843 results about "Liquid product" patented technology

The invention relates to the technical field of production line defect detection, in particular to an intelligent packaging production line defect detection method and system based on an image recognition model. The method comprises the following steps: carrying out packaging container surface defect analysis on an empty packaging container to generate a container inherent defect area; capturing a disturbance response time sequence image sequence based on the inherent defect area of the container after the liquid product packaging operation of the empty packaging container is completed; constructing a motion image recognition model, and performing motion area recognition on the disturbance response time sequence image sequence to obtain a time sequence motion area segmentation map; detecting internal and external impurity defects of the package according to the time sequence motion area segmentation map to obtain internal defect list data of the product; and when the product internal defect list data is non-empty, executing corresponding defective product removal control. High-precision intelligent identification of internal and external impurity defects of the liquid packaging product is realized through the image identification model, and the quality control level of a production line is remarkably improved.

The invention discloses a preparation method of a fly ash-Al-MOF material loaded with sodium percarbonate and acid-containing ferrous sulfate, which comprises the following steps: carrying out heat treatment on fly ash, cooling, adding into a sulfuric acid solution, stirring and mixing, carrying out solid-liquid separation, adding sodium hydroxide into a liquid product to adjust the pH value to 4.5-6 to obtain an aluminum hydroxide precipitate, washing and roasting to obtain aluminum oxide, and drying to obtain the fly ash-Al-MOF material loaded with sodium percarbonate and acid-containing ferrous sulfate. The preparation method comprises the following steps: mixing fly ash-Al-MOF with a sulfuric acid solution to obtain an aluminum sulfate solution, uniformly mixing the aluminum sulfate solution with a phthalic acid solution, carrying out solid-liquid separation, washing a solid product, carrying out freeze drying to obtain fly ash-Al-MOF, and respectively loading sodium percarbonate and acid-containing ferrous sulfate on the fly ash-Al-MOF to obtain fly ash-Al-MOF loaded with sodium percarbonate and fly ash-Al-MOF loaded with acid-containing ferrous sulfate; and uniformly mixing the two components to obtain a finished product. Compared with the existing method, the material prepared by the invention can realize long-term, stable, effective and environment-friendly remediation of the organic polluted soil, and the remediation efficiency is high.

A valve spring made of plastic, in particular for pretensioning a valve stem against a valve seat of a dispensing unit for dispensing a preferably liquid product, is proposed, wherein the valve spring has a plurality of spring elements arranged axially one behind the other, in particular along an axis or longitudinal axis. According to a first aspect, each spring element has two curved portions which are formed mirror-symmetrically with respect to one another and are connected to one another at their ends. According to a further aspect, the valve spring has a leaf-spring-like or cup-spring-like construction.

The invention discloses a Pt-loaded hierarchical pore HY molecular sieve double-effect catalyst and a preparation method and application thereof.The preparation method comprises the steps that firstly, an acid solution and an HY molecular sieve are mixed, heated and stirred, and the hierarchical pore HY molecular sieve is obtained; then, Pt salt is loaded on the hierarchical pore HY molecular sieve through an impregnation method, and the hierarchical pore HY molecular sieve is dried, calcined and then reduced. The concentration of the acid solution is not higher than 0.1 mol / L; the catalyst is used for hydrocracking of polyethylene or polypropylene. According to the Pt-loaded hierarchical pore HY molecular sieve double-effect catalyst disclosed by the invention, Pt atoms have excellent C-H bond activation capability, meanwhile, the hierarchical pore HY molecular sieve carrier has an open connection mesoporous structure and an acid site, and the mesoporous structure constructed by acid pickling and dealumination is beneficial to diffusion of a reaction intermediate and improvement of the yield of a liquid product; more orifice acid can be exposed by surface erosion, so that the initial cracking of reaction raw materials is facilitated, and the catalytic performance is improved.

