56results about How to "Reduce adsorption loss" patented technology

A method for increasing the recovering rate of crude oil includes preparing the mixed solution from polyacrylamide, foaming agent and water, and proportionally filling said mixed solution and gas or N2 in the water injecting well alternatively by the alternative period of 20 days.

The invention relates to a method for recovering the valuable metals in a waste nickel-cobalt-manganese-lithium ion battery by an ion exchange method, which comprises the following steps of disassembling, discharging and crushing the waste nickel-cobalt-manganese-lithium ion battery, leaching, replacing the leachate with nickel powder or cobalt powder to remove the copper, and hydrolyzing with a valuable metal alkali solution as a neutralizer to remove the iron and aluminum; regenerating the chelating resin with a lithium hydroxide solution, adsorbing the nickel, cobalt and manganese in the impurity-removed solution, and backwashing with sulfuric acid to obtain a nickel-cobalt-manganese mixed solution; and recovering the lithium in the liquid after resin adsorption in the form of lithium hydroxide. According to the method, the stripping and leaching of the waste nickel cobalt lithium manganate ion battery are completed in one step, the impurity elements are not introduced during the leachate impurity removal and valuable metal separation and extraction process, the lithium hydroxide used for ion exchange resin is regenerated via the lithium hydroxide, at the same time, the nickel-cobalt-manganese is absorbed, so that the lithium is prevented from being adsorbed and entering a nickel, cobalt and manganese solution to be lost, and the lithium recovery is prevented from being influenced due to the high sodium ion content in the solution with the sodium hydroxide. According to the present invention, the recovery rate of nickel, cobalt and manganese reaches 98% or above, the recovery rate of lithium reaches 90% or above, the technological process is short, the equipment is few, and the cost is low.

The invention relates to a preparation method of a low-permeability reservoir oil-displacing agent. A one-pot method is used for synthesizing; an aliphatic ester and alcohol amine are used as reactants to react under the effect of an alkaline catalyst with the specific ratio, and do not need to be separated to directly prepare an oil-displacing agent product; the oil-displacing agent has high interface activity and oil-phase adaptability; and in a range of mineralized water of 40-130 DEG C and 3000-50000ppm and under the condition of no need of additionally adding a surfactant and an alkali, oil / water interface interfacial tension values of crude oil from different producing areas can be ultralow and be 10<-3>mN / m and can reach 10<-5>mN / m at minimum. The oil-displacing agent disclosed by the invention can resist a high temperature and high salts; an applicable condition is wide; and the oil-displacing agent has a better application prospect on the aspect of development of a low-permeability reservoir.

The invention relates to a compound oil-displacing agent containing asymmetric di-long chain alkylmethyl carboxyl betaine and application thereof, and belongs to the technical field of chemical oil displacement. The asymmetric di-long chain alkylmethyl carboxyl betaine is prepared by adopting fatty acids with different chain lengths and monomethylamine as original raw materials by means of amide reduction and carboxymethylation, and a molecular formula of the asymmetric di-long chain alkylmethyl carboxyl betaine is abbreviated as Cm+nB, wherein m is not equal to n. Compared with the symmetric di-long chain alkylmethyl carboxyl betaine identical in main alkyl chain length, the asymmetric betaine basically maintains high surface activity of the symmetric betaine, but the water solubility of the product is remarkably improved, and the adsorption onto the surface of rock is obviously lowered. The interface tension between C7-C9 n-alkanes and Daqing formation water and between Daqing crude oil and Daqing formation water is respectively reduced to 10<-3>mN / m and 10<-2>mN / m by virtue of C18+6B single component; the asymmetric di-long chain alkylmethyl carboxyl betaine is compounded with a symmetric homologous series and a single-long-chain alkyl-dimethyl carboxyl betaine, the interface tension of Daqing crude oil / formation water is lowered to 10<-3>mN / m in a wide range of total concentration.

