104 results about "Free acid" patented technology

Compositions for delivering ketone bodies to a subject include one or more beta-hydroxybutyrate salts, one or more acetoacetate salts, beta-hydroxybutyric acid, and optionally acetoacetic acid. The compositions may optionally include one or more ketone body esters, such as one or more beta-hydroxybutyrate esters and / or one or more acetoacetate esters. An example composition contains about 2% to about 98% on a molar basis of the one or more beta-hydroxybutyrate salts and the one or more acetoacetate salts, about 2% to about 98% on a molar basis of the beta-hydroxybutyrate free acid and optionally the acetoacetate free acid, and optionally about 2% to about 98% on a molar basis of one or more ketone body esters.

The invention discloses a method for purifying high-purity quartz sand, which belongs to the technical field of preparation of high-purity quartz sand, and comprises the following steps: (1) sequentially carrying out high-pressure water jet scrubbing, gradient screening classification and dielectric separation on sandstone type quartz ore raw ore with SiO2 content of 85-90% to remove feldspar to obtain quartz particles with feldspar content of less than or equal to 2%; (2) sequentially carrying out microwave field pretreatment, infrared light field crack propagation and pulse laser implosion stripping on the quartz particles obtained in the step (1), and regulating and controlling technological parameters of the three fields through linkage of a PLC (Programmable Logic Controller) system, so that the stripping rate of an impurity inclusion is greater than or equal to 92%; according to the invention, aiming at quartz particles with different particle sizes, a plurality of process parameters are automatically optimized and adjusted through the PLC system, accurate control and adaptive production are realized, and high-purity products can be stably produced from sandstone type quartz raw materials with different grades in different regions. And the inclusion is opened from inside to outside through a multi-field synergistic effect, and the completeness of the quartz particles is retained to the greatest extent by combining with an optimized fluoride-free acid leaching condition.

Processing aids and lubricants with free acid groups and relatively high molecular weights are used as process aids in the formation of extrudates and other molded materials. The compositions of this invention can be used as defined, or can be used with prior art processing aids, depending on the end use application. The novel materials and process provide a useful alternative to the sole use of fluorine-based polymer processing aids.

The invention relates to the technical field of flash fire lifting agents, and discloses a flash fire lifting agent of an electrolyte of a boron-free aluminum electrolytic capacitor and a preparation method of the flash fire lifting agent, and the flash fire lifting agent comprises the following components in percentage by mass: 10-30% of organic ammonium carboxylate; 5%-15% of a nitro compound; 3%-10% of a phosphate ester compound; 2%-8% of a polyethylene glycol derivative; 0.5%-3% of organic siloxane; and the balance of deionized water. Through the synergistic effect of the organic ammonium carboxylate, the nitro compound, the phosphate ester substance and the organosiloxane in a specific proportion, the sparking voltage of the electrolyte is remarkably improved, and the negative effects of boron elements on the environment and the performance of a capacitor are avoided; a nitro compound is used as an electron acceptor to inhibit hydrogen precipitation, and cooperates with phosphate to fill oxide film micropores and block current concentration; the organic siloxane forms a hydrophobic barrier on an electrode interface, electrolyte decomposition is delayed, the organic carboxylic acid ammonium salt accurately controls the free acid concentration, and the conductivity rise caused by hydrogen ion migration is avoided.

The invention discloses a resourceful treatment method for stainless steel pickling waste liquid and waste water. The waste liquid is divided into high-concentration waste liquid and low-concentration waste liquid according to the acid concentration and the salt concentration to be treated respectively. Sequentially recovering gypsum, chromic hydroxide, nickel sulfide, ferrous hydroxide and manganese-rich slag from the low-concentration waste liquid through gradient precipitation; and neutralizing free acid from the high-concentration waste liquid by using ferrous hydroxide generated in a low-concentration section, cooling and crystallizing to recover ferrous sulfate, deeply removing nickel by using nickel sulfide generated in the low-concentration section, and precipitating to recover chromium hydroxide. In the whole process, generation of ferric iron is strictly controlled, and high-value productization recovery of free acid and all metals is achieved. The method has the advantages of low medicament consumption, high metal recovery rate, high product value, no secondary pollution and the like.

