86 results about "Amine oxide" patented technology

The disclosure relates to compositions, including ready-to-use spray or wipe compositions, that are non-toxic, non-corrosive, biodegradable acidic antimicrobial compositions that exhibit broad-spectrum antimicrobial efficacy, wherein the compositions comprise an amine oxide, such as an alkyl amine oxide, in combination with an acidulant. Beneficially, the acidic antimicrobial compositions are capable of achieving at least a 3-log microbial reduction within 5 minutes under relatively mild pH conditions. The compositions provide cleaning and sanitizing.

The invention belongs to the technical field of natural gas extraction, and particularly relates to an oil-resistant anti-freezing corrosion-inhibition foaming agent for a gas well as well as a preparation method and application of the oil-resistant anti-freezing corrosion-inhibition foaming agent. The oil-resistant anti-freezing corrosion inhibition type foaming agent for the gas well is prepared from the following components in parts by mass: 40 to 70 parts of sodium alpha-olefin sulfonate, 10 to 20 parts of cocamidopropyl dimethylamine oxide, 1 to 10 parts of modified nanoparticles, 20 to 40 parts of betaine zwitterionic surfactant, 5 to 15 parts of corrosion inhibitor, 1 to 15 parts of polyvinyl pyrrolidone and the balance of water. After the foaming agent is aged at the low temperature of-30 DEG C, the liquid carrying rate of the foaming agent can be up to 83.8% in the range that the condensate oil content is 10%-50%, the degree of mineralization resistance is up to 2 * 10 mg / L, and the corrosion inhibition rate in a composite sample solution containing 20 wt% of condensate oil, 20 wt% of methanol and saturated CO2 can be up to 75% or above; the requirements of extreme composite working conditions of high salinity, gas condensate pollution and acid gas corrosion in the middle and later periods of gas well development can be met, and the dual effects of drainage gas recovery and underground protection are achieved.

The invention discloses a two-phase carbon dioxide absorbent based on ionic liquid and application of the two-phase carbon dioxide absorbent. The two-phase carbon dioxide absorbent based on the ionic liquid is prepared from 9 to 21 parts of tetramethyl ammonium hydroxide glutamate, 14 to 21 parts of diethylenetriamine, 50 to 65 parts of N, N-dimethylethanolamine and 9 to 11 parts of water. According to the absorbent, the CO2 loading capacity is improved through the synergistic effect of an alkaline site of the ionic liquid and amine in the absorption stage, and an acid site of the ionic liquid serves as a built-in proton donor in the regeneration stage to promote decomposition of an absorption product, so that high absorption capacity and low regeneration energy consumption are synergistically achieved. The absorbent is high in COO absorption capacity, low in regeneration energy consumption, low in regeneration temperature and good in cycling stability, and an innovative solution is provided for solving the high-energy-consumption bottleneck of a traditional amine method carbon capture technology.

A laundry detergent composition can include a nonionic surfactant, an amine oxide, and a quaternary ammonium salt biocide, where the composition is micellar.

The present invention relates to an aqueous foaming cleaning composition for removing soils at low temperature from surfaces to be cleaned, characterized in that the aqueous foaming cleaning composition comprises: linear and / or branched C 12 alkyl dimethyl amine oxide or C 12 alkyl diethyl amine oxide or C 12 alkyl methyl ethyl amine oxide; at least one anionic surfactant of the following: dodecyl (oxyethylene) 14 alkyl dimethyl amine oxide or C 14 alkyl diethyl amine oxide or C 14 alkyl methyl ethyl amine oxide; at least one anionic surfactant of the following: dodecyl (oxyethylene) w sulfate, wherein w represents the average number of addition moles ranging from about 1 to 10, and / or at least one polyoxyalkylene alkyl ether carboxylic acid or salt thereof represented by formula (I): RO-(AO) n‑1 -A'-COO m M(I) wherein R represents a linear and / or branched alkyl group having from about 8 to 18 carbon atoms; AO represents an alkyleneoxy group having from about 2 to 4 carbon atoms; n represents the average number of addition moles ranging from about 1 to 20; A' represents an alkylene group having from about 1 to 3 carbon atoms; M represents H or a cation; and m represents a number equal to the valence of M; - a basic source; and - water.