New cationic asphalt emulsifier tetraethylenepentamine / formaldehyde modified lignin-amine can be synthesized by one step reaction of alkali lignin, tetraethylenepentamine and formaldehyde, and best reaction process conditions for synthesis of the asphalt emulsifier can be obtained. The CMC value of the target product is 4.26 x 10<-4>mol / L, and is small. Under the critical micelle concentration (CMC), the surface tension is 29.11mN / M. The synthetic emulsifier is a fast cracking type asphalt emulsifier, and can be widely used in the adhesive layer, fog seal layer, non solvent cold mixing, recycling of asphalt and asphalt pavement substrate stabilizing.

The invention discloses a nonionic / cationic composite asphalt emulsifier, OP-10 is reacted with epichlorohydrin to obtain a nonionic intermediate, the nonionic intermediate is reacted with alkylamine, and by chemical reaction, the nonionic surfactant is connected with the alkyl amine for synthesis and preparation of the nonionic / cationic composite asphalt emulsifier. The nonionic / cationic composite asphalt emulsifier is a slow cracking type asphalt emulsifier, and has good emulsifying properties and storage stability on different sources of asphalt and under different pH, and asphalt emulsion performance can reach technical requirements of emulsified asphalt used in roads in technical specification JTG F40-2004 for construction of highway asphalt pavements.

Disclosed is a method for reducing the component loss and formation damage in a high-temperature combined chemical flooding process. By the adoption of the method, a composite system which comprises organic alkali ethanolamine, a surface active agent SH-6 and a polymer of partially hydrolyzed polyacrylamide is used for conducting oil flooding operation in an oil layer at the temperature ranging from 85 DEG C to 95 DEG C, wherein the concentration of the organic alkali ethanolamine ranges from 3000mg / L to 12000mg / L, the concentration of the surface active agent SH-6 ranges from 2000mg / L to 4000mg / L, and the concentration of the partially hydrolyzed polyacrylamide ranges from 1000mg / L to 2500mg / L. The damage of the composite system to a formation and the adsorption loss of the polymer and the surface active agent can be reduced under the condition of a high-temperature oil reservoir and the condition that the ASP composite system is enabled to achieve ultralow interfacial tension, and therefore the application range of the ASP composite system is further broadened, and the foundation basis and the technical thinking are provided for application of a high-temperature combined flooding system.

The invention discloses an eluent for a pesticide-DDT in black soil and an eluting method of the eluent. The eluent disclosed by the invention is composed of a non-ionic surfactant, an anionic surfactant, inorganic salt, an organic additive and a solvent. The specific composition of the eluent is as follows: the mass ratio of the non-ionic surfactant-twain 60 to the anionic surfactant-sodium dodecyl sulfate in the eluent is (1-3) to 1, the total concentration of the two is 3000-4000mg / L, the concentration of the inorganic salt-K2SiO3 or K2CO3 in the eluant is 1.0g / L, the concentration of the organic additive-n-propanol or n-butyl alcohol in the eluent is 1.0-2.0mol / L, and the solvent is water.

The invention belongs to the technical field of the chemical industry and relates to a method of recycling valuable metals in waste lithium cobalt oxide batteries through the ion exchange method. Themethod comprises the steps of discharged crushing, peeling and leaching of the waste lithium cobalt oxide batteries, impurity removal of a leaching solution, adsorption and desorption of cobalt resinand preparation of lithium hydroxide. The method is simple and efficient. Through the method, the valuable metals in the waste lithium cobalt oxide batteries can be recycled easily in batches. Moreover, the method is simple, low in equipment requirement, easy to operate and high in recovery rate.

The invention discloses a rapid making method for all-natural fruit wine. The rapid making method comprises unit operation steps as follows: careful selection and detection for fruits as raw materials, impurity removing, cleaning and disinfection, crushing, inoculated fermentation, wine liquid and peel pomace separation, after-ripening and clarification, pouring into jars for obtaining clarified wine, detection and obtaining of a finished product. Different from a traditional method, the method is short in technological process and simple and convenient to operate, production cycle of the fruit wine is shortened by 70% or higher, the fruit wine with pleasant aroma, complete wine body, complex flavor, unique style, strong typicality, remarkable bouquet, obvious fruit flavor and long quality guarantee period can be made in 45-50 days without artificially adding preservatives or other additives, and health physiochemical indexes and hygienic indexes of the fruit wine are remarkably better than those of fruit wine meeting national or international standards. The whole process from the inoculated fermentation to the finished product output is executed in a closed multifunctional fruit wine making system, so that time and labor are saved, the efficiency is high, the cost is low, and the method is energy-saving and environment-friendly and has obvious benefits.

