162 results about "Ammonium chloride" patented technology

The invention provides a modified chitosan flocculant for slime water treatment. The modified chitosan flocculant is prepared from the following raw materials: chitosan, dimethyl diallyl ammonium chloride, acrylamide, acetic acid and potassium persulfate. The invention also provides a preparation method of the modified chitosan flocculant for slime water treatment. The preparation method comprises the following steps: dissolving chitosan in a dilute acetic acid solution with the mass concentration of 60%, and stirring; adding acrylamide and dimethyl propyl chloride cyclic amine into the mixed solution, uniformly stirring, adding a potassium persulfate solution with the mass concentration of 4%, and introducing nitrogen for 20 minutes; then carrying out microwave reaction, and cooling to room temperature after the reaction is completed; adding absolute ethyl alcohol, centrifuging for 10 minutes, taking out, and continuously soaking in absolute ethyl alcohol for 12 hours, so as to obtain a final insoluble substance which is a graft polymer CS-g-ADM; and drying the polymer in a drying box at 105 DEG C until no weight loss occurs, and then grinding and storing. The flocculating agent disclosed by the invention has relatively good flocculability.

The invention relates to nano alpha-aluminum oxide and a preparation method thereof, and belongs to the technical field of new materials. The preparation method of the nano alpha-aluminum oxide comprises the following steps: S1, fully mixing aluminum stone powder and ultrapure water, and standing to obtain a pre-solution; s2, a dispersing agent and seed crystals are added into the pre-solution for ball milling, and a mixture is obtained; s3, carrying out jet hedging atomization on the mixture, carrying out spray drying, and calcining to obtain nano alpha-aluminum oxide; the dispersing agent is one or more of polyethylene glycol, polypropylene ketone, dodecyl trimethyl ammonium chloride and octadecyl dimethyl hydroxyethyl ammonium perchlorate. The alpha-aluminum oxide produced by the method is high-purity spherical nanoscale particles which are easy to disperse, the particle size is 100-200nm, the particle size distribution is uniform and concentrated, and the alpha-aluminum oxide is easy to disperse. The prepared nano alpha-alumina powder is easy to process and utilize, and can be directly applied to the fields of polishing materials, additives, ceramic materials, carrier materials and the like.

The invention discloses a gradient chelation-free radical activation synergistic eucalyptus chemithermomechanical pulp wastewater composite coagulant and a preparation method thereof, and belongs to the technical field of eucalyptus chemithermomechanical pulp wastewater treatment. Ferrous sulfate heptahydrate, aluminum hydroxide and magnesium sulfate are used as raw materials, and the water purifying agent with the viscosity of 35-45 mPa.s is prepared through gradient chelation reaction, free radical activating treatment, functional component composite reaction, pH and specific gravity regulation and control and curing treatment. By utilizing the synergistic effect of the polydimethyldiallylammonium chloride and the formaldehyde dicyandiamide resin, the electric neutralization capability on macromolecular colloidal substances in the wastewater is remarkably enhanced, and macromolecular substances which are difficult to biodegrade in the water are effectively removed; when the compound coagulant is used for treating the eucalyptus chemithermomechanical pulp wastewater, the addition amount of the compound coagulant is small, and the compound coagulant has excellent COD (Chemical Oxygen Demand) reduction and decolorization effects.

The invention relates to the field of flame retardants, and particularly discloses a flame retardant for an EVA material and a preparation method of the flame retardant. The invention relates to a flame retardant for an EVA material. The flame retardant is prepared from the following raw materials in percentage by weight: 30-40% of an organic nitrogen flame retardant, 45-55% of a phosphorus flame retardant, 10-15% of an intumescent flame retardant and the balance of modified montmorillonite, the modified montmorillonite is prepared from montmorillonite, methacryloyloxyethyl trimethyl ammonium chloride, a polymethyl vinyl ether / maleic anhydride copolymer, a silane coupling agent, a dispersing agent and an activating agent; the preparation method comprises the following steps: grinding the organic nitrogen flame retardant, the phosphorus flame retardant and the intumescent flame retardant, and stirring and dispersing with the modified montmorillonite; the preparation process is simple, the usage amount of the prepared flame retardant in the EVA material is small, and the flame retardant has good flame-retardant stability and does not affect the mechanical property of the EVA material.