The application discloses a method for rapidly and harmlessly treating phosphogypsum, and particularly relates to the harmless treatment technical field of industrial solid waste. The method comprises the following steps: mixing raw materials with an alkaline neutralizing agent, a trapping agent and an activating agent, adding a phosphorus solidifying agent and a fluorine solidifying agent, mixing, carbonizing and aging, and obtaining harmless phosphogypsum. The method adopts the alkaline neutralizing agent to rapidly neutralize free acid and improve the pH of the system; the trapping agent adsorbs heavy metals; the activating agent promotes As, Cd and the like to form a difficult-to-dissolve iron oxide gel or a precipitate; the phosphorus solidifying agent and the fluorine solidifying agent perform deep chemical precipitation to form a stable iron-calcium-phosphate / ferric fluoride composite solidified body. The functions of the agents are clear, and the agents have synergistic effects; the solidification effect of the agents on high water-solubility phosphorus, fluorine and various heavy metals is far better than that of a single or simply compounded agent system; and the leaching concentration can be reduced to a level far lower than the national standard.

The invention belongs to the technical field of electrolyte materials, and discloses a high-purity lithium bis (fluorosulfonyl) imide solution as well as a preparation method and application thereof. The preparation method of the high-purity lithium bis (fluorosulfonyl) imide solution comprises the following steps: 1) mixing inert chloralkane and lithium carbonate to form a suspension, dropwise adding bis (fluorosulfonyl) imide into the suspension at reaction temperature and pressure for reaction, after the reaction is finished, performing filter pressing, washing, and performing filter pressing again to obtain a filter cake; and 2) crushing the filter cake, feeding the crushed filter cake into a closed-loop circulating fluidized bed, sequentially drying in a low-temperature area and a medium-temperature area, instantaneously contacting and dissolving the obtained hot powder with an atomized and sprayed carbonate solvent to form a solution, and performing microfiltration to obtain the high-purity lithium bis (fluorosulfonyl) imide solution. The lithium bis (fluorosulfonyl) imide solution has ultra-high purity and ultra-low moisture, the content of other impurities such as chloride ions, free acids and metal ions is extremely low, additional steps of dehydration, purification or acidity adjustment and the like are not needed, and the lithium bis (fluorosulfonyl) imide solution can be directly used for preparing a high-performance lithium ion battery electrolyte.

This utility model relates to the field of ammonium sulfate post-treatment technology in ammonia desulfurization, and discloses a free acid neutralization device for ammonium sulfate by-products of ammonia desulfurization. The device includes a hydrocyclone, centrifuge, neutralizing agent silo, metering feeder, feeding screw, dryer, dust removal equipment, and finished product storage silo. This free acid neutralization device for ammonium sulfate by-products of ammonia desulfurization, by setting up a neutralizing agent silo and a metering feeder, utilizes the post-treatment system equipment of the ammonia desulfurization unit to achieve compliant production of free acid from the by-product ammonium sulfate. It features a simple process, low equipment investment, negligible operating costs, low failure rate, and high safety and reliability.

The invention provides a solution composition for testing the grafting rate of maleic anhydride, and belongs to the field of high polymer material detection. The solution composition for testing the maleic anhydride grafting rate is prepared from the following components in parts by weight: 80 to 90 parts of a main solvent, 5 to 10 parts of an auxiliary solvent, 3 to 5 parts of a surfactant, 2 to 5 parts of a solubilizer, 0.05 to 0.15 part of a disentangling agent and 0 to 0.15 part of water. The method comprehensively solves the four key problems of high-temperature volatilization / low-temperature precipitation, entanglement embedding, low titration efficiency and free anhydride interference in the traditional method which influence the test accuracy of the maleic anhydride grafting rate.

The invention discloses a preparation method and a recrystallization method of lithium bis (oxalato) borate. The invention provides a preparation method of lithium bis (oxalato) borate, which comprises the following steps: in a solvent, carrying out reaction on chain-like silicon oxalate as shown in a formula II and lithium bis (oxalato) borate to obtain lithium bis (oxalato) borate as shown in a formula III, the solvent is an aprotic organic solvent. The preparation method has one or more advantages as follows: the yield is high, the purity is high, insoluble substances are few, the chromaticity is low, free acid or chloride ions are lower, lithium bis (fluoro) oxalato borate can be recycled, and the cost is reduced.

