5242 results about "Ethylene diamine" patented technology

Implanted catheters are locked with a solution comprising a lower alcohol, typically ethanol, propanol, or butanol, in a range from 1% to 99% by volume, and an additive in a range from 1% to 99% by volume, the additive comprising an anti-microbial, typically taurolidine or triclosan, or an anti-coagulant, typically riboflavin, sodium citrate, ethylene diamine tetraacetic acid, or citric acid. The use of an alcohol and additive solution can effectively reduce fouling of the catheter, particularly clotting and thrombus in intravascular catheters, as well as eradicate existing infections and / or reduce the risk of potential infections. Existing infections and / or potential infections can be further reduced by employing a catheter body which permits an anti-microbial solution to penetrate into the catheter body and preferably through the catheter into tissue surrounding the implanted catheter.

A membrane which can be used in membrane filtration processes and which has a reduced tendency to fouling is a polysulphone or a plyether sulphone and a polyethylene oxide / polypropylene oxide substituted diamine and can be made by a phase inversion process in the presence of pore modifying agents such as an alcohol, glycerol or glycol to give a membrane which has a pore size of 0.1.mu. to 1 micron and is hydrophilic.

The invention relates to a low-temperature scouring and bleaching promoter composition and a preparation method thereof. The composition comprises 2.5-5.5% of Tetra acetyl ethylene diamine (TAED), 0-0.5% of hydrogen peroxide decomposition catalyst, 5-15% of bleaching potentiator, 10-15% of chelating agent, 77-54.5% of carrier and 5-10% of surfactant, according to the weight percentage. The preparation method comprises the steps as follows: the carrier, the TAED, the hydrogen peroxide decomposition catalyst, the chelating agent and the bleaching potentiator are sequentially added in a powder mixer and mixed uniformly for 45-60min; subsequently, the surfactant is added and all mixtures are mixed for 15-30min and then discharged, thus obtaining the composition. The low-temperature scouring and bleaching promoter composition belongs to the environment-protective promoter composition, contains no phosphor and other substances harmful to the environmental protection, has no AOX problem, achieves the object that one promoter replaces more than four promoters, and facilitates processing and quality control.

The invention relates to a method for reducing concentrate magnesium oxide content in copper-nickel sulfide ore flotation. The method includes steps of firstly adding complexing agent oxalic acid, citric acid, tartaric acid, quadrol and EDTA (ethylene diamine tetraacetic acid), cleaning active ions of copper and nickel on the surface of magnesium-contained gangue mineral such as serpentine, removing flotation activity of sulfide ore collector such as xanthogenate, and adding composition agent to suppress gangue mineral. Ore pulp is treated by complexing agent, the flotation environment is improved, and floatability difference between copper-nickel sulfide mineral and magnesium-contained gangue mineral is increased. By combined inhibitor, serpentine and talc gangue mineral are suppressed, and magnesium-reducing effect is better; nickel recovery rate is increased to some extent as compared with that of actual production. Meanwhile, content of magnesium oxide in concentrate is reduced, and melting cost is lowered.

The invention relates to a pathological examination, in particular to a liquid-based cell preservation solution used in cytopathological examination of human cervical mucus, sputum, urine, pleural fluid, tracheal mucus and the like. It is characterized in that it is prepared from alcohols, sodium phosphate buffer, edetate disodium, sodium chloride 0.08%-0.12%, potassium chloride, formaldehyde, dithiothreitol, calcium acetate, magnesium acetate, etc. As a result, it can not only maintain the stability of the cell structure. It can reduce the agglomeration and precipitation of cell mucus and the loss of cell rupture, and can also make cells easy to stain, improve the clarity of cell preparation, facilitate the smooth progress of pathological examination, and the cost is low, which is conducive to popularization and use.