The invention discloses a preparation method of a composite flocculant based on efficient water treatment, belongs to the technical field of flocculant processing, and aims to solve the technical problem that the flocculation performance and the settling performance of a flocculant need to be further improved in the prior art. The preparation method specifically comprises the following steps: putting acrylamide, diallyldimethylammonium chloride, 2-hydroxypropyl methacrylate and deionized water into a reaction kettle, and uniformly mixing to obtain a mixed monomer; according to the preparation method, citric acid monohydrate and iron nitrate nonahydrate react under a mild acidic condition to form a Fe < 3 + >-citric acid complex, and then 2-hydroxyethylamine is introduced to further participate in complexing to obtain a citric acid complexing solution, so that not only is the flocculation performance of the composite flocculant improved, but also the settling performance of the composite flocculant is improved.

The invention discloses a production process of an efficient polyaluminum chloride-based composite flocculant, which includes adding tourmaline into ethanol for low-temperature ball milling treatment to obtain tourmaline fine powder; performing low-temperature grinding treatment on vermiculite, then successively adding tourmaline, aluminum isopropoxide and trichloromethylsilane and stirring, and obtaining a prefabricated vermiculite carrier after dispersion and granulation; standing the prefabricated vermiculite carrier for 1-2 h, then standing at a constant temperature for 3-5 h, then soaking it in an alkali solution for 20-30 min, performing ultrasonic treatment for 5-10 min, filtering and sintering to obtain porous mixed vermiculite; mixing dimethyldiallylammonium chloride and polyaluminum chloride evenly, then putting them into the porous mixed vermiculite and stirring evenly, then performing microwave oscillation treatment for 1-2 h, taking out the porous mixed vermiculite particles, which are the prefabricated flocculant; standing the prefabricated flocculant for 1-2 h, and obtaining an efficient flocculant after freeze-drying. The invention utilizes vermiculite to improve the sedimentation characteristics of the flocculant, combines with the negative ion adsorption of tourmaline, aggregates the flocs of dimethyldiallylammonium chloride and polyaluminum chloride, reduces the dispersion problem of the flocs, and achieves the balance of adsorption, sedimentation and flocculation.

The invention provides modified activated carbon for removing perchlorate in water of a sheep farm and a preparation method of the modified activated carbon, and relates to the field of water treatment.The method comprises the steps that activated carbon reacts in a citric acid aqueous solution, a carboxyl layer is evenly loaded on the surface of the activated carbon, and preliminarily modified activated carbon is obtained; reacting the primarily modified activated carbon in an alkaline polydimethyldiallylammonium chloride aqueous solution, and adsorbing strong cation quaternary ammonium salt on the surface of a carboxyl layer through electrostatic interaction to obtain re-modified activated carbon; the activated carbon modified again reacts in a triethylene tetramine aqueous solution, triethylene tetramine molecules are further combined to the strong cation quaternary ammonium salt through the electrostatic adsorption effect, the modified activated carbon for removing perchlorate in the water of the sheep farm is obtained, the adsorption capacity of the activated carbon to negatively charged solutes is remarkably enhanced, and the perchlorate in the water of the sheep farm is removed. The perchlorate treatment efficiency of the whole farm environment is improved.

The invention discloses a modified vinasse biochar-based nitrogen fertilizer and a preparation method and application thereof, and the preparation method comprises the following steps: (1) drying and crushing vinasse to obtain vinasse particles; (2) mixing and dipping the vinasse particles and a phosphoric acid solution, and then drying to obtain modified vinasse; (3) under a protective atmosphere, pyrolyzing the modified vinasse to obtain modified charcoal; (4) adding an ammonium chloride solution into the modified biochar, adjusting the pH value, heating and oscillating, then taking out the modified biochar after adsorption, and drying to obtain the modified vinasse biochar-based nitrogen fertilizer. The prepared modified vinasse biochar-based nitrogen fertilizer is applied to the field of chemical fertilizer preparation, resource utilization of a wine brewing byproduct vinasse is achieved, the risk of environmental pollution is reduced, the vinasse is made into the biochar-loaded nitrogen fertilizer, technical reference is provided for effective utilization of the nitrogen fertilizer, and the modified vinasse biochar-based nitrogen fertilizer has practical significance in promotion of industrial green cycle development.

