86 results about "Germanium dioxide" patented technology

The invention provides a preparation method of small-particle-size high-purity germanium dioxide, and relates to the technical field of new material preparation, and the preparation method comprises the following steps: S1, preparation of a hydrolysis solution, S2, spraying hydrolysis of germanium tetrachloride, S3, low-temperature aging, S4, solid-liquid separation and washing, and S5, high-temperature drying. The germanium dioxide production process is simple, low in cost and efficient, and the product is small in particle size and good in uniformity.

The invention discloses a method for preparing superfine high-purity germanium dioxide from germanium tetrachloride. The method comprises the following steps: step 1, preparing a reactor; step 2, preparing hydrolysis mother liquor; step 3, hydrolysis; step 4, suction filtration and washing; step 5, drying; and step 6, screening. According to the method for preparing the superfine high-purity germanium dioxide, the production efficiency of the superfine high-purity germanium dioxide can be effectively improved, and the superfine high-purity germanium dioxide is efficiently prepared by controlling the hydrolysis ratio, the acidity of hydrolysate, the germanium content, the temperature of the whole hydrolysis process, the hydrolysis rate and the stirring power.

The present invention belongs to the technical field of preparation of high-purity rare metal materials, and specifically relates to a method for preparing nano-scale high-purity germanium dioxide. High-purity germanium tetrachloride, polyvinyl alcohol solution and water are prepared, mixed and stirred to form a mixed solution, and then germanium dioxide is extracted through a hydrolysis reaction. The generated high-purity germanium dioxide is then strengthened by ultrasonic waves to prepare nano-scale germanium dioxide, thereby obtaining high-purity germanium dioxide with smaller particle size.

The invention relates to the technical field of preparation of germanium dioxide, in particular to a preparation method of ultra-pure germanium dioxide, which comprises the following steps: grinding a germanium ingot to obtain germanium powder; transferring the germanium powder into a closed reactor, introducing high-purity chlorine into the closed reactor, and fully reacting to obtain germanium tetrachloride; distilling and purifying germanium tetrachloride; adding ultrapure water into the purified germanium tetrachloride, fully stirring, standing, and filtering to obtain germanium dioxide precipitate; and cleaning, drying and calcining the germanium dioxide precipitate to obtain the ultra-high-purity germanium dioxide with the purity of 7N or above. Germanium dioxide obtained by the preparation method of ultra-pure germanium dioxide is high in purity and high in yield, the chlorine content is lower than 0.003%, and the preparation requirements of BGO crystals are met.

The invention provides a planting method of germanium-rich coix seeds. The planting method comprises the following cultivation steps that healthy and full coix seeds are soaked in a seed soaking agent; after seedlings emerge, soaking the seeds in a germanium-containing composite culture solution, and submerging all seeds of coix lacryma-jobi by the composite culture solution; in the early stage of ear spitting and flowering of the pearl barley, a germanium-containing foliar fertilizer aqueous solution is sprayed to the leaf surfaces of the pearl barley. The seed soaking agent comprises a germanium dioxide aqueous solution, a sesbania gum aqueous solution, bacillus velezensis, vitamins and gentiobiose. The germanium-containing composite culture solution is prepared from germanium dioxide, beta-hydroxyethyl germanium sesquioxide and water. According to the coix seeds planted through the method, the germanium element content and the zinc element content are increased, meanwhile, the content of cadmium, chromium, nickel, arsenic and lead elements in the seeds does not exceed the standard, and the coix seeds are rich in germanium and zinc elements, full in seeds and excellent in quality.