The invention relates to a preparation method of a novel cation asphalt emulsifier, which takes xylene as a solvent, takes lauric acid and divinyl triammonium as raw materials, mol ratio of lauric acid to divinyl triammonium is 2: 3, amidation and cyclodehydration reactions are carried out for 5-6 hours at a temperature of 120-260 DEG C, excessive divinyl triammonium is removed through vacuum distillation to obtain the light-yellow transparent lauric acid imidazoline product, and the yield is no less than 93%. According to the invention, imidazoline product is reacted with a sodium chloroacetate solution to prepare the imidazoline quaternary-ammonium-salt ampholytic surfactant , CMC value of the target products is 4.56*10<-4>mol / L, value is small; and surface tension under critical micelle concentration is 26.43mN / m. The synthesized emulsifier is the slowing breaking asphalt emulsifier, which can be used for a bonding layer, a fog sealing layer and solvent-free cold mixing, and used for recovery / utilization of asphalt and bituminous pavement base stabilization.

The invention relates to preparation and application of a double long-chain alkyls-containing sulphonate type anionic surfactant and belongs to the field of colloidal and interfacial chemistry. The surfactant is derived from a renewable raw material, has very good interface activity, and is particularly suitable for reducing crude oil / water interface tension. When an aqueous solution contains weak base Na2CO3 with the mass fraction being 0.5 percent, the surfactant can reduce Daqing crude oil / formation water interface tension to be ultralow in the total surfactant concentration range of 0.1 mM to 10 mM by compounding with a plurality of conventional surfactants. A formula which takes the surfactant as a main surfactant also has excellent oil sand adsorption resistance; when the initial total concentration is 10 mM, ultralow surface tension can still be obtained after the surfactant is added into Daqing oil sand for adsorbing for 11 times continuously in the solid / liquid mass fraction ratio being 0.1 / 0.9. The surfactant is an excellent weak base-surfactant-polymer compound driven surfactant.

A soybean polypeptide powder without bitter taste is prepared through mixing soybean protein with distilled water, grinding, regulating pH value and temp. adding neutral proteinase, enzymolyzing, deactivating enzyme, regulating pH value and temp. adding pancreatin, enzymolyzing, deactivating enzyme, filter, adding kaolinite powder, adsorption, adding activated carbon powder, adsorption, and vacuum drying. Its advantages are no bitter taste and high quality.

N-[2-hydroxy-3-octadecyl amino] propyl trimethyl ammonium chloride (A) is respectively compounded with lignin quaternary ammonium salt (B) to obtain complex emulsifier AB, when the complex emulsifier AB dosage is 0.4% of the total amount of emulsified asphalt, and the emulsifier A / B (molar ratio) is 0.7 / 0.1, the emulsified asphalt has good storage stability, and the emulsified asphalt can be widely used in the adhesive layer, fog seal layer, non solvent cold mixing, recycling for asphalt and asphalt pavement substrate stabilizing.

The invention discloses a composite oil displacement agent for increasing the recovery ratio of a low-permeability reservoir. The composite oil displacement agent comprises polyacrylamide, an initiator, styrene, an active polymer dispersing agent, ethanol and water. A preparation method comprises the following steps: dissolving the styrene in ethanol, and uniformly stirring to obtain a solution A;dissolving the initiator into 8-15 times of water to obtain a solution B; dissolving the polyacrylamide and the active polymer dispersing agent in the rest of water to obtain a solution C; putting acontainer containing the solution C into a water bath, heating until the temperature is stable, then adding the solution A, and uniformly stirring; and then dropwise adding the solution B at a constant speed in a nitrogen protection environment in a stirring state, and continuously stirring for 2-3 hours after dropwise adding is finished. The oil displacement agent can reduce the oil-water interfacial tension and change the oil reservoir wettability, and has the advantages of small adsorption capacity on the surface of oil reservoir rock, small adsorption loss, low use concentration, low cost,high oil displacement rate and the like.

