87results about How to "Regulate acidity" patented technology

The invention discloses a micro-porous alumina carrier and relative preparing method, which contains boric oxide and another agent selected from phosphor, silicon, zirconium, and titanium. The invention adds the boric acid into water or peptizate acid whose temperature is higher than room temperature, then adds the mixture of alumina leading material and physics expanding-hole agent to be molded, dried, and burnt to attain the final carrier. The inventive carrier contains a proper agent, with the characters of large aperture, centralized distribution hole and a certain acid. And its surface acid and aperture can be adjusted easily. Therefore, the invention can overcome the defects of present technique which can not have aforementioned characters at the same time. The inventive alumina carrier can be used in variable hydrogenation catalyst.

The invention discloses a method for preparing a hydro-demetalization catalyst, which comprises the following steps of: (1) weighing two kinds of pseudoboehmite dry colloidal powder with different natures, evenly mixing, adding an extrusion aid, then, carrying out peptization, forming, drying, and roasting to prepare an alumina carrier; (2) preparing a dipping solution from a VIB metallic compound and / or a VIII metallic compound; and (3) dipping the alumina carrier prepared in the step (1) by using the dipping solution prepared in the step (2), drying an obtained wet catalyst, and then, roasting the catalyst in water-vapor-contained atmosphere to prepare the final catalyst. With the adoption of the method disclosed by the invention, the hydro-demetalization catalyst with a large pore diameter, large pore volume and concentrated pore distribution can be prepared under the condition of not using a pore-expanding agent.

The invention relates to a method for preserving white fish by removing the scales and the internal organs of the white fish, cleaning the whiter fish, cutting into sections, pretreating, preserving and storing at low temperature. The method comprises the following steps: (1) pickling the pretreated white fish with salt and garlic powder for 5-15min, cleaning the white fish, and soaking into a preservative for 20-40min; (2) subjecting the white fished treated in the step (1) to modified atmosphere packaging by using a modified atmosphere packaging machine; and (3) subjecting the packaged white fish to direct gamma irradiation by using a cobalt 60 irradiation source. The method is easy to operate and practical. Due to the adoption of the method, the freshness and the color of the meat of the white fish can be better kept, and the shelf life of the meat of the white fish can be prolonged. The preservative is convenient to use and is safe and environmentally-friendly.

The invention discloses composite agricultural fertilizer. The composite agricultural fertilizer is prepared by the following raw materials in parts by weight: 35-40 parts of straw powder, 20-25 parts of ground phosphate rock, 22-24 parts of dolomite dust, 18-20 parts of quick lime, 15-18 parts of shell powder, 12-15 parts of diatomite, 10-13 parts of turf, 7-11 parts of urea, 6-10 parts of monoammonium phosphate, 5-8 parts of potassium chloride, 3-4 parts of zinc sulfate, and 10-13 parts of soil modifier. According to the fertilizer disclosed by the invention, energy and nourishments are provided by plants to improve the utilization rate of the fertilizer, so that the yield and quality of crops are prominently improved; in addition, the soil physicochemical property and soil nutrient status can be effectively improved by the soil modifier, added in the fertilizer, so as to promote the plants to adsorb nutrients and moisture and act positive effects on soil microorganisms.

The invention discloses a modified aluminum oxide carrier and a preparation method thereof. The modified aluminum oxide carrier is prepared from aluminum hydroxide gel serving as a raw material by the steps of introducing an auxiliary agent before and / or after drying, and then forming, drying and roasting, wherein the aluminum hydroxide gel is prepared by a molten salt super-solubilizing micelle method. In the preparation process of the carrier, the aluminum hydroxide gel comprises a surfactant and a hydrocarbon component, so after the processes of forming and roasting, nano-aluminum oxide particles formed by dehydrating polymerized aluminum hydroxide still have bar-shaped basic structures and are stacked into a frame structure out of order; and the properties of a catalyst are further improved by adjusting the acidity of the carrier and the interaction between an active metal and the carrier through the auxiliary agent. The carrier has the advantages of large pore volume, large aperture, high porosity, larger orifice on the outer surface, high pore canal penetrability, favorability for increasing deposition of impurities and capacity of prolonging the running period of the catalyst.