The embodiment of the present application relates to a device and method for preparing high-purity germanium powder by hydrogen reduction of germanium dioxide, belonging to the technical fields of germanium metallurgy and preparation of high-purity germanium materials. The device for preparing high-purity germanium powder by hydrogen reduction of germanium dioxide in the embodiment of the present application includes a furnace body. A furnace tube is penetrated through the furnace body, and both ends of the furnace tube extend outside the furnace body and are fixed by a furnace tube support. The furnace tube support is fixedly arranged on the furnace body. Inside the furnace tube, a graphite crucible assembly and a furnace plug are sequentially arranged from bottom to top, and there is a gap between the graphite crucible assembly and the furnace plug. The present application greatly reduces the usage amount of hydrogen, significantly improves the hydrogen utilization rate, and shortens the production cycle.

The invention discloses a method for producing high-purity germanium powder by reducing high-purity germanium dioxide with hydrogen. The method comprises the following steps: step 1, charging; 2, replacing air in the furnace; step 3, heating reduction; 4, performing reduction gas-liquid separation; and 5, cooling and discharging. According to the method, by designing a new reduction method and a new reduction reaction device, the actual consumption amount of hydrogen is close to the theoretical demand amount, the utilization efficiency, reduction efficiency and germanium recovery rate of hydrogen are improved, the time required by the whole reduction process is shortened, the power consumption is reduced, the daily productivity of single equipment is improved, the operation is simple, and the cost is low. The acidic water vapor is recycled after being condensed, more than 1% of germanium metal is recycled, and no waste gas is discharged to influence the environment.

The subject of the present disclosure provides the production of N-type or P-type or semi-insulating rutile germanium dioxide templates and thin films in order to obtain sun-blind photo detectors from optical systems in the ultraviolet (UV) wavelength, or to obtain UV light emitting diodes, or to produce semiconductor materials required for UV laser diode production, especially for use in the field of power electronics in the defence industry and / or in missile and aircraft tracking systems. The disclosure describes a system and a method for growing r-GeO2 (rutile germanium dioxide) template and thin films using the chemical vapour deposition (CVD) method.

The invention discloses tetragonal system germanium dioxide and a hydrothermal synthesis method thereof. According to the method, hexagonal crystal system germanium dioxide is taken as a raw material, a hydrothermal reaction is carried out in an acidic aqueous solution, and efficient conversion from a hexagonal crystal system to a tetragonal crystal system is realized by controlling the reaction temperature to be 120-240 DEG C, the reaction time to be 24-48 hours and the pH value to be 1-3. According to the preferable scheme, the raw materials are subjected to calcination pretreatment at the temperature of 500-600 DEG C, the yield of the tetragonal crystal phase can be remarkably increased, and the synthesis temperature can be reduced to 120 DEG C. According to the invention, stable synthesis of tetragonal system germanium dioxide is realized for the first time under the mild condition of 240 DEG C and below, and the technical problem that high-temperature transformation at 1000 DEG C or above is needed in the traditional method is solved. The tetragonal crystal system germanium dioxide prepared by the method is of a regular polyhedral structure, has the particle size of 400-500nm, and can be used as a high-efficiency catalyst for polyester synthesis. The process is energy-saving and environment-friendly, the total utilization rate of the raw materials is increased by recycling the waste liquid, and the process has remarkable industrial application value.

The invention provides a preparation method of high-purity germanium dioxide, and relates to the field of preparation and research of detectors, and the method comprises the following steps: S1, carrying out a hydrolysis reaction on germanium tetrafluoride gas, and adding dilute sulfuric acid into the generated germanium tetrafluoride hydrolysate to generate a germanium sulfate solution; s2, adding a sodium hydroxide solution into the germanium sulfate solution, and stirring to generate a sodium germanate solution; and S3, adding concentrated hydrochloric acid into the sodium germanate solution, carrying out chlorination distillation, stopping distillation when the distillation temperature of a fraction is greater than or equal to 110 DEG C to obtain a germanium tetrachloride fraction, cooling, hydrolyzing, filtering and drying to obtain the high-purity germanium dioxide. According to the preparation method disclosed by the invention, the hydrolysis loss of the germanium tetrachloride is effectively reduced, the distillation yield of the germanium tetrachloride is improved, so that the yield of the germanium dioxide is improved, other volatile substances are not introduced in the reaction process, other impurities are not introduced during distillation of the germanium tetrachloride, and the purity of the germanium dioxide product is effectively improved.

