336results about How to "Wide concentration range" patented technology

The invention discloses a catalyst for hydrolyzing active carbon-based COS under the condition of low temperature and a preparation method thereof, wherein a carrier of the catalyst is active carbon, and active compositions of the catalyst are alkali materials and metal oxide. The catalyst can remove COS in air at a low temperature (between 30 and 100 DEG C) and remove H2S generated by hydrolysis together. The preparation method comprises the following steps: firstly, using running water and distilled water to wash the active carbon, and drying the active carbon for 2 to 4 hours at a temperature of between 110 and 180 DEG C, wherein the active carbon can be coal and coconut husks; secondly, using a 1 mol/L KOH solution to boil the washed active carbon for 1.5 to 2 hours, performing modification treatment, and using distilled water to wash the solution until the pH value is approximately 6.0; thirdly, selecting one or more metallic salt solutions to soak the active carbon, performing modification treatment, and performing ultrasonic soakage for 0.5 to 1 hour, wherein the content of a soaking liquid is 10 to 90 percent of the mass ratio of the active carbon, and the volume of the soaking liquid is as follows: 20 milliliters of the soaking liquid is added into 10 grams of the catalyst; fourthly, drying the soaked active carbon for 2 to 6 hours in a 120 DEG C constant-temperature drying cabinet, and activating the catalyst for 2 to 4 hours under the protection of 300 to 600 DEG C N2; and fifthly, performing ultrasonic soakage on the activated catalyst in the fourth step in an alkali solution for 0.5 to 1 hour.

The invention provides an active carbon based catalyst for hydrolyzing and catalyzing carbonyl sulfur in low temperature, which is characterized in that the catalyst takes active carbon as a carrier and is prepared by the following method: washing the active carbon, drying the active carbon for 2-4 hours under 100-140 DEG C; impregnating the active carbon in the (A) step for 6-12 hours with the impregnation liquid of alkaline substances or metal oxides or organic alcohol amine, wherein, the mass content of the alkaline substances or the metal oxides or the organic alcohol amine accounts for 5-30 percent of that of the active carbon; drying the impregnated active carbon for 2-6 hours under the constant temperature of 100-140 DEG C and then activating the active carbon for 2-4 hours under the temperature of 300-500 DEG C and the protection of N2. The catalyst can be used for catalyzing and hydrolyzing COS and removing H2S; furthermore, the catalyst can remove the COS in the gas under the temperature of 30-100 DEG C, ensure the conversion rate of the COS to be larger than 90 percent and remove the H2S generated in hydrolysis at the same time. The COS concentration which is between 100-1500ppm has a wide adaptive range, high desulfurization accuracy and higher breakthrough sulfur capacity.

The invention relates to an oxidation-resistant disperse dye composition and preparation and an application thereof. The oxidation-resistant disperse dye composition comprises the combination of any 2-4 of a yellow dye shown as a general formula (I), an orange dye shown as a general formula (II), a blue dye shown as a general formula (III) and a red dye shown as a general formula (IV), not more than two types of dyes are shown as each general formula; and the oxidation-resistant disperse dye composition is applied to pre-treatment dyeing of dacron or polyester-cotton blended fabrics. The disperse dye composition can be used for dyeing polyesters and blended fabrics thereof under the strong oxidative condition that the mass concentration of H2O2 is 0.1-0.5 percent, and an obtained fabric has the advantages of stable chromatic light, bright color, neat cloth cover and excellent fabric style; and according to the disperse dye composition, pretreatment and one-bath and one-step dyeing of polyester fiber or blended fabrics thereof are realized, efficiency is increased, production cost is reduced, and dyeing waste water is reduced.

