20results about How to "Reduce poison" patented technology

The application provides a method for inducing poly-podophylli rhizoma by using clump buds, comprising the following steps: S1, cutting stem segments from a podophylli rhizoma mother plant, soaking and cleaning to obtain explants; S2, disinfecting and cleaning the explants, inoculating into a clump bud induction medium to obtain podophylli rhizoma clump buds; S3, inoculating the clump buds into doubling liquid I, washing with a liquid clump bud induction medium after culture, and then transferring into doubling liquid II; S4, taking out the clump buds, cleaning, inoculating into a clump bud induction medium, and then inoculating into a bud proliferation medium; S5, waiting until 1-2 cm, screening out potential mutant strains through phenotypes, inoculating into the bud proliferation medium for subculture, and obtaining mutant plants; and S6, rooting culture of the mutant plants, and after root systems grow, planting and raising seedlings, and then poly-podophylli rhizoma plants are obtained. In the research, suitable concentration of colchicine is used for induction treatment twice, and through stage concentration switching and intermittent recovery strategies, the poly-ploid induction efficiency and explant survival are effectively considered.

The application belongs to the technical field of carbonyl sulfur hydrolysis catalysts, and discloses a high-efficiency sulfur-resistant catalyst for carbonyl sulfur hydrolysis, a preparation method and application thereof.The preparation method comprises the following steps: (1) preparing a porous ceramic carrier containing alumina, titanium dioxide and zirconium dioxide; (2) in-situ growing a metal organic framework material containing lanthanum, bismuth and cerium on the surface of the porous ceramic carrier by using a solvothermal method; (3) performing a calcination treatment on the porous ceramic carrier loaded with the metal organic framework material in an oxygen-containing atmosphere to obtain a catalyst precursor; and (4) performing a reducing gas plasma bombardment treatment on the catalyst precursor to obtain the high-efficiency sulfur-resistant catalyst.The high-efficiency sulfur-resistant catalyst has high-efficiency low-temperature activity, excellent sulfur resistance and long service life.

Embodiments of the present disclosure disclose air-nitrogen separation methods and systems. One embodiment of the method includes: controlling an air compression purification module to compress and purify air; controlling a membrane pre-separation assembly to preliminarily separate the purified compressed air; in response to a nitrogen purity being greater than or equal to a preset target nitrogen purity threshold, controlling a multi-stage separation and purification module to output nitrogen-rich gas; in response to the nitrogen purity being less than the preset target nitrogen purity threshold, controlling a deep purification assembly to perform deep purification processing on the nitrogen-rich gas; in response to the nitrogen purity being greater than or equal to the preset target nitrogen purity threshold, controlling the multi-stage separation and purification module to output deep-purified nitrogen gas; in response to the nitrogen purity being less than the preset target nitrogen purity threshold, controlling a precision separation assembly to perform precision separation processing on the deep-purified nitrogen gas, and controlling the multi-stage separation and purification module to output precision-separated nitrogen gas. The embodiment can meet the demand for nitrogen purity and reduce energy consumption.

This invention is a divisional application of Chinese invention patent application No. 202310608706.5, filed on May 28, 2023, entitled "Slow-Release Hydrogen Production Material Containing Nano-Silicon and Its Application in Aquatic Ecosystem Restoration". This invention discloses a slow-release hydrogen production material containing nano-silicon and its preparation method, belonging to the field of environmental protection technology. The invention involves sterilizing a 2-5% sodium alginate solution, cooling it to room temperature, adding 0.3-0.5% wt of nano-silicon to the sodium alginate solution, and stirring at 500-600 r / min at room temperature for 30-60 min to obtain a nano-silicon sodium alginate solution. The prepared nano-silicon sodium alginate solution is then added dropwise at a volume ratio of (1-5):1 to a 2-5% CaCl2 solution at a rate of 1 drop / second, and allowed to stand for 5-10 min to obtain the final product. The layered structure of this material allows the nano-silicon material to be uniformly distributed and stably produce hydrogen within the sphere.