The invention discloses a method for preparing 12-mercaptan through solid organic acid catalysis, belongs to the technical field of 12-mercaptan preparation, and aims to solve the problems of low catalyst activity, harsh reaction conditions, serious pollution, high cost and dependence on import in the prior art. N-dodecanol and hydrogen sulfide are used as raw materials and are mixed according to the molar ratio of 1: 1.2-1: 1.3; the method comprises the following steps: gasifying n-dodecanol, mixing with purified hydrogen sulfide, preheating to 210-240 DEG C, introducing into a fixed bed reactor filled with a solid organic acid catalyst, and reacting at-0.08-3.0 MPa for 3.5-4 hours; and cooling and condensing the reaction product, carrying out gas-liquid separation, rectifying and purifying the liquid product to obtain 12-mercaptan with the purity of more than or equal to 99.5%, and recycling unreacted hydrogen sulfide. The solid organic acid can be a catalyst of p-toluenesulfonic acid and the like or mesoporous silica loaded nickel, cobalt and molybdenum metal oxides. The method has the advantages of high catalytic activity, mild reaction conditions, high product yield (the conversion rate of n-dodecanol is greater than or equal to 94.5%), environmental protection and low cost, can realize the domestic mass production of 12-mercaptan, and meets the market demand.

The utility model belongs to the technical field of sugar alcohol preparation, and relates to a system for co-producing L-arabinose and caramel pigment by using xylose chromatography raffinate, which comprises a raw material tank, a nanofiltration membrane separator, a chromatography separation device, an evaporation concentration tank, a crystallization tank, a centrifugal separator and a dryer which are sequentially communicated by pipelines, and the browning reaction assembly is used for mixing the raffinate and the centrifugal mother liquor and then carrying out browning reaction treatment to prepare caramel pigment. The chromatographic separation device is used for separating an extracting solution and raffinate from the flowing nanofiltration permeate, the evaporation concentration tank and the crystallizing tank are used for concentrating and crystallizing the flowing extracting solution into massecuite, the centrifugal separator is used for separating the flowing massecuite into moist sugar and centrifugal mother liquor, and the dryer is used for drying the flowing moist sugar into L-arabinose crystals. According to the utility model, raffinate and centrifugal mother liquor are mixed to prepare a caramel pigment liquid product, so that a caramel pigment additional product is obtained while the utilization rate of saccharide resources is improved.

The invention discloses a low-staining low-viscosity waterborne polyurethane macromolecular coloring agent and a preparation method of the low-staining low-viscosity waterborne polyurethane macromolecular coloring agent. Comprising the following components in parts by weight: 15 to 30 parts of aliphatic diisocyanate, 15 to 30 parts of micromolecular dye, 10 to 30 parts of polypropylene glycol and / or dihydroxy silicone oil, 25 to 50 parts of polyethylene glycol, 1 to 3 parts of micromolecular dihydroxy compound chain extender, 0.05 to 0.3 part of catalyst, 90 to 140 parts of acetone and 50 to 300 parts of water. By designing the hydrophilicity and proportion of the soft and hard segments of the polyurethane coloring agent, the waterborne polyurethane macromolecular coloring agent color paste which is low in staining, easy to clean, less than 1000mpas in product viscosity, more than 5% in color concentration and more than 5% in dye equivalent and good in compatibility is finally obtained, and the waterborne polyurethane macromolecular coloring agent color paste can meet the requirements of liquid product coloring agents such as clothing care and household cleaning agents. The cleaning agent can also be used for liquid cleaning agent products for body care and catering.

The invention discloses a composition for improving the stability of oleuropein in a solution as well as a preparation method and application of the composition. The composition comprises oleuropein and at least one stabilizer, and the stabilizer is selected from the group consisting of anisic acid, lactobionic acid, glycyrrhizic acid, 3, 3-thiodipropionic acid, N-acetyl-L-glutamine, propyl-cysteine and lauramidopropyl betaine; and the pH value of the aqueous solution of the composition is 4.0-8.0. The preparation method comprises the following steps: dissolving oleuropein in water, adding the stabilizer, and uniformly mixing. Through simple physical mixing, by utilizing the synergistic effect of the specific stabilizer and the oleuropein, the degradation and discoloration of the oleuropein in the storage process are remarkably inhibited. Experiments show that after the preferable composition is preserved for 30 days in an open manner, the retention rate of the oleuropein still reaches up to 80% or above, and is far superior to that of blank control and a traditional liposome wrapping method. The composition is simple and convenient in preparation process and low in cost, and provides reliable technical support for wide application of oleuropein in liquid products such as food, medicine and cosmetics.