The invention belongs to the technical field of organic synthesis, and particularly relates to a synthetic method of a methionine NH-thioimine derivative and a polypeptide compound thereof. According to the invention, methionine ester or polypeptide molecules containing methionine ester are used as raw materials, and the methionine NH-thioimine derivative stably existing in an inner salt form or a polypeptide compound containing a methionine NH-thioimine structure is obtained through oxidative amination and one-time removal of a trifluoroacetyl protecting group and ester, so as to solve the problem of S, S-dimethyl sulfoxide. The method solves the problem that methionine thioimine cannot be widely applied due to instability of an S, S '-dialkyl thioimine structure in the prior art, realizes stable preparation of an unstable thioimine structure, is simple to operate, mild in condition and good in functional group compatibility, is suitable for preparation of various polypeptide molecules containing methionine NH-thioimine, and has wide application prospects. And a key technical support is provided for construction of a pharmacophore library containing methionine NH-thioimine.

The invention belongs to the technical field of demulsifier preparation, and particularly relates to a demulsifier for an offshore oilfield and a preparation method of the demulsifier. According to the demulsifying agent for the offshore oilfield, modified polysiloxane is used as a main demulsifying agent, tallow alkyl bis (hydroxyethyl) amine oxide and tetradecyl tributyl phosphonium bis (trifluoromethanesulfonyl) imine salt are used as auxiliary demulsifying agents, methyl-1-oleamidoethyl-2-oleyl imidazoline methyl ammonium sulfate is used as a corrosion inhibitor, ethylene bis stearamide is used as a defoaming agent, and the demulsifying agent is prepared through a one-step method. The cosolvent is a dissolution dispersion medium, the triethanolamine is a pH regulator and a corrosion inhibition synergist, and the deionized water is a continuous phase carrier; all the raw materials have a synergistic effect, so that the prepared demulsifier for the offshore oilfield has excellent dehydration and demulsification performance.

The invention relates to a preparation method of a recoverable deep-eutectic solvent adhesive with a wide temperature range, which comprises the following steps: synthesizing bola type amine oxide with different carbon chain lengths, and successfully preparing the recoverable deep-eutectic solvent adhesive with the wide temperature range by taking the bola type amine oxide as a hydrogen bond acceptor and citric acid as a hydrogen bond donor. The eutecticevaporate solvent adhesive prepared by the preparation method disclosed by the invention shows excellent comprehensive performance in engineering application. Aiming at various substrates such as glass, metal, plastic and the like, the material shows more excellent bonding capacity, and the problem that a traditional adhesive is not uniform in adhesive force among different materials is effectively solved. And a glued product is ensured to be stable in structure, the visual attractiveness can be kept, and the requirement of modern precision manufacturing on the appearance of a finished product is perfectly met.

This invention discloses a cobalt zeolite catalyst, its preparation method, and its application in the oxidation reactions of benzylamine, alcohols, and anisole sulfides, specifically relating to alcohol oxidation, amine oxidative coupling, and sulfide oxidation reactions. This invention further expands the application scope of cobalt zeolite catalysts, clarifying their suitability for the oxidation reactions of alcohols, amines, and sulfides. The catalyst is prepared via in-situ hydrothermal synthesis, and its catalytic performance can be optimized by precisely controlling pore size, cobalt species dispersion, and their existing forms. Under oxygen or air atmospheres, this catalyst can efficiently achieve highly selective oxidation of benzyl alcohols, while simultaneously promoting the oxidative coupling reactions of benzylamines and the selective oxidation reactions of sulfides. The cobalt zeolite catalyst provided by this invention has clearly defined application scenarios, mild reaction conditions, and demonstrates significant industrial application potential, providing important theoretical reference and practical direction for catalyst development in the field of green organic synthesis.

Herbicidal compositions comprising high load aminophosphate or aminophosphonate salts, in particular high load glyphosate salts, wherein the compositions comprises a surfactant mixture of at least an C 6-C 22 amine oxide and a tertiary amine surfactants. The compositions have good low temperature stability (i.e., no crystal formulation or phase separation) among other beneficial properties. (No accompanying figure)

The disclosure relates to compositions, including ready-to-use spray or wipe compositions, that are non-toxic, non-corrosive, biodegradable acidic antimicrobial compositions that exhibit broad-spectrum antimicrobial efficacy, wherein the compositions comprise an amine oxide, such as an alkyl amine oxide, in combination with an acidulant. Beneficially, the acidic antimicrobial compositions are capable of achieving at least a 3-log microbial reduction within 5 minutes under relatively mild pH conditions. The compositions provide cleaning and sanitizing.