The invention relates to an inverse emulsion polymer thickener for a fracturing fluid and a preparation method thereof. The thickener is polymerized by water, 2-acrylamidyl-2-methyl sodium proparesulfonic acid liquid with mass fraction of 50%, alkyl acrylamide, acrylamide, a cationic monomer, N, N-methylene bisacrylamide, a tween-80 emulsifier, ethylene diamine tetraacetic acid disodium salt, 30% sodium hydroxide, white oil, acrylic ester, a span-80 emulsifier, sulfite, a peroxysulphate initiator, a water-soluble azo initiator and OP-15. According to the invention, raw materials are industrial products, and purification is not needed before reaction; polymerization is initiated by initiators by adding a complexing agent, and the preparation process is simple; the thickener provided by the invention is fast in dispersing, easy to prepare, free from pollution and harm, small in use level and good in stability, in particular resists high temperature of 220 DEG C, and is suitable for fracturing a high-temperature stratum; and the thickener is higher in shear resistance, can meet the fracturing construction of high flow, has high sand carrying performance, and is free from residue and is not harmful to the reservoir.

The invention relates to the soiless culture field and in particular relates to a soiless culture nutrient solution; every liter of water comprises the following components by weight: major constituents consisting of 900mg-2200mg of much EM (Effective Microorganisms) probiotics liquid, 900mg-2200mg of brown sugar, 900mg-1000mg of calcium nitrate tetrahydrate, 700mg-900mg of potassium nitrate, 150mg-220mg of ammonium dihydrogen phosphate and 300mg-500mg of magnesium sulfate heptahydrate; micro constituents consisting of 20mg-25mg of EDTA (Ethylene Diamine Tetraacetic Acid) chelated iron, 2mg-3mg of boric acid, 2mg-3mg of manganese sulfate monohydrate, 0.1mg-0.5mg of zinc sulfate heptahydrate, 0.01mg-0.1mg of copper sulfate and 0.01mg-0.08mg of ammonium molybdate tetrahydrate. The soiless culture nutrient solution provided by the invention can be used for improvising the immunity of the soiless culture nutrient solution for resisting plant diseases and insect pests of the crops.

The invention discloses a polypeptide-ammonium polyphosphate trace element liquid chelated fertilizer and a preparation method of the liquid chelated fertilizer. The polypeptide-ammonium polyphosphate trace element liquid chelated fertilizer comprises the components by weight percent: 5-25% of urea, 5-15% of ammonium polyphosphate, 5-25% of potassium nitrate, 0.2-3% of potassium silicate, 0.8-5% of potassium chloride, 0.008-0.1% of polyaspartic acid, 0.8-5% of ammonium sulfate, 0.8-5% of ethylene diamine tetraacetic acid (EDTA) calcium, 0.2-3% of EDTA magnesium, 0.02-1.5% of EDTA boron, 0.005-0.1% of EDTA zinc, 0.005-0.1% of EDTA iron, 0.005-0.05% of EDTA copper, 0.005-0.05% of EDTA manganese, 0.001-0.01% of nickel sulfate, 0.001-0.01% of ammonium molybdate, 0.0008-0.01% of cobaltous sulfate, 0.008-0.1% of polyacrylamide and the balance of water. The polypeptide-ammonium polyphosphate trace element liquid chelated fertilizer disclosed by the invention is simple in technology, scientific in proportion, balanced in fertilization, low in cost and good in effect.

The invention discloses a silicate cement grinding aid and a preparation method thereof. The silicate cement grinding aid is prepared from the following main raw materials by weight: 3-6 parts of sodium hexametaphosphate, 2-5 parts of aluminum sulfate, 5-8 parts of tetra sodium salt of amino trimethylene phosphonic acid (ATMP.Na4), 4-6 parts of ethylene diamine tetra (methylene phosphonic acid) sodium, 38-45 parts of polymeric alkylol amine, 34-42 parts of triisopropanolamine, 8-12 parts of waste engine oil, 2-5 parts of sodium alpha-olefin sulfonate, 10-16 parts of sorbitol, 15-20 parts of diethylene glycol, 8-13 parts of polypropylene wax, 6-10 parts of oxidized polyethlene wax, 4-8 parts of lignite wax, 20-30 parts of odium thiosulfate, 12-18 parts of sodium thiosulfate and 15-20 parts of quicklime powder. The prepared silicate cement grinding aid has the advantages that the quality is stable, the effect is remarkable, the adding amount is small, the use is simple, and the adding is more convenient and reliable to control.