A product delivery system includes a product transport vehicle having at least a plurality of tank compartments, internal valves, control valves, fluid property sensors, temperature sensors, overfill sensors, pressure sensors, a system controller, and a memory module. The product delivery system may be operable to communicatively connect with the loading system at a loading station, a fleet management system, or a cloud system to obtain information, such as the amount of liquid product to be loaded into a tank compartment. The product delivery system may be operable to compare the volumes of the tank compartments with the amounts of liquid product to be loaded at a loading station and maintain the internal valve or control valve in a locked state or transition the internal valve or control valve to an unlocked state based on the comparison. Other comparisons based on liquid type or distribution tank volume can also be made.

A method for recovering polyol from a polyurethane waste material comprises the following steps: degrading the polyurethane waste material by using a degradation agent, and then removing the degradation agent to obtain a degradation product; reacting the treating agent as shown in the formula (I) with the degradation product to obtain a reaction solution containing a reaction product and a polyhydric alcohol compound; and distilling the reaction liquid to remove the unreacted treating agent and obtain a polyol mixture. The degradation product contains an amine compound and a polyhydric alcohol compound. The reaction product is formed by reaction of an amine compound and a treating agent, and the reaction product is in a liquid state at 20-40 DEG C. According to the method disclosed by the invention, the amine compound in the degradation product can react to generate a liquid product which does not affect subsequent treatment, and the unreacted treating agent can be removed or recycled in a distillation manner to obtain a high-purity polyol mixture.

The present application relates to the field of liquid product storage technology, and more particularly to a method and device for calculating the size of spacer elements in liquid product storage facilities. The calculation method of the present application takes the minimum overall size of all spacer elements into consideration, and at the same time takes the minimum cost of the usage of spacer elements and mastic as the optimization goal, constructs a first objective function, and then solves the objective function with the flatness and distortion requirements of the storage tank as constraints, and finally obtains the size of the spacer elements at each point. The storage facility is implemented based on the size of the spacer elements, which can make the overall construction cost lower. Furthermore, considering the flatness and distortion requirements of the storage tank, multiple objective functions are further set. By solving multiple objective functions, the size of the spacer elements at each point is obtained, which makes the overall preparation cost of the storage facility the lowest, and at the same time, the flatness of the storage tank can meet the engineering requirements.

The invention relates to the technical field of polyolefin degradation, in particular to an EMT / FAU eutectic molecular sieve catalyst and a preparation method and application thereof. The EMT / FAU eutectic molecular sieve catalyst is obtained by physically mixing an acidic molecular sieve and a Pt-loaded TS-1 molecular sieve, and the mass ratio of the acidic molecular sieve to the Pt-loaded TS-1 molecular sieve is 1: 1. The method comprises the following steps: carrying out ammonium ion exchange on an EMT / FAU eutectic molecular sieve to obtain an acidic molecular sieve; pt is packaged by using a TS-1 molecular sieve so as to provide abundant metal hydrogenation sites; an acid site-metal series system is constructed through an acid molecular sieve and a Pt-loaded TS-1 molecular sieve, polyethylene can be converted into short-chain alkane under a mild condition, liquid products are distributed more intensively, and the problems that an existing molecular sieve catalyst is too high in hydrogen pressure in a polyethylene hydrocracking reaction, and the reaction time is shortened are solved. The energy consumption is high; and reaction products are not distributed intensively.