The invention provides porous calcium silicate and a preparation method thereof. The preparation method comprises the following steps: providing a high-modulus water glass solution as a silicon source, providing lime milk as a calcium source, adding dodecyl trimethyl ammonium chloride and citric acid betaine to obtain a mixed solution, heating the mixed solution, and carrying out a synthetic reaction with lime to obtain calcium silicate slurry; carrying out pressure filtration on the calcium silicate slurry to obtain a crude calcium silicate filter cake; adding water and pulping to obtain slurry, heating the slurry, adding a dealkalizing agent, keeping the temperature at 90-95 DEG C, and carrying out dealkalization reaction to generate dealkalized calcium silicate slurry; and carrying out solid-liquid separation on the alkali-treated calcium silicate slurry to obtain a calcium silicate filter cake, drying and scattering to obtain the finished product porous calcium silicate. The specific surface area of the porous calcium silicate is obviously increased.

The invention discloses a plant ash loaded cation modified chitosan-polyacrylamide efficient sludge dehydrating agent as well as a preparation method and application thereof, and belongs to the technical field of sludge dehydration. The preparation method of the efficient sludge dehydrating agent comprises the following steps: firstly, carrying out cationic grafting modification on chitosan by adopting dimethyl diallyl ammonium chloride, and then introducing the cationic grafting modified chitosan and polyacrylamide into the surface of plant ash, so that the surface of the plant ash is obviously changed; and a discontinuous, multi-gap, disordered and irregular multi-layer structure is presented. The specific surface area of the plant ash is increased by introducing the cationic grafting modified chitosan and the polyacrylamide, and the complex surface structure is beneficial for the plant ash to generate gaps which are difficult to compress in a sludge filter cake in the sludge dewatering process, so that the dewatering performance of the sludge is improved.

The invention relates to the field of oilfield drilling, and particularly discloses a salt-resistant thickening agent for fracturing and a preparation process thereof, and the preparation process comprises the following steps: firstly performing intercalation modification on bentonite, and then performing mixed modification treatment on PAMAM, acrylic acid and sodium vinylsulfonate to obtain sulfonated bentonite; the preparation method comprises the following steps: taking acryloyloxyethyl trimethyl ammonium chloride, 2-acrylamide-2-methylpropanesulfonic acid, acrylamide and allyl polyoxyethylene ether as basic monomers to prepare a basic monomer mixed solution; and adding sulfonated bentonite into the basic monomer mixed solution, stirring, reacting and preserving heat under the protection of inert gas and the action of an initiator to obtain a colloidal solution, and drying to obtain the salt-resistant thickening agent. The invention further discloses the salt-resistant thickening agent for fracturing, which is prepared by adopting the preparation process. The preparation method has the characteristic that the thickening agent which is good in salt resistance and can still keep excellent shear stability under a high-temperature condition is prepared.

This invention discloses a cationic etherifying agent and its preparation method, belonging to the field of cationic etherifying agent production technology. The preparation method includes: continuously feeding trimethylamine and hydrochloric acid into a raw material pretreatment unit, pre-cooling to -10~20℃; entering a first tubular reactor, reacting at -10℃~20℃ and 0.15MPa for 10~60 minutes to generate trimethylammonium chloride; trimethylammonium chloride and epichlorohydrin entering a static mixer, simultaneously adding a catalyst and an organic amine; entering a second tubular reactor, reacting at 10~50℃ and 0.2MPa for 1~3 hours; during the reaction, monitoring the chloride ion concentration and epichlorohydrin residue in real time, dynamically adjusting the reaction parameters; filtering the reaction product through a nanofiltration membrane to obtain a high-purity cationic etherifying agent. This invention employs a continuous tubular reaction process combined with automatic control and nanofiltration membrane separation, resulting in a short production cycle, low energy consumption, few by-products, and a high-purity, odorless product, showing good industrial application prospects.