This utility model discloses a germanium dioxide drying device, including a housing. An electric heater penetrates the bottom surface of the housing. A material box is installed inside the housing, and a metal handle is installed on one end of the material box. An installation box is installed on the rear end of the housing. A breathable mesh is fixedly inserted through the upper part of the housing. A door is installed on the end face of the housing via hinges, and a heat exchange box is fixedly inserted through the end face of the door. A control panel is installed on one side of the housing. Two sets of installation covers are fixedly inserted through the end face of the installation box. A bidirectional lead screw is installed inside the installation box via bearings, and two sets of lead screw sleeves are fitted onto the side walls of the bidirectional lead screw. Each set of lead screw sleeves has a connecting plate fixedly fitted onto its side wall. Beneficial effects: This utility model uses an installation box, which facilitates the installation of the drying structure, bringing convenience to the installation of the germanium dioxide drying device.

The invention relates to a preparation method of tetragonal crystal system germanium dioxide, which comprises the following steps: reacting high-purity hexagonal crystal system germanium dioxide with water vapor in a closed titanium high-pressure reaction kettle, cooling to room temperature, and washing and drying the solid obtained by the reaction to obtain tetragonal crystal system germanium dioxide crystals. The tetragonal system germanium dioxide crystal obtained by the method is high in purity and free of impurity introduction, complex chemical reagents do not need to be added in the preparation process, the preparation process is greatly shortened, and a new thought is provided for preparation of a germanium dioxide crystal material with a special morphology. The method disclosed by the invention is a one-step hydrothermal reaction method, and has the advantages of simple process, convenience in operation, easiness in repetition and the like.

The invention discloses a WS2 negative electrode material and a preparation method thereof, a negative electrode and a supercapacitor, and the preparation method comprises the following steps: S1, carrying out the hydrothermal synthesis reaction of tungsten disulfide and germanium dioxide, and obtaining a doped material; s2, germanium dioxide in the doped material is extracted through a solution etching extraction method, and a porous WS2 material is obtained; and S3, carrying out hydrothermal reaction on the porous WS2 material, a cross-linking agent and zirconium dioxide to obtain the modified WS2 negative electrode material. Through the porous structure, crosslinking and ZrO2 doping, the negative electrode material can maintain high specific surface area and has structural stability and high conductivity at the same time, so that the large-current charge-discharge performance of the supercapacitor is remarkably improved.

The invention belongs to the technical field of lithium ion battery negative electrode materials, and particularly relates to a preparation method for preparing a germanium-carbon nano composite material of a lithium ion battery by a hydrothermal method. The preparation method comprises the following steps: adding germanium dioxide into a sodium hydroxide solution, and violently stirring by using a magnetic stirrer until the germanium dioxide is completely dissolved to obtain a sodium germanate clear solution; dropwise adding concentrated hydrochloric acid into the sodium germanate solution to form a white suspension, and adding a carbon nanotube; putting the mixed solution into a hydrothermal reaction kettle, and carrying out hydrothermal reaction; and repeatedly filtering and washing the material by using absolute ethyl alcohol and ultrapure water, and finally carrying out vacuum drying to obtain the germanium-carbon nano composite material. Germanium dioxide and carbon nanotubes are selected as raw materials, the germanium-carbon composite material with a nano structure is generated through a hydrothermal reaction, no binder or catalyst is used, the preparation process is simple, the cost is low, the obtained material is stable in performance, high in energy density and suitable for long-term storage, and support is provided for commercial application of germanium-based negative electrode materials.