The invention belongs to the technical field of solid waste resource utilization, and particularly relates to a production process for producing low-sulfur marine fuel oil through waste rubber tire hydro-liquefaction, which comprises the following steps: (1) mixing oil slurry, waste tire rubber powder and a catalyst to obtain a mixture, enabling the mixture to pass through a swelling preheater, and enabling the mixture and hydrogen to enter a slurry bed reactor for hydro-liquefaction, the liquefied intermediate product passes through a high-pressure separator, hydrogen obtained through separation enters a fixed bed hydrofining device, and obtained liquid enters a rectifying tower through a pressure reducing valve; (2) feeding a liquid product at the bottom of the rectifying tower and hydrogen into a fixed bed hydrofining device; and (3) carrying out gas-liquid separation on the fixed bed hydrofining product, wherein the liquid obtained by the gas-liquid separation is the low-sulfur marine fuel oil. According to the invention, waste tire rubber powder and slurry oil are used as raw materials, the liquefaction of waste rubber tires is realized in high-pressure hydrogen and high-temperature environments, and a fixed bed hydrofining device is combined to further reduce the content of sulfur atoms so as to produce the low-sulfur fuel oil for ships.

A discharge system for bulk tank trailers unloads dry bulk material from a bulk product trailer that is configured to be pulled by a vehicle. The discharge system includes a centrifugal compressor, a drive mechanism and a speed increaser. The centrifugal compressor is configured to deliver compressed air to force the dry bulk material from the bulk product trailer and convey the dry bulk material to a storage tank. The drive mechanism furnished rotational motion to the centrifugal compressor (e.g., via a power take-off of the vehicle). The speed increaser is disposed between the centrifugal compressor and the drive mechanism and is configured to increase the speed of the rotational motion furnished by the drive mechanism to the speed compressor. The drive mechanism may include a hydraulic system configured to drive a liquid product pump for pumping liquid product from a liquid product storage tank trailer pulled by the vehicle.

The invention relates to the field of waste catalyst recovery, and discloses a method for recovering molybdenum from a waste hydrofining catalyst. The method comprises the following steps: (1) roasting the molybdenum-containing waste hydrofining catalyst in an inert atmosphere; (2) carrying out contact reaction on the roasted product obtained in the step (1) and an alkali solution, and then carrying out microwave treatment under the power of 300-900W to obtain a liquid product; and (3) evaporating and concentrating the liquid product under the condition that the pH value is 10-12 to obtain molybdate crystals. The method can obviously improve the recovery rate of molybdenum.

The invention relates to the technical field of lignin separation and catalytic conversion, in particular to a method for separation and in-situ catalytic conversion of lignin in woody biomass, which comprises the following steps: (1) mixing the woody biomass, a catalyst and a reaction solvent, and performing catalytic reaction to obtain a liquid product and a solid product; wherein the catalyst comprises a tungsten element, a phosphorus element and a carrier; (2) evaporating the liquid product to obtain a reaction product and a regenerated solvent; and (3) contacting the reaction product with an extraction agent for extraction to obtain an oil-phase product containing the phenolic monomer and a water-phase product containing the saccharide derivative. According to the method provided by the invention, the lignin in the woody biomass can be converted into the monophenol aromatic compound with high selectivity, and multi-stage and high-value utilization of the biomass can be realized.

A method for catalytically degrading polyolefin plastics at a low temperature is provided. The method uses NaCl—KCl—AlCl3 molten salt as the catalyst and adds KHCO3 as an additive. Without adding organic solvents, the polyolefin plastics are successfully degraded at a reaction temperature of 90-100° C. The mass recovery rate of degraded polyolefin plastics is more than 99%, and the selectivity of gaseous and liquid products is both more than 90%. The mass recovery rate of the molten salt catalyst was more than 97% after 5 cycles. The molten salt catalysts of the present disclosure can effectively reduce the temperature of the catalytic reaction, and improve its degradation rate and selectivity, solving the technical problems of low conversion efficiency, high cost, and difficulty in catalyst recycling existing in the degradation of the polyolefin plastics, and realizing high efficiency, high selectivity, low cost, and low energy consumption in the polyolefin plastic degradation.