The invention discloses a gas particle concentration measurement method and a gas particle concentration measurement device on basis of broadband linear frequency modulation ultrasound. The measurement method includes the following steps: constructing a measurement signal by using a linear frequency modulation (LFM) signal, performing digital-to-analogue conversion to the measurement signal and transmitting the converted measurement signal from a transmitting ultrasonic transducer array; detecting an ultrasonic signal by a receiving ultrasonic transducer array, so as to obtain a received signal; performing analog-to-digital conversion to the received signal, and further performing spectrum estimation to the received signal, so as to obtain an attenuation spectrum of the received signal; and moreover, analyzing the obtained attenuation spectrum, determining the linearity of corresponding particles on basis of the frequency, and determining the concentration of corresponding linear particles as per the frequency spectrum amplitude on basis of a mathematical model or an empirical formula. The device for realizing the method includes an operating module, a processing module, a transmitting/receiving module, an outputting module and a measurement cavity. The method and the device, disclosed by the invention, have the advantages of wide application range, high measurement accuracy, simple device, low cost, convenience in use and the like.

The invention discloses an optical fiber refractive index and temperature sensor and a measurement method thereof. The optical fiber refractive index and temperature sensor comprises a broadband light source (1), an optical fiber sensing head (2), a spectrometer (3) and a computer (4), wherein the broadband light source (1) is connected to a first input port of the optical fiber sensing head (2) through an optical fiber; a first output port of the optical fiber sensing head (2) is connected with the spectrometer through an optical fiber. According to the measurement method, two light beams split in a Mach-Zehnder interferometer interfere with each other, the movements of the valley value wavelength and the Bragg wavelength of an interference fringe change with the refractive index or the temperature of a material to be measured where the optical fiber sensing head is positioned, the movement ranges of the valley value wavelength and the Bragg wavelength of the interference fringe are measured through the spectrometer, and the refractive index and the temperature of the material to be measured are obtained through calculation of the computer. The optical fiber refractive index and temperature sensor is capable of measuring the refractive index and the temperature in high-precision and real-time ways at the same time and is simple in structure and convenient to operate.

The invention discloses disposing method of difficult biochemical decomposable organic polluted waste water, which is characterized by the following: oxidizing to decompose organic pollution in the quadravalent manganese compounds; reducing to generate bivalent manganese compounds; producing carbon dioxide and water; dehydrating bivalent manganese ion; sedimenting; oxidizing to generate quadravalent manganese compounds under weak caustic solution; recycling the waste water in the disposing course.

The present invention relates to electric and biological processing apparatus and method for waste water containing heavy meal ion and non-degradable organism. The apparatus includes electric and biological reaction tower with top air outlet, bottom air distributor, liquid inlet in the upper part, liquid outlet in the lower part and connected with precipitator, tower wall and tower core constituting one electrode pair and insulating layer outside the tower wall. The present invention has the advantages of multi-dimensional electrode reinforced electric field to promote the electrochemical reaction and directional motion of heavy metal ion, and catalytic electrode/efficient functional microbe group with coupled reaction to degrade organic waste water. The present invention can treat waste water containing heavy meal ion and non-degradable organism effectively.

The invention discloses a self-circulation anaerobic reactor. The self-circulation anaerobic reactor comprises a tank body, a water distributor, a sewage return pipe, a marsh gas flow guide device, an isolating inner cylinder, a three-phase separator and the like. The tank body is internally divided into several regions which are a mixing region, a main reaction region, a main marsh gas separating region, an auxiliary reaction region and a solid, liquid and gas three-phase separating region (containing a setting region) through the devices. Inner circulation is automatically formed by sewage in the regions under the raising action of marsh gas. As inner circulation is formed, rising flow speed of the main reaction region is increased, the contact area between organic matter in the main reaction region and anaerobic biological bacteria is increased, and water quality purification speed is increased. The concentration of input water is reduced by the self circulation, the concentration gradient of organic acid in a reactor is reduced, the living environment of the anaerobic biological bacteria is improved, and the degradation rate of the anaerobic biological bacteria is increased. As the self-circulation reactor is ingenious in structure, the self-circulation amount can be several times that of an existing anaerobic reactor. Output water is high and stable in quality, the requirement for designing anaerobic water output can be met without multi-level arrangement.

