88 results about "Ammonium chloride" patented technology

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.

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 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.

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 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 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 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.

The invention relates to the technical field of antistatic agents, and particularly discloses an oil product antistatic agent and a preparation method thereof. The antistatic agent comprises the following raw materials: octadecylamine, modified AMPS, tetraethylammonium chloride, deionized water, dual-modified polyether, xylene, methanol, a low-temperature stabilizer and an initiator, the modified AMPS is obtained by modifying AMPS through a low-temperature modifier, and the low-temperature modifier comprises glycerol and urea; the dual-modified polyether is a product obtained by modifying polyoxyethylene polyoxypropylene ether with ammonia gas and butanol. The antistatic agent provided by the invention has good low-temperature stability, and can be well adapted to winter oil storage and transportation scenes in northern alpine regions.

This invention belongs to the field of water treatment agent technology, and discloses a sepiolite composite material, its preparation method, and its application in leather tanning wastewater. The sepiolite composite material includes: a sepiolite carrier; a quaternary ammonium salt molecular layer gradient-anchored on the surface of the sepiolite carrier, wherein the quaternary ammonium salt molecular layer includes dodecyltrimethylammonium chloride and hexadecyltrimethylammonium chloride; and β-cyclodextrin molecules bound to the surface of the quaternary ammonium salt molecular layer through intermolecular forces. This invention successfully constructs a dual-functional interface on the sepiolite surface, possessing both a "broad-spectrum hydrophobic adsorption domain" (quaternary ammonium salt layer) and a "specific molecular recognition domain" (cyclodextrin layer). This design overcomes the limitations of single modified materials, achieving a synergistic effect of graded capture and synergistic locking of oily contaminants, significantly improving the overall adsorption performance and selectivity of the composite material in complex systems.

The application discloses a method and system for strengthening and modifying activated carbon adsorption of perfluorinated compounds by micro-bubbles, belonging to the technical field of water treatment. The application is to immerse activated carbon in a polydiallyldimethylammonium chloride aqueous solution, treat the immersed activated carbon to be neutral and dry to obtain modified activated carbon; raw water containing PFAS is treated by micro-bubbles, and then the modified activated carbon is added to the raw water for reaction, and the treated water is discharged from the upper layer. The application compensates for the insufficient adsorption of short-chain PFAS by traditional activated carbon through PDADMAC electrostatic adsorption, improves the removal effect by combining the enrichment effect of micro-bubbles; the mass transfer is strengthened by slight disturbance, the adsorption kinetics is accelerated, and the interference of natural organic matter can be resisted to protect the adsorption sites; the process condition is mild and safe, there is no secondary pollution, and the engineering popularization is convenient.

The invention discloses a hydrophilic corrosion and scale inhibitor as well as a preparation method and application thereof, and belongs to the technical field of macromolecular water treatment. The hydrophilic corrosion and scale inhibitor has the following structure, in addition, the invention also provides a preparation method of the hydrophilic corrosion and scale inhibitor, which comprises the following steps: mixing sodium lignin sulfonate, formaldehyde and N-methylallylamine, and reacting under a heating condition; the preparation method of the corrosion and scale inhibitor comprises the following steps: firstly, adding 2, 3-epoxypropyl trimethyl ammonium chloride, reacting at 50-55 DEG C, heating to 80-90 DEG C, adding itaconic acid and maleamic acid, mixing, dropwise adding an initiator, and reacting at 80-90 DEG C to obtain the corrosion and scale inhibitor. The invention also provides application of the hydrophilic corrosion and scale inhibitor or the hydrophilic corrosion and scale inhibitor prepared by the preparation method in oil field water treatment. The hydrophilic corrosion and scale inhibitor provided by the invention can better realize corrosion and scaling.

The invention belongs to the technical field of organic synthesis, and provides a preparation method of low-methanol long-chain alkyl trimethyl ammonium chloride, which comprises the following steps: pumping long-chain fatty amine into a reaction kettle, vacuumizing and dehydrating at negative pressure, dehydrating ethanol by using a molecular sieve, adding ethanol as a solvent, introducing chloromethane into the reaction kettle by using a chloromethane control system, and reacting for 2-4 hours; and adding deionized water, uniformly stirring, and adjusting the hardness of the finished product to obtain a white vanishing cream finished product. A chloromethane flow controller and a chloromethane evaporator are additionally arranged between a chloromethane storage tank and a reaction kettle, so that chloromethane enters the reaction kettle in a complete gaseous state at a constant speed, and meanwhile, a gas distributor is additionally arranged at the bottom of the reaction kettle, so that gaseous chloromethane is better distributed at each corner of the reaction kettle; the chloromethane and the long-chain fatty amine can be fully contacted and react, so that the generation of byproducts can be effectively avoided.