A slurry reactor system including a slurry reactor configured to convert, under slurry hydroconversion conditions, a slurry reactor content flowing upwards and containing a feedstock including one or more of fats, oils and greases, a slurry hydroconversion catalyst and a hydrogen stream to a slurry hydroconversion effluent containing a slurry phase effluent including catalyst particles and a liquid product and a vapor phase effluent including a hydroconversion product, and one or more separation units in fluid communication with the slurry reactor to receive the slurry hydroconversion effluent. A given one of the one or more separation units is configured to separate the slurry phase effluent from the vapor phase effluent.

The invention relates to the technical field of anti-adhesion packaging material research and development, and discloses an anti-adhesion liquid packaging film and a preparation process thereof, and the preparation process comprises the following steps: synthesizing an octa-cyclohexyl double-layer cyclic siloxane monomer, carrying out an addition reaction on a Si-H bond of the octa-cyclohexyl double-layer cyclic siloxane monomer and an alkenyl functional group of an allyl silane coupling agent to obtain an octa-cyclohexyl double-layer cyclic siloxane monomer; preparing to obtain an organic-inorganic hybrid type connecting agent; the preparation method comprises the following steps: carrying out modification treatment on hydroxylated silicon dioxide nanoparticles through an organic-inorganic hybrid connecting agent, and then dispersing the modified hydroxylated silicon dioxide nanoparticles in a PE-SILICON-PE block copolymer matrix to prepare the anti-adhesion composite material. A film structure of a nine-layer co-extrusion film is arranged, an anti-adhesion composite material is introduced into a first layer and a ninth layer of the nine-layer co-extrusion film, a nine-layer co-extrusion blow molding film forming technology is adopted, the packaging film with the excellent anti-adhesion performance is prepared, and the packaging film can be applied to the field of packaging of non-Newtonian liquid products.

The invention relates to the technical field of waste recycling, and particularly discloses a method for preparing humus by subcritical hydrolysis of waste mushroom sticks, which comprises the following steps: adding mushroom stick powder into alkali liquor or acid liquor, adding H2O2 and FeSO4, adding ethylenediamine tetraacetic acid under an alkaline condition, and uniformly stirring to form a mixture; transferring the mixture into a high-pressure reaction kettle, reacting for a period of time at normal temperature, and then carrying out subcritical hydrothermal reaction to obtain a product 1; continuing to decay the product 1 and then carrying out suction filtration and solid-liquid separation to obtain a humus-containing liquid product. According to the method, the waste mushroom sticks are subjected to subcritical hydrolysis treatment to prepare the humus, the hydrolysis efficiency of the mushroom sticks is remarkably improved, and the hydrolysis rate reaches 80% or above. In addition, the temperature of the whole hydrothermal reaction is lower than that of a traditional pyrolysis or chemical oxidation process, energy consumption is greatly reduced, meanwhile, damage of high-temperature treatment to the humic acid structure is avoided, and the functionality of the product is effectively protected.

A slurry reactor system including a slurry reactor configured to convert, under slurry hydroconversion conditions, a slurry reactor content flowing upwards and containing a feedstock including one or more of fats, oils and greases, a slurry hydroconversion catalyst and a hydrogen stream to a slurry hydroconversion effluent containing a slurry phase effluent including catalyst particles and a liquid product and a vapor phase effluent including a hydroconversion product, and a separation unit internal to the slurry reactor, the separation unit being configured to separate at least a portion of the vapor phase effluent from the slurry hydroconversion effluent to produce a mixture of vapor and the slurry hydroconversion effluent having a reduced vapor phase content. The separation unit is configured to use a pump to recirculate the mixture of vapor and the slurry hydroconversion effluent flowing downwards in the slurry reactor to be combined with the slurry reactor content.

The invention relates to a method for preparing a gasoline component and an aviation fuel component through ethylene oligomerization, which comprises the following steps: contacting an ethylene-containing raw material with a first catalyst to carry out a first oligomerization reaction to obtain a first oligomerization product; the first catalyst comprises an FER structure molecular sieve; contacting the first oligomerization product with a second catalyst filled in the fixed bed reactor to carry out a second oligomerization reaction so as to obtain a second oligomerization product; the second catalyst is a molecular sieve catalyst and / or an amorphous silica-alumina catalyst; carrying out gas-liquid separation on the second oligomerization product to obtain a gas product and a liquid product, and carrying out distillation separation on the liquid product to obtain a C5-C9 fraction and a C9 + fraction; according to the method provided by the invention, the ethylene conversion rate is high, and the yield of C9 < + > fraction in the liquid product can be obviously improved.