The invention discloses a hydrotreating catalyst and a preparation method thereof. In the method, a boron aid is introduced by adding stable boron-containing organic compound solution after aluminium hydroxide is gelatinated, so that the boron aid is uniformly distributed in the catalyst and the activity phase transformation promoting effect of the boron acid is enhanced; moreover, the obtained catalyst has a high pore volume, a large specific surface area, an appropriate pore structure and appropriate acidity, enhances the activity and stability of the catalyst and is particularly suitable for the hydro-denitrogenation process of heavy hydrocarbons.

The invention discloses a protective cultivation method of a tea garden and belongs to the technical field of horticultural plant cultivation. The method comprises the steps of applying mulch to the tea garden with straw plants or growing plants or combination of straw plants and growing plants in May, and ditching between lines of tea trees before the mulch and applying base fertilizer mixed by farmyard manure, potassium sulphate for agricultural use, regular calcium superphosphate and urea; and applying urea in small holes near the tea trees once in May of the next year. According to the protective cultivation method of the tea garden, contents of organic matter, soil alkali-hydrolyzable nitrogen, available phosphorus and available potassium in top soil are improved fast after three months, soil acidity is adjusted, soil environment is improved, the water content of soil is greatly improved, water and soil loss is reduced, tea quality is improved, the soil structure in the tea garden is changed, the fresh leaf yield ratio is increased by 11.3-15.6% comparatively, income is increased, and protective cultivation and sustainable development of the tea garden are achieved.

The invention provides a novel peroxoheteropolyacid-based ionic liquid and a preparation method of the ionic liquid. The ionic liquid is first reacted with an alkylimidazole and a sultone to generate an ionic liquid intermediate, and then the ionic liquid is The liquid intermediate is reacted with a peroxoheteropolyacid solution, and its general structural formula is: RxH3-x{QO4[MO(O2)2]4} where: Q is a P or As atom, and M is a Mo or W atom , R is, m is 0~8, n is 3 or 4, and x is 1~3. The new ionic liquid has strong Brönsted acidity and oxidation.

The invention discloses a recycling treatment process for chlorohydric acid pickling liquid waste. The process comprises the following steps: adjusting the acidity of CaCO3 of the chlorohydric acid pickling liquid waste to 99.65-124.56g / L; adding ferrous chloride so as to enable ferrite to be in a saturation condition; heating to the bubble point, then feeding the mixture into a rectifying tower and separating, wherein the pressure in the rectifying tower is 61.05-67.50Kpa; recovering a 10-15% diluted hydrochloric acid liquid and ferrous chloride crystals. Through reasonable parameter control and decompressing and rectifying processes, hydrochloric acid liquor applicable to acid pickling steel pieces as well as a coagulant capable of being used for sewage and wastewater treatment or a chemical raw material ferrous chloride can be recovered just by means of materials generated in the steel piece acid pickling process without spending other raw materials, so that the cost is greatly saved. The process is process-investment-saving, low in energy consumption and easy for mastering of operation, and can be continuously operated or intermittently operated in batches, thereby realizing automatically controlled operation.

The invention belongs to the field of inorganic nanometer composite materials and discloses a preparation method of a heteropolyacid ionic liquid-loaded Sn-SBA-15 catalyst and application of the catalyst. The preparation method comprises the following steps: preparing a Sn-SBA-15 mesoporous molecular sieve; preparing heteropolyacid ionic liquid; and preparing the heteropolyacid ionic liquid-loadedSn-SBA-15 catalyst. According to the preparation method, the ionic liquid bound with organic cations and heteropoly anions is loaded on a metal atom modified mesoporous material, and the heteropolyacid ionic liquid is bound with a mesoporous material Sn-SBA-15, so that the advantages of the heteropolyacid ionic liquid and the mesoporous material are integrated, the disadvantages of the heteropolyacid ionic liquid and the mesoporous material are overcome, the problem that the ionic liquid is difficult to be treated due to high viscosity is solved, and the acidity, activity and repeated utilization rate of an acid catalyst are greatly increased.