The invention relates to the technical field of electrocatalysis, and discloses a hydroxide anode for preparing carbon monoxide through electrochemical reduction of carbon dioxide and a preparation method thereof.The hydroxide anode for preparing carbon monoxide through electrochemical reduction of carbon dioxide comprises a base material and a catalyst arranged on the base material, the catalyst comprises a cobalt-chromium-molybdenum alloy and a coating layer coating the outer surface of the cobalt-chromium-molybdenum alloy, and the coating layer comprises a carbon coating layer and tungsten oxide loaded on the carbon coating layer. The molybdenum element, the cobalt element and the chromium element form an alloy, and CO accumulation is reduced. The surface of the cobalt-chromium-molybdenum alloy is coated with the carbon coating layer, the conductivity of the hydroxide anode is improved, CO molecules are prevented from making contact with the surface of the alloy, in the long-term use process, the activity of a catalyst cannot be reduced due to CO poisoning, the hydroxide reaction can be efficiently conducted in the electrolysis process, the Faraday efficiency is improved, and the stability of the electrode is guaranteed. Tungsten oxide is loaded on the surface of the carbon coating layer, so that the activity and the stability are further improved.

The application discloses a separation and analysis method of enantiomers in acetyl tetrapeptide-3 and application thereof. The application adopts high performance liquid chromatography for separation and analysis, wherein a hydrophilic octadecylsilane bonded silica gel column is selected, and an organic acid solution with a concentration of 0.05-0.15% by volume is used to elute at a flow rate of 0.2-1.0 mL / min, so that acetyl tetrapeptide-3 and enantiomers thereof can be effectively separated and analyzed, and the separation degree reaches 1.5 or above. The application avoids using organic reagents, is environment-friendly and less toxic to human bodies; and the application avoids configuring special instruments, is simple to operate and low in cost.

The utility model belongs to the technical field of carbon dioxide hydro-conversion, particularly relates to a membrane reactor for a reaction-separation coupling process, and aims to solve the problem of performance failure of the membrane reactor in a high-temperature environment in the background technology, the following scheme is provided: the membrane reactor comprises a reaction tube body, end covers are screwed on the outer walls of two ends of the reaction tube body, and the end covers are screwed on the outer walls of two ends of the reaction tube body; a product gas outlet is welded to one end of the outer wall of the bottom of the reaction tube body, a feed gas inlet is welded to the other end of the outer wall of the top of the reaction tube body, and a purge gas outlet is welded to the outer wall of one side of one end cover. The NaA molecular sieve membrane loaded by the ceramic hollow fiber carrier is adopted, a compact and defect-free zeolite membrane layer is formed through a multi-time in-situ growth process, the membrane can still keep a stable hydrophilic nano channel (the aperture is 0.4 nm) at the temperature of 300-400 DEG C and the high pressure of 4 MPa, water molecules are preferentially adsorbed and permeated, the thermodynamic equilibrium limitation is effectively broken, and compared with a traditional molecular sieve membrane, the membrane has the advantages that the membrane is simple in structure and convenient to use, and the cost is low. The thermal stability is obviously improved.

The application discloses a method for preparing L-serine by enzyme catalysis, and in-situ preparation of low-cost and high-activity THF is achieved by using a biological method or a chemical method; THF and enzyme inactivation are avoided by precisely controlling the flow addition of formaldehyde; the reaction system is optimized to promote the in-vivo circulation regeneration of THF, so that higher conversion efficiency is achieved with less THF feeding amount, and the use amount and cost of the expensive coenzyme THF are significantly reduced. The method is based on the optimization of the existing enzyme process, does not need complex equipment modification, and is easy to realize industrialized scale production.

The application discloses a removal device and removal method for organic matters in uranium purification conversion wastewater, and belongs to the field of uranium wastewater recycling. The application solves the problem that a small amount of organic phase contained in residual liquid of raffinate wastewater generated in a uranium purification process reduces the adsorption effect of exchange resin, and leads to a substandard treatment result of the wastewater. The application comprises a pre-separation tank, a vacuum separator, a pre-filter, a polymer separator and an adsorption filter which are sequentially connected through pipelines. A sewage pipeline is connected to the inlet end of the pre-separation tank. The outlet end of the pre-separation tank is further connected to a waste oil collection tank. A discharge port is arranged on the adsorption filter. Through the removal device and removal method for organic matters in uranium purification conversion wastewater, the content of organic phase in the uranium-containing wastewater is reduced to below 1 mg / L, the adsorption effect of the exchange resin is avoided to be reduced by the organic phase in the uranium-containing wastewater, the adsorption effect of the exchange resin on uranium ions in the uranium-containing wastewater is improved, and the uranium content of the uranium-containing wastewater is discharged below a standard value.

