338results about How to "Single ingredient" patented technology

The invention discloses a wet-method smoke denitration process used for recovering nitrite, comprising the steps as follows: hydrogen peroxide or ozone is taken as oxidant; the oxidant is uniformly sprayed into smoke disposed by pre-dedusting and desulfurizing so as to carry out gas oxidation reaction and lead the NO in the smoke to be oxidated as NO2; subsequently, alkali liquid is taken as absorbent so as to absorb the mixture of the oxidated NO and NO2 and generate the nitrite; the absorbent is concentrated after absorbing the NO and NO2 and cooled and crystallized; after centrifuging separation, the nitrite crystal is gained. The process of the invention can effectively remove the NOx in the smoke, gains the nitrite with high economic values at the same time, and realizes the resource utilization of denitration outgrowth.

The invention discloses a lithium-titanium oxide type lithium ion sieve absorbent and a method for preparing a precursor thereof, and relates to a method for preparing an inorganic absorbent for absorbing enriched lithium from salt lake brine, seawater and other liquid lithium resources. The method is characterized in that: titanium dioxide and lithium salt are taken as raw materials, ground by a ball grinder and dried so as to prepare a precursor Li2TiO3 of an ion sieve through a high-temperature solid-phase roasting method; and the lithium is eluted from the precursor Li2TiO3 by inorganic acid to prepare an ion sieve H2TiO3. The method has the advantage of simple technology, and the obtained ion sieve has the advantages of low solution loss and high adsorption capacity.

The invention relates to a method of preparing full-stable and cubic-phase zirconia crystal fibers, which mainly comprises the following steps: using zirconium oxychloride, acetylacetone and triethylamine as main raw material and using ethanol as diluent solvent to directly react at a temperature of 0 DEG C to 50 DEG C under a stirring condition so as to generate an organic polymer solution comprising zirconium; evaporating the ethanol and using acetone as solvent to dissolve soluble substances and filter and remove an undissolved substance of triethylamine hydrochloride; recycling the acetone, dissolving the obtained products and yttrium salt to the ethanol to prepare a spinning solution which is centrifugally flung at a high speed to obtain organic polymer fibers comprising zirconium; and carrying out heat treatment in a special atmosphere and ultra-high temperature treatment of the organic polymer fibers comprising zirconium. The invention has simple preparation technology and can recycle the solvent, and the prepared crystal fibers have single ingredients, high purity and stable high-temperature performance and can be used in a range from 1700 DEG C to 2150 DEG C for a long time.

The invention discloses a method for preparing a carbon microsphere adsorbent under catalysis of metal salt with a low-temperature hydrothermal method. The method comprises steps as follows: (1) a biomass solution with the concentration being 2wt%-20wt% and a metal salt solution with the concentration being 0.5wt%-2wt% are prepared, then mixed in the mass ratio being (2-5):1 and stirred for 5-10 min, and a reaction solution is obtained; (2) the reaction solution is transferred to a stainless steel reaction kettle, the volume of the reaction solution accounts for 60%-80% of that of the reaction kettle, the reaction solution is heated to 100-160 DEG C at a certain heating speed, reacts at the constant temperature for 8-20 hours and is naturally cooled, separated and dried in vacuum, and hydrothermal carbon microspheres are obtained; (3) the hydrothermal carbon microspheres are calcined and carbonized at the air atmosphere, and the carbon microsphere adsorbent is obtained. The preparation process of the adsorbent is simple, energy consumption is low, the reaction time is shortened to be within 24 hours, and the adsorbent has high adsorption performance for part of positive ions, particularly, uranyl ions, has excellent radioresistance, thermal stability and acid stability and can be widely used for treatment of radioactive wastewater.

The invention discloses a probiotic foodstuff and a preparation method thereof. In the fermentation process of yoghourt, a functional starter, germinated brown rice, Chinese herbal medicine extract with anti-heat-and-cold irritability and a stabilizing agent capable of effectively enhancing stability are added; temperature-varying yoghurt fermentation enables propagation of lactic acid bacteria to be maximized and anti-heat-and-cold stress capability of lactic acid bacteria to be improved; non-thermal processing technology is employed for pretreatment of yoghurt and fruit and vegetable pulp so as to prevent infection with infectious microbes in preparation process, improve juice yield of the fruit and vegetable pulp, increase the content of soluble cellulose in the fruit and vegetable pulp and prevent browning of the fruit and vegetable pulp; and a scientifically compounded cryoprotectant with good anti-refrigeration effect is added during mixing of the fruit and vegetable pulp and the yoghurt. Eventually, the prepared probiotic foodstuff has fine mouthfeel, uniform texture, stable state, natural quality, a great number of live bacteria, strong functionality and long shelf life, wherein the content of the live bacteria is 1.75 * 10<11> to 2.55 * 10<11> CFU/g, and the shelf life is 30 to 36 months at normal temperature.