The invention relates to the field of bath salt balls, and discloses a damp-proof bath salt ball and a preparation method thereof. The moisture-proof bath salt ball is prepared from the following raw materials in parts by weight: 40-60 parts of sodium bicarbonate; 10 to 20 parts of anhydrous sodium sulphate; 28 to 35 parts of citric acid; 30-40 parts of a moisture-proof agent; 1-3 parts of a surfactant; 1-3 parts of a humectant; 0.2 to 0.5 part of essence; 0.05 to 0.25 part of toner; the moisture-proof agent is prepared from soluble starch, bentonite, titanium dioxide and a composite tackifier; the composite tackifier is prepared from dodecyl dimethyl amine oxide, chitosan quaternary ammonium salt and polyquaternium-7. The preparation process comprises the following steps: step-by-step dispersion and sieving, and finally kneading, dispersing and profiling. The prepared bath salt ball is not easy to deliquesce in a long-term storage process, easy to dissolve in use and good in foam stability.

The invention discloses a mud spot cleaning composition containing sodium octyl sulfonate and a preparation method of the mud spot cleaning composition. The composition comprises the following components in percentage by mass: protease, lipase, sodium dodecyl benzene sulfonate, sodium octyl sulfonate, cocamidopropyl betaine, tetradecyl dimethyl amine oxide, sodium polyacrylate, tetrasodium glutamate diacetate and deionized water. Through the synergistic decomposition effect of protease and lipase and in combination with the strong decontamination ability of the anionic surfactant, organic stains and inorganic particles in the mud spots are efficiently removed, and through sodium polyacrylate, dirt is prevented from being redeposited, and hardening of the washed fabric is reduced. The preparation method comprises the steps of heating and dissolving, compounding and stirring, adding an enzyme preparation at low temperature, adjusting pH and the like, and the prepared composition has the characteristics of strong detergency, mild clothing protection, hardening resistance and good environmental protection performance, and is suitable for cleaning mud spots of various fabrics.

Concentrated controlled foaming detergent compositions for cleaning are provided. Concentrated liquid compositions including at least 40% active surfactants in the liquid composition made up of an amine oxide surfactant, an anionic sulfonate surfactant, and an alkoxylated nonionic surfactant in a concentrate that has less than about 1 ppm 1,4-dioxane are provided. Methods of using the concentrated foam-controlled compositions for dishwashing are also provided.

The present invention relates to a solution for resisting destruction of living plants and a related method. A solution including a buffered amine oxide admixed with at least one material selected from the group consisting of insecticides and fungicides is applied to the living plant and provides a synergistically effective greater resistance to living plant deterioration than any of the individual buffered amine oxide, insecticides and fungicides achieve. A related method is disclosed.

The invention relates to the technical field of lithium ion battery electrolyte, and discloses ion polarization enhanced local high-concentration electrolyte and application thereof in a lithium ion battery. The electrolyte contains a lithium salt, a solvent, a diluent and a polarization enhancing component, the polarization enhancing component is neutral molecules, and the molecular polarizability is greater than or equal to 15; the polarization enhancing component is selected from at least one of an aromatic sulfone compound, a conjugated amine oxide, a silyl-containing ether compound and an aromatic amide compound; and in the electrolyte, the concentration of the polarization enhancing component is 0.05 to 2 weight percent. The electrolyte provided by the invention has higher conductivity and lithium ion transference number, the capacity retention ratio of the prepared lithium ion battery is higher, and the high-voltage adaptability is obviously enhanced.

