, the reaction effect is good, the biochemical reaction system is stable, moreover, the cost is low, investment is little, and the fermentation tank is applicable to biological reaction.