The utility model discloses a vertical tubular stainless steel high-purity germanium dioxide reduction device which is composed of a tubular hearth, a heating furnace, a heat preservation layer, a high-purity hydrogen supply pipe, an air cooling cooler, a water cooling cooler and a gas-liquid separator. The tubular hearth is vertically arranged in the heating furnace, and a heat preservation layer is arranged outside the heating furnace; the high-purity hydrogen supply pipe penetrates through the heating furnace and is connected with the top of the tubular hearth; an air outlet pipe is arranged at the bottom of the heating furnace and is connected with an air-cooled cooler; and the air-cooled cooler is connected with the gas-liquid separator through the water-cooled cooler. The tubular hearth is vertically arranged, so that high-purity hydrogen and high-purity germanium dioxide are more fully contacted, the utilization rate and the reduction efficiency of the high-purity hydrogen are higher, the time required by the technological process is shortened, the power consumption is reduced, a high-purity hydrogen pipeline is preheated in the reaction furnace, and the production efficiency is improved. The insufficient reaction temperature caused by the fact that cold air flow directly enters the materials to take away part of heat is avoided.

The invention relates to the technical field of biological agriculture, in particular to a preparation method, device and application of basic ionic liquid for animals, and the basic ionic liquid comprises potassium bicarbonate, potassium carbonate, sodium bicarbonate, sodium carbonate, germanium dioxide, sodium selenite, chromic oxide, chitosan oligosaccharide and purified water. The preparation method and device of the basic ionic liquid for animals and the application have the beneficial effects that through scientific proportioning and careful preparation, the basic ionic liquid can remarkably improve the growth performance, the immunity and the intestinal health level of animals, improve the villus height and the crypt depth of jejunum and ileum, and improve the animal immunity. And a ratio of fluff length to recess depth; and by optimizing the equipment structure and the operation process, the preparation efficiency and quality are improved, and the labor cost and the error rate are reduced.

The invention provides a preparation method of germanium dioxide. The invention relates to a preparation method of germanium dioxide, which comprises the following steps: preparing a concentrated hydrochloric acid solution of germanium tetrachloride, and enabling the germanium tetrachloride in the mixed solution not to generate hydrolysis reaction; the mixed solution is electrolyzed, chlorine is generated by an anode, hydrogen is generated by a cathode, and the concentration of hydrochloric acid in the mixed solution is reduced; and when the concentration of the hydrochloric acid is reduced to a threshold value for promoting the germanium tetrachloride and the water to generate hydrolysis reaction, continuously reacting to enable the germanium tetrachloride and the water to react to generate germanium dioxide precipitate, and separating out the germanium dioxide precipitate after the reaction is finished. The concentration of the germanium tetrachloride is 0.76 mol / L. According to the method for preparing germanium dioxide by promoting germanium tetrachloride hydrolysis through electrolysis of concentrated hydrochloric acid, the situation that extra alkali is used for adjusting the reaction is avoided, the production cost and environmental pollution are reduced, and meanwhile the product purity and the production efficiency are improved.

This invention belongs to the technical field of lithium-ion battery anode materials, specifically a method for preparing germanium-carbon nanocomposite materials for lithium-ion batteries using a hydrothermal method. The preparation method includes: adding germanium dioxide to a sodium hydroxide solution and stirring vigorously with a magnetic stirrer until the germanium dioxide is completely dissolved to obtain a clear sodium germanate solution; adding concentrated hydrochloric acid dropwise to the sodium germanate solution to form a white suspension, and then adding carbon nanotubes; placing the mixed solution in a hydrothermal reactor for hydrothermal reaction; repeatedly filtering and washing the material with anhydrous ethanol and ultrapure water; and finally vacuum drying to obtain the germanium-carbon nanocomposite material. This invention uses germanium dioxide and carbon nanotubes as raw materials to generate a nanostructured germanium-carbon composite material through a hydrothermal reaction. It does not use any binders or catalysts, has a simple and low-cost preparation process, and produces a material with stable performance, high energy density, and suitable for long-term storage, thus supporting the commercial application of germanium-based anode materials.