Aqueous hand dish composition is provided, comprising: aqueous vehicle; amine oxide surfactant; and mixture of alkyl polyglycosides comprising: linear alkyl polyglucoside of formula A R1-O-(G) n H wherein R1=linear C6-15 alkyl; n=1-5; G=glucose; and branched alkyl polysaccharide of formula B (B) wherein R2=linear / branched C3-7 alkyl; R3=linear / branched C5-9 alkyl; g=1-5; S=monosaccharide with 5-6 carbons; with proviso R1=linear C9-15 alkyl in at least some linear alkyl polyglucoside of formula A; with proviso mixture of alkyl polyglycosides comprises <15wt% compound of formula I (I) wherein R4=linear / branched C3-4 alkyl; R5=linear / branched C5-6 alkyl; G1=monosaccharide with 4-6 carbons and x=1.1-4; with proviso mixture of alkyl polyglycosides comprises 0-35wt% compound of formula III (III) wherein R6=-(CH2) m CH(CH3)2; R7=-(CH2) m+2 CH(CH3)2; G3=monosaccharide with 4-6 carbons; z=1.1-4 and m=0-3; with proviso mixture of alkyl polyglycosides comprises <3wt% compound of formula IV (IV) wherein R12=-(CH2)pCH3; R13=-(CH2) p +1CH(CH3)2; G6=monosaccharide with 4-6 carbons; p=1-4; f=1.1-10; and with proviso aqueous hand dish composition comprises <0.01wt% of anionic surfactant.

The application provides a foaming agent, a preparation method and application of the foaming agent in a natural gas well liquid discharge gas recovery process. The foaming agent comprises the following components in mass fraction: 2wt%-20wt% of a surfactant, 1wt%-20wt% of an amine oxide, 13wt%-30wt% of a carbonyl functional group-containing amine oxide, and the rest is water. The preparation method comprises the following steps: adding water into a reaction kettle, then adding the surfactant and stirring until the surfactant is completely dissolved, and then adding the amine oxide and the carbonyl functional group-containing amine oxide in sequence and stirring until the foaming agent is obtained. The foaming agent provided by the application is helpful to the formation of bubbles. In the condition of a concentration of 0.5wt%, the foam volume is sufficient, the liquid separation half-life period can well meet the standard requirement, and the foaming agent has good salt resistance. Through the introduction of the carbonyl functional group, the problem of uneven liquid film stress caused by condensate oil in the water film can be overcome, so that the foaming agent has strong oil resistance.

A hydrocarbon treatment system includes a vessel containing a hydrocarbon with sulfur contaminants comprising at least 1000 ppm hydrogen sulfide. In addition, the hydrocarbon treatment system includes a C2-C10 amine oxide present in the hydrocarbon within the vessel. The hydrocarbon treatment system also includes a recirculation stream comprising the hydrocarbon and the C2-C10 amine oxide. The recirculation stream recirculates between about one volume to about ten volumes of the hydrocarbon. Further, the hydrocarbon treatment system includes elemental sulfur formed from reaction between the C2-C10 amine oxide and the hydrogen sulfide and present in the vessel. Moreover, the hydrocarbon treatment system includes a separated stream comprising treated hydrocarbon removed from the vessel with the elemental sulfur separated therefrom.

Aqueous hand dish formulation is provided, comprising: aqueous vehicle; amine oxide surfactant; and mixture of alkyl polyglycosides comprising: linear alkyl polyglucoside of formula A R1-O-(G) n H (A) wherein R1=linear C6-15 alkyl; n=1-5; G=glucose; and branched alkyl polysaccharide of formula B (B) wherein R2=C2 alkyl; R3=linear / branched C4 alkyl; g=1-5; S=monosaccharide with 5-6 carbons; with proviso R1=linear C9-15 alkyl in at least some of the linear alkyl polyglucoside of formula A; with proviso mixture of alkyl polyglycosides comprises <15wt% compound of formula I (I) wherein R4=linear / branched C3-4 alkyl; R5=linear / branched C5-6 alkyl; G1=monosaccharide with 4-6 carbons; x=1.1-4; with proviso mixture of alkyl polyglycosides comprises 0-35wt% compound of formula III (III) wherein R6=-(CH2) m CH(CH3)2; R7=-(CH2) m +2CH(CH3)2; G3=monosaccharide with 4-6 carbons; z=1.1-4; m=0-3; with proviso mixture of alkyl polyglycosides comprises <3wt% compound of formula IV (IV) wherein R12=-(CH2)pCH3; R13=-(CH2) p +1CH(CH3)2; G6=monosaccharide with 4-6 carbons; p=1-4; f =1.1-10; and with proviso aqueous hand dish formulation comprises <0.01wt% anionic surfactant.