The application belongs to the technical field of microwave absorbing materials, and relates to Fe3O4@C magnetic modification MXene-based aerogel microwave absorbing material and a preparation method thereof. The microwave absorbing material has a porous structure, and the inner wall is attached with magnetic double-layer structure Fe3O4@C particles. The outer shell is spindle-shaped amorphous carbon, and the inner core is Fe3O4 magnetic particles. The preparation method comprises the following steps: preparation of nano spindle-shaped Fe2O3 precursor, preparation of magnetic double-layer structure Fe3O4@C particles, preparation of single-layer MXene nanosheet, and preparation of Fe3O4@C magnetic modification MXene-based aerogel. The Fe2O3 precursor is generated by using a hydrothermal method. The Fe2O3 precursor can not only be used as a template of a polydopamine shell, but also can be partially reduced to generate magnetic Fe3O4, so that the wave absorbing performance is enhanced. The polydopamine shell is carbonized at high temperature, and the internal Fe2O3 precursor is reduced to Fe3O4. The magnetic particles are positively charged and naturally adsorbed with the single-layer MXene nanosheet by using polydiallyldimethylammonium chloride treatment. Gelatin is used as a cementing agent in the application, so that the strength of the aerogel is ensured while the economy is ensured.

The invention discloses a flotation collecting agent formula based on quartz, a preparation method and an extraction method. The flotation collecting agent formula comprises a cation collecting agent and an anion collecting agent which are used in cooperation. Wherein the cation collecting agent is prepared from the following components in parts by weight: 10 to 40 parts of dodecyl amine, 10 to 40 parts of coconut oil alkylamine, 2 to 8 parts of dodecyl trimethyl ammonium chloride, 1 to 4 parts of a nonionic surfactant, 2 to 8 parts of ethanol and 5 to 10 parts of hydrochloric acid; the anion collecting agent comprises a sulfonate surfactant; the use of hydrofluoric acid is greatly reduced, fluorine pollution is reduced, the anionic collector and the cationic collector are compounded to play a synergistic role, implementation can be carried out under the weak acid condition, agent preparation and process control are simple and convenient, the agent dispersity is good, temperature and ore property fluctuation can be adapted, the flotation selectivity and recovery rate of quartz and feldspar can be remarkably improved, and the flotation efficiency is improved. The resource utilization value of the tailings is improved.

This invention discloses a modified rhamnolipin waterproofing agent for well workover operations in offshore oilfields and its preparation method. The method involves a one-step process where a 3-chloro-2-hydroxypropyltrimethylammonium chloride aqueous solution is added dropwise to a rhamnolipin solution, attaching a quaternary ammonium cation to the hydroxyl group of the rhamnolipin. After the reaction is complete and the solution is purified, the modified rhamnolipin waterproofing agent is obtained. The raw materials used in this invention are readily available, the preparation method is simple, and it is conducive to industrial production. The raw materials and products used have low biotoxicity and good environmental friendliness, which is beneficial for application in offshore oilfields. The solution prepared with the modified rhamnolipin waterproofing agent exhibits low surface tension, good temperature and salt resistance, and wetting improvement ability. It can significantly improve the reservoir water-locking permeability recovery rate, demonstrating not only a good waterproofing effect but also alleviating reservoir contamination problems caused by long-term production to a certain extent.

The invention provides an anti-swelling agent, a preparation method and application of the anti-swelling agent in fracturing. The anti-swelling agent is prepared from the following raw materials: dimethyl diallyl ammonium chloride, an auxiliary agent, an initiator and water. The anti-swelling agent disclosed by the invention is a cationic polymer taking dimethyl diallyl ammonium chloride as a main body, has good water solubility, is neutral in aqueous solution, generates a quaternary ammonium salt linear acting group with positive charges after being ionized in the aqueous solution, and has bridging and sweeping functions of a common viscosity stabilizer; and the material also has very strong electricity neutralization capability. According to the principle, cationic groups attract clay ions with negative charges, surface charges of colloid particles are reduced and neutralized, meanwhile, a clay colloid diffusion layer is compressed to enable the particles to be agglomerated, flocculation sedimentation is generated by means of the adhesion bridging effect of molecular chains, and clay expansion and dispersion migration are rapidly prevented.

The present application relates to the technical field of deodorant, and disclose a kind of biological deodorant for pasture and preparation method thereof, the present application is by adding cortex moutan extract, alkyl dimethyl benzyl ammonium chloride, modified chitosan, imidazole modified triazine base compound, lemon essential oil into stirrer, stir, after obtaining biological deodorant for pasture.The imidazole group, quaternary ammonium salt group, sulfonate sodium group triazine group in imidazole modified triazine base compound and modified chitosan all have good bactericidal effect.The triazine group in it can effectively kill bacteria, fungi and other microorganisms in animal manure, feed residue and other organic matters, thereby preventing the spread of odor;The imidazole group in it can inhibit the growth and reproduction of pathogenic bacteria, reduce the occurrence and spread of disease, and play a role in killing bacteria;The quaternary ammonium salt can effectively inhibit the growth and reproduction of microorganisms, can reduce the foul-smelling gas generated by the decomposition of organic matter by microorganism, thereby achieving the effect of deodorization.