The invention discloses a rapeseed oil new cationic asphalt emulsifier synthetic method, according to the method, a cationic asphalt emulsifier is prepared from rapeseed oil, acid anhydride and mixed amine as raw materials, a new asphalt emulsifier is synthesized by two step reaction of the cationic asphalt emulsifier, and the optimum synthesis reaction conditions of the asphalt emulsifier can be obtained. The CMC value of the target product is 4.89 x 10<-4>mol / L, and is small. Under the critical micelle concentration (CMC), the surface tension is 25.28 mN / m. The synthesized emulsifier is a medium cracking type asphalt emulsifier, and can be widely used in the adhesive layer, fog seal layer, non solvent cold mixing, recycling of asphalt and stabilizing of asphalt pavement substrate.

The invention belongs to the technical field of wine making and particularly relates to patent applications for natural fruit wine and a making method thereof. The making method includes quick makingand slow making, wherein the quick making includes the steps of careful selecting and inspecting, inoculating and fermenting, liquor and peel separation, maturing, ageing in a jar, inspecting, and finishing; the slow making includes the steps of careful selecting and inspecting of raw fruits, inoculating and primary fermenting, liquor and peel separation, post-fermenting, ageing in an ageing jar,clarifying in natural mode, precipitating and separating, cold treatment, solid-liquid separation, stable treatment, ageing in an oak barrel, clarifying, inspecting, and finishing. The natural fruit wine and the making method thereof provided herein have the advantages that the natural fruit wine which is free of preservatives, long in shelf life and better in quality is provided, the making method of the natural fruit wine is also provided, and new references are provided for the development of fruit wines and related industries.

The present invention discloses a gemini surfactant, which has a general formula represented by a formula (I), wherein the general formula of R1 comprises a general formula (a) and / or a general formula (b), R is selected from C8-C20 alkyl, preferably C12-16 alkyl, n is 0-5, preferably 0-2, the value of x is any one selected from 1-8, and 2y+z is any one selected from 2-8, preferably 2-6. The present invention further discloses a preparation method and a use method of the gemini surfactant. The general formulas I, a and b are defined in the specification.

The invention relates to a method for repairing DDTs contaminated soil by using a composite lotion, and application thereof, and belongs to the technical field of environmental chemistry. According to the invention, the absorption of plants to DDTs and the degradation of the plants in rhizosphere soil are improved by utilizing the solubilizing effect of the synergistic composite lotion compounded by the surfactant Tween80 and the green organic solvent ethyl lactate on strong-hydrophobicity DDTs in a manner of promoting the plants to repair the DDTs polluted soil through the synergistic composite lotion; and the synergistic composite lotion is regularly applied to soil in a spraying mode, meanwhile, the moisture content of the soil is strictly controlled, the percolation phenomenon is avoided, plant growth is facilitated, mixing, conveying and uniform distribution of effective components in the synergistic composite lotion are facilitated, the risk of secondary pollution is reduced, and the remediation efficiency is improved. The method has the advantages of being economical, efficient, easy to operate, wide in applicable soil type, capable of achieving in-situ remediation, small in influence on the original environment, capable of reducing the risk of secondary pollution and beneficial to soil recycling.

The invention discloses a pollution-depth degradation method of high-concentration chloronitrobenzene in soil by combination of solubilization and fenton oxidation of a mixed surface active agent. The pollution-depth degradation method comprises the following steps: preparing and mixing aqueous solution of sodium dodecyl benzene sulfonate of an anionic surface active agent with certain concentration and a non-ionic surface active agent Tween -80 aqueous solution, putting polluted soil into the solution of the mixed surface active agent, and separating and discharging the solution of the mixed surface active agent after full contact reaction; adding a certain amount of water into the polluted soil after solubilizing treatment, mixing uniformly to prepare soil turbid liquid, and adjusting the pH value of the soil turbid liquid to be acid; adding ferrous sulfate for complete dissolving, then adding hydrogen peroxide slowly for stirring reaction, and after the reaction is finished, standing and discharging the upper-layer aqueous solution after the soil particles are completely sunk to the bottom layer. With the adoption of the surface active agent for solubilization, the pollution-depth degradation method disclosed by the invention has the advantages that high-concentration organic pollution can be economically removed, and the pollutant removing effect can be further optimized by the subsequent fenton oxidation. The pollution-depth degradation method is simple and easy and is suitable for large-scale production and use.