Using an amine oxide-type surfactant as a thickener causes a problem of a decrease in the strength of a slurry of a hydraulic composition due to mixing of bubbles. Accordingly, there is the problem that although a silicone-based antifoaming agent is added as described above, a hydrophilic thickener and a hydrophobic antifoaming agent are gradually separated after production, and performance as each of the thickener and the antifoaming agent degrades over time. Therefore, a thickener composition having excellent storage stability that maintains uniformity for a long period of time without separating the thickener and the antifoaming agent is desired.　To solve the problem, provided is a thickener composition comprising: an (A) component which is an amine oxide-type surfactant; and a (B) component which is a fatty acid glyceride.

The invention relates to a foam scrubbing agent and a preparation method thereof, and belongs to the technical field of oil and gas exploitation. The preparation method comprises the following steps: adding hydrogen peroxide into a mixed solution consisting of dodecyl dimethyl tertiary amine, tetradecyl dimethyl tertiary amine, octadecyl dimethyl tertiary amine, acrylic acid and a solvent, and reacting to generate amine oxide, so as to obtain a main agent of the foam scrubbing agent; the mass ratio of dodecyl dimethyl tertiary amine to tetradecyl dimethyl tertiary amine to octadecyl dimethyl tertiary amine to acrylic acid to H2O2 in hydrogen peroxide is (22-35): (15-25): (6-12): (5-10): (6-9); mixing the main agent of the foam scrubbing agent with the sulfamate chain extender for reaction; the mass ratio of the acrylic acid to the sulfamate chain extender in the main agent of the foam scrubbing agent is (0.35-1.1): (3-5). The foam scrubbing agent prepared by the invention can improve the recovery ratio of a gas well with high salinity and high gas condensate content, and solves the problems of water logging, output reduction and the like when the gas well productivity is extremely low in the later period of gas well exploitation.

The invention relates to a reservoir repairing-shaft cleaning integrated agent for a natural gas well and a preparation method thereof.The preparation method comprises the steps that 15-30 parts by weight of alkyl sulfate and 10-20 parts by weight of a stabilizer are added into water with the feeding weight being 1-2 times that of the stabilizer to be evenly stirred, then 5-15 parts by weight of alkyl dimethyl amine oxide is sequentially added, and the mixture is stirred to be uniform; and finally, supplementing water to 100 parts by weight, and uniformly mixing to obtain a liquid medicine which is the reservoir repairing-shaft cleaning integrated agent for the natural gas well. According to the invention, through compounding of the adaptive surfactant and the auxiliary agent, the low emulsification performance of the system is improved by utilizing a synergistic effect, and the problem that a large amount of emulsion is generated during foam drainage of a traditional foam scrubbing agent is solved.

The application relates to the technical field of building materials, in particular to a light high-strength concrete and an assembled cable well prepared by the light high-strength concrete; the light high-strength concrete comprises the following raw materials in parts by weight: 80-100 parts of Portland cement, 35-45 parts of fine sand, 20-40 parts of coal gangue, 10-20 parts of silica fume, 40-55 parts of ceramsite, 10-15 parts of glass beads, 3-5 parts of polypropylene fiber, 4-6 parts of cocoyl diethanolamide, 0.8-1.5 parts of ammonium stearate, 0.6-1 part of dodecyl dimethyl amine oxide, 5-8 parts of a functional reinforcing agent, 2-5 parts of a water reducing agent and 90-120 parts of water; the concrete provided by the application has high flexural strength, excellent impact resistance and good durability, effectively guarantees the quality of the concrete and prolongs the service life of the concrete; in addition, the assembled cable well provided by the application is assembled in a splicing mode, so that the installation process is simplified, the installation efficiency is improved, the weight is lighter, and the transportation cost is lower.

The present invention provides a detergent particle comprising from 30% to 95%, by weight of the detergent particle, of an alkyl sulfate having a branched or linear unalkoxylated alkyl group comprising from 6 to 16 carbon atoms; and from about 2% to about 50% amine oxide by weight of the detergent particle.

The application relates to the technical field of amide preparation, and discloses a method for preparing amide through photocatalytic oxidation and amination. The method comprises the following steps: under visible light irradiation, a nitrogen source is reacted with a hydrocarbon compound in the presence of a photocatalyst and an additive, and after post-treatment, amide is obtained; wherein the photocatalyst is a photoactive carbazole compound; the additive comprises alkaline substances and acidic substances; and the hydrocarbon compound is selected from one or more of C3-C11 chain alkanes, C3-C11 cycloalkanes and C3-C11 alkyl-substituted aromatic hydrocarbons. According to the method, a C-C bond in a low or medium hydrocarbon compound is directly oxidized and aminated to break and synthesize chain amide or lactam through photocatalysis. The method has mild reaction conditions, avoids the use of a high-pressure mercury lamp or other ultraviolet lamps, avoids the generation of tar and coke under ultraviolet conditions, and avoids the use of a large amount of alcohol additives such as t-butyl alcohol.