The invention discloses a Ni/NiF2 reference electrode used for molten fluoride, and a making method thereof. The Ni/NiF2 reference electrode comprises a nickel wire electrode, an insulation sleeve and a sealing plug used for sealing the insulation sleeve; the bottom of the insulation sleeve is provided with a reference salt; the nickel wire electrode is fixed to the sealing plug, and one end of the nickel wire electrode traverses through the sealing plug, extends into the insulation sleeve and is immersed in the reference salt; the outer sidewall of the insulation sleeve is provided with an arc-shaped groove, and the bottom of the arc-shaped groove is provided with a through hole; the surface roughness Ra of the arc-shaped groove is less than 12.5[mu]m, and the radius of curvature of the arc-shaped groove is not less than 2mm; and the diameter of the through hole is 0.05-0.3mm, and the depth of the through hole is 0.3-2.0mm. The Ni/NiF2 reference electrode has the advantages of short ion conduction time, and good reappearance and stability of the electrode potential.

The invention discloses a preparation method of a photonic crystal with an inverse opal structure, and belongs to the technical field of the photonic crystal with the inverse opal structure. The preparation method comprises the following technological steps of: firstly adding polymeric microspheres to colloidal sol in proportions, and then dispersing the mixture for 10-60 minutes by using ultrasonic waves so as to form a uniform stable suspension emulsion; transferring the prepared suspended emulsion to a glass container, and vertically placing a clean substrate in the glass container filled with the suspended emulsion; then slantwise placing the glass container on a heating platform, and heating so as to volatilize a solvent; utilizing a binary synergistic effect for ensuring that polymeric microspheres and the colloidal sol grow on the substrate in a self-organizing manner to form a polymer; after ending growth, taking out a sample, and heating in air under an appropriate temperature condition so as to decompose and volatize the polymer; cooling and taking the sample to obtain the photonic crystal with the inverse opal structure, which has good degree of crystallinity and no defects and is large in area.

The invention discloses a rod-shaped nano iron oxide electrode material, and a preparation method thereof. The preparation method comprises the steps of carrying out a hydrothermal reaction by using FeCl3.6H2O, ammonium dihydrogen phosphate and water as raw materials; and washing produced precipitate to obtain the rod-shaped nano iron oxide. The nano iron oxide is in a rod shape, with an average diameter being 60-80 nm, length being 250-300 nanometers, purity higher than 99.9% and crystal phase being alpha-Fe2O3. The rod-shaped nano iron oxide electrode material can be used as both a positive electrode active material and a negative electrode active material for a lithium ion battery. Raw materials used in the preparation method are easily available, nontoxic and pollution-free to environment. A preparation process is simple; operation is convenient; and the preparation method is suitable for large-scale production. By using the rod-shaped nano iron oxide electrode material as the positive and negative electrode active materials for the lithium ion battery, cost is low; electrochemical performance is excellent; chemical stability of the electrode material is stable; specific capacity is high; and polarization of a charge and discharge platform is small.

The invention discloses in-situ adsorption-microelectrolysis-catalytic oxidation sewage treatment equipment and method, belonging to the technical field of sewage treatment in environment engineering. The in-situ adsorption-microelectrolysis-catalytic oxidation sewage treatment equipment is characterized in that adsorption equipment, electrolysis equipment and catalytic oxidation equipment are integrated so as to gather enable pollutants to be gathered from a low-concentration water phase onto an adsorbent; by using the favorable electric conductivity, the adsorbent is used as a complexly polarized three-dimensional electrode to form countless micro electrolytic baths, so that the organic pollutants are electrolyzed while organic matters are adsorbed, and adsorption active sites are continuously regenerated; and by utilizing an electric insulation material, the three-dimensional electrode is complexly polarized and has a high-class oxidation catalyst function at the same time, so that a gas oxidant dissolved in water and an oxidant generated by side reaction of the electrode form a high-class oxidant to efficiently remove the organic pollutants. According to the equipment and the method, the problems of slow reaction speed, low space-time efficiency, low current efficiency and low pollutant degradation efficiency in the conventional electrolytic reactors are solved, and an excellent market prospect is provided.