The invention belongs to the field of production and preparation of inorganic functional materials, and particularly relates to a process for preparing single-phase sodalite from fly ash, which comprises the following steps: pretreating fly ash by an alkaline fusion method; proportionally adding the activated fly ash, aluminum hydroxide and sodium hydroxide solution into a polytetrafluoroethyleneinner container, evenly mixing, and carrying out hydrothermal crystallization in a sealed constant-temperature drying oven; and finally, filtering the product, washing until the product becomes neutral, and drying to obtain the single-phase sodalite material. The invention successfully synthesizes the low-cost single-phase sodalite zeolitization material by using solid waste-fly ash as the raw material for production. The process has the advantages of low cost, abundant sources of raw material, controllable product performance, no secondary pollution and the like, is simple and easy to operate, and thus, has great industrial application potential.

This invention discloses a method for increasing the service life of thermal barrier coating layer by surface modification of metal bonding layer. The method comprises: washing and sand-blasting the matrix surface, depositing a metal bonding layer of MCrAlY series alloy onto the matrix surface by supersonic flame spray or plasma spray, performing surface modification on the metal bonding layer by supersonic coolant air injection of Al2O3 particles, and depositing conventional ZrO2-Y2O3 ceramic surface layer onto the metal bonding layer by plasma spray to obtain the thermal barrier coating layer. The method utilizes supersonic coolant air injection of Al2O3 particles to change the surface grain/particle structure, surface morphology and surface stress of the metal bonding layer. The method can realize finer surface grains/particles, and more uniform composition distribution, which can improve the thermal shock resistance of the thermal barrier coating layer, and increase its service life.

The invention discloses an early strength composite admixture, which consists of the following components in parts by weight: 8-20 parts of an inorganic salt mixture, 1-8 parts of an organic salt mixture and 75-90 parts of an admixture. Due to the adoption of the early strength composite admixture, the 3h, 8h, 12h and 1d strength of concrete can be enhanced remarkably, long-term strength is not influenced basically, and the working performance and stability of concrete can be improved.

The invention discloses a freeze-dried foodstuff and a preparation method thereof. In the fermentation process of yoghourt, a functional starter, germinated brown rice, Chinese herbal medicine extract with anti-heat-and-cold irritability and a stabilizing agent capable of effectively enhancing stability are added; temperature-varying yoghurt fermentation enables propagation of lactic acid bacteria to be maximized and anti-heat-and-cold stress capability of lactic acid bacteria to be improved; non-thermal processing technology is employed for pretreatment of yoghurt and fruit paste so as to prevent infection with infectious microbes in preparation process, improve fruit juice yield, increase the content of soluble cellulose in the fruit paste and prevent browning of the fruit paste; and a scientifically compounded cryoprotectant with good anti-refrigeration effect is added during mixing of the fruit paste and the yoghurt. Eventually, the prepared freeze-dried foodstuff has fine mouthfeel, uniform texture, stable state, a great number of live bacteria, strong functionality and long shelf life, wherein the content of the live bacteria is 1.55 * 10<11> to 2.52 * 10<11> CFU/g, and the shelf life is 30 to 36 months at normal temperature.

The invention discloses a method used for chrome tanning waste water treatment and chrome recovery. The method comprises the steps of pretreatment, pH adjustment, electric flocculation treatment, aeration sedimentation treatment, sludge reaction pool treatment, electro-catalysis oxidization treatment and the like. A novel method for treating chrome-contained waste water through an electrochemical method is provided for the field of leather water treatment, a technology for recovering chrome in sludge is studied and developed, chrome resource consumption is lowered, the purposes of up-to-standard discharging of the chrome-contained waste water and recycling and reusing of chrome resources are realized, and meanwhile, the problem of after-treatment of a large amount of chrome sludge in waste water treatment is solved.