Organic molecules with free acid groups and a molecular weight of greater than 140 g / mol used in combination with surfactants, are used as processing aids in the formation of extrudates and other molded materials. The compositions of this invention can be used as defined herein, or can be used with prior art processing aids, depending on the end use application. The novel materials and processes provide a useful alternative to the sole use of fluorine-based polymer processing aids.

This invention provides an antibacterial and antifungal TPE material, belonging to the field of thermoplastic elastomer technology. The antibacterial and antifungal TPE material of this invention comprises the following components: SEBS, PP, a plasticizer, modified nano-zinc oxide, N-n-butyl-1,2-benzisothiazolin-3-one, 4,5-dichloro-2-n-octyl-4-isothiazolin-3-one, an antioxidant, and zinc stearate; wherein the modified nano-zinc oxide is obtained by melt blending nano-zinc oxide with maleic anhydride-grafted SEBS, the mass ratio of the modified nano-zinc oxide to the maleic anhydride-grafted SEBS is (0.6-1.7):1, and the particle size of the nano-zinc oxide is 20-50 nm; the free acid content of the zinc stearate is 0.3%-0.5%. The antibacterial and antifungal TPE material of this invention possesses good antibacterial properties, antifungal properties, and tensile strength.

This invention relates to the field of fertilizer production technology, specifically to a segmented ripening preparation process for low-free-acid, high-water-soluble superphosphate; the process includes the following steps: feeding phosphate rock powder into a ball mill for grinding to a particle size ≤120 mesh, preparing 93%±0.5% industrial sulfuric acid; adding phosphate rock powder at a molar ratio of available P2O5 to sulfuric acid of 1:1.05~1:1.07, adding 0.3%~0.5% (by weight of phosphate rock powder) of a modifying agent, and reacting at 65~70℃ for 40~50 minutes. In the later stage of the reaction, low-pressure steam of 0.2 MPa is introduced; staged maturation is carried out, first in a closed chamber at 55~60℃ for 24 hours, and then in a ventilated chamber at 45~50℃ and a wind speed of 0.8~1.0 m / s for 48 hours; granulation and screening are carried out, with the granulation drum rotating at 14~16 r / min and tilted at an angle of 3°~5°; through the above methods, the problems of high free acid, low proportion of water-soluble phosphorus and insufficient production efficiency in traditional processes are solved, and the product quality and production capacity are synergistically improved.

To provide a novel inverse latex using a novel metal ion sequestering agent.SOLUTION: There is provided a self-invertible inverse latex having an aqueous phase, comprising: a) a cross-linked anionic polyelectrolyte consisting of: at least one first monomer unit derived from 2-methyl-2-[(1-oxo-2-propenyl)amino]1-propane sulfonic acid in the form of a free or partially or totally salified acid; and at least one second monomer unit derived from at least one monomer selected from the group consisting of (2-hydroxyethyl)acrylate, (2,3-dihydroxypropyl)acrylate, (2-hydroxyethyl)methacrylate and the like; and at least one monomer unit derived from a cross-linking polyethylenic monomer; b) at least one chelating compound selected from the group consisting of ethylenediamine disuccinic acid in the form of trisodium salt, tetrasodium salt of glutamic acid, N,N diacetic, or the sodium salt of imminosuccinic acid.SELECTED DRAWING: None

The application provides a preparation method of MK-0616 south fragment, and relates to the technical field of polypeptide synthesis. The preparation method comprises the following steps: condensation reaction of alkyl primary alcohol 17 and protected amino acid 2 to obtain intermediate 18; deprotection reaction of the intermediate 18 to obtain intermediate 19; condensation reaction of the intermediate 19 and compound 4 to obtain intermediate 20; deprotection reaction of the intermediate 20 to obtain intermediate 21; condensation reaction of the intermediate 21 and compound 10 to obtain intermediate 22; deprotection reaction of the intermediate 22 to obtain intermediate 23; condensation reaction of the intermediate 23 and compound 14 to obtain intermediate 24; hydrolysis reaction of the intermediate 24 to obtain a crude product of MK-0616 south fragment; salt crystallization of the crude product of MK-0616 south fragment to obtain intermediate 15; and free acidization of the intermediate 15 to obtain a pure product of MK-0616 south fragment.