A process for the production of iron phosphate, comprising the following steps: (1) Mixing an iron phosphide waste, an acidic liquid, an oxidizing agent and an adsorbent with stirring, heating to leaching and subjecting the resulting mixture to solid-liquid separation to obtain a first filtrate and a first filter residue; (2) Adding an alkaline liquid to the first filtrate to adjust the pH of the first filtrate, maintaining a temperature of the resulting mixture, and subjecting the resulting mixture to solid-liquid separation to obtain a second filter residue and a second filtrate; and subjecting the second filter residue to heat treatment to obtain iron oxide; (3) Subjecting the iron oxide to high-energy ball milling and adding a surfactant for activation to obtain a slurry; (4) Adding an extraction agent and an acidic liquid to the second filtrate obtained in step (2), carrying out an extraction and separation on a resulting mixture and subjecting a resulting organic phase to back-extraction to obtain phosphoric acid; and (5) Mixing the slurry obtained in step (3) with the phosphoric acid, heating to enable a reaction, subjecting the resulting mixture to solid-liquid separation to obtain a solid, and washing and sintering the solid to obtain the iron phosphate; where in step (1) the iron phosphide waste comprises a mixture of FeP and Fe2P; in step (1) the acidic liquid contains at least two from the following group: nitric acid, sulfuric acid and hydrochloric acid; In step (1) the oxidizing agent is at least one selected from the group consisting of hydrogen peroxide, oxygen, nitric acid and sodium persulfate; wherein in step (2) the alkaline liquid is at least one selected from the group consisting of a NaOH solution, a KOH solution, ammonia water, a urea solution, NH4Cl, NH4HCO3, Na2CO3 and NaHCO3; In step (2) the pH of the first filtrate is adjusted to 2.5 to 5; and In step (5) the molar ratio of Fe in the slurry to P in the phosphoric acid is 1:1–2; heating to enable a reaction is carried out at a temperature of 50 °C to 80 °C for 20 to 60 min; and the iron phosphate has a D 50 from 2 µm to 6 µm, a tapped density of 0.80 g / cm³ 3 up to 1.30 g / cm³ 3 , and a specific surface area of ​​4 m² 2 / g up to 8 m 2 / g indicates.

The application provides a MgAl2O4 carrier and a preparation method and application thereof, and relates to the technical field of catalysts. Urea, a soluble aluminum salt, a soluble magnesium salt, polydiallyldimethylammonium chloride and water are mixed to carry out a hydrothermal reaction to obtain a precipitate; the molar ratio of the urea, aluminum elements in the soluble aluminum salt, magnesium elements in the soluble magnesium salt and the polydiallyldimethylammonium chloride is 4.5:2:1:(1-2); the precipitate is sequentially dried and calcined to obtain the MgAl2O4 carrier. The prepared MgAl2O4 carrier is used as a catalyst carrier in a high-temperature and high-pressure dry reforming reaction of methane and carbon dioxide, and excellent stability is exhibited; under high-temperature and high-pressure conditions of 850 DEG C and 2 MPa, the MgAl2O4 carrier is evaluated for 230 hours, and the morphology of the MgAl2O4 carrier before and after the reaction has no obvious difference, the specific surface area changes little, and excellent mechanical strength and chemical stability are shown.

An embodiment of the present invention discloses an oil removal material, a preparation method thereof and an application. The method includes: tetraethyl orthosilicate, iron acetate, and magnesium acetate are subjected to hydrolysis and condensation reactions in the presence of a solvent and hydrochloric acid to form a transparent sol, and the sol is subjected to vacuum freeze-drying and grinding treatments to obtain a powder; the powder, water, and cetyltrimethylammonium chloride are subjected to a hydrothermal reaction in a high-pressure reaction kettle to obtain a hydrothermal product; the hydrothermal product is subjected to centrifugal separation and washing, and then calcined at 500-600 °C to obtain the oil removal material. The material provided by the present invention has good thermal stability, a large specific surface area, a high adsorption capacity, can be regenerated and recycled multiple times, is particularly suitable for oil removal and purification of recovered ammonia water in the coal chemical industry, and has potential industrial application prospects.

