30results about How to "High removal depth" patented technology

The invention relates to a metal-modified 13X molecular sieve desulphurization adsorbent and its preparation method and use. The preparation method comprises preparing a metal salt solution as an active ingredient ion exchange salt solution for next use, taking a 13X molecular sieve, adding the 13X molecular sieve into the ion exchange salt solution for ion exchange reaction, carrying out filtration, washing the filter residues, carrying out drying, putting the dried filter residues into a tube furnace, carrying out roasting activation, and carrying out furnace cooling to obtain the molecular sieve desulphurization adsorbent subjected to metal ion exchange. The molecular sieve desulphurization adsorbent can be used for ultra-deep removal of sulfocompounds such as thiophene and its derivatives in gasoline and diesel oil. The metal-modified 13X molecular sieve desulphurization adsorbent has a large specific surface area and a rich micropore structure, can effectively remove a trace amount of sulfocompounds in gasoline, has the advantages of low cost, simple preparation processes, high removal depth and regeneration convenience, can be used for deep removal of sulfocompounds in fuel oil products and preparation of ultral-low sulphur clean fuel oil, reduces oil product combustion sulfide discharge-caused environmental pollution and improves environment quality.

The invention provides a polycrystalline diamond composite sheet and a treatment method thereof. The polycrystalline diamond composite sheet comprises a hard alloy substrate, a polycrystalline diamond layer and protection layers, wherein the polycrystalline diamond layer is compounded on the hard alloy substrate and comprises a layer without residual metal and a layer with the residual metal; the layer with the residual metal is located between the layer without the residual metal and the hard alloy substrate; the thickness of the polycrystalline diamond layer is 1.9mm-2.2mm; the thickness of the layer without the residual metal is 30-50 microns; the protection layers cover the bottom surface and all side faces of the hard alloy substrate, and part of the side face of the polycrystalline diamond layer. Compared with the prior art, the removing depth of the residual metal of the polycrystalline diamond layer of the polycrystalline diamond composite sheet provided by the invention is large and the hard alloy substrate is not corroded, so that the stability of the polycrystalline diamond composite sheet in a utilization process is improved and the service life is prolonged.

The invention relates to the field of purification of organic amine liquid, and discloses a system for removing a heat-stable salt in organic amine liquid and a method for treating the organic amine liquid by adopting the system. The system comprises an organic amine liquid storage device, an electrode liquid storage device, a desalting water storage device and a membrane stack, wherein the membrane stack communicates with the organic amine liquid storage device, the electrode liquid storage device and the desalting water storage device separately, and an organic amine liquid circulation loop,an electrode liquid circulation loop and a desalting water circulation loop are formed separately, the system further comprises conductivity meters and a control center, and the control center is used for receiving conductivity signals from the conductivity meters, and for adjusting circulation flows of the organic amine liquid circulation loop and the desalting water circulation loop, reuse of the organic amine liquid and discharge of waste liquid according to the conductivity signals of the conductivity meters. When the organic amine liquid is treated by the system, anions and cations in the amine liquid can be removed synchronously, so that consumption of alkali liquid and discharge of the waste liquid are reduced.

The invention relates to a production method comprehensively utilizing high-zinc cobalt raw materials. The method comprises the following steps that firstly, the high-zinc cobalt raw materials are subjected to reduction leaching, soluble valuable metals such as zinc and cobalt enter a solution, and solid-liquid separation is conducted; secondly, after solid-liquid separation, the solution is subjected to deironing through a jarosite method, the PH value is adjusted to 4.7+/-0.2 at the same time, aluminum in the solution is precipitated to be removed in an aluminum hydroxide mode, and solid-liquid separation is conducted; and thirdly, the solution enters a P507 extraction tank, 20%-30% of a P507 extraction agent is adopted, caustic soda liquid is added, the saponification rate is controlled to be 50-60%, Zn2+ in the solution is extracted into organic phases, the organic phases are washed through dilute sulfuric acid, other metal ions are co-extracted and washed down, then the organic phases are subjected to reverse extraction, the Zn2+ enters aqueous phases from the organic phases through reverse extraction by means of a dilute sulfuric acid solution, and a high-purity zinc sulfate solution is generated, concentrated and crystallized into zinc sulfate monohydrate crystals.