The invention provides a selective hydrodesulfurization process which comprises the following steps: cutting a gasoline feedstock into light ends and heavy ends; performing liquid-liquid extraction for the light ends to obtain light end raffinate containing olefins and light end extraction oil containing sulfide and aromatics; and using selective hydrodesulfurization catalysts to perform selective hydrodesulfurization for the light end extraction oil and the heavy ends, wherein the main component of the selective hydrodesulfurization catalyst is obtained by loading an active metal component with a metal oxide, treated with a metal salt, as the carrier, wherein the active metal is selected from more than two elements in IA, VIII, VIB and VIIB groups in the periodic table. The selective hydrodesulfurization process provided by the invention has the advantages of high desulfurization rate and small loss of the octane value of sweet gasoline.

The invention relates to a core-shell structured nano monocrystal ZSM-5@Silicalite-1 molecular sieve and a preparation method thereof. According to the preparation method, a nano ZSM-5 molecular sieveis used as a core phase, and the grain size is 50 to 800 nm; a nano Silicalite-1 molecular sieve is used as a shell phase, and a shell layer is 5 to 100 nm in thickness; after the outer surface of the core-phase ZSM-5 molecular sieve is pretreated with a weakly acidic solution, the core-phase ZSM-5 molecular sieve is subjected to hydrothermal crystallization in a shell-layer molecular sieve growth solution system, so that the nano monocrystal ZSM-5@Silicalite-1 molecular sieve containing a compact shell layer is prepared. The molecular sieve provided by the invention has the characteristics of a continuous porous channel, low diffusion resistance, high integration mechanical intensity and high selectivity; furthermore, the molecular sieve can be effectively applied to a catalytic crackinggasoline hydrogenation modification process, and has excellent catalysis performance on aspects of aromatics shape-selective disproportionation, shape-selective alkylation, shape-selective isomerization, catalytic cracking gasoline hydrogenation modification and the like.

The invention discloses a fresh-cut Chinese yam fresh keeping agent. The fresh keeping agent comprises 0-0.1% of gamma-aminobutyric acid, 0.5-2.5% of calcium lactate, 0.05-0.1% of zinc acetate, 5-10% of a garlic extract liquid, 10-20% of a loquat leaf extract liquid, and the balance of purified water. The fresh keeping agent overcomes the restriction problems of difficult effective freshness keeping and difficult effective preservation time prolongation of present natural fresh keeping agents, and can greatly prolong the preservation time of fresh-cut Chinese yam and greatly improve the preservation freshness of foods due to compounding of synthetic additives with low concentrations and pure natural additives.

The invention discloses a method and system for producing diesel oil from an inferior oil material. The method includes the steps: mixing the inferior oil material with waste plastics, then carrying out a pyrolysis reaction, then making an obtained pyrolysis gas contact with a catalyst and carrying out a catalytic reaction, separating the obtained catalytic reaction product to form a gas-phase product and a liquid-phase oil product, and hydrotreating the liquid-phase oil product to form naphtha and diesel oil. The obtained naphtha can go to an ethylene-removing cracking unit to be used as a cracking raw material, and the obtained diesel oil can be used as a qualified diesel oil product and leaves factories. The method has the advantages of simple process and cheap and easily obtained raw materials, can make full use of the waste plastics, the inferior oil material and other resources, and also is green and environmentally friendly; and the yield of light fuels can reach more than or equal to 95%, and the obtained diesel oil has good quality.

The invention discloses a method for preparing a hydro-demetalization catalyst, which comprises the following steps of: weighing or preparing an alumina carrier; (2) preparing an ammonia solution or an aqueous solution from a VIB metallic compound and / or a VIII metallic compound; and (3) dipping the alumina carrier obtained in the step (1) by using the solution prepared in the step (2), preheating an obtained wet catalyst in water-vapor-contained atmosphere, then, drying in air atmosphere, and then, roasting the catalyst to prepare the final catalyst. The hydro-demetalization catalyst prepared through the method disclosed by the invention is even in the distribution of active components and has higher activity and higher activity stability.