The invention discloses application of baicalin in relieving copper toxicity of duckweed, and belongs to the technical field of plant adversity physiology and heavy metal pollution remediation. Systematic research on the physiological regulation mechanism of baicalin on duckweed under copper stress innovatively discovers that the relative growth rate of duckweed can be remarkably increased through treatment of baicalin; according to the application, the chlorophyll synthesis level is effectively recovered, the photosynthesis inhibition effect caused by copper toxicity is fundamentally improved, it is proved that the threshold concentration for effectively relieving the copper toxicity is 400 [mu] M, the optimal action concentration window is 200-800 [mu] M, and the concentration interval can achieve synergistic antagonism on the toxicity of copper ions by adjusting the antioxidant metabolic pathway of duckweed. And a green and efficient new strategy is provided for heavy metal polluted water body remediation. The method is not only suitable for ecological restoration engineering of copper-polluted water areas, but also can be expanded and applied to cultivation of stress-resistant varieties of aquatic economic plants, and has important theoretical value and practical application prospect in improvement of heavy metal tolerance of stressed plants.

The invention relates to an octafluorocyclopentene preparation device and a use method thereof.The device comprises a pyrolyzing furnace, a filter, a condenser, a water washing device, an alkali washing device, a water removing device and a deep cooling device which are connected through pipelines, a pyrolyzing pipe is arranged in the pyrolyzing furnace, a composite catalyst is placed in the pyrolyzing pipe, and the filter is arranged in the filter; the front end of the distillation tower is connected with a raw material gas tank and a purging gas tank through a three-way pipe, the rear part of the distillation tower is sequentially connected to a filter, a condenser, a water washing device, an alkali washing device, a polymerization inhibition device, a water removal device and a cryogenic device, and finally collected condensate is distilled. The device is simple and reasonable in overall structure, simple in preparation process, efficient and safe.

This invention discloses an integrated ceramic catalytic filter tube, its preparation method, and its application, belonging to the field of industrial flue gas treatment. The integrated ceramic catalytic filter tube includes a ceramic filter tube substrate and a catalytic coating. The raw materials for the catalytic coating include a noble metal catalytic slurry and a vanadium-based catalytic slurry. The noble metal catalytic slurry includes a noble metal catalyst. The noble metal catalyst uses Nb-CeO2 / WO3 as a support and platinum and / or palladium as the active ingredient. The mass ratio between the active ingredient and the support is (0.1–0.15):1. The catalytic coating obtained by combining two different active catalytic slurries can compensate for each other's insufficient activity within different temperature ranges, improving the overall multi-pollutant removal efficiency of the catalytic coating. Furthermore, using a porous ceramic filter tube as the substrate material not only facilitates the distribution of the catalytic slurry but also helps retain particulate pollutants, achieving integrated denitrification and dust removal and efficient treatment of multiple pollutants in flue gas.

The invention provides a method for synthesizing ethylene glycol from ethylene, which comprises the following steps: in the presence of a free radical inhibitor, ethylene, hydrogen peroxide and a titanium silicalite molecular sieve are contacted in a mixed solution of water and an optional organic solvent to carry out oxidation-hydration one-step reaction, and the addition amount of the free radical inhibitor is 0.005-5wt% of the addition amount of the hydrogen peroxide. By introducing the efficient free radical inhibitor and selectively inhibiting a side reaction path, generation of acidic impurities is remarkably reduced, selectivity and product purity of ethylene glycol are improved, and the method is suitable for industrial production.

The application provides a carbon nanotube composite anti-poisoning cathode catalytic layer and a preparation method and application thereof. The cathode catalytic layer comprises a three-dimensional porous framework formed by carbon nanotube composites interwoven and jointed with each other, the carbon nanotube composite comprises multi-walled carbon nanotubes and an ionomer, the ionomer is uniformly dispersed on the outer wall of the multi-walled carbon nanotubes; a catalyst is distributed on the surface and inside of the three-dimensional porous framework; the tube diameter of the multi-walled carbon nanotubes is 40nm-80nm; the porosity of the catalytic layer is 50.4%-59.3%, and more than 95wt% of the ionomer contained is combined on the carbon nanotubes. The cathode catalytic layer of the application adopts large-diameter carbon nanotubes combined with ionomers, can significantly improve the proton conduction and oxygen transmission capacity of the cathode catalytic layer and reduce the poisoning effect of the ionomer on the catalyst, and enhance the effective efficiency and activity of the catalyst. In addition, the proton conduction capacity and operating power of the fuel cell under a high-temperature environment are enhanced.