The invention relates to a multi-element alloy getter for purifying krypton and xenon, and a preparation method of the getter, and the getter can be used for solving the problems that the existing getter is poorer in pertinence, insufficient in handling capacity, high in energy consumption, easy in pulverization and short in service life, and the like. The multi-element alloy getter comprises the following components: 50-65% of zirconium, 10-20% of aluminum, 5-10% of iron, 2-10% of titanium, 3-5% of lanthanum, 3-5% of silicon and the balance of unavoidable impurities. The method comprises the steps of pretreatment of alloy simple substances, alloy smelting and alloy crushing. The getter can meet the purity requirement of high-purity krypton and xenon (99.999%), is large in fluctuation ranges of anti-raw gas fluorocarbon and oxygen nitrogen compound, large in raw gas impurity adsorption capacity, high in raw gas impurity removal depth, wide in service temperature range (300-1000 DEG C) and long in service life, and is not pulverized.

The invention relates to a leaching-purifying method for rare earth concentrate, and belongs to the field of non-ferrous metallurgy. According to the method, a leaching process is adjusted, and a two-stage reverse feeding countercurrent process is adopted, namely, in first-stage leaching, rare earth concentrate slurry is used as a base solution, and a leaching agent is added into the base solution, so that low-impurity rare earth leaching liquid is obtained; in second-stage leaching, first-stage leaching residues serve as raw materials, after a certain number of seed crystals are added, a leaching agent hydrochloric acid is added into the first-stage leaching residues, so that the leaching residues low in rare earth content and an acid leaching solution high in impurity content are obtained, and the acid leaching solution is returned to the first-stage leaching for use; and by means of the leaching process, separation of impurities can be achieved, and rare earth resources can be fully utilized. The method has the advantages of being simple in process, low in cost, high in impurity removal rate, high in rare earth recovery rate and the like, and has good industrial application prospects.

The invention discloses a preparation method of ammonium bifluoride. The method comprises steps as follows: a, dilute ammonia water and ammonium bifluoride mother liquor are mixed to adsorb gas containing fluorine and silicon, and a mixed solution is obtained; b, the mixed solution and filter-press residues obtained in Step d are mixed for slurry making and filter-press separation, and a filtrate and a silica by-product are obtained; c, ammonia is introduced into the filtrate; d, slurry is subjected to filter-press separation, and an ammonium fluoride filtrate and filter-press residues are obtained; e, the ammonium fluoride filtrate is subjected to vacuum concentration; f, concentrated slurry is dissolved, the pH value of the solution is adjusted with hydrogen fluoride, and cooling crystallization is performed; g, ammonium bifluoride crystals are filtered, separated and dried, and the ammonium bifluoride product is obtained. With the adoption of the method, the utilization rate of fluorine and ammonia is increased, the gas containing fluorine and silicon is changed into the ammonium bifluoride product with the high economic value in the phosphoric acid production process, the production cost is low, the economic benefit is significant, meanwhile, the purity and other indexes of the product meet the requirement for superior products, and the method is suitable to be popularized and applied in the field.

The invention provides a chelating adsorption filler as well as a preparation method and application thereof. The filler is molecular sieve filler loaded with a hydroxyquinoline compound, and organic acid can be loaded on the molecular sieve loaded with the hydroxyquinoline compound. The filler can be used for effectively removing a residual catalyst in a polyolefin solution, has the advantages of high ash removal speed, large adsorption capacity and small pressure drop, and is suitable for removing the catalyst in a plurality of olefin solution polymerization processes.