The invention discloses a morchella hypha powder prefabrication method and equipment line, belongs to the technical field of morchella hyphae, and solves the problems that morchella is extremely sensitive to continuous cropping, metabolite changes the soil microenvironment, hypha division and nutrient absorption are directly hindered, the hypha growth speed is reduced by 30%-50%, the biomass is reduced, and primordium formation is delayed. Comprising the following steps: S1, carrying out stress-resistant intensified culture on liquid strains; chitosan in a specific proportion in a liquid strain neutralizes dopamine quinone, antioxidant enzyme is induced to be improved, fat-soluble toxin is embedded in beta-cyclodextrin in a solid culture medium, dendrobium nobile residues adsorb water-soluble toxin, sodium selenite enhances oxidation resistance, germanium dioxide promotes hypha branching, an overburden filtrate degrades dopamine quinone, ash hydrolyzes related toxin, and the yield is increased. Pseudomonas compensates for beneficial metabolites and accelerates metabolism through temperature difference stimulation, so that hypha growth is accelerated, differential metabolites are reduced, biomass is increased, and the three-crop fruiting rate is stable.

This invention discloses a process for recovering germanium from germanium-silicon alloy waste, belonging to the field of germanium recovery technology. The process includes the following steps: S1. Oxidizing and roasting the germanium-silicon alloy waste to obtain roasted clinker; S2. Sulfidating and fixing the roasted clinker and pyrite to obtain activated clinker; S3. Leaching the activated clinker with sulfuric acid, followed by solid-liquid separation, and collecting the germanium-containing leachate; S4. Performing multi-stage countercurrent extraction on the germanium-containing leachate using an amine extractant to obtain a loaded organic phase; then back-extracting the loaded organic phase with an alkaline back-extraction solution to obtain a germanate solution; S5. Hydrolyzing and precipitating the germanate solution to obtain pure germanium dioxide. The roasting process of this invention fixes impurities and activates elemental germanium into soluble germanium dioxide. The purification stage efficiently separates germanium from other impurity ions, and the final hydrolysis precipitation controls product consistency. This invention's recovery process has high recovery efficiency and purity, is more environmentally friendly, and is expected to achieve large-scale production.

The invention relates to a preparation method of polyester staple fibers. A composite functional additive is designed to be a mixture of silicon dioxide, germanium dioxide, aluminum oxide and surface-modified aluminum-doped zinc oxide powder, so that the polyester staple fibers can obtain good far-infrared emission function, thereby obtaining good thermal insulation performance, and the thermal insulation performance can be further improved by matching the design of the powder particle size. Dimethyl propanediol, 2,5-dimethyl-2,5-hexyne diol, 2-butene-1,4-di-n-butyl ester and di(hexane-1,6-diol) titanium are added, so that the prepared polyester staple fibers have good thermal insulation performance, breaking strength and moisture regain. Coconut charcoal can absorb and emit far-infrared rays with a wavelength of 4 to 14 μm, thereby stimulating the formation of negative ions that are beneficial to the body, and can generate a porous and water-permeable surface layer on the fiber surface, so that skin sweat can be dissolved, and dryness and comfort can be ensured while keeping warm, and bacterial growth can be avoided.

The present application relates to a kind of Ge-C composite mesophase carbon microspheres and its preparation method and application, biomass tar pitch and nanoscale germanium dioxide are added to raw oil, and Ge-C preliminary composite mesophase carbon microspheres are obtained by direct thermal polycondensation reaction;Linoleic acid is sprayed as sacrificial layer to its surface, and after pre-oxidation, nanometer Ge is attached to the surface of mesophase carbon microspheres, and a layer of amorphous carbon is attached to the outermost layer of surface, forming the mesophase carbon microspheres of the structure of core Ge / C composite-irregular carbon skeleton / Ge composite-inner surface-amorphous carbon layer structure on the surface.The present application uses cheap and easily available heavy oil as raw material, uses direct thermal polycondensation method and series modification, forms complete Ge / C composite mesophase carbon microspheres, has good conductivity, higher reversible specific capacity and rate performance, and can be stable after 200 cycles after being prepared into battery, the reversible capacity is as high as 1275 mAh / g after 200 cycles at 0.1C current density, and the reversible capacity is as high as 1162 mAh / g after 200 cycles at 1C current density.