The invention discloses a method for preparing a high-efficient organic-inorganic compound fertilizer from biogas slurry. The method comprises the following steps: a) performing solid-liquid separation on a biogas residue liquid obtained from biogas fermentation to respectively obtain a solid and a liquid; b) purifying the liquid by utilizing humic acid as a flocculant; c) removing smelly substances in the liquid by utilizing activated carbon; d) performing high-temperature sterilization on the liquid; e) reducing the temperature of the biogas slurry to room temperature and then adding organic raw materials and inorganic raw materials for mixing; f) adding EDTA (ethylene diamine tetraacetie acid) for performing complexing, and adding polysorbate-80 for stabilizing; and g) uniformly mixing to obtain the organic-inorganic liquid fertilizer. A product base liquid prepared by using the method disclosed by the invention is a fermented product which can be dissolved in water at higher speed and be absorbed by crops easier in comparison with ordinary products, further has the advantages of easiness in storage, easiness in transportation, easiness in application and good effects, and can reduce the labor intensity in the liquid fertilizer application process, reduce the agricultural ecological environmental pollution and reduce the environmental pollution caused by disordered emission of the biogas slurry in a period without fertilizer application.

The invention relates to a preparation method of 5V level anode material of a lithium ion battery, namely, ball LiNi0.5Mn1.5O4, and pertains to the energy material and novel material preparation technology field. The method includes the steps that: a liquid mixture of manganese salt and nickel salt which is prepared according to a molar ration of 3:1, reacts with dissoluble carbonate or bicarbonate water solution and ammonia or ethylene diamine water solution to obtain ball MnCO3-NiCO3, processes of centrifugal separation, washing and drying are carried out, ball Mn2O3-Ni2O3 powder is obtained by heat treatment at 400 DEG C to 600 DEG C, the ball Mn2O3-Ni2O3 powder is mixed with lithium salt compound, ball LiNi0.5Mn1.5O4 is obtained by heat treatment at 700 DEG C to 900 DEG C. The LiNi0.5Mn1.5O4 anode material obtained by the method has high purity and relatively high specific capacity; the product grain is a ball shape, with high tap density which can reach 2.2 to 2.5 g question mark cm <-3>; the ball grain can provide a beneficial condition to the further carrying out of surface coating and to the improvement of the cycle stability of the material, and has great practical value in the field of high energy density and high power lithium ion battery.

The invention discloses a preparation method of a supported FeOOH catalyst, and an electro-Fenton waste water treatment system. The invention belongs to the technical field of waste water processing. The invention is characterized in that active carbon is utilized as a carrier and ferrous sulphate is utilized as a precursor; through dipping, ethylene diamine tetraacetic acid and ammoniacal undergo an oxidation reduction reaction with active carbon and ferrous sulphate in the presence of oxygen to produce active carbon supported objects and then the active carbon supported objects are washed by deionized water and then are placed in a vacuum oven to be dried at a temperature of 40 to 50 DEG C for 10 to 12 hours to form a supported FeOOH catalyst; active components of the supported FeOOH catalyst comprise alpha-FeOOH and gamma-FeOOH; and under an applied electric field, an out-phase electro-Fenton oxidation system is composed of the supported FeOOH catalyst and hydrogen peroxide and canremove efficiently organic pollutants in waste water. The invention has effects and advantages that an out-phase catalyst can be separated from waste water easily and recycled, and an out-phase electro-Fenton oxidation system can operate in a neutral medium without need of PH adjustment and generation of chemical sludge.

The invention provides a metal surface oil and rust removal agent, and belongs to the technical field of cleaning agents. The metal surface oil and rust removal agent comprises the following components by weight: 2 to 4 parts of hydrochloric acid, 5 to 10 parts of phosphoric acid, 3 to 6 parts of oxalic acid, 3 to 5 parts of glacial acetic acid, 2 to 4 parts of citric acid, 3 to 4 parts of polyvinyl alcohol, 1 to 2 parts of hexamethylene tetramine, 2 to 3 parts of ethylene oxide, 1 to 2 parts of glyoxal, 2 to 3 parts of magnesium stearate, 2 to 4 parts of glycerol, 2 to 4 parts of thiourea, 2 to 4 parts of ammonium molybdate, 1 to 2 parts of polyaspartic acid, 2 to 4 parts of EDTA-Na2, 1 to 2 parts of ethylene diamine tetra sodium, 1 to 3 parts of poly maleic acid sodium, 2 to 3 parts of HEDPA, 2 to 6 parts of surface active agent and 70 to 100 parts of water. The metal surface oil and rust removal agent is convenient to use, and removes light rust for about 2 minutes and heavy rust for 6 to 7 minutes, and the oil removal rate can reach more than 97%.