A suspension comprising a water soluble polymer suspended as particulates in a nonaqueous liquid is useful for treating water from which contaminant particles need to be removed. The suspension includes mineral oil and at least about 10 wt % of particulate polydiallyldimethylammonium chloride (polyDADMAC) in the form of powder or beads. The suspension can be highly concentrated, for example, up to 80 wt % polyDADMAC. The polyDADMAC can be high molecular weight beads. A method and system for delivering the suspension to flowing wastewater is also described. The method and system can be configured to treat water such as wastewater, wherein the wastewater is generated as a waste stream during various large-scale operations such as mining operations.

The invention belongs to the technical field of new energy waste water recovery, and particularly relates to a tetramethylammonium chloride waste water recovery treatment system. The evaporation kettle is provided with a liquid inlet pipe, an exhaust pipe and a discharge port; the vacuum pump is communicated with the evaporation kettle through an exhaust pipe; the heating mechanism is used for heating liquid in the evaporation kettle; the stirring mechanism is used for stirring liquid in the evaporation kettle, and the stirring mechanism is matched with the evaporation kettle; the deslagging mechanism comprises an air cylinder, a piston, a slope block and a spring, the air cylinder is fixedly connected with the main shaft, the piston is in sliding sealing connection with the interior of the air cylinder, the stirring rod is fixedly connected with the piston, one end of the spring is fixedly connected with the piston, the other end of the spring is fixedly connected with the air cylinder, the slope block is arranged in the evaporation kettle, and the stirring plate is matched with the slope block. According to the scheme, the problems that the heat transfer efficiency is reduced and the liquid cannot reach the desired temperature due to the fact that crystals are easily adhered to the surface of the heating mechanism are solved.

The application discloses a kind of molybdenum disulfide-MXene / biomass carbon composite aerogel and its preparation method and application, wherein the preparation method includes: (1) chitosan aerogel is pyrolyzed in tubular furnace at 400-800 DEG C, inert gas atmosphere;(2) the biomass carbon aerogel prepared in step (1) is soaked in ammonium molybdate tetrahydrate and thiourea mixed solution, then sodium citrate is added, and it is placed in reaction kettle and hydrothermal reaction at 160-220 DEG C;(3) MXene is added to deionized water and dispersed by ultrasonic to obtain MXene dispersion, and polydiallyldimethylammonium chloride is added to positively modify MXene, then the molybdenum disulfide / biomass carbon composite aerogel prepared in step (2) is immersed in modified MXene dispersion to obtain.The composite aerogel can exhibit high adsorption, high selectivity and high stability as an adsorption material, and has good market application prospect.

The invention discloses a method for recovering ammonium fluoride from semiconductor photovoltaic wastewater. The method comprises the following steps: adjusting pH in a pretreatment stage, and adding sodium citrate to complex metal ions; a composite extraction agent composed of diisooctyl phosphate, trialkyl phosphine oxide and methyl trioctyl ammonium chloride is adopted for multi-stage counter-current extraction; sequentially carrying out washing and two-stage gradient ammonia water reverse extraction to improve the selectivity and inhibit silicon-boron co-dissolution; the strip liquor is subjected to calcium and magnesium salt impurity removal, reduced pressure evaporation, graded cooling crystallization and vacuum drying, an ammonium fluoride product with the purity larger than or equal to 94% and the water content smaller than or equal to 0.5% is finally obtained, the extracting agent can be recycled, mother liquor and washing liquor are recycled, and the process is closed, environmentally friendly, economical and suitable for industrial application.

The application discloses application of tetramethylammonium chloride recovery liquid in a clay anti-swelling agent and belongs to the technical field of anti-swelling agent preparation. The tetramethylammonium chloride recovery liquid is applied in the clay anti-swelling agent, so that the tetramethylammonium chloride waste liquid can be fully utilized, the environment is protected, the obtained anti-swelling agent has the advantages of small dosage, good performance, low cost and good economic benefits.