The present invention is a method for preparing GeO2 micron balls for lithium ion battery negative electrode. The method comprises the following steps: first, using a vacuum arc melting furnace to melt Al and Ge to form Al (100‑x) Ge x The master alloy ingot is cast and the melt is then sprayed onto a copper wheel to produce a precursor strip. The precursor strip is then ball-milled to produce a precursor powder with a particle size of 2-4 μm. Finally, the precursor powder is immersed in an HCl solution for dealloying for 8-12 hours to obtain GeO2 microspheres. The germanium dioxide anode material prepared by this method is simpler and more environmentally friendly than previous methods and processes. The microspheres are uniform in size and exhibit structural and performance advantages when used as a lithium-ion battery anode material.

The invention discloses an efficient sedimentation and recycling process based on germanium dioxide in hydrogen peroxide tail gas absorption liquid and application, and belongs to the technical field of industrial waste gas treatment and scattered metal recycling in the special gas industry. The process comprises the following steps: carrying out standing separation on hydrogen peroxide tail gas absorption liquid, and carrying out synergistic regulation on a sedimentation layer through pH and a composite flocculant to realize efficient sedimentation of germanium dioxide; dehydrating the germanium dioxide concentrated phase to form a filter cake, and carrying out three-stage countercurrent washing and staged heating drying to obtain a crude germanium dioxide solid product; the filtrate and the settled supernate are subjected to primary pH regulation, secondary membrane separation and adsorption and three-stage closed-loop hydrogen peroxide replenishing three-stage purification systems, so that efficient cyclic utilization of hydrogen peroxide is realized; the germanium dioxide recovery rate reaches 99% or above, the hydrogen peroxide recovery rate reaches 95%, the process cost is reduced by 40% or above, and the method has the advantages of being simple in process, high in resource recovery rate and low in operation cost and is suitable for treatment and resource utilization of germanium-containing tail gas in production of semiconductors, photovoltaic materials and special gases.

To provide a method for industrially advantageously producing a crystal excellent in crystallinity and useful for a semiconductor device, etc.SOLUTION: A method for producing a germanium dioxide crystal by crystal growth using a germanium-containing source material, wherein the source material contains antimony and the antimony content is 0.1 mol% or more and 10 mol% or less based on the source material, and the crystal is produced by heating the source material.SELECTED DRAWING: Figure 1

The invention provides a preparation method of chlorine-free high-purity germanium dioxide, and belongs to the technical field of preparation of new materials, the preparation method comprises the processes of ball milling, charging, positive pressure oxidation, high-pressure segmented oxidation, nitrogen introduction and exhaust, kettle stopping and discharging, solid-liquid separation, drying and the like, and the method can be used for directly preparing the chlorine-free high-purity germanium dioxide from metal germanium; and the method has the advantages of high product yield, simple process operation, environmental friendliness and the like. And the output rate of the high-purity germanium dioxide is greater than 99%. Only ozone, nitrogen and the like are used in auxiliary materials, no waste water or waste residues are generated in the whole process, and environmental benefits are remarkable.