The invention provides a water-soluble imidazoline amide corrosion inhibitor, a preparation method thereof and a using method thereof, and belongs to the technical field of oil refining. The corrosion inhibitor consists of the following components in percentage by mass: 10 to 30 percent of water-soluble imidazoline amide, 0 to 15 percent of ethylene diamine, 0 to 20 percent of ammonia water with a mass concentration of 25 to 28 percent, 0 to 20 percent of ethanol and 40 to 90 percent of water, wherein the water-soluble imidazoline amide is prepared by the amidation reaction and the ring-closing reaction of polyethylene polyamines, glacial acetic acid and fatty acid serving as raw materials and toluene serving a solvent. When the corrosion inhibitor is continuously added to the top part of a primary distillation tower, the top part of a atmospheric distillation tower, the top part of a vacuum distillation tower or the top part of a hydrogenation fractional distillation tower of an oil refinery, the corrosion of a HCL-H2S-H2O medium on the top part of the tower is inhibited, and simultaneously, the quality of products on the top part of the tower is not affected. In the method for preparing the corrosion inhibitor, water is used as the solvent, so that the method has the advantages of being safely used, having low cost and facilitating the addition of a neutralizing agent.

The invention discloses a compound fertilizer comprising straw, weathered coal, peat soil, phosphorite powder, wheat middling, EDTA (Ethylene Diamine Tetraacetic Acid), potassium fulvate, rice hull powder, sweet potato powder, mixed strain powder and urea. The compound fertilizer is capable of increasing yield and improving soil for a long term and inhibiting soil-borne diseases and is low in cost, simple in process and free of residue and pollution, so that the compound fertilizer has a good popularization and application prospect.

The invention discloses a kit for determining glycocholic acid in human blood. The kit comprises a reagent A, a reagent B and a calibrator for glycocholic acid with known concentration, wherein the mass ratio of the reagent A to the reagent B is (1-5):1; the reagent A comprises a microorganism inhibiting agent, EDTA (Ethylene Diamine Tetraacetic Acid), glycerol, albumin bovine serum, a surface active agent, a reactive reinforcing agent, sodium chloride and a Good's buffer solution with the pH of 6-8; and the reagent B comprises the microorganism inhibiting agent, the EDTA (Ethylene Diamine Tetraacetic Acid), the glycerol, the albumin bovine serum, the surface active agent, the reactive reinforcing agent, sodium chloride, the Good's buffer solution with the pH of 6-8 and nanoparticles crosslinked with a glycocholic acid monoclonal antibody. The kit is simple, convenient and fast in detection and operation, can be used for simultaneously and quickly determining a large amount of samples and has good detection accuracy and sensitivity.

The invention discloses a water culture nutrient solution prescription of a lettuce and a preparation method of the water culture nutrient solution prescription, and belongs to the technical field of plant soilless culture of the agricultural science. The nutrient solution prescription of the lettuce comprises the following components: a fertilizer A composed of 584.23g / T of calcium nitrate, 421.34g / T of potassium nitrate and 47.8g / T of ammonium nitrate; a fertilizer B composed of 182.4g / T of monopotassium phosphate and, 256.23g / T of magnesium sulfate; a fertilizer C composed of 16.8g / T of FeEDTA (Ethylene Diamine Tetraacetic Acid), 3g / T of boric acid, 2g / T of manganese sulfate, 0.25g / T of zinc sulfate, 0.85g / T of copper sulfate, and 0.38g / T of ammonium molybdate; hormone composed of 0.1g / T indolebutyric acid of or 0.1g / T of naphthylacetic acid; a bactericide composed of 15g / T of carbendazim; and nutrient solution pH (Potential Of Hydrogen) adjusting acid composed of 200ml / T of phosphoric acid or 150g / T of citric acid. The prescription is nutritionally balanced, so that the demand of the lettuce to nutrition can be met, the amount of used nutrient elements is decreased at the same time, the output of the lettuce is increased, and the fertilizers are saved; and the prescription effectively decreases the contents of nitrates in the lettuce under the water culture, improves the quality of the lettuce, enables the simplification of the complicated processes in preparation based on the demand of the actual operation, and is suitable for being used for meeting the requirements of industrialization production.