The application discloses acrylic modified silicone oil and a preparation method thereof, and the method comprises the following steps: subjecting an allyl-containing acrylate to a Michael addition reaction with a secondary amine to obtain an N,N-dialkyl-beta-alanine ester containing an allyl group; subjecting the N,N-dialkyl-beta-alanine ester containing the allyl group to a hydrosilylation reaction with a hydrogen-containing silicone oil in the presence of a platinum gold catalyst to obtain a tertiary amino modified silicone oil; subjecting the tertiary amino modified silicone oil to a reaction with an oxidant to generate an amine oxide modified silicone oil; and subjecting the amine oxide modified silicone oil to heating to undergo Cope elimination, and removing a hydroxylamine compound to obtain the acrylic modified silicone oil. The preparation method of the application effectively solves the problems of crosslinking gelation and wide molecular weight distribution in the direct hydrosilylation method through amine protection and oxidation elimination strategies, and simultaneously avoids the introduction of chloride ions in the acid chloride method and the complex equipment requirement in the ester exchange method.

The invention provides a strong degreaser composition for a polyester / spandex fabric as well as a preparation method and application of the strong degreaser composition. The strong degreaser composition is prepared from the following components in percentage by weight: 8 to 12 percent of amine oxide surfactant, 14 to 24 percent of polyol ester, 4 to 16 percent of modified aliphatic amine polyether cationic surfactant, 8 to 17 percent of fluorosilicone self-emulsifying surfactant, 0 to 6 percent of solubilizer and 32 to 64 percent of water, wherein the total weight is 100 percent. The strong degreaser prepared by the invention is low in surface tension, strong in permeation and wetting capacity, strong in oil stain emulsification and dispersion stability, capable of preventing oil stains from adhering to fabrics and equipment, thorough in oil removal, free of APEO, phosphorus, tetrachloroethylene, plasticizers and the like, and especially suitable for treating polyester and spandex blended fabrics which are high in oil content, heavy in oil stain and need to be repaired for cloth cover oil spots; oil stains can be thoroughly removed under the acidic condition, one-bath one-step oil removal and dyeing can be achieved, damage to fibers is small, and energy conservation and efficiency improvement are achieved.

Composition for multi-purpose cleaning wherein said composition comprises a product of: (a) one or more amine oxide-based surfactant; and (b) one or more glycerol ketal derivative. Process for preparing said product, wherein the process comprises the product of one or more amine oxide with one or more glycerol ketal derivative as solvent under stream of carbon dioxide and addition of peroxide oxide under semi-batch or batch reaction. Use of said composition, wherein the composition is used for preparing multi-purpose cleaning products, detergents, homecare or industrial cleaning products, washing products, as base preparations for homecare cleaning products and as base preparations for industrial cleaning products.

The invention discloses application of a nitrogen-containing surfactant as a platinum group metal precipitator and a platinum group metal recovery method, and belongs to the technical field of precious metal secondary resource recycling. The method comprises the following steps: adding a water-soluble nitrogen-containing surfactant into an acidic aqueous solution containing platinum group metal ions, carrying out a stirring reaction, standing and settling, and collecting a precipitate by adopting centrifugation or filtration; and then carrying out high-temperature heat treatment in a specific atmosphere to obtain the high-purity platinum group metal elementary substance. The nitrogen-containing surfactant is selected from one or a combination of more of quaternary ammonium salt containing aromatic side chain or short chain alkyl, alkyl quaternary ammonium salt with specific anions, amine oxide type surfactant and betaine type surfactant, and is subjected to ionic association with platinum group metal complex anions and induces aggregation and sedimentation; and high-selectivity capture of ruthenium, rhodium, palladium, osmium, iridium and platinum is realized. The method provided by the invention still has stable precipitation efficiency in a wide acidity range, and can reduce the consumption of the precipitator and the residual noble metal in the tail liquid.