35results about How to "Sufficient concentration" patented technology

The process of bleaching gauze with ozone water includes: compounding ozone water through introducing weak acid water solution into a barrel and adding surfactant; bleaching gauze after being enzyme scoured, alkali washed and water washed with ozone water in a bleaching kettle, and washing bleached gauze with cold water and hot water. During the bleaching process, ozone water is circulated between the bleaching kettle and the compounding barrel, and ozone is introduced into the compounding barrel to maintain the concentration of the ozone water. The process can bleach gauze homogeneously and the bleached gauze can reach whiteness over 90 %.

A metal ion eluting unit includes: at least one first electrode 102 serving as either a positive or negative electrode; at least one second electrode 103 serving as an electrode whose polarity is opposite to the polarity of the first electrode 102 and so arranged as to face the first electrode 102; and a driving means for applying a voltage between the first and second electrodes. The metal ion eluting unit elutes metal ions from the positive electrode by applying a voltage between the first and second electrodes while supplying water between the first and second electrodes. The polarities of the first and second electrodes are reversed periodically, and the current density of a current flowing between the first and second electrodes is controlled to be a predetermined value or more.

The invention discloses a mosquito-repellent perfume and a preparation method thereof, and relates to a perfume. The invention provides a mosquito-repellent perfume having little dosage and long effective mosquito-repellent time, and a preparation method thereof. The mosquito-repellent perfume comprises the following raw materials in percentage by mass: 3 to 5 percent of deet, 3 to 5 percent of emulsifier, 0.2 to 0.5 percent of beta-cyclodextrine, 0.05 to 0.1 percent of methylparaben, 0.2 to 0.5 percent of perfume, 3 to 6 percent of glycerin, 0.7 to 1 percent of sodium chloride, 15 to 20 percent of ethanol and the balance of water. The preparation method comprises the following steps of: adding the water, the ethanol, the deet, the emulsifier and the beta-cyclodextrine into a reaction kettle, and stirring to obtain a mixture A; adding the glycerin and the perfume into the mixture A, and stirring to obtain a mixture B; and adding the methylparaben and the sodium chloride into the mixture B, stirring, standing and defoaming to obtain the mosquito-repellent perfume. The obtained mosquito-repellent perfume is transparent liquid.

Provided is a water treatment method and a water treatment apparatus for elctrolyzing the water to be treated by detecting the quality and quantity of the water to be treated and adjusting the electrolytic density according to the state of the water to be treated. When sewage is treated by immersing electrodes 11A, 12A, 11B, 12B, 11C and 12C for electrolysis in an electrolytic cell 15 in a sewer pipeline 1 and producing hypo-halogenous acid, ozone or active oxygen in the sewage, the states of the sewage before and/or after the treatment are detected with a flow rate sensor 16 and a turbidity sensor 17, and the number of the electrodes to be energized (the area to be energized) and/or electric power to be supplied to each of the electrodes are controlled according to the detection result.

The invention discloses a smart sizing machine. The smart sizing machine comprises a base, a sizing box body is fixedly connected to the upper surface of the base, a control cabinet is installed at the top of the sizing box body, and the interior of the sizing box body is provided with a sizing mechanism, a fluffing mechanism, a drying mechanism and a rolling mechanism through partitioning plates.The smart sizing machine has the advantages that 1, through a PLC, signals obtained by monitoring the liquid level and size concentration of a sizing pond via a liquid level sensor and a size concentration sensor in real time are sensed to control a size supplementing pump to supplement size of a size supplementing pond into the sizing pond, and therefore the sizing pond has a sufficient size concentration and a sufficient size volume to size yarn; through the structure of a telescopic pipe, alarm sounds are made once the yarn is broken; through the PLC, a signal, detected by a pressure sensor, of pressure of an upper contact point exerted on a lower contact point is sensed to stop operation of a rolling motor and a fluffing motor, and accordingly the effect is realized that in the wholeprocess of sizing, work is rapidly stopped.

The invention provides a secondary deposition and dispersion process for a selective emitter battery. The secondary deposition and dispersion process is used for performing phosphorus source deposition on the surface of a crystalline silicon solar cell silicon slice, and comprises the following steps of: putting the crystalline silicon solar cell silicon slice into a first preset-temperature environment, and feeding a phosphorus source and oxygen until the phosphorus source is deposited to preset concentration, or putting the crystalline silicon solar cell silicon slice into a third preset-temperature environment, feeding the phosphorus source and the oxygen, and pushing the phosphorus source at first preset temperature until the phosphorus source is deposited to the preset concentration; and when the phosphorus source is deposited to the preset concentration, reducing the temperature to second preset temperature, continuing to feed the phosphorus source and the oxygen so as to perform phosphorus source deposition, and performing laser doping to obtain a crystalline silicon solar cell subjected to secondary deposition. After temperature reduction is performed, the phosphorus source and the oxygen are continued to be fed, so that the phosphorus source continues to be deposited on the surface of the silicon slice, and the concentration of the phosphorus source on the surface of the silicon slice is increased; a laser doping process is performed on the crystalline silicon solar cell silicon slice at relatively high phosphorus source concentration, so that relatively low laser energy can be adopted; and the required crystalline silicon solar cell can be obtained.