The invention belongs to the technical field of anti-freezing solutions, particularly relates to an anti-freezing cooling liquid and a preparation method and application thereof, and provides an all-organic heat transfer system anti-freezing cooling liquid which contains efficient all-organic adsorption acid and an anti-corrosion inhibition additive, has better anti-corrosion and anti-rust capabilities on various metals, and has a good anti-freezing effect. And the anti-corrosion agent has excellent anti-rust function for soldering tin, cast aluminum, cast iron, steel, brass, red copper and the like, especially the anti-corrosion performance of a wet cylinder sleeve of a heavy-duty vehicle. The lubricating oil has excellent cavitation erosion resistance and pitting corrosion resistance, and has an excellent protection effect on an engine cooling system. The anti-freezing cooling liquid product is free of precipitates, stable in performance, safe, non-toxic, green and environment-friendly.

The invention belongs to the field of coal and oil and gas resource development, and particularly discloses an in-situ mining simulation experiment method and device for microwave fragmentation and pyrolysis of oil-rich coal, and the method comprises the following steps: S1) processing and manufacturing an oil-rich coal sample or a coal rock combination; s2) putting the sample into a sealed wave-transparent reaction chamber of a microwave irradiation cabin, and simulating the stress state of the coal seam through a microwave wave-transparent pressure head by utilizing a servo control device; s3) simulating a coal bed gas environment through gas injection of an atmosphere device; s4) carrying out microwave irradiation and collecting a pyrolysis gas-liquid product, and meanwhile, obtaining experimental data in the irradiation process; and S5) cleaning and dissolving the pyrolysis liquid product to obtain the tar quality and analyze the components of the tar, screening the sample to obtain a grain composition curve, comparing the calorific values of the coal sample before and after the experiment, and evaluating the effects of microwave fragmentation pyrolysis of the coal sample and oil gas extraction by combining experimental data. Quantitative reference and basis can be provided for selection of microwave conditions in microwave-assisted in-situ mining.

A slurry reactor system including a slurry reactor configured to convert, under slurry hydroconversion conditions, a slurry reactor content flowing upwards and containing a feedstock including one or more of fats, oils and greases, a slurry hydroconversion catalyst and a hydrogen stream to a slurry hydroconversion effluent containing a slurry phase effluent including catalyst particles and a liquid product and a vapor phase effluent including a hydroconversion product, and a separation unit external to the slurry reactor to separate the slurry phase effluent from the vapor phase effluent to produce a recycled slurry stream. An inlet of the separation unit is in fluid communication with an outlet of the slurry reactor to receive the slurry hydroconversion effluent from the slurry reactor and an outlet of the separation unit is in fluid communication with an inlet of the slurry reactor to receive the recycled slurry stream from the separation unit.

The invention discloses an anti-fouling and anti-corrosion integrated coating with long-acting, high-adhesion and super-smooth functions as well as a preparation method and application of the anti-fouling and anti-corrosion integrated coating, and belongs to the field of preparation of marine anti-fouling and super-smooth coating materials. The preparation method comprises the following steps: preparing a high-adhesion epoxy resin precursor to obtain a liquid product EGDE-PCA; the preparation method comprises the following steps: preparing a high-adhesion and super-lubricity integrated epoxy resin precursor to obtain an oily liquid product EGDE-PCA / APT-PDMS; the preparation method comprises the following steps: adding EGDE-PCA / APT-PDMS into isophorone diamine, uniformly mixing and stirring, coating a metal material sample with the mixture, and carrying out a drying and curing reaction under a vacuum heat preservation condition, so as to obtain the antifouling and anticorrosive integrated coating with long-acting high-adhesion and super-lubricity functions. In the early-stage synthesis reaction, an organic solvent does not need to be added, so that the environmental protection property is improved, and the problem that the construction process is difficult due to poor flowability is solved; the coating provided by the invention has super-smooth durability and excellent antifouling and anticorrosion effects.