The invention discloses an organic porous nanoparticle / surfactant composite oil displacement system and a preparation method thereof. The composite oil displacement system comprises organic porous nanoparticles and a surfactant, and the preparation method comprises the steps of evenly dissolving the surfactant in water to form a surfactant solution; and adding the organic porous nanoparticles intothe surfactant solution according to the ratio, and carrying out ultrasonic dispersion to obtain the organic porous nanoparticle / surfactant composite oil displacement system. The preparation method is simple and low in cost; through the interaction of the organic porous nanoparticles and the surfactant, the two effects of reducing the adsorption loss of the surfactant and enhancing the oil displacement effect of the surfactant can be achieved at the same time; in addition, the composite oil displacement system has good temperature resistance and salt resistance, can be used as an oil displacement agent in an oil field environment under the conditions of wide mineralization degree from low mineralization degree to high mineralization degree and wide temperature from low temperature to hightemperature to improve the crude oil recovery rate, and has a wide application prospect.

The invention provides synthesis of a Gemini type cationic asphalt emulsifier--1,3-{N-[3-dodecyloxy polyoxyethylene ether(9)-2-hydroxy]propyl dimethyl}propane from aliphatic polyoxyethylene ether AEO-9, epichlorohydrin, dimethylamine and 1,3-dibromopropane. The Gemini type cationic asphalt emulsifier is used for preparing emulsified asphalt. The test results of the emulsified asphalt show that the prepared emulsified asphalt can be stably stored for 5 days when the usage amount of the emulsifier is 2.5% of the total amount of the emulsified asphalt. The Gemini type cationic asphalt emulsifier provided by the invention can be extensively applied to adhesive bonding layers, fog sealing layers and solvent-free cold mixing, and is used for recycling of asphalt and stabilization of a asphalt pavement base.

The invention relates to the field of environmental protection, in particular to an immobilized microbial soil remediation agent and a soil remediation method thereof. The immobilized microorganism soil remediation agent is prepared by taking charcoal as a carrier, and the microorganism remediation agent has a good remediation effect on soil polluted by polycyclic aromatic hydrocarbon. According to the immobilized microorganism soil remediation agent, microorganisms are immobilized in a limited space area, so that the concentration of microorganism cells is increased, high biological activityof the microorganism cells is kept, and the concentration of useful substances such as amino acid, organic acid and antibiotics secreted by the microorganisms and the biological catalysis effect are improved; bacterial strain colonization is facilitated, and degradation of pollutants is promoted; according to the method, a small amount of protein source is loaded in activated carbon to facilitatesurvival and proliferation of microorganisms; solid waste resources are effectively applied to contaminated soil remediation, and the method is a win-win environment-friendly means; and the soil remediation method has the advantages of being convenient to operate, low in cost, environmentally friendly and good in effect.

The invention relates to the field of combination of flowing injection woven reactors and flame atom absorption spectrographs and particularly relates to a flowing injection disconnected eight-way valve adsorption preenrichment elution method. The method comprises the following steps: combining a flowing injection disconnected eight-way valve and a flame atom absorption spectrum method, feeding samples, namely a sample solution to be tested, a complexing agent solution and air, into a woven reactor through an input pipeline in a flowing injection manner, inputting an air flow into the woven reactor to implement emptying, inputting an elution agent into the woven reactor for elution, and detecting in a flame atom absorption spectrograph. Compared with the prior art, the method is relativelyhigh in precision and accuracy, and measurement errors are reduced.