The application discloses a kind of alkalinity slow-release materials and preparation method for promoting carbon sequestration and sink in marine artificial reef.The alkalinity slow-release material includes magnesium hydroxide, sodium carbonate, glutaraldehyde, cement, three light methyl aminomethylane buffer and water.Sodium carbonate, magnesium hydroxide and glutaraldehyde are mixed with cement, then water and three light methyl aminomethylane buffer are added for stirring.After sufficient stirring, the alkalinity slow-release material is obtained by setting and solidifying in a mold.The magnesium hydroxide and sodium carbonate of slow-release material react with free acid ions in water body to generate soluble salt that can be absorbed and salt that inhibits the growth of algae.The slow-release material increases the CO2 absorption capacity of water body and has no adverse effects on the environment.It can also be used to make artificial reefs, which can adjust the alkalinity of seawater and promote the growth of corals in addition to the function of transplantation and fixation.By using the slow-release material, the alkalinity of seawater can be maintained within a certain range, CO2 absorption and seawater acidification can be reduced, which is helpful for the recovery of coral reef community and promotes carbon sequestration and sink in seawater.

This tin alloy plating solution comprises: (A) a soluble salt that contains at least a stannous salt; (B) a soluble salt of a metal that is nobler than tin; (C) a leveling agent that is composed of an alkanesulfonic acid which contains 9-18 carbon atoms in each molecule or a salt thereof; (D) a free acid; (E) a nonionic surfactant that contains one or more phenyl groups in each molecule; and (F) an EO / PO block polymer that has an EO group at an end. The EO ratio in the EO / PO block polymer is within the range of 20 mol% to 50 mol% inclusive, and the molecular weight of the EO / PO block polymer is within the range of 1,500 to 3,500 inclusive.

The application discloses a driver special anti-drowsy spicy water and a preparation method and application thereof, and relates to the technical field of functional drinks.The raw material components of the spicy water include aged old-lake sour water, self-made iodine-free acid salt water, pepper extract and trace chicken essence;the self-made iodine-free acid salt water is prepared by mixing 92 parts of drinking water and 8 parts of iodine-free salt by weight;the salt content of the finished product is 0.5%-0.8%, the pH value is 3.0-3.6, and the spiciness of the pepper extract is 10000-40000 SHU.The application further discloses a preparation method of the spicy water and an anti-slip light-proof glass bottle packaging structure specially designed for drivers.The natural sour and spicy synergistic stimulation of the aged old-lake sour water and the pepper extract can effectively inhibit the drowsiness of drivers, relieve fatigue driving, and keep the drivers awake for more than 30 minutes after single drinking;the application is suitable for long-distance drivers, and has a remarkable anti-drowsy effect and good driving scene adaptability.

This application provides a continuous titration method for the sulfuric acid and ammonium nitrate content of silicon etching solution. The continuous titration method includes the following steps: weigh m grams of silicon etching solution sample into a sample bottle, add phenolphthalein indicator, titrate with a first sodium hydroxide standard solution of concentration C1 until a pink color is achieved, and record the volume consumed V1. Calculate the sulfuric acid content. Add neutral formaldehyde solution to the same solution and let it stand for a first preset time to generate a free acid solution. Continue titrating the free acid solution with a second sodium hydroxide standard solution of concentration C2 until the solution turns pink. Gently heat the solution to a preset temperature and maintain this temperature for a second preset time. If the pink color persists, the titration endpoint is determined, and the volume consumed V2 is recorded. Calculate the ammonium nitrate content. This method achieves continuous titration of two components with a single sample, eliminates mutual interference between components, optimizes the endpoint determination method, and thus achieves a simple operation, high accuracy, low sample consumption, and high detection efficiency.