This invention discloses a method for restoring saline-alkali patches and soil in grasslands using plant materials. The method for restoring saline-alkali soil includes the following steps: applying organic fertilizer, then tilling, then applying amino acid water-soluble fertilizer, and finally laying plant materials. This invention has the advantages of simple construction and low cost, and is a green and sustainable approach that enables the recycling of waste resources. This invention establishes a near-natural restoration method for saline-alkali patches in degraded meadow grasslands, which has significant practical implications for improving grassland productivity, improving the grassland ecological environment, and promoting the healthy development of the grassland industry.

The invention provides a catalyst for removing non-methane alkane and a preparation method of the catalyst. The catalyst for removing the non-methane alkane is prepared from the following raw materials: a Cu / MXene-Cr / Co doped g-C3N4-CeO2 composite carrier and a metal active component, through the synergistic effect of the composite carrier and the metal active component, the catalyst has excellent low-temperature catalytic activity, water resistance, sulfur resistance and cycling stability, can efficiently remove non-methane hydrocarbons in various waste gases, and has a wide application prospect.

This application relates to the field of insecticide technology, specifically to a slow-release insecticidal suspension and its preparation method. The insecticidal suspension comprises the following raw materials in weight percentages: 8%–30% thiamethoxam, 7%–20% lambda-cyhalothrin, 0.1%–2% slow-release agent, 3%–10% emulsifier, 1%–5% dispersant, 1%–5% silica, 1%–5% activated clay, 0.1%–2% xanthan gum, and water to 100%. The dispersant includes a first dispersant and a second dispersant; the first dispersant is sodium lignosulfonate, and the second dispersant is one or both of sodium maleic acid-acrylic acid copolymer and sodium naphthalenesulfonic acid formaldehyde polymer. The slow-release insecticidal suspension of this invention avoids Austronesian maturation, has good dispersibility, can be processed into high-concentration formulations, has low packaging costs, good stability, long shelf life, high suspension rate, and good slow-release effect.

The application discloses a preparation method of Mo-doped Bi2O3 and application of the Mo-doped Bi2O3 in photocatalytic nitrogen fixation, and is characterized in that: in the synthesis process of Bi2O3, molybdenum salt is added to obtain brownish yellow Mo-doped Bi2O3 through a solvothermal method. The preparation method is simple, raw materials are cheap and easy to obtain, the environment is less polluted, and the Mo-doped Bi2O3 is harmless to human bodies, has good photocatalytic nitrogen reduction performance, and has a good application prospect in the field of photocatalytic nitrogen fixation.

The application relates to the field of fuel cells and provides a preparation method of a fuel cell catalytic layer, which comprises the following steps: S1, mixing perfluorosulfonic acid ionomer and low-polarity dispersion solvent A, dispersing to obtain perfluorosulfonic acid dispersion liquid A; S2, mixing perfluorosulfonic acid ionomer and high-polarity dispersion solvent B, dispersing to obtain perfluorosulfonic acid dispersion liquid B; S3, mixing catalyst, deionized water and perfluorosulfonic acid dispersion liquid A, then drying in a vacuum environment, naturally cooling, and uniformly grinding to obtain ionomer-modified catalyst powder; and S4, mixing the catalyst powder obtained in the step S3 and the perfluorosulfonic acid dispersion liquid B, dispersing to obtain catalyst slurry, and coating the catalyst slurry on a proton exchange membrane to obtain a coated catalytic layer. The application has the advantages that the preparation method of the catalytic layer reduces the transmission resistance of reaction gas without introducing other substances and improves the performance of a membrane electrode.

The invention discloses a membrane electrode assembly for an electrochemical hydrogen compressor and a preparation method of the membrane electrode assembly. The membrane electrode assembly comprises a proton exchange membrane, and a slurry layer, a catalyst layer and a slurry layer are sequentially stacked on the surface of the proton exchange membrane; through the sandwich type structural design of the proton exchange membrane, the slurry layer, the catalyst layer and the slurry layer, falling and loss of catalyst particles in the reaction process are reduced, continuous and efficient utilization of a catalyst is guaranteed, more attachment sites are provided for the magnetron sputtering catalyst particles through the rough slurry layer surface, and the reaction efficiency is improved. The catalyst can be uniformly distributed at high density, the problem that catalyst particles are easily agglomerated on a smooth surface is avoided, and finally, excellent performance can still be kept under the condition of relatively low catalyst loading amount.