The invention discloses an intelligent response type marine antirust agent composition as well as a preparation method and application thereof. The intelligent response type marine antirust agent composition comprises a solvent and the following components in parts by mass: 6-8 parts of ion response microcapsules, 6-8 parts of photo-thermal response microcapsules, 6-9 parts of benzotriazole covalent grafting modified functionalized graphene oxide and 34-38 parts of film-forming resin, a capsule core of the ion response microcapsule is a corrosion inhibitor; the capsule wall is a polyelectrolyte composite membrane formed by self-assembling cationic polyelectrolyte and anionic polyelectrolyte layer by layer, and the outer surface of the capsule wall further comprises an inorganic nanoparticle layer formed by biomimetic mineralization; the cationic polyelectrolyte is poly (diallyldimethylammonium chloride), the anionic polyelectrolyte is sodium polystyrenesulfonate, and the inorganic nanoparticles are calcium carbonate; the photo-thermal response microcapsule comprises a capsule core which is a mixture of CsPbBr and n-octacosane, and a capsule wall which is polyurea formaldehyde.

The invention relates to the technical field of oilfield chemistry, in particular to a dendritic micromolecular clay stabilizer and a preparation method and application thereof, the dendritic micromolecular clay stabilizer takes 2, 3-epoxypropyltrimethylammonium chloride and ethylenediamine hydrochloride as reaction raw materials, and the prepared dendritic micromolecular clay stabilizer is an aqueous solution of dendritic micromolecular salt. The dendritic micromolecular clay stabilizer is a strong polar molecule containing eight cations and six hydroxyls, has strong washing resistance, obvious clay expansion prevention effect and small molecular weight, and does not cause secondary damage to a reservoir; the influence on the base fluid viscosity of the emulsion fracturing fluid is small, the sand-carrying performance of the fracturing fluid is guaranteed, and the fracturing fluid can be used for fracturing construction of low-permeability and ultra-low-permeability reservoirs.

The invention discloses a method for separating quartz and feldspar by flotation, which comprises the following steps of: crushing, finely grinding and screening quartz ore, adding the quartz ore into a flotation tank, firstly adding a proper amount of water, stirring and mixing pulp, adding diluted hydrochloric acid or sodium hydroxide solution to adjust the pH value of the pulp to be alkaline, and filtering to obtain filtrate; and then a feldspar inhibitor ethylene diamine tetra (methylene sodium phosphate) and a collecting agent octadecyl trimethyl ammonium chloride are added, the dosing interval is 3 min, and finally foam and tank bottom products are obtained after air inflation flotation and foam scraping. Single ethylene diamine tetra (methylene sodium phosphate) is adopted as a feldspar inhibitor, the defects that an existing inhibitor is prone to causing poor selectivity of a collecting agent, large using amount, complex using process, large beneficiation wastewater treatment difficulty and the like are overcome, and excellent environment friendliness is achieved; according to the invention, sodium ethylene diamine tetra (methylene phosphate) and octadecyl trimethyl ammonium chloride are cooperatively used, so that the method has the advantages of simple reagent system, convenience in use process, alkaline ore pulp pH, outstanding separation effect and the like. The method effectively solves the industrial problems of low quartz feldspar separation efficiency, poor selectivity, high environmental protection pressure and the like under the current fluoride-free and acid-free system.

The freeze-thaw-resistant matrix comprises a freeze-thaw stabilizer and a moisture inhibitor, the freeze-thaw stabilizer comprises soil, a compound fermentation product, compound microorganisms, a microcrystalline cellulose modified matrix and basalt fibers, and the moisture inhibitor comprises one or more of waterborne polyurethane, hydrophobic nano-silica, vinyl acetate and ethylene copolymer rubber powder. The cleaning agent further comprises cationic poly dimethyl diallyl ammonium chloride. The invention further discloses a freeze-thaw resisting structure which comprises the freeze-thaw resisting matrix and the composite three-dimensional mesh pad. The invention further provides a preparation method and application of the freeze-thaw-resistant matrix and the freeze-thaw-resistant structure. According to the freeze-thaw-resistant matrix, the freeze-thaw-resistant structure and the preparation method and application thereof, the freeze-thaw-resistant structure is low in cost, easy to construct and excellent in freeze-thaw resistance and water retention performance, a stable and suitable environment can be provided for growth of debris flow slope plants, cattle and sheep can be prevented from gnawing the freeze-thaw-resistant structure in the early growth stage of nursery stocks, and the freeze-thaw-resistant matrix and the freeze-thaw-resistant structure can be applied and popularized on a large scale.

