553results about How to "Use low concentration" patented technology

The composite oil-displacement agent consists of polymer 0-0.3 wt.%, surfactant 0.05-0.6 wt% and water 99.1-99.95 wt%, and is produced in kettle reactor with coagulated petroleum fraction from raw oil. It has surfactant concentration not higher than available systems, high interface tension reducing effect and stable performance. The ternary composite oil-displacement agent has no alkali and saltwhile reaching superlow interface tension and thus no alkali scale formed, no loss in polymer viscosity and viscolerasticity. In the compounding of the composite oil-displacement agent, common sewagemay be used and this produces certain environment protection effect.

The present invention discloses a liquid high-effective disinfectant. It is formed from (wt%) 1-2% of hyamine which is the mixture of alkyl dimethyl benzyl ammonium chloride and dialkyl dimethyl ammonium chloride, 0.1-0.5% of biguanide which is one of chlorhexidine and polyhexamethylene biguanide salt or their mixture, 3-8% of aldehyde which is one of glutaraldehyde, citrial, jasminal and myristic aldehyde or mixture of more than two kinds of them, 5-10% of surfactant, 1-5% of urea, 40-50% of hydrophilic solvent, 0.1% of EDTA sodium salt, 2.5-35% of water and 0-3% of selectable components, such as aromatic compound, colouring matter and viscosity-regulating agent.

Biocidal compositions comprises an effective amount of a biocidal agent such as a quaternary ammonium compound or a blend of quaternary ammonium compounds and an effective amount of a cellular membrane disruptor. The synergy index of the biocidal agent and the cellular membrane disruptor is less than 1. The biocidal compositions can further comprise an effective amount of a chemical stabilizer and other optional components such as a nonionic surfactant. Methods for making and utilizing such biocidal compositions are also disclosed.

The invention relates to an oil-displacing agent and an oil-displacing method for enhancing the recovery ratio of high-temperature, high-salinity and high-hardness reservoir crude oil. The oil-displacing agent is composed of the following components in percentage by mass: A, 0.05-0.07% of an amine oxide type amphoteric surfactant; B, 0.15-0.20% of alkylphenol ethoxylate carboxylate; and C, the balance of water. The oil-displacing method disclosed by the invention is implemented through injecting the oil-displacing agent into a natural core subjected to oil-displacing under the conditions that the oil reservoir temperature is 100-120 DEG C, the total salinity of formation water is (10-15)*10<4> mg/L, and the amount of calcium-magnesium divalent metal ions is 7000-10000 mg/L, so that residual oil is in contact with the oil-displacing agent, and then the residual oil is fully displaced. The oil-displacing agent provided by the invention reaches the magnitude order of 10<-3> mN/m under the condition of high-temperature, high-salinity and high-hardness salt reservoirs, and the interfacial tension still can be maintained in an ultra-low interfacial tension state after the oil-displacing agent is aged for a long time under the condition of oil reservoirs, therefore, the oil-displacing agent is applied to the tertiary oil recovery production of oil fields.

The invention discloses a nano-molybdenum sulfide antibacterial material and a synthetic method thereof and application thereof. The synthetic method comprises the following steps: (1) dissolving polyethylene glycol solid in water, performing ultrasonic processing in an ultrasonic pool until the polyethylene glycol is dissolved completely, adding ammonium heptamolybdate solid, and performing ultrasonic processing until the ammonium heptamolybdate is dissolved completely to obtain a mixed solution; and (2) dissolving thiourea solid in water, dissolving the thiourea with stirring, adding the dissolved thiourea into the mixed solution, stirring the mixture, putting the mixture into a hydrothermal reactor having a polytetrafluoroethylene inner container, sealing the reactor, and performing heating reaction to obtain a black precipitate which is the nano-molybdenum sulfide antibacterial material. The invention also provides the nano-molybdenum sulfide antibacterial material which is prepared by the synthetic method. The invention also provides application of the nano-molybdenum sulfide antibacterial material on synergistic anti-microbial combining biomimetic catalysis hydrogen peroxide and near-infrared optothermal. The nano-molybdenum sulfide antibacterial material prepared by the synthetic method in the invention has high yield, and can be captured easily by bacteria. Moreover, the antibacterial effect of the material is obviously better than that of single biomimetic catalysis anti-microbial or single near-infrared optothermal anti-microbial.