The invention discloses a preparation method and application of a non-sulphurized hydrodeoxygenation catalyst, and belongs to the technical field of catalyst synthesis. In order to solve the problems of the conventional hydrodeoxygenation catalyst, the invention provides the preparation method of the non-sulphurized hydrodeoxygenation catalyst with a unique porous structure. The preparation method comprises the following steps: firstly preparing an MIL-77 precursor solution, then adding heteropoly acid to obtain a mixed solution, then performing a hydrothermal reaction, and finally centrifuging, washing and drying to obtain an HPA@MIL-77 non-sulphurized hydrodeoxygenation catalyst which can be applied to a hydrodeoxygenation reaction of a model compound with phenol as bio-oil. The non-sulphurized hydrodeoxygenation catalyst prepared by the preparation method provided by the invention can be synthesized into the HPA@MIL-77 catalyst by a one-step method, and MIL-77 with high specific surface area can effectively control the HPA loading amount and regulate the acidity of the catalyst, so that improvement on the selectivity of a hydrodeoxygenation product is facilitated.

The invention discloses a glass etching solution. The glass etching solution is prepared from raw materials in percentage by weight as follows: 5%-15% of citric acid, 5%-15% of acetic acid, 20%-30% ofNH4F, 5%-10% of (NH4)2SiF6, 1%-5% of K2SiF6, 5%-15% of (NH4)2HPO4, 0.5%-1.5% of a viscosity regulator, 0.5%-1.5% of a surfactant and the balance of water. Meanwhile, the invention provides a corresponding preparation method of the glass etching solution and a method for preparing anti-glare glass with the glass etching solution. The glass etching solution has good stability and durability, and the prepared anti-glare glass is in the gloss 100-130 range required by vehicle mounting display, has the haze up to 6%-17% and the roughness of 0.040-0.065 mu m and has the performance superior to existing anti-glare glass.

The invention provides a process method for preparing ethyl tert-butyl ether. The process method comprises the following steps of: taking isobutene and ethanol as raw materials, and using a heteropoly acid / aluminum-based complex oxide catalyst, wherein the heteropoly acid / aluminum-based complex oxide catalyst takes a complex oxide as a carrier and takes heteropoly acid as an active component, the complex oxide is one or more of aluminum-based complex oxides in MgO-Al2O3, TiO2-Al2O3 and ZrO2-Al2O3, and the heteropoly acid is one or more of phosphotungstic acid, silicotungstic acid, arsenotungstic acid, germanotungtic acid, phosphomolybdic acid, silicomolybdic acid, arsenomolybdic acid, germanomolybdic acid and the like. According to the process method provided by the invention, the catalyst adopting the aluminum-based complex oxide to load the heteropoly acid is adopted, so that the shortcomings of inactivation of the catalyst and reduced conversion rate, which are caused by easiness in damaging the Keggin structure of the heteropoly acid of the heteropoly acid catalyst, easiness in loss of acid amount and difficulty in separation, can be overcome.

The invention discloses a regeneration method for a dehydrogenation catalyst. The dehydrogenation catalyst is a chromium-aluminum catalyst. The regeneration method comprises the following steps: subjecting the deactivated dehydrogenation catalyst to regeneration in the presence of gas containing oxygen, wherein regeneration temperature is 400 to 600 DEG C and regeneration time is 0.1 to 2.0 hours; then cooling the dehydrogenation catalyst to 100 to 250 DEG C; and treating the dehydrogenation catalyst with organic-acid-containing air and water vapor in a specific ratio for 0.1 to 4.0 hours. The method can remove carbon deposit and improve early activity and resistance to carbon deposition of the regenerated catalyst and enables properties of the regenerated catalyst like selectivity and stability to basically return to the level of a fresh catalyst.

