55results about How to "Change interaction" patented technology

The invention disclose a modified sand body, which is formed by the mixing of solution and sand, wherein the solution with cohesiveness and adhesion is formed by dissolving water-soluble solid state organic substance in water. According to the invention, after the water is evaporated, the water-soluble solid state organic substance can bond sand particles, and dissolve in water again to form the solution with the cohesiveness and the adhesion to bond the sand particles; the modified sand body allows a common sand body to be in 'pedogenesis', changes the interaction relation between sand body particles, and forms a particle pore structure with binding force (cohesive force); when the modified sand body is in the use process, the substance is difficult to run off due to the characteristics of the cohesiveness and the adhesion; the sand body is allowed to have same properties of stabilizing and storing moisture and nutrient as the properties of the soil, so as to be able to provide strong conditions for the growing of plants, and be an ideal measure for the governing of deserts; meanwhile, the modified sand body can also be taken as a means to utilize sand resources of a sand beach and the like to conduct plant planting.

The invention relates to a preparation method of a Co based Fischer-Tropsch synthesis catalyst, which comprises the following steps of: firstly carrying out surface modification on a carrier made of silica gel; and then loading metallic aids and an active component Co by a immersion method, wherein in the surface modification method of the silicon gel, immersion treatment with a buffer solution containing ammonium salt is adopted. When reaching the same synthesis gas conversion rate, the Fischer-Tropsch synthesis catalyst prepared by the method requires obviously lower reaction temperature compared with the traditional catalyst, thereby effectively prolonging the service life of the catalyst.

The invention provides a heavy oil hydrogenation catalyst and a preparation method thereof. The preparation method comprises the following steps: introducing a phosphorus source in the preparation process of a Y molecular sieve to obtain a phosphorus-containing NaY molecular sieve; converting the phosphorus-containing NaY molecular sieve into a phosphorus-containing hydrogen-type Y molecular sieve; preparing a solution from a titanium precursor and an aluminum precursor; adding the phosphorus-containing hydrogen-type Y molecular sieve, and hydrolyzing the solution to obtain a micro-pore/meso-pore oxide composite carrier; adding cobalt salt or nickel salt into the solution for preparing the micro-pore/meso-pore oxide composite carrier, and hydrolyzing the solution to obtain a metal-modified micro-pore/meso-pore oxide composite carrier; dropwise adding a solution of active components of nickel-tungsten or nickel-molybdenum into the metal-modified micro-pore/meso-pore oxide composite carrier; and immersing, drying and roasting to obtain the heavy oil hydrogenation catalyst. The catalyst provided by the invention can meet requirements on diffusion, hydrogenolysis and hydrogenation reaction of heavy oil macro-molecules, and is excellent in hydrogenation-denitrification activity on heavy oil.

The invention provides a sand fixing agent as well as a preparation method, a use method and application thereof, and relates to the technical field of environmental engineering. The sand fixing agentcomprises the following components: heteropolysaccharide and cellulose derivatives; and the mass ratio of the heteropolysaccharide to the cellulose derivatives is (5-15):(0.5-5). The sand fixing agent relieves the technical problem in the prior art of lack of a solid fixing agent which has good water-retaining effect, can maintain land fertility, guarantees that sandy soil in the land is not stuck into blocks after application, can be degreed in the natural world and avoids environmental pollution. The invention also provides a preparation method of the sand fixing agent. In addition, the invention also provides a use method of the sand fixing agent. According to the sand fixing agent, the sand fixing agent prepared by the preparation method of the sand fixing agent as well as the use method of the sand fixing agent, the sand fixing agent can be applied in the fields of sanded land agricultural planting, forestry wind prevention and sand fixation as well as sand desertification governance.

The invention discloses a propane dehydrogenation catalyst and a preparation method thereof. The propane dehydrogenation catalyst adopts CaO-Al2O3 composite oxide balls as a carrier, adopts metal Pt as an active component, and adopts Sn and Bi as additives; by adoption of the mass of the catalyst as a reference, the content of the metal Pt is 0.1-1.0wt%, the content of the Sn is 0.1-2.0wt%, the content of the Bi is 0.1-1.0wt%, the content of CaO is 1.0-5.0wt% and the rest is Al2O3. The propane dehydrogenation catalyst and the preparation method disclosed by the invention have the beneficial effects that the catalyst is prepared by adopting a coprecipitation process and can ensure heat stability and enough specific surface area and pore volume of catalyst carriers; the reaction property andanti-carbon-deposition capability of the catalyst are excellent; the dehydrogenation activity of the catalyst is very high under a high-temperature condition, the propylene selectivity can reach 90%or more, and the stability is good.

