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

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 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.

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 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.

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 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 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 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.