The invention discloses a preparation method and application of a dual-functional hydrodeoxygenation catalyst, and belongs to the technical field of catalyst synthesis. The invention aims to solve the problems of the existing hydrodeoxygenation catalyst, and provides the preparation method for a non-sulphurized dual-functional hydrodeoxygenation catalyst. The preparation method comprises the following steps: first, preparing a flower-like Ni(OH)2 mixed solution; then, performing a hydrothermal reaction; next, adding the reaction product into an MIL-101 precursor solution and a heteropolyacid solution; finally, obtaining a flower-like Ni(OH)2-supported HPA@MIL-101 catalyst. The flower-like Ni(OH)2-supported HPA@MIL-101 catalyst can be applied to a hydrodeoxygenation reaction which takes phenol as a lignin-based phenol model compound. According to the dual-functional hydrodeoxygenation catalyst prepared with the preparation method, dual functions of the hydrodeoxygenation reaction can be realized, that is, the HPA@MIL-101 provides an acidic site, and the flower-like Ni(OH)2 provides metal activity, so that the synergistic effect can remarkably improve the hydrodeoxygenation activity and the selectivity of a target product.

The invention provides a method for preparing fruit vinegar from waste residues of column chromatography in momordica glycoside production and belongs to the technical field of fruit vinegar preparation. The method comprises the steps as follows: (1) white sugar, tea leaves and water are boiled together, natural cooling is performed, kombucha strain mother liquor and pellicle are added, sealing is performed with gauze, standing is performed, and a white pellicle is produced on the surface layer for later use; (2) glycoside-free momordica grosvenori juice is prepared by concentrating residues of column chromatography; (3) the concentrated juice is diluted with clear water; (4) the diluted juice is inoculated with the kombucha; (5) the inoculated diluted juice solution is placed in a shaking table for fermentation, and the sugar degree and pH are adjusted; (6) gauze covering is performed, filtration is performed after open fermentation, and the required fruit vinegar is obtained. With the adoption of the method, the problem of comprehensive utilization of waste residues of column chromatography in momordica glycoside production is solved, the economic benefit of an enterprise is increased, a new technology is added to the momordica grosvenori fermentation industry, the kind of kombucha fermented drinks is also enriched, and a novel healthcare drink which is healthy and beneficial to people is brought to people.

The invention discloses coconut vinegar and a preparation method thereof; the coconut vinegar is composed of coconut flesh, apple, grape seeds, honey, corn flour, glutinous rice and sugar as raw materials, can effectively reduce cholesterol, and has the multiple health efficacies of tonifying brain and nourishing blood, calming spirit and making sleeping peaceful, clearing liver-heat and removing heat, maintaining beauty and keeping young, invigorating spleen and replenishing qi, dispelling wind-evil, and dispersing toxins. The fermentation time and temperature are strictly controlled in the preparation process, so that the raw materials can be fully fermented in an optimum environment, so as to use the raw materials to the greatest extent and avoid waste.

The invention discloses a method for preparing desulfurizer capable of absorbing catalytic cracking gasoline at high selection, wherein catalyst is formed by loading the active components, such as nickel, cobalt and copper, on alkaline-metal modified silicon-aluminum composite carrier. The method for preparing the catalyst comprises two processes: the first process is to prepare the soluble precursor of each component and complexing agent as colloidal sol, dry, roast, form and process through hot water to obtain the catalyst; and the second process is to adopt the sol-gel method to prepare analkaline composite oxide carrier, then adopt a soaking method to introduce the first active component Ni and one of the second active components Co, Cu and Sn, finally process through the hot water to obtain the catalyst. The method has simple process, the large specific surface area of the catalyst is large, and the activity is stable. The method has advantages of high desulfurizing depth, good selection and little loss of octane value, so the method can be suitably applied to the desulfurization process of the catalytic cracking gasoline.

The invention belongs to the field of flower planting and particularly discloses a rhododendron lapponicum planting method. The method comprises steps including land selection, control of soil pH, hole digging, plantation, fertilization, management and the like. The problem that rhododendron lapponicum cannot be manually planted in batches because of freezing damage and pest and disease damage is solved through stereoscopic plantation of rhododendron lapponicum, cinnamomum camphora and tamarind pulp and application of water-absorbent resin, nitrogen dioxide and sulfur dioxide, and the economic benefits are improved to a large extent.