The invention discloses a wingtip noise control and a device. The method comprises the following steps that: (1) a flow control device is installed at a wingtip of a wing or a wing flap and other elevating force sides of an aircraft; (2) when the aircraft flies at high incidence and takes off or lands, the flow control device is utilized to change or weaken a large-scale unsteady wingtip vortex structure which is generated due to the differential pressure between the upper and the lower surfaces of the elevating force side through adopting a jet flow mode; during a cruising period, the flow control device does not work; and the nozzle of the flow control device adopts a sawtooth structure, the included angle of sawtooth side lines is 60-130 degrees, the sawtooth height is 2-5cm, and the sawtooth length is 0.4-0.6 time that of the chord length.

The invention relates to a production method of vinyl acetate, which comprises a vinyl acetate synthesis process, a vinyl acetate refining process and a vinyl acetate and ethyl acetate separation process. The device comprises an acetic acid evaporator, an oxygen mixer, a vinyl acetate synthesis reactor, a first gas separation tower, a second gas separation tower, a degassing tank, a water washingtower, an absorption tower, a desorption tower, an ethylene recovery tower, a recycle gas compressor and a recovery gas compressor, and the vinyl acetate refining process comprises an acetic acid tower, a crude VAC tower, a refined VAC tower, an aldehyde ester concentration tower, an acetaldehyde tower, a dehydration tower, a water phase receiving tank, an extractive distillation tower and an acetic ether tower. In the separation process of vinyl acetate and ethyl acetate, an extractive distillation process taking acetic acid as an extracting agent is adopted. According to the method, acetic acid is adopted as an extracting agent, the content of vinyl acetate in the stream without the ethyl acetate impurities is reduced from 90% or above to 5% or below, the adopted extracting agent is acetic acid carried in the feeding stream, and the process greatly reduces the operation cost of the device.

The invention discloses an anti-fouling hollow fiber membrane and a preparation method of the anti-pollution hollow fiber membrane, and provides a hollow fiber membrane capable of resisting fouling of colloidal substances and protein, and the preparation method of the hollow fiber membrane. The preparation method comprises the steps of fully mixing 1-3% of sodium polyacrylate and 3-5% of water, then fully mixing 15-20% of a polymer, 63-65% of a film formation solvent and 10-15% of a film formation additive with the above mixture, removing air bubbles to obtain casting film liquid, extruding the casting film liquid by a spinning nozzle, then enabling the casting film liquid to enter a coagulating bath at 60-80 DEG C, drying at 80-100 DEG C after coagulating for certain time, so as to obtain the anti-fouling hollow fiber membrane, wherein the coagulating bath is aqueous solution containing sodium polyacrylate cross-linking agents. The hollow fiber membrane can effectively reduce nonspecific binding of membrane surface and pollutants such as protein and colloid through a hydrophobic bond, and reduces the membrane surface adsorption, so that the membrane flux is relatively stable and the attenuation rate is reduced.

The invention provides a method for preparing amyl alcohol from 2-methylfuran at room temperature by adopting a supported platinum-based catalyst. Influences of various catalyst carriers, active metals, metal loading capacity and reaction conditions (solvents, time, pressure and the like) are investigated. The acid treatment time of a 5 wt% Pt/MWNT catalyst on MWNT is 4 hours, the catalyst shows excellent activity and selectivity under the H2 pressure of 1 MPa and at the ultralow temperature of 25 DEG C, the 2-MF conversion rate is 100%, and the pentanol (POLs) yield is 53%. A brand new route is provided for synthesis of pentanol, and compared with a traditional synthesis process route, the process route is simple in preparation process, milder in reaction condition, capable of greatly reducing energy consumption and more environmentally friendly. The Pt/MWNT catalyst provided by the invention has good reusability, and shows wide potential in industrial application.

The invention discloses modified sandy soil. The modified sandy soil is formed by stirring and mixing a solution having a caking property and adhesivity and sand soil, wherein the solution is formed by dissolving water-soluble solid organic matters in water. After the water is evaporated, the water-soluble solid organic matters can conglutinate grains of the sand soil, and when the solid organic matters meet the water, the solid organic matters can again dissolve in the water to form the solution having the caking property and adhesivity so as to conglutinate the grains of the sand soil. The modified sand soil can make general sand soil soil-like, interaction relationship among the grains of the sand soil can be fundamentally changed, and a grain-pore structure having bonding force (cohesive force) is formed. In the course of use of the modified sand soil, matters are hard to lose due to the characteristics of the caking property and adhesivity. The modified sand soil has soil-like stability and the water and nutrient storing properties, can provide solid conditions for plant growth, and is an ideal control measure for the sand soil. At the same time, the modified sand soil can be used as a means of utilization of sand resources such as sand beaches and the like for plant plantation.