The invention provides a temperature resist, salt resist crosslinked polymer system with controllable crosslinking time and strength, comprising water, polyacrylamide, melamine, formaldehyde and additive, wherein the polyacrylamide 0.03-8 weight%, melamine 0.01-4 weight%, formaldehyde solution(35-38weight%) 0.03-10 weight%, additive <2 weight%. The salt content of oilfield sewage is less than 35 *104mg/L, the total content of Ca2+ and Mg2+ is less than 5000mg/L. The temperature range of reservoir bed is 30-110 degree, the crosslinking time is 6 hours-25 days, and the viscosity after crosslinking is less than 40*104mPa.s. The long-term stability is good. The viscosity is greatly increased compared to oil displacement of polymer, suitable for reducing the use concentration of polyacrylamide and the cost is reduced, at the same time the oil displacement effect is increased and the treatment difficulty of output liquid is reduced. The crosslinked polymer system can be useful for recycling the polyacrylamide output liquid of high concentration. The invention can be used in oilfield profile controlling, exclusion of water, leak stopping and oil displacement technique. The locale preparation is simple.

The invention provides a compound guanidine disinfectant, which comprises the following ingredients in percentage by weight: 0.5 to 4.0 percent of guanidine disinfectants, 0.05 to 0.2 percent of low-molecular-weight chitosan, 0.5 to 2.5 percent of high-molecular-weight chitosan, 0.1 to 0.5 percent of Chinese herbal medicine extracts, 0.1 to 1.0 percent of surfactants, 0.1 to 1.0 percent of penetrants, 0.1 to 0.5 percent of skin protectants, 0.1 to 0.5 percent of macromolecule film forming agents and the balance water; and the pH value of the compound guanidine disinfectant is regulated to 7.0 to 7.5 by pH regulating agents. Through the proportional combination of all the ingredients of the compound guanidine disinfectant, a good synergistic effect is achieved; and good sterilization and antibiosis capability is realized on bacterial reproductive bodies, fungi and partial viruses. The invention also provides a preparation method of the compound guanidine disinfectant. The compound disinfectant has the advantages that the preparation process is simple; the operation is convenient; the production cost is low; the scale production is convenient; meanwhile, the property of the disinfectant is stable; and the compound disinfectant is safe and nontoxic and can be easily stored.

The invention relates to a low-dosage guar multinuclear cross-linking agent for the field of petrochemical engineering, the low-dosage guar multinuclear cross-linking agent is prepared from water, polyhydric alcohol, polyol, carbohydrate, boron compound and inorganic acid salt. The preparation method of the cross-linking agent comprises the following steps: putting water, polyhydric alcohol and polyol in a reactor to heat to 60 DEG.C, reacting for 90-120min, and then adding a boron compound, carbohydrate and the inorganic acid salt, warming to 80-90 DEG.C, reacting for 3-6 hours, regulating pH to 8-10 by using sodium hydroxide, reacting for 1-3 hours to obtain the low-dosage guar multinuclear cross-linking agent. The low-dosage guar multinuclear cross-linking agent is capable of providing a plurality of cross-linking centers, the use concentration of the guar can be greatly reduced, the concentration of the guar is reduced to more than 30% of conventional system dosage, the dosage of the cross-linking agent is less, and the cross-linking is delayed, the damage of the guar system fracturing fluid to the stratum is obviously reduced, and the use performance of the fracture fluid is guaranteed.

The invention relates to a coagulation-reducing viscosity-reducing agent for high-coagulation thickened oil. By weight percentage, the coagulation-reducing viscosity-reducing agent for the high-coagulation thickened oil comprises the following materials: 0.1% to 0.2% of anion polyacrylamide, 5% to 10% of sodium acrylate-setanol acrylate copolymer, 5% to 15% of sodium dodecyl benzene sulfonate, 1%to 2% of mixture of hexafluoropropylene oxide dipolymer amide sulphobetaine and hexafluoropropylene oxide dipolymer amide amine oxide, 1% to 2% of sodium hydroxide and the balance water. The coagulation-reducing viscosity-reducing agent can disperse high-coagulation thickened crude oil, reduces the freezing point of the crude oil to above 0 DEG C and enables the viscosity of the crude oil to be smaller than 300mPa*s at the normal temperature. The using concentration of the coagulation-reducing viscosity-reducing agent can be controlled at 0.1% to 0.5%, is lower by one magnitude order than that (3% to 7%) of a traditional surfactant, is not limited by hydrophile-lipophile balance values and phase inversion temperature (PIT) and can emulsify the high-coagulation thickened oil at the temperature above the freezing point of the crude oil.