The invention discloses a non-precious metal catalyst for preparing synthesized liquefied petroleum gas and a preparation method of the non-precious metal catalyst. The non-precious metal catalyst comprises Ni, Cu and Hbeta molecular sieves. The preparation method includes preparing a mixed solution containing Cu and Ni, adding the mixed solution into Hbeta molecular sieve powder, performing stirring impregnation prior to ultrasonic impregnation, drying, roasting and forming so as to obtain the non-precious metal catalyst. The non-precious metal catalyst is applicable to the second stage of preparing the liquefied petroleum gas by a synthesis-gas two-step method and is high in selectivity and active stability as compared with a precious metal catalyst.

The invention discloses a catalyst modification method for improving a yield of hydrocarbons produced by catalytic pyrolysis of biomass, and belongs to the field of biomass resource conversion and utilization. The method comprises the following steps: 1, tabletting and molding a powdery HZSM-5 molecular sieve, then crushing and screening particles, 2, placing the HZSM-5 molded particles in a carrier gas atmosphere containing water vapor, and carrying out constant temperature treatment, and 3, calcining the HZSM-5 molded particles subjected to water vapor treatment in air at a constant temperature, and cooling to obtain the modified HZSM-5 catalyst. By adopting the technical scheme provided by the invention, the skeleton structure and acidity of the HZSM-5 catalyst can be adjusted, the catalytic performance of the HZSM-5 catalyst in biomass pyrolysis steam catalytic conversion reaction is improved, and compared with an unmodified HZSM-5 catalyst, the yield of hydrocarbon target productsin biomass catalytic pyrolysis reaction is effectively improved.

The invention discloses pearl plum fruit vinegar and a preparation method thereof, wherein the pearl plum fruit vinegar is prepared from pearl plum, apple, grape seeds, honey, corn flour, glutinous rice and sugar as raw materials; the pearl plum fruit vinegar is simple in preparation method, and not only tastes delicious but also is rich in nutrition; after people eat the vinegar, the vinegar can effectively reduce cholesterol, and has the multiple health efficacies of tonifying brain, nourishing blood, calming spirit, making sleeping peaceful, clearing liver-heat, removing heat, maintaining beauty, keeping young, helping produce saliva and slake thirst, inducing diuresis to alleviate edema and the like. The fermentation time and temperature are strictly controlled in the preparation process, so that the raw materials can be fully fermented in an optimal environment, so as to maximize utilization of the raw materials and avoid waste.

The invention discloses an acid soil conditioner based on tropical agricultural by-products. The acid soil conditioner is prepared from the following raw materials in parts by weight: 20-70 parts of biochar, 20-80 parts of an alkaline material, 1-5 parts of nano oxide and 120-180 parts of a glue solution. According to the soil conditioner, the sodium alginate glue solution is used, so that the powdery alkaline material is compounded with the granular charcoal, and runoff and infiltration of nutrients and alkaline materials along with rainwater are reduced; with the degradation of the glue, thecomposite amendment material can continuously and effectively neutralize soil acidity, improve soil structure and increase soil organic matter content, so that ideas and ways are provided for resource utilization of tropical agricultural by-products and soil fertility improvement in a hot area.

The invention discloses a preparation method and application of an aluminum monatomic catalyst. The preparation method comprises the following steps of: polymerizing styrene in an inner hole of an aluminum-based metal organic framework material adsorbing styrene under a heating condition, carrying out carbonization and fluorination, and then washing a fluorination product with hot ammonia water toobtain the aluminum monoatomic catalyst. The catalyst can be applied as a catalyst to dehydrohalogenation or fluorine-chlorine exchange reaction. The aluminum monatomic catalyst prepared by the invention has the advantages of simple preparation method, large specific surface area, high effective utilization rate of aluminum atoms, high catalytic performance, long service life and great application prospect.