The present invention relates to a drying separation equipment, containing tower body, driving device, start-rotating needle wheel, granule sorting device, separating needle wheel and air power separator. It is characterized by that it mainly utilizes the rotor of start-rotating needle wheel to disperse material and start rotational flow, and utilizes the rotational flow to enhance heat condution of material and gas flow, and can force the dried material to make regular centrifugal movement to clean tower wall and eliminate sticky wall phenomenon. The sorting device can be used for collecting the products with different grain sizes or cooling, and the separating needle wheel can raise separation effect. Said invention can implement air flow circularting drying and can raise utilization rate of heat energy.

The invention discloses a method for continuously preparing 1, 5-pentanediol from tetrahydrofurfuryl alcohol. According to the method, platinum loaded tungsten-zirconium composite oxide is taken as a catalyst, and a 10-90% solution tetrahydrofurfuryl alcohol aqueous 10-90% solution and hydrogen are simultaneously and continuously introduced into a fixed bed reactor for reaction so as to generate1, 5-pentanediol under the reaction conditions that the temperature is 100-150 DEG C, the pressure is 1-5 MPa, the mass flow rate of the tetrahydrofurfuryl alcohol is 0.05-1 A/H (A is the mass of the catalyst in the reactor), and the mol ratio of hydrogen to tetrahydrofurfuryl alcohol is 10-100. The mol ratio of various metal elements in the catalyst is Pt: W: Zr=(0.05-0.5): 1: (5-30). The method is moderate in reaction condition, high in catalytic activity, good in product selectivity, simple in process and continuous in production; and the raw materials are from biomass, thereby meeting the green chemical development direction.

The invention discloses a microwave catalyst for degrading organic wastewater and a catalytic oxidation degradation method thereof. The catalyst is of a porous structure and can be used for absorbing microwave, wherein in the adsorption of microwave, oxygen or air is introduced into the catalyst in the presence of water molecules so as to generate a large quantity of OH free radicals under microwave irradiation. By adopting the technical scheme, the microwave catalyst greatly improves the degradation efficiency, greatly shortens the processing time, is easy and feasible to operate, low in investment and operation costs, small in occupying area, complete in degradation, wide in concentration range of degrading the organic wastewater, easy for industrial production and suitable for treatment of organic wastewater in the industries of printing and dyeing, paper making, chemical industry, pharmacy and the like, and can perform continuous scale treatment; and moreover, the secondary pollution is avoided.

The invention relates to a catalyst for selective dehydration and conversion of natural glycerin into acrolein and the corresponding reaction process. The catalyst is composed of an H-ZSM-5 molecular sieve and 0.05%-7% of an active metal component, or the H-ZSM-5 molecular sieve, 5%-30% of amorphous silicon aluminum gel and 0.05%-7% of the active metal component. The usage of the catalyst of the invention can realize the conversion of the glycerin into the acrolein with high conversion rate and high selectivity under the conditions of normal pressure, reaction temperature of 200 to 400 DEG C and liquid-space velocity (LHSV) of 0.01 to 0.60h, glycerin water solution with 10 to 60 percent is taken as the reaction raw material, and the reaction is directly carried out in a fixed bed flow reactor without the steps of preheating and gasification. The conversion rate of the glycerin is 100% and the selectivity of the acrolein is 75.2mol% under the optimized conditions. The catalyst and the reaction process of the invention are significantly characterized in that: the catalyst has high strength and difficult argillization; the activity and the selectivity of the catalyst are high; the concentration of the reaction raw material liquid and the range of the reaction liquid-space velocity are wide, the reaction temperature is lower, and the reaction process route is simple.

The invention relates to a reaction technology for manufacturing hydroxyacetone through selective dehydration of natural glycerin, and a corresponding catalyst. The catalyst is composed of low-activity carriers such as SiO2, etc. and active metal components of 20 to 90wt percent, and is prepared by adopting an insuccation loading method. The active metal components which are used are IB group elements, or the combination of IB and VIB group elements, or the combination of IB, VIB and light rare earth elements. The reaction for manufacturing the hydroxyacetone through selective dehydration of the natural glycerin is performed in a fixed bed flowing-type reactor; the glycerin conversion rate can reach up to 99.89 percent, and the molar selectivity of the hydroxyacetone can reach up to 89.74 percent under the conditions that the material concentration can reach 10 to 100 percent, the normal atmosphere is provided, the temperature ranges from 200 to 400 DEG C, and the liquid hourly space velocity (LHSV) satisfies 0.01 to 0.60h<-1>. The catalyst has simple preparation technology and low price, and the concentration of the reaction material that is glycerin water solution and the liquid hourly space velocity has wide range.