The invention relates to an improved synthesis process of a cesium germanium bromide halogen perovskite material. The improved synthesis process comprises the following reaction steps: (1) constructing a condensation reflux device and a nitrogen pipeline; (2) weighing germanium dioxide, hydrobromic acid, concentrated hypophosphorous acid and absolute ethyl alcohol; (3) putting the three-neck flask into an oil bath pan, and connecting a condensation reflux device and a nitrogen gas path; (4) after germanium dioxide is completely dissolved, the solution in the flask is clarified; (5) injecting the cesium bromide solution into the three-neck flask in a nitrogen environment, heating, and reacting for a period of time; (6) cooling the solution to room temperature in a nitrogen environment, and collecting a yellow cesium germanium bromide crude product; and (8) refining the crude cesium germanium bromide to obtain refined cesium germanium bromide, wherein the impurity content is lower than 0.5%. According to the method, the cesium-germanium bromide solution and methylbenzene are used, so that the problem that divalent germanium ions and cesium bromide are not completely reacted is solved, and a good solution is provided for synthesizing a high-purity cesium-germanium bromide material.

The invention discloses a preparation method of metal germanium. The preparation method comprises the following steps: primary crushing of raw materials; a germanium-containing material is selected and put into a ball mill to be smashed; adding alkali and leaching; adding alkali into the crushed germanium-containing material for leaching; roasting is performed; the germanium-containing material obtained after leaching is put into a roasting furnace to be roasted till the germanium-containing material becomes yellow; performing secondary crushing; taking out the roasted germanium-containing material, and further crushing in a Raymond mill; performing chlorination distillation; putting the crushed germanium-containing material into a closed reaction kettle, introducing chlorine, and distilling to obtain germanium tetrachloride; performing secondary distillation; putting germanium tetrachloride obtained by distillation into a closed reaction kettle, and adding 2N hydrochloric acid for secondary distillation; performing hydrolysis; putting the germanium tetrachloride subjected to secondary distillation into a reaction kettle, adding pure water, hydrolyzing, filtering and drying to obtain germanium dioxide; performing reduction; putting germanium dioxide into a closed quartz boat, heating to 1100 DEG C, and adding hydrogen and oxygen for reduction to obtain a germanium ingot; melting into a strip shape; performing ultrasonic detection to obtain a finished product.

The invention discloses a paper protection liquid based on a nano GeO2 / CTAB (cetyltrimethyl ammonium bromide) compound and application of the paper protection liquid in paper protection, and belongs to the technical field of paper protection. The protection liquid is obtained by dissolving a nano GeO2 / CTAB (cetyltrimethyl ammonium bromide) compound in deionized water, wherein the nano GeO2 / CTAB compound is formed by mixing germanium dioxide, NaOH and CTAB in a water phase according to a certain proportion and growing. The advantages of weather resistance and ultraviolet resistance of the nano GeO2 / CTAB compound are fully utilized, and paper repaired by the multifunctional protection liquid better embodies the principle of'repairing old as new 'of cultural relic protection in the aspects of gloss, texture and the like; the nano GeO2 / CTAB compound paper protection liquid not only can inhibit the growth and reproduction of gram-positive bacteria and gram-negative bacteria on the surface of paper, but also can play a good role in killing and inhibiting fungi and spores thereof separated from the surface of the paper.

The utility model relates to the technical field of waste gas recovery, and discloses a waste gas recovery system of a germanium dioxide reduction furnace, which comprises a waste gas treatment mechanism and a separation recovery mechanism, and the waste gas treatment mechanism comprises a first container tank and a second container tank. The waste gas treatment mechanism is composed of a first container tank and a second container tank, waste gas can sequentially pass through the two container tanks to be treated, targeted reactions can be conducted according to different components in the waste gas in the stage treatment mode, and the waste gas treatment effect is effectively improved. Sealing rings are arranged at the top and the bottom of the polymeric membrane, and slots matched with the sealing rings are formed in the upper mounting plate and the lower mounting plate, so that the polymeric membrane is stably mounted, meanwhile, the sealing rings can effectively prevent waste gas from leaking from mounting gaps, and an operator can conveniently and quickly open or close the fastening cover through the rotating plate; and parts in the tank can be conveniently mounted, maintained and replaced.