The invention discloses an excitation liquid system for improving the luminous efficiency of acridinium ester, and relates to the technical field of chemiluminescence immunoassay. The excitation liquid system for improving the luminous efficiency of acridinium ester comprises an excitation liquid and a pre-excitation liquid, the pre-excitation liquid comprises nitric acid, hydrogen peroxide and PVP-K30, and the excitation liquid comprises hexadecyl trimethyl ammonium chloride, TritonX-100, a defoaming agent 204 and sodium hydroxide. The components cooperate with one another, bubbles can be effectively eliminated, the background value is reduced, and the luminous efficiency is improved.

To provide a method for removing suspended matter and oil content in ammonia liquor containing coal-derived powder and tar, which enables the reduction of turbidity of the ammonia liquor and the formation and precipitation of agglomerates containing coal-derived powder and tar in the ammonia liquor.SOLUTION: A method for removing suspended matter and oil content in ammonia liquor comprises allowing a polymer coagulant to be present in ammonia liquor that contains suspended matter and oil content produced by washing and cooling coke oven gas with the ammonia liquor. The suspended matter contains coal-derived powder, and the oil content contains tar. The polymer coagulant has a cation colloid equivalent of 1.0 to 3.5 meq / g at pH 4.SELECTED DRAWING: None

The invention discloses a salt crystallization inhibitor for preventing sodium chloride crystallization in oil well construction and a preparation method thereof. The sodium tripolyphosphate, the octadecyl trimethyl ammonium chloride, the fatty alcohol-polyoxyethylene ether and the like are prepared with the sodium polyacrylate salt crystallization inhibitor, so that the salt crystallization inhibition effect of polyacrylic acid derivatives and other organic compounds is greatly improved. The inhibitor has the advantages of being simple in formula, convenient to operate, low in production cost and the like, the production efficiency of petroleum and inorganic chemical industries can be improved, and the service life of pipelines and equipment can be prolonged.

Provided is a salty taste enhancer for enhancing a salty taste derived from sodium chloride; a salty taste seasoning that can be used as a substitute for common salt; a food with an enhanced salty taste; a method for producing foods; and a method for reducing the salt content of foods. A salty taste of sodium chloride is enhanced by coexistence with sodium hydrogen carbonate and ammonium chloride or with sodium carbonate and ammonium chloride. The ratio of the total weight of the sodium hydrogen carbonate or the sodium carbonate and the ammonium chloride to the weight of the sodium chloride is from 0.1 to 75.0.

The invention discloses a method for recovering tetramethylammonium hydroxide from tetramethylammonium hydroxide developing solution waste water, which comprises the following steps: (1) adding concentrated hydrochloric acid into the tetramethylammonium hydroxide developing solution waste water, dropwise adding while stirring, adjusting the pH value to 2-5, and reacting for 2-4 hours; the photoresist in the wastewater is separated out while the tetramethylammonium hydroxide is converted into tetramethylammonium chloride, the separated photoresist is removed through suction filtration, and tetramethylammonium chloride suction filtration liquid is obtained; (2) concentrating the tetramethylammonium chloride suction filtration liquid obtained in the step (1) by utilizing an electrodialysis process to obtain an electrodialysis concentration chamber liquid; and (3) converting the electrodialysis concentrated chamber liquid into a tetramethylammonium hydroxide solution through a bipolar membrane electrodialysis process, and reducing chloride ion residues. According to the method disclosed by the invention, impurities in the wastewater can be effectively removed, the concentration of tetramethylammonium hydroxide is remarkably improved, and chloride ion residues are remarkably reduced.

This invention belongs to the field of solid waste treatment technology, specifically relating to a quaternary ammonium salt ionic liquid microemulsion for heavy oil desorption, its method, and its application. The quaternary ammonium salt ionic liquid microemulsion for heavy oil desorption of this invention, by weight, comprises 0.1-0.8 parts of a quaternary ammonium salt ionic liquid surfactant, 17.2-22.9 parts of n-propanol, 20-25 parts of n-hexane, and 56-59 parts of water; wherein the quaternary ammonium salt ionic liquid surfactant is 1-alkyl-(2-hydroxyethyl)-dimethylammonium chloride. The quaternary ammonium salt ionic liquid microemulsion for heavy oil desorption of this invention is prepared using a quaternary ammonium salt ionic liquid surfactant, n-propanol, n-hexane, and water as raw materials. The microemulsion is an oil-in-water type, characterized by low surface tension, strong solubilizing ability, low dosage, simple treatment process, and recyclability.