The present invention provides a waste grease-based emulsifier and a preparation method thereof. The method of the present invention is to use waste grease as the main raw material, graft and modify it by diamine, then graft 2,3-epoxypropyltrimethylammonium chloride hydrophilic groups, and characterize the molecular structure and physicochemical properties of the emulsifier by means of Fourier infrared spectroscopy, surface tension measurement, etc. The excellent emulsifying performance of the waste grease-based emulsifier synthesized by the present invention is due to the rich carbon chain of the waste grease, which has excellent lipophilicity. The quaternary ammonium salt group carried by 2,3-epoxypropyltrimethylammonium chloride gives the emulsifier excellent hydrophilicity. The emulsifier can disperse asphalt to form emulsified asphalt, wherein asphalt is used as a dispersed phase and water is used as a continuous phase, and the asphalt is dispersed in water as small droplets; the synthesis process is controllable, the performance is reliable, and the environment is friendly, and the emulsification process does not require acid adjustment.

The present application relates to a kind of MXene load two-dimensional branched PdNi nanosheet heterojunction material and its preparation method and application.The present application is obtained by butyl ammonium hydroxide intercalation and stripping to vanadium-based MXene (V2CT x ) TBA-V2CT x Aqueous solution, join chloropalladic acid, nickel chloride, reducing agent ascorbic acid and surfactant dodecyltrimethylammonium chloride, in TBA-V2CT x Surface in-situ reduction is obtained PdNi / TBA-V2CT x Heterojunction material.The present application benefits from the excellent stability and fast electron transfer performance of V2CT x Itself, metal and carrier interaction, multi-metal synergistic effect and in-situ reduction high loading rate and high uniformity, the prepared heterojunction material has fast electron transport capacity, large catalytic activity surface area and higher durability, significantly better than commercial Pd / C electrocatalyst.

The present application relates to a pickling wastewater treatment process, including neutralization treatment, precipitation treatment, oxidation treatment, biological treatment and fine treatment. The present application uses calcium ions in lime and fluoride ions to form calcium fluoride precipitation to remove fluoride ions. The hydroxide of sodium hydroxide helps the precipitation of magnesium and aluminum ions, and can also neutralize with acids to generate salt and water to reduce the hardness of water. Sodium polystyrene sulfonate is a commonly used polymer adsorbent, which is widely used in wastewater treatment. Methacryloyloxyethyl trimethylammonium chloride is used as a cationic sewage flocculant to improve the flocculation effect. The modified chitosan has a high molecular weight, and can obtain a suitable charge density through the functional groups it has. Many parts extend into the liquid phase to improve the electrical neutralization efficiency. The extended part can also adsorb more colloidal particles to promote flocculation precipitation.

The application discloses a combined collector and application thereof in potassium feldspar reverse flotation desilication, and belongs to the technical field of mineral processing engineering. The combined collector is composed of sodium oleate and cetyltrimethylammonium chloride. When the total dosage of the medicament is 1*10 ‑4 mol / L to 6*10 ‑4 mol / L, pH is 10.0, and the molar ratio of cetyltrimethylammonium chloride to sodium oleate in the combined collector is 1:3 to 1:2, the high-efficiency reverse flotation separation of potassium feldspar and quartz can be realized. The combined collector has the advantages of strong collecting capacity, low production cost, small medicament dosage, good selectivity, environmental protection and safety, and can balance the separation effect and economic benefits. The combined collector of sodium oleate and cetyltrimethylammonium chloride is used for the flotation separation of potassium feldspar and quartz.

The application discloses a preparation method of a water-based developing solution, the water-based developing solution and application thereof, and belongs to the technical field of developing solutions. The preparation method comprises the following steps: a first amount of sulfuric acid is mixed with a second amount of isopropyl alcohol to obtain an isopropyl alcohol solution; tetramethylammonium chloride is mixed with the isopropyl alcohol solution according to a first preset proportion, a third amount of sulfuric acid is added, and the precipitate is filtered and dried to obtain white crystalline solid tetramethylammonium sulfate; the solid tetramethylammonium sulfate is dissolved in water, a suspension of barium hydroxide is added to the water, the reaction mixture is filtered, a tetramethylammonium hydroxide solution is obtained and purified; and the purified tetramethylammonium hydroxide solution is mixed with water according to a second preset proportion, and stirring is performed to obtain the water-based developing solution. The application aims to provide a water-based developing solution to solve the problem that the conventional developing solution in the form of an organic solvent is inconvenient to use in a chip developing process.