The invention discloses a supported catalyst. The supported catalyst comprises an active component and a carrier; the active component comprises an active metal element, and the active metal element is selected from at least one of noble metal elements; the carrier comprises a metal oxide carrier subjected to reduction treatment; the metal oxide carrier comprises a carrier metal element; and the carrier metal element comprises at least one metal element which is subjected to reduction treatment and has a variable chemical valence. The prepared catalyst is suitable for the catalytic combustionprocess of CH4, CO and various volatile organic compounds (VOCs); and compared with supported catalysts prepared through a traditional loading method, the supported catalyst of the invention has highactivity and good stability, and reduces the use amount of the noble metal.

The invention discloses a lactone aromatic derivative containing a liquid crystal element, a preparation method thereof, a side chain type liquid crystal polymer prepared by adopting the lactone aromatic derivative containing the liquid crystal element as a polymerization monomer, a preparation method of the side chain type liquid crystal polymer and application of the side chain type liquid crystal polymer. The lactone derivative containing the liquid crystal element is prepared by adopting an organic synthesis method firstly, and then the side chain type liquid crystal polymer is prepared byadopting a ring-opening polymerization method. Reaction steps are simple, the reaction conditions are mild, and the polymer with the specified molecular weight can be synthesized by controlling the feeding ratio of an initiator to the polymerization monomer. The prepared side chain type liquid crystal polymer meets the processing requirements of conventional methods such as injection molding, mould pressing, extrusion and coating, and can be used in the fields of display, optical recording, chromatographic separation, phase change energy storage, biological tissue recovery and the like.

The invention discloses a method for governing gobi by utilizing modified sand. The modified sand is paved on the surface of the gobi to be governed, and is formed by dissolving a water-soluble solid organic matter in water to form a cohesive and adhesive solution, and mixing the cohesive and adhesive solution with sand; after moisture evaporates, the water-soluble solid organic matter can bond sand, and can be dissolved in water again after meeting water to form the cohesive and adhesive solution to bond sand. According to the invention, common sand can serve as soil; the interaction among sand grains is changed fundamentally; a particle pore structure with binding force (sticking force) is formed; after repeated evaporation and wetting, materials cannot run off easily due to the cohesive and adhesive properties, and the modified sand can be as stable as soil, and can store water and nutrients as soil. Therefore, the method provides a solid condition for tree growth, and is an ideal gobi governing measure.

The invention relates to a one-step and two-step hydrogenolysis debenzylation catalyst for a key intermediate hexabenzylhexaazaisowurtzitane (HBIW) for synthesizing a high-energy density material hexanitrohexaazaisowurtzitane (CL-20) and preparation of the catalyst. The preparation method comprises the following steps: adopting strontium titanate as a carrier, and loading noble metal palladium with the palladium loading amount of 0.1-10% (mass percent). The catalyst provided by the invention has the characteristics of low usage amount of noble metal, high activity, high selectivity, good cycle stability and the like, adopts a novel carrier, not only improves the dispersity of noble metal palladium, but also improves the cycle stability of the catalyst, and has the advantages of easily available raw materials, simple process and good application prospect.

A novel blood rheology quality control composition comprising ester compound is composed of 60-99.99 weight percent of first component and 0.01-40 weight percent of second component. The first component is blood plasma or blood serum, the second component is ester compound, the two components constitute non-Newtonian fluid, and the expression viscosity is directly proportional to the shear rate.

The invention discloses an experimental device for researching the migration law of pollutants under the interaction of a river and underground water, and relates to the technical field of research onthe migration law of pollutants. The experimental device comprises a simulation water tank used for simulating filling of an aquifer and an aeration zone; a movable water tank used for controlling aleft water head of the simulation water tank; a fixed water tank used for controlling a right water head of the simulation water tank; and a simulated riverbed arranged in the upper groove of the simulated water tank. The experimental device has the beneficial effects that the quartz sand with proper particle size after acid washing and alkali washing is used for simulating the water-containing layer, and the water head difference between the fixed water tank and the movable water tank on the two sides is adjusted by simulating the arrangement of a riverbed so as to simulate the precipitation,so that the underground water flow field is changed; different supply relations between underground water and surface water are changed by changing the water level of the simulation water tank through the water pump, so that an underground water flow field is influenced. The experimental device is reasonable in design and simple to operate, and has the characteristics of high repeatability and operability.