The invention provides a process for preparing sulphuric acid by the step reaction of sulfureted hydrogen. Raw material of sulfureted hydrogen and part of air are burnt incompletely at the front part of an air cooled reactor through a burner, generated mixing gas and cooled air entering along the internal wall of the reactor are burnt further, the sulfureted hydrogen is completely converted into sulfur dioxide; the sulfur dioxide passes through a waste heat boiler to generate high pressure steam for recycling the heat quantity and enters a convertor; the sulfur dioxide is catalyzed and oxidized into sulfur trioxide in a converter by adopting the way of subsection air sharp quenching; and the sulfur trioxide gas is absorbed into a concentration tower, higher than 97 percent sulphuric acid is obtained at the bottom of the tower and the tail gas at the top of the tower is purified and discharged.

The invention provides a preparation method of a coated catalyst. The catalyst comprises a molybdenum-based compound core structure and an outer coated silicon dioxide shell structure, wherein the molybdenum-based compound core structure is one or more of molybdenum disulfide, molybdenum carbide and molybdenum nitride. The method comprises the following steps: step A, acquiring a powdery molybdenum-based compound core structure; step B, uniformly mixing the powdery molybdenum-based compound with a dispersing agent, adding alkali for adjusting the pH value, a surfactant and ethyl orthosilicate,carrying out solid-liquid separation after reaction, washing and drying the obtained solid to obtain a precursor of the coated catalyst, and roasting the precursor at the temperature of 600-1000 DEGC to obtain the coated catalyst, wherein the dispersing agent comprises one or more of deionized water, ethanol and polyvinylpyrrolidone. The preparation process is simple and convenient, raw materials are easy to obtain, the microwave catalytic hydrogen sulfide direct decomposition activity is high, and the stability is good.

This invention discloses a method for preparing stable carbon nanotube (CNT) suspension by using tannic acid. The method comprises: (1) affing distilled water into tannic acid to obtain 5-500 mg/L tannic acid aqueous solution; (2) adding CNT (inner diameters less than or equal to 100 nm) to obtain 10-1000 mg/L CNT solution; (3) ultrasonicating in an ultrasonic cleaner for 30-60 min; (4) standing for more than 24 h, transferring the CNT suspension into another container. The dispersant in this invention, tannic acid, is a nontoxic and water-soluble natural product, and has high suspension ability to CNT. The obtained CNT suspension is stable, and the method is suitable for a wide range of conditions.

The invention provides a Castanea henryi high-yielding regulator and application thereof. The Castanea henryi high-yielding regulator is composed of a Castanea henryi high-yielding regulator 1 and a Castanea henryi high-yielding regulator 2, wherein the Castanea henryi high-yielding regulator 1 contains the following components in parts by weight: 10-150 parts of potassium dihydrogen phosphate, 20-150 parts of calcium chloride, 50-100 parts of boric acid, 50-100 parts of sucrose, 0.5-3 parts of 2,4-dichlorphenoxyacetic acid, 20-70 parts of gibberellin and 1-4 parts of indolebutyric acid; and the Castanea henryi high-yielding regulator 2 contains the following components in parts by weight: 100-300 parts of urea, 10-70 parts of ammonium phosphate, 20-50 parts of potassium sulfate, 30-70 parts of magnesium chloride, 50-100 parts of calcium chloride, 50-100 parts of manganese chloride, 10-30 parts of zinc sulfate and 50-200 parts of ferrous sulfate. The Castanea henryi high-yielding regulator provided by the invention can obviously enhance the yield of the Castanea henryi, and ensure the high and stable yield of the Castanea henryi.