The invention discloses a 1,3,4-oxadizaole structure unit-containing Rhodamine B pH fluorescence probe, the structure of which is shown as the formula (I) in the specification. The invention further discloses applications of the probe to monitoring the change of pH values and specifically marking lysocome in living cells. The probe does not emit fluoresce under the neutral and alkaline conditions; after the pH value is smaller than 7, the fluorescence intensity is fast enhanced along with the reduction of the pH value and can achieve the maximum value when the pH value is about 4.4; the pH sensitivity of the fluorescence detection ranges from 6.7 to 4.4, and the fluorescence intensity and the pH are in linear relation from pH 4.7 to 5.7; good capability of interference resistance to various metal ions can be achieved under acidity condition; and the probe is very suitable for monitoring the pH value under the complicated interior environment of the living cells in real time, especially specifically marking lysocome and monitoring the change of pH value in the lysocome.

The invention discloses a clean fracturing fluid which comprises crude rubber fluid, viscosity accelerant and gel breaker, the crude rubber fluid comprises the following materials by mass percent: 0.1%-0.5% of hydrophobic association polyacrylamide, 0.05%-0.2% of organic acid, 0.1%-0.8% of clay stabilizer and the balance of water; the viscosity accelerant comprises the following materials according to mass percent: 0.05%-0.4% of alkyl amine oxide, 0.1%-0.5% of Gemini surfactant, 0.1%-1.0% of alkyl lower alcohol, 0.05%-0.4% of pH regulator, and the balance of water; the volume ratio of the crude rubber fluid to the viscosity accelerant is 100:(5-10), and the mass of the gel breaker is 0.005%-0.05% that of the clean fracturing fluid. The invention further provides a preparation method of the clean fracturing fluid. The long-term technical problems of high cost and poor temperature resistance performance of the clean fracturing fluid are solved.

The invention relates to a separation and efficient amplification culture method for an antigen specific T lymphocyte. By means of the immunomagnetic bead technology and the character of an active T cell expression CD137, the antigen specific T lymphocyte is separated from a complex cell mass; then an antigen specific T lymphocyte with high tumor killing activity is obtained through in-vitro efficient amplification culture. CD137L (CD137-ligand), IL-7, IL-15 and IL-2 are added in the culturing process, so that the phenomenon that activated and induced cells are liable to apoptosis in the culturing process is avoided, the amplification time is increased, and the killing activity of the antigen specific T lymphocyte is improved.

The invention belongs to the technical field of industrial water treatment, and particularly relates to an environmental protection type composite dirt dispersion agent used for oil field water flooding treatment. The dirt dispersion agent takes polyasparagic acid, polyepoxy sodium succinate and hydrolyzed polymaleic anhydride as effective components; and the total content of the effective components is no less than 35 percent. The weight ratio of the effective components of polyasparagic acid: polyepoxy sodium succinate: hydrolyzed polymaleic anhydride is 4-12.5:1-5: 5-9. The environmental protection type composite dirt dispersion agent is phosphorus free, innocuous and biologically degradable, and has low use cost. The environmental protection type composite dirt dispersion agent can effectively prevent the sedimentation of calcium carbonate, calcium sulphate and barium sulphate, and is suitable for the dirt dispersion treatment in an oil field water flooding system.

The invention discloses a rhodamine B targeted lysosome pH fluorescent probe with a cysteine ethyl ester structure, wherein the rhodamine B targeted lysosome pH fluorescent probe has the structure as shown in a formula (I). Meanwhile, the invention discloses an application of the probe as a living cell lysosome pH fluorescent probe. Experiments show that the probe provided by the invention does not generate fluorescence under the neutral and alkaline conditions, the fluorescence intensity is rapidly enhanced along with the reduction of the pH value of the solution, is up to the maximum value when the pH value is about 4.0 and is enhanced by about 150 times when the pH value ranges from 7.51 to 3.53, and the probe has favorable antijamming capability and reversibility in the presence of various metal ions. An intracellular colocalization experiment and an interlysosome pH regulation experiment prove that the probe can specially mark a lysosome and sensitively monitor the small change of the interlysosome pH value. A cell survival rate experiment shows that the probe is nontoxic to cells, which indicates that the probe disclosed by the invention has an important application value in the aspects of imaging the cells and monitoring the change of the interlysosome pH value.