The invention discloses a high-efficiency adsorption and dearomatization modified activated carbon and application thereof and belongs to the field of activated carbon preparation. The preparation method of the high-efficiency adsorption and dearomatization modified activated carbon comprises performing cooperative treatment on activated carbon with nitric acid and sulfuric acid and filtering anddrying the treated activated carbon to obtain the modified activated carbon capable of efficiently selectively adsorbing aromatic amino acid. The high-efficiency adsorption and dearomatization modified activated carbon can be well applied to preparing high-Fischer-ratio oligopeptides with more than 20 branched chain amino acids / aromatic amino acids, greatly reduce the adsorption loss when appliedto the branched chain amino acids and meanwhile help obtain oligopeptides with a high Fischer ratio. The preparation method of the high-efficiency adsorption and dearomatization modified activated carbon is simple in operation, mild in treating process and high in modification efficiency.

The invention relates to a high-efficiency clean extraction method of complete camellia seed oil and tea saponin. The method includes the step that clean recycled water and deionized water or a reverse extraction mode are used for extracting the camellia seed oil and the tea saponin from complete camellia seed kernel slurry. Crude camellia seed oil and strong tea saponin liquid are obtained through centrifugal separation. The crude oil is separated to remove mechanical impurities and subjected to dewatering treatment, the complete original ecological camellia seed oil which does not need refining is obtained, and the oil yield can reach 93% or above. After part of water is evaporated and recycled from the strong tea saponin liquid through an efficient energy-saving MVR technology, alcoholis added for treatment, the mechanical impurities and glue-soluble impurities are removed, and after the clarified alcohol-containing tea saponin liquid is distilled through a closed-loop evaporator and the alcohol is recycled, the product continues to be dewatered and dried to obtain the tea saponin with the purity higher than 60% and clean recycled water which can be used for next extraction.

The invention discloses an eluent for benzo[a]pyrene in soil and an elution method thereof. The eluent for benzo[a]pyrene in soil is composed of a nonionic surfactant, an anionic surfactant, an inorganic salt and a solvent. The nonionic surfactant is Tween-80; the anionic surfactant is sodium dodecyl sulfate; a mass ratio of Tween-80 to sodium dodecyl sulfate is 3-4: 1; the total concentration of Tween-80 and sodium dodecyl sulfate in the elute is 4.0 to 5.0 g / L; the inorganic salt is K2SiO3 or K2CO3, and the concentration of K2SiO3 or K2CO3 in the elute is 1.0 g / L; and the solvent is water.

The invention provides a surfactant composition for oil extraction in an oil field and a preparation method thereof. A pH responsive surfactant of which the charge can be reversibly converted under a preset pH value and of which the type can be converted among three anionic-amphoteric-cationic surfactants is compounded with a surfactant auxiliary agent formed by mixing conventional mesoporous silica nanoparticles and hydrophobic mesoporous silica nanoparticles; and the surfactant composition for oil extraction in the oil field is obtained, wherein the surfactant composition has high stability, can realize rapid demulsification, can disperse large oil drops into small oil drops, and can intelligently regulate and control the stability, particle size and flowability of the oil drops. By utilizing the mutual synergistic effect of the pH response type surfactant and the auxiliary agent mesoporous silica nanoparticles, the conversion among different surfactant types in the same oil displacement system can be realized, the surfactant composition can be widely applied to different oil extraction environments, and the crude oil recovery ratio is comprehensively improved by utilizing the conversion among different types of surfactants.

The invention relates to a novel asphalt emulsifier by using rosin, chloropropylene oxide and diethylenetriamine through a two-step reaction, and an optimum reaction technology condition for synthesizing the asphalt emulsifier is obtained. According to the invention, CMC value of a target product is 4.89*10<-4>mol / L, the value is little; and the surface tension under critical micelle concentration is 25.28mN / m. The synthesized emulsifier is the median-cracking type asphalt emulsifier, can be widely used for a bonding layer, a fog sealing layer and solvent-free cold mixing, and can be used for recovery and utilization of asphalt and stabilization of an asphalt pavement base layer.