The invention discloses a C4 component selective hydrogenation catalyst giving consideration to both the removal depth of butadiene and the yield of 1-butene, and a preparation method thereof. The C4component selective hydrogenation catalyst is composed of an active component, selective assistants and a support carrier, the active component is Pd, the selective assistants are Ru and Ag, and the support carrier is a mixture of gamma-Al2O3, CeO2-ZrO2 and attapulgite; and the Pd accounts for 0.05-1.5% of the mass of the support carrier, the selective assistants Ru and Ag respectively account for0.05-2% of the mass of the support carrier, and the support carrier comprises, by mass, 50-60% of the gamma-Al2O3, 30-40% of the CeO2-ZrO2 and 10-20% of the attapulgite.

The invention relates to a catalyst for purifying CO in hydrogen-rich gas as well as a preparation method and application of the catalyst. The preparation method of the catalyst comprises the following steps: pretreating a pore-expanding base material; preparing a copper salt precursor, a cerium salt precursor, a metal M salt precursor with tetravalence and sepiolite powder to prepare slurry; infiltrating the pretreated pore-expanding base material by using the slurry; and drying the pore-expanding base material infiltrated with the slurry, and then roasting to obtain the CO purification catalyst in the hydrogen-rich gas. Compared with the prior art, in the preparation process of the catalyst, the pore-expanding base material participates, the preparation raw materials are low in price and easy to obtain, and the catalyst has mesh-shaped morphology, multi-level pore channels, high CO trapping capacity, low selective oxidation reaction temperature of CO in hydrogen-rich gas, high removal depth and relatively high moisture resistance.

An adsorbent for deeply removing trace carbon monoxide in hydrogen comprises an active component and a high-specific-surface-area active carbon carrier loading the active component, and the active component is a monovalent copper or bivalent copper compound. The preparation method comprises the following steps of: (1) dissolving an active component precursor in water, and fully stirring to obtain a precursor solution; (2) dispersing and impregnating an activated carbon carrier with a high specific surface area by using the obtained precursor solution; (3) integrally drying the impregnated carrier and the precursor solution at the temperature of 40-100 DEG C; and (4) sintering the dried carrier in an inert atmosphere at the temperature of 150-300 DEG C for 3-6 hours to obtain the adsorbent. The adsorbent is uniform in active component dispersion, high in removal depth, high in selectivity, large in capacity, low in activation temperature, easy to regenerate and suitable for deeply removing carbon monoxide in hydrogen fuel of a fuel cell. The preparation method is simple in process, low in cost, free of active component loss in the preparation process and easy to industrially amplify.

The invention discloses a method for capturing carbon dioxide from flue gas, which comprises the following step of: selectively adsorbing carbon dioxide in the flue gas by using an anion-containing hydrothermal stable column cage type metal-organic framework material as an adsorbent. The structure of the anion-containing hydrothermal stable column cage type metal-organic framework material is that hexa-coordinated metal ions M and a tridentate nitrogen-containing ligand L are coordinated to form a cage type structure, and then the cage type structure is connected through inorganic anions A to form a cross-linked column cage type structure. According to the method provided by the invention, carbon dioxide can be captured from the flue gas in a high-capacity and high-selectivity manner, the removal depth is high, the adsorbent is easy to regenerate, and the hydrothermal stability is good.

The invention discloses a building internal wall waterproof formaldehyde-removing coating applied to an indoor environment as well as a manufacturing method thereof. The waterproof formaldehyde-removing coating comprises three parts, namely a component A, a component B and a component C, wherein the component A is prepared by putting sawdust and green straws under the comprehensive action of cellulase, pectinase and diluted hydrochloric acid to obtain a viscous solution, performing high-temperature sterilization, performing neutralizing treatment by using alkali in an amount which is smaller than that of acid and finally implanting bacillus thuringiensis to cultivate; the component B is obtained by suspending an activated carbon micropowder, a 1000-mesh ash calcium powder and a 1000-mesh triple superphosphate powder into absolute ethanol; and the component C is formed by performing enzymolysis and alcohol washing on the sawdust and the green straws and dehydrating the remaining by using the cellulose taking lignin as a main material. The building internal wall waterproof formaldehyde-removing coating has a spontaneous respiration like property, a durable formaldehyde-removing effect and high removing depth, is green, pollution-free and water-resistant, and can consume water.