The invention relates to a normal temperature spraying detergent for aluminum alloy and a preparation method thereof. The detergent comprises the following raw materials in percentage by weight: 1 to 5 percent of ethylene diamine tetraacetic acid, 0.5 to 1.5 percent of sodium metasilicate pentahydrate, 5 to 8 percent of sodium gluconate, 5 to 10 percent of heterogeneous alcohol ether, 2 to 7 percent of solubilizing agent, 3 to 8 percent of surfactant, and the balance of water. The detergent can be used at normal temperature, and does not need heating so as to save the energy; the detergent does not corrode the treated aluminum alloy parts, does not leave white spots on the surfaces of the parts, and can increase the brightness of the parts; and the detergent has long service life and low using concentration, is safe and environment-friendly, saves the working time, and improves the working efficiency.

The invention discloses a preparation method of a depolymerized and dispersed viscosity reducer of heavy oil. The preparation method comprises selecting N,N-Dimethyloctadecylamine as a hydrophobic group monomer, and diethylene triamine, epoxy chloropropane and benzyl chloride as hydrophilic group monomers, and ethanol as a solvent. The preparation method sequentially comprises the following steps: (1) adding the N,N-Dimethyloctadecylamine (N,N-Dimethylhexadecylamine) and the ethanol to a reaction vessel with a stirring device, evenly mixing and keeping the mixture at constant temperature for 0.5h; (2) slowly dripping the epoxy chloropropane with a dropping funnel to the reaction vessel, heating to 70 DEG C-75 DEG C, and reacting for 1-4h to generate HDI-1; (3) dripping the epoxy chloropropane to the diethylene triamine at room temperature to generate HDI-2; (4) allowing reaction products in (3) and (2) to react to generate HDI-3; and (5) dripping the benzyl chloride with the dropping funnel to the HDI-3, evenly stirring the mixture, and reacting at increased temperature of 90-95 DEG C for 2-5h to obtain the target product HD.

The invention relates to a viscosity reducer by emulsification for heavy oil. The viscosity reducer comprises the following components: a nonionic surfactant, an anionic oligomeric surfactant, alcohol and water; the alcohol is C1-C8 alcohol, the anionic oligomeric surfactant comprises a structure shown in the formula (I), wherein n is any integer from 1 to 6, R is alkyl, and M is at least one from Li+, Na+ and K+. The viscosity reducer by emulsification for heavy oil has the advantages of good viscosity reducing effects for heavy oil, good salt resistance, low usage concentration, and low cost; alkali is not needed during usage, and the viscosity reducer by emulsification for heavy oil is suitable for stratum which is sensitive to alkali.

The invention provides a high effective synthetic inhibitor for inhibiting the formation of gas hydrate which is prepared by using polyvinylpyrrolidone, polyether amine and ethylene glycol butyl ether in combination according to a weight ratio of 1:1:1. When using, the total mass concentration of the inhibitor is 0.2-2.0%. The inhibitor of the invention is mainly used to inhibit the formation of natural gas hydrate in gas-oil pipelines and can be also used in oil-gas field exploitation systems. The inhibitor has obvious inhibition effect, low dosage and little damage to the environment so that the inhibitor has the advantage of high efficiency, economy and environmental friend.

The invention discloses a glycine betaine surfactant composition system and a purpose thereof. The glycine betaine surfactant composition system comprises one or more mixtures of a glycine betaine surfactant and an anionic surfactant. The glycine betaine surfactant comprises alkyl dimethyl betaine, alkyl amide propyl dimethyl betaine, alkyl sulphobetaine and alkyl hydroxy sulphobetaine. The use concentration ratio of the glycine betaine surfactant and the anionic surfactant, by 100% pure activity, is 1:0.1-10. The glycine betaine surfactant composition system is used for chemical displacement of reservoir oil, and enables the oil deposit of an oil well in which secondary oil-production efficiency in the later period is decreased seriously to be developed by 10-15%, and the economic efficiency is very obvious. Moreover, the use concentration is low, and cost is lowered greatly. Due to the fact that other conventional alkalis are of no need, the select face of polymers is made to be wider, and the significance for protecting natural resources is great.