This invention discloses a multivalence hepatitis B fusion protein targeting adjuvant vaccine, a preparation method and an application thereof. Particularly, the invention discloses a quadrivalence hepatitis B fusion protein targeting adjuvant vaccine (FL-CH-HBsAg-HbsAg)2, an octivalence hepatitis B fusion protein targeting adjuvant vaccine (HBsAg-HBsAg-CH-FL, HBsAg-HBsAg-CL)2, a relevant preparation method, and an application in preparation of preventative pharmaceuticals, and in treatment and/or prevention of hepatitis B.

The invention relates to preparation and application methods of a transition-metal-supported tungsten-base catalyst. The method comprises the following steps: preparing a tungsten-base catalyst by low-temperature liquid-phase hydrothermal synthesis, and directly supporting one or more transition metals onto the support surface by sodium borohydride chemical reduction to obtain the supported tungsten-base catalyst; and uniformly mixing the tungsten-base catalyst with cellulose and water, and carrying out hydrogenation catalytic degradation in a closed high-pressure reaction kettle to prepare ethanediol. The cellulose can be catalytically converted into ethanediol in a high-efficiency high-selectivity high-yield way, and the ethanediol yield is up to 76.3%. The method has the advantages of simple technique, favorable reproducibility, mild reaction conditions, high cellulose conversion rate and high ethanediol yield; all the raw materials are inorganic compounds; and the reaction raw materials in the application direction are renewable resources. The ethanediol is an important chemical raw material.

A method for preparing nanometer vanadium/chromium carbide composite powder by reduction with a microwave method is characterized by comprising the following steps: a, taking 5.60-7.35 g of nanometer vanadium oxide, 5.40-7.10 g of nanometer chromium oxide and 5.40-6.20 g of carbonaceous reducing agent in proportion by weight, placing the materials into a ball mill, and fully mixing the materials by taking absolute ethyl alcohol or acetone as a ball-milling medium, so as to obtain a mixed material; b, placing the mixture obtained in the step a into a drying box, drying the mixture at the temperature of 100-200 DEG C for 1-3 hours, and then compressing the dried mixture into blocks for standby; and c, placing the blocks obtained in the step b into a microwave sintering furnace, performing carbonization reduction on the blocks at the temperature of 700-1000 DEG C for 5-30 minutes under the protection condition of vacuum, argon or hydrogen environment, so as to obtain the nanometer vanadium/chromium carbide composite powder with the average grain diameter of 100 nm and uniform grain fineness distribution.

The invention provides a method for preparing porous metal with mixed gas in order to solve the problems that an existing micro-nano-porous metal preparation technology mainly concentrates on the initial formation process of metal materials, the method is complex and seriously relies on a die template, and the requirements for production equipment are high. The method for preparing the porous metal includes the steps that firstly, the metal materials are cleaned with acetone firstly and then cleaned with absolute ethyl alcohol and deionized water sequentially; and secondly, the temperature of the cleaned metal is raised to 550-850 DEG C under the protection of inert gas, then the mixed gas composed of fuel gas and oxidation gas is introduced into a carrier to carry out porous processing. A porous structure is formed on the surface of and inside the metal by directly using the expansion and overflowing of H2O gas and CO2 gas formed by the fuel gas and the oxidation gas inside the metal. The method has the advantages that the technology is simple, preparation is convenient, and pollution is avoided. Secondary processing can be achieved on a prepared complex metal device, and the requirements for the equipment are low.

The invention discloses a method for improving ternary lithium battery positive-electrode material temperature resistance by evaporating aluminum fluoride. According the method, a fluidized bed serves as an evaporation device, the aluminum fluoride is sublimated, nano-scale nickel and cobalt lithium manganate ternary materials and the aluminum fluoride are evaporated in a contacting and suspending manner in the sublimating atmosphere of the aluminum fluoride, an ultrathin aluminum fluoride protection film uniformly wraps the surfaces of micro-particles of the nano-scale nickel and cobalt lithium manganate ternary materials after the materials are cooled, and the high-temperature resistance of nickel and cobalt lithium manganate is improved to 300 DEG C by wrapping the aluminum fluoride. By the aid of a pure physical coating mode, the method overcomes the technical shortcomings that a coating layer acquired by chemical coating of the aluminum fluoride is nonuniform, battery efficiency is affected, effect processing period is long, cost is high, pollution exists and the like in the prior art. The method is good in coating effect and simple in preparation process and can achieve large-scale industrial production modes.