This invention discloses an ultra-thin, tensile-reinforced packaging film, relating to the field of agricultural packaging film technology. The film has a seven-layer co-extruded structure with a total thickness of 15–22 micrometers. It comprises an outer surface unwinding weather-resistant layer, an inner surface adhesive layer, a core layer with pinhole self-sealing in the middle, and tensile-reinforced crack-blocking layers on both sides. The core layer contains a polyisobutylene sealing phase, a dynamic ionic framework composed of a blend of sodium and zinc ionomers and unneutralized ethylene-acid copolymer, and a compatibilizer containing epoxy-based ethylene copolymers. The molar ratio of epoxy to free acid groups is 0.05–0.25, resulting in polyisobutylene forming a sealing microdomain with a median particle size of 0.3–1.2 micrometers and 90% of the particles having a diameter no greater than 2.5 micrometers. The blocking layer contains a microfibrillated reinforcing phase. Under pre-tension, the film can quickly seal pinholes and reduce oxygen intrusion, while simultaneously inhibiting the migration of the sealing phase, reducing in-roll adhesion and downtime for repairs.

Compositions and methods for controlling, mitigating, or reducing undesired vegetation including difficult to control weed species such as Juniper and Kochia. Methods for controlling, mitigating, or reducing undesired vegetation belonging to one or more difficult to control weed species may include applying to the undesired vegetation or its environment an herbicidally effective amount of an oil dispersion formulation, the oil dispersion formulation comprising aminocyclopyrachlor in a free-acid form suspended or dispersed in one or more oils.

The application discloses a preparation method of a low-sodium high-activity copper-based methanol synthesis catalyst, which comprises the following steps: configuring a mixed solution (1) of Cu(NO3)2 and Zn(NO3)2; configuring a mixed solution (2) of Cu(NO3)2, Zn(NO3)2 and Zr(NO3)4; removing free acid in the mixed solutions (1) and (2); configuring an alkaline precipitant solution (3) and mixing the alkaline precipitant solution (3) with the copper-zinc mixed solution (1) to obtain a precipitate binary matrix precursor; simultaneously pumping the mixed solution (2) and the alkaline precipitant solution (3) into the washed precipitate to obtain a binary matrix; washing the solution after removing excessive impurities to obtain a catalyst matrix; adding a low-sodium alumina carrier, and performing washing, filtration, drying, calcination and the like to obtain a catalyst precursor; and performing washing, drying and shaping on the catalyst precursor to obtain a finished product. The methanol synthesis catalyst prepared by the method has lower impurity sodium content, high activity, better selectivity and better physicochemical properties, and is suitable for synthesizing methanol from a synthesis gas containing CO, CO2 and H2, and is especially suitable for a low-temperature and low-pressure methanol synthesis device.

The utility model relates to the technical field of waste liquid treatment, and provides a waste acid recovery resin adsorption bed and a waste acid recovery system.The waste acid recovery resin adsorption bed comprises a resin tank, the resin tank is filled with adsorption resin capable of adsorbing acid ions, and the particle size of the adsorption resin is 0.1-0.3 mm; the bottom of the resin tank is connected with a first water distribution device, the first water distribution device is provided with a first liquid inlet pipe, and the first liquid inlet pipe is used for supplying acid liquid into the resin tank upwards in the axial direction; the top of the resin tank is connected with a second water distribution device, the second water distribution device is provided with a second liquid inlet pipe, and the second liquid inlet pipe is used for supplying flushing water into the resin tank downwards in the axial direction; according to the utility model, acid liquor and flushing water are uniformly distributed through the two water distribution devices, so that adsorption resin in the resin tank can be fully contacted and efficiently adsorb acid ions, free acid ions in resin particles can be effectively flushed out to form recycled acid liquor, the acid liquor can be recycled, the waste acid treatment effect is obvious, and the cost is reduced.

Processing aids and lubricants with free acid groups and relatively high molecular weights are used as process aids in the formation of extrudates and other molded materials. The compositions of this invention can be used as defined, or can be used with prior art processing aids, depending on the end use application. The novel materials and process provide a useful alternative to the sole use of fluorine-based polymer processing aids.