The invention discloses a method for continuously producing ethylene glycol from ethylene, which comprises the following steps: adding a zinc modified titanium silicalite molecular sieve catalyst and a solvent into a reactor, continuously adding ethylene and a hydrogen peroxide solution into the reactor to carry out gas-solid-liquid three-phase reaction, installing a filter membrane inside the reactor, and after the reaction is carried out, adding a catalyst and a solvent into the reactor, and adjusting the internal and external pressure difference of the reactor, separating the liquid product from the solid catalyst in the reactor through the filter membrane, and discharging the liquid product to obtain the ethylene glycol product. According to the method, the pressure difference inside and outside the reactor is adjusted, the liquid product and the solid catalyst can be separated in the reactor without opening the reaction kettle by installing the special filter membrane in the reactor, and the liquid product separated by the filter membrane can be directly analyzed without further treatment, so that the separation efficiency is improved. And long-period continuous evaluation can be realized.

The invention discloses a method for extracting lithium from spodumene smelting slag, which relates to the technical field of lithium slag solid waste recovery. The method comprises the following steps: S1: mixing lithium slag, fluoride and sulfuric acid to obtain a mixed solution; S2: heating and stirring the mixed solution, and then performing solid-liquid separation to obtain solid product leaching slag and liquid product leaching solution; S3: purifying and removing impurities, evaporating and concentrating, precipitating lithium, filtering, washing and drying the leaching solution in sequence to obtain a lithium carbonate product. The method realizes efficient leaching of lithium from spodumene smelting slag by adding fluoride as a leaching aid, and the process does not require high-temperature heat treatment, has a simple process and low production cost.

The invention discloses an in-situ crystallization high zeolite waste plastic catalytic cracking microsphere catalyst as well as a preparation method and application thereof, and belongs to the technical field of catalyst materials. Carrying out spray drying on mixed slurry consisting of clay, an external silicon source, the pre-crystallization liquid and water to obtain microspheres; the preparation method comprises the following steps: preparing microspheres, roasting the microspheres, mixing the roasted microspheres with an alkali-containing aqueous solution and a template agent to obtain a mixture, carrying out hydrothermal crystallization, filtration and separation on the mixture, adding a phosphorus compound and a metal compound into a product obtained after hydrothermal crystallization, uniformly mixing, and carrying out drying and roasting treatment to obtain the in-situ crystallization high-zeolite waste plastic catalytic cracking microsphere catalyst. The in-situ crystallization nanocrystallization ZSM-5 catalyst is high in zeolite content and developed in mesopores, and the molecular sieve and the matrix are tightly combined through similar chemical bonds, so that the activity stability of the catalyst is enhanced; the catalyst is used for catalytic cracking reaction of waste plastics, is high in reaction activity and long in service life, greatly improves the yields of ethylene, propylene and butylene, and is rich in aromatic hydrocarbons in liquid products.

The present invention provides a hydrocracking catalyst and a preparation method and application thereof, the catalyst comprises a carrier and hydrogenation active metal components, the carrier comprises alumina and carbon, and the hydrogenation active metal components comprise one or more of VIB group metals and one or more of VIII group metals in the periodic table of elements; the total acid content of the catalyst is 0.45-0.80 mmol / g, the dispersity of the VIB group metal is not lower than 0.08, and the dispersity of the VIII group metal is not lower than 0.04; preferably, the total acid content of the catalyst is 0.50-0.70 mmol / g, the dispersity of the VIB group metal is not lower than 0.09, and the dispersity of the VIII group metal is not lower than 0.05. According to the preparation method, an aluminum oxide-carbon composite material is synthesized in situ, then the composite material is subjected to surface modification treatment, and then an active metal component is introduced, so that the obtained hydrocracking catalyst has proper acidity and good metal dispersibility, and when the hydrocracking catalyst is applied to a hydrocracking process of waste plastics, moderate cracking hydrogenation of the waste plastics can be realized; the yield of a liquid phase product is effectively improved.