The invention discloses a process for treating oil production wastewater with high COD (Chemical Oxygen Demand) and oil content. A sedimentation tank; the sludge collecting seat is fixedly arranged at the bottom end of the sedimentation tank and is communicated with the inner cavity of the sedimentation tank; a plurality of sedimentation plates are sequentially arranged in an inner cavity of the sedimentation tank from left to right; the strip-shaped columns are fixedly arranged at the top ends of the front side and the rear side of the sedimentation tank in the left-right direction; and the dosing mechanism is arranged at the top end of the strip-shaped column. According to the high-COD and oil-content oil-producing wastewater treatment process, insoluble organic pollutants in wastewater are subjected to a coagulation reaction by adding a coagulant and a high-efficiency coagulant to form alumen ustum which is separated out from water and removed, so that the insoluble organic pollutants in the wastewater are greatly reduced while grease and suspended solids are removed, and the treatment effect of the wastewater is improved. The load of subsequent biochemical treatment facilities is reduced, and the operation cost is saved.

The invention provides a Ramelteon quick-release and slow-release dual-release preparation. The Ramelteon quick-release and slow-release dual-release preparation comprises a quick-release part and a slow-release part; and the dosage form of the Ramelteon quick-release and slow-release double-release preparation is a double-layer tablet, a granule or a capsule, wherein the quick release part comprises the following raw materials in parts by weight: 1 to 30 parts of Ramelteon, 20 to 160 parts of a first filling agent, 0.5 to 10 parts of a disintegrating agent and 0.1 to 5 parts of a first lubricating agent; the slow-release part comprises the following raw materials in parts by weight: 1 to 30 parts of Ramelteon, 20 to 160 parts of a second filling agent, 5 to 30 parts of a sustained-release material and 0.2 to 10 parts of a second lubricating agent; the slow-release material is selected from at least one of hydroxypropyl methylcellulose, polyvinylpyrrolidone, hydroxypropyl cellulose, sodium alginate, calcium alginate, guar gum and xanthan gum. The preparation has a relatively high release speed in the initial stage, and meanwhile, the action time of the medicine can be prolonged.

The invention provides an etching liquid acid concentration measuring device. The device comprises a controller, a spectrophotometer, an etching bath, a reference cell, a detector and a solution storage unit, wherein the solution storage unit is communicated with the etching bath through a first pipeline and communicated with the reference cell through a second pipeline, the solution storage unit is used for accommodating etching liquid, the reference cell is used for accommodating reference liquid, and the controller controls the spectrophotometer to illuminate the etching bath and the reference cell at the same time, controls the time, entering the etching bath and the reference cell, of the etching liquid, and also controls the acid concentration of the etching liquid in the etching bath to be different from the acid concentration of the reference liquid in the reference cell; both the etching bath and the reference cell are communicated with the detector, and the detector is used for detecting the wavelengths of light absorbed by the etching liquid in the etching bath and the reference liquid in the reference cell illuminated by the spectrophotometer and converting the wavelength into digital signals for comparison.

The invention provides a polyurethane filler as well as a preparation method and application thereof. The polyurethane filler provided by the invention comprises polyurethane foam, Na2SO3, bivalent iron salt, hydroxylamine and a cross-linking agent. The slow-release polyurethane filler provided by the invention has good overall flexibility, can be cut at will to adapt to reactors with different sizes and shapes, and can improve the starting speed of the reactor and enhance the impact resistance.

The invention discloses an efficient preparation method of fluorine [18F] safinamide and application of a PET (positron emission tomography) developer, and the method comprises the following steps: firstly, designing to prepare a precursor of the fluorine [18F] safinamide, and then realizing direct radioactive fluoro labeling on aromatic rings in the precursor through nucleophilic substitution reaction to obtain the fluorine [18F] safinamide. The precursor is Mel-SF, SPIAd-SF, SPI5-SF, Me3Sn-SF, or Bpin-SF, and the SF is SF or SF; the prepared fluorine [18F] safinamide can be used as a PET (Polyethylene Terephthalate) imaging agent for imaging a cell line capable of secreting monoamine oxidase B, can also be used for imaging living animals, can penetrate through a blood brain barrier and realize brain region imaging, can be reversibly combined with multiple target spots in vivo, can also be used for imaging animal in-vitro tissues, and can be applied to imaging of animal in-vitro tissues. The method has potential application prospects in the medical fields of medical early diagnosis, adjuvant therapy, pathogenesis research and the like.

The invention discloses an insulated gate bipolar transistor and a preparation method thereof. The preparation method comprises the following steps that: a first conductive type semiconductor layer isformed on the back surface of a substrate, and an MOS structure is formed on the front surface of the substrate; grooves which are arranged at intervals are formed on the first conductive type semiconductor layer; a first part of a second conductive type collector region is formed in the grooves; and a second part of the second conductive type collector region is formed in the first conductive type semiconductor layer and the grooves, the first part of the second conductive type collector region and the second part of the second conductive type collector region form the second conductive typecollector region. According to the insulated gate bipolar transistor and the preparation method thereof provided by the embodiments of the invention, the groove type design is added to the collectorregion of the IGBT; and the groove type structure enables the IGBT to keep an active region to have enough carrier concentration during the work of the IGBT, and reduces the carrier concentration of aterminal region, and therefore, the injection efficiency of the collector region can be optimized, the reverse bias safety working region of the device can be improved; and the groove structure is more beneficial to metal adhesion, and therefore, the metal structure of the surface of the back collector of the IGBT can be optimized.