The invention discloses a method for preparing an iron salt water purifying agent by using iron-containing waste acid, which comprises the following steps: mixing the iron-containing waste acid with an additional acid solution to obtain an iron salt raw material; then the ferric salt raw material and oxygen are subjected to a continuous flow reaction, and a ferric salt water purifying agent is obtained; the mass fraction of hydrogen ions in the ferric salt raw material in terms of hydrogen chloride is 4.8-8.5%; in the continuous flow reaction, the conveying flow rate of the ferric salt raw material is 500-2000kg / h, and the ratio of the conveying flow rate of the ferric salt raw material to the conveying flow rate of oxygen is 1000: (10-20); the temperature of the continuous flow reaction is 100-165 DEG C, and the pressure of the continuous flow reaction is 1.25-2 MPa. According to the invention, oxygen is taken as an oxidizing agent, the mass fraction of hydrogen ions in the ferric salt raw material is controlled in a specific range, the conveying flow rate of the ferric salt raw material is controlled in a specific range, and the pressure of continuous flow reaction is controlled in a specific range, so that the prepared ferric salt water purifying agent is high in Fe < 3 + > ion content; the content of free acid is low, and the content of insoluble substances is low.

The invention discloses a spodumene clinker processing collaborative optimization control method and a spodumene clinker processing collaborative optimization control system based on multipoint real-time quality feedback, which relate to the technical field of intelligent control, and execute closed-loop optimization control based on a process control system in combination with key quality data and temperature distribution data, operating parameters of a vertical mill system are dynamically adjusted, and the discharging granularity is stabilized; performing double-closed-loop optimization control on the acidification device, and cooperatively performing sulfuric acid dosage pre-control and acidification rate verification adjustment on the basis of free acid content FA, residual acid content RA data and temperature distribution data; the key quality data comprises vertical mill discharge granularity, free acid content FA and residual acid content RA; and when the double-closed-loop optimization control of the acidification device cannot reach the target, a cooperation request is sent to vertical mill multivariable model prediction control, and the target control range of the discharging granularity is adjusted. The problems of unstable quality, poor continuity, high consumption and low automation level in spodumene clinker processing are solved.

The invention belongs to the technical field of mineral processing and silicon material preparation, and relates to a method for preparing quartz sand by efficiently separating potassium feldspar and quartz through a hydrofluoric acid-free method. According to the method, potassium feldspar and quartz are separated by adopting a fluoride-free acid method, hydrofluoric acid is abandoned in the method, the pH value of ore pulp is adjusted by sulfuric acid for flotation, and hydrofluoric acid is high in corrosivity, pollutes the environment and easily causes harm to personnel. A used flotation reagent is an independently researched and developed MK composite collecting agent, and compared with a conventional reagent, the flotation reagent is good in selectivity and not prone to hurting the human body; the independently researched and developed MK composite type collecting agent has high collecting force and selectivity on separation of potassium feldspar and quartz, and selective flotation can be conducted through characteristic adsorption among molecules and weak difference between the surface of the feldspar and the quartz.

The invention provides an electrolyte additive and application thereof, and the electrolyte additive comprises an imidazole sulfonate compound, pentaerythritol bicyclic sulfate and 1, 6-hexamethylene diisocyanate. When the electrolyte additive is applied to an electrolyte, free acid generated by the electrolyte along with storage such as transportation can be inhibited, the stability of the electrolyte is improved, and meanwhile, when the obtained electrolyte is applied to a secondary battery, the film-forming impedance is low, and the high-temperature performance of the secondary battery is improved.

A sensor to detect solid particles of a target salt can include a support substrate, an adsorption layer, a sensing layer oriented between the support substrate and the adsorption layer, and an electrode pair in contact with the sensing layer and separated by the sensing layer. The adsorption layer can include an ion exchange medium formed of a first porous structured material functionalized with basic or acidic functional groups. The basic or acidic functional groups can remove an acid or base component from the target salt to form a free base or free acid, respectively, of the target salt. The sensing layer can include a second porous structured material functionalized to detect the free base or acid of the target salt by a change in conductivity.

The invention provides a bisphenol A synthesis catalyst and a preparation method of bisphenol A. The catalyst comprises cation exchange resin and a modified molecular sieve, the surface of the modified molecular sieve is connected with a modified group, and the modified group is selected from any one or two of sulfydryl alkyl and amino alkyl. The modified molecular sieve can promote the generation of active intermediate acetone carbon cations in the reaction process, improve the reaction rate and accelerate the reaction with phenol to generate bisphenol A. The mixed catalyst is adopted, the advantages of high activity of a hydrochloric acid method and high purity of a resin method are considered, free acid content in a product is less, and the product quality is higher than that of a hydrochloric acid catalysis method.