The invention discloses a sulfate-free hair cleanser and a preparation method thereof. The sulfate-free hair cleanser comprises the following concrete formulation components in percentage by weight: 1-40% of anionic surfactant, 0.1-25% of nonionic surfactant, 0.1-15% of ampholytic surfactant, 0.1-5% of cationic conditioner, 0-2% of cocamidopropyl MEA (Mono Ethanol Amine), 0-2% of cetyl alcohol, 0-1% of EDTA (Ethylene Diamine Tetraacetic Acid)-disodium, 0-3% of anti-dandruff agent, 0-5% of pearling agent, 0.1-3% of conditioning component, 0-5% of polydimethylsiloxane, 0.1-2.0% of essence, 0.01-1% of preservative, 0.01-1% of pH adjusting agent, 0.01-1% of viscosity adjusting agent and 0.01% of natural extract. The invention relates to the technical field of daily chemical industry. The hair cleanser has the characteristics of more mildness to scalp, less irritation and capability of more caring the scalp in the hair washing process.

The invention discloses an antitranspirant foliar fertilizer and a preparation method thereof. The antitranspirant foliar fertilizer comprises the raw materials of copper sulfate, ethylene diamine tetraacetic acid, monopotassium phosphate, zinc sulfate, ferrous sulphate, manganese sulphate, ammonium molybdate, composite rare earth, boric acid, sodium dodecyl sulphonate, urea, fulvic acid, hexanoic acid 2-(diethylamino) ethyl ester, compound amino acid, magnesium sulfate, calcium nitrate, ethylene diamine tetraacetic acid, microbial agent, azone and ammonia water. The antitranspirant foliar fertilizer provides nutrient elements and microbial agents which are required by the growth of plants, the rare earth and amino acid and other beneficial elements, can promote the growth of the plants, improve the yield, the quality, the stress resistance of the plants and the absorbing and operating capabilities on trace elements, simultaneously can effectively reduce the transpiration of the plants and is applied to afforesting in arid regions.

The present invention provides a resist pattern thickening material and the like which can thicken a resist pattern and form a fine space pattern. The resist pattern thickening material contains: a resin; a crosslinking agent; and at least one type selected from cationic surfactants, amphoteric surfactants, and non-ionic surfactants selected from alkoxylate surfactants, fatty acid ester surfactants, amide surfactants, alcohol surfactants, and ethylene diamine surfactants. In a process for forming a resist pattern of the present invention, after a resist pattern is formed, the thickening material is applied onto a surface of the pattern. A process for manufacturing a semiconductor device of the present invention includes: after forming a resist pattern on an underlying layer, applying the thickening material on a surface of the pattern so as to thicken the pattern; and a step of patterning the underlying layer by etching by using the pattern.

The invention provides a soil conditioner. The soil conditioner is prepared from the following raw materials in parts by weight: 0.15 part of water-soluble nano-silicon dioxide, 0.2 part of anionic polyacrylamide, 0.02 part of grondverbeteraar, 0.2 part of 50 percent calcium cyanamide, 0.05 part of abamectin, 0.05 part of 30 percent calcium chloride, 0.02 part of borax, 0.01 part of EDTA-Fe (ethylene diamine tetraacetic acid-Fe), 0.15 part of carboxymethyl cellulose, and 0.2 part of high-activity silicon-calcium-magnesium-potassium fertilizer. The soil conditioner has the function of improving soil and, and realizes improvement and fertilization of soil in one step by adding trace elements, bacteriostatic agent and the like.

The invention discloses a procalcitonin (PCT) latex enhanced immunoturbidimetry detection kit and a preparation method thereof. The procalcitonin latex enhanced immunoturbidimetry detection kit comprises a reagent R1 and a reagent R2, wherein the reagent R1 mainly comprises a buffer solution 1, a stabilizing agent 1, a preservative 1, a coagulation increasing agent, a protective agent 1 and EDTA (Ethylene Diamine Tetraacetic Acid); the reagent R2 mainly comprises a buffer solution 2, a stabilizing agent 2, a preservative 2, a polystyrene latex microballon sphere, a PCT antibody and a protective agent 2; the particle size of the polystyrene latex microballon sphere in the reagent R2 is 100-600nm, the PCT antibody is one or more of a mouse anti-human PCT antibody, a goat anti-human procalcitonin antibody or a rabbit anti-human procalcitonin antibody, and the PCT antibody is connected with the polystyrene latex microballon sphere in a covalent coupling or physical absorption manner. Compared with the prior art, the PCT detection kit provided by the invention has the advantages of low preparation cost, good stability, high detection sensitivity and strong specificity, is easy to store, and is easily popularized in clinical.

This invention provides a method for inhibiting the corrosion of sulfur-containing circulating cooling water. The method comprises: controlling the alkalinity of sulfur-containing circulating cooling water at 250-350 mg / L, and adding composite corrosion inhibitor 5-40 times of leaked sulfur ions in sulfur-containing circulating cooling water. The composite corrosion inhibitor comprises: organic corrosion inhibitor (one or more of hydroxyethylidene-1,1-diphosphonic acid, hydroxyphosphonoacetic acid, aminotrimethylene phosphonic acid, ethylene diamine tetramethylene phosphonic acid, 2-phosphono-1,2,4-tricarboxylic acid-butane and its potassium salt or sodium salt, polyol phosphate, and polyether alcohol amine phosphate) 2-24 wt.% and water 76-98 wt.%. The method has obvious effect on treating sulfur-containing circulating cooling water without changing the reagents used, and can control leaked sulfur ion concentration to 2mg / L and carbon steel corrosion rate to below 0.075 mm / a.

The invention relates to a method for preparing a water polyurethane adhesive applied to shoes, pertaining to the technical field of polymers. A proper amount of first polyatomic alcohol, second polyatomic alcohol, third polyatomic alcohol and fourth polyatomic alcohol are mixed to achieve polyurethane prepolymers; a proper amount of triethylamine is added for neutralization; the prepared polyurethane prepolymers is dispersed into deionized water and added with surface-active agent to achieve water polyurethane dispersoid; a proper amount of ethylene diamine is added into the water polyurethane dispersoid for chain expanding reaction to achieve water polyurethanes; the acetone is removed by vacuum pressure reduction, and finally mixed with antioxidant, ultraviolet absorbent, leveling agent, antifoaming agent, wetting agent, thickening agent and silane coupling agent to achieve the water polyurethane adhesive. The invention provides a simple process, needs a small dosage of organic solvent, the solid content is above 50 percent, the energy consumption of production is relatively low; besides, the adhesive has excellent bonding strength to various shoe materials such as PVC, polyurethane, leather, SBS, canvas, rubber and so on, and the heat-resistance effect is strong.

The invention discloses a method for preparing quaternary amine salt ion adsorbent by using a plant with high cellulose content. Straw stalks with high cellulose content, epichlorohydrin and tri-ethylamine are taken as raw materials, ethylene diamine, diethylene triamine pentacetic acid (DTPA) or triethylenetetramine, etc are used as crosslinking agent to prepare the adsorbent under the condition of existence of N, N-dimethyl formamide. The method has the advantages of simple process, low cost, economic and practical, reproducible, etc. The adsorbent prepared by the method has the advantages of high liveweight growth rate, low secondary pollution, high stability, sound adsorption effect, wide application scope, etc; and the adsorbent can be extensively applied to the treatment of eutrophication of waters.

The invention relates to a laundry sheet which comprises film former, sodium olefinsulfonate, coconut oil base methyl glycollic amide, coconut oil amide propyl lycine, ethylene diamine tetraacetic acid tetrasodium salt, preservative, filling material, white oil, essence, pigment and deionized water. The laundry sheet is prepared by the following steps: evenly mixing the raw materials according tomass parts, carrying out film formation by drying to a obtain paper type laundry sheet, cutting, punching, packaging and the like. The invention implements paper type laundry detergent in the aspect of physical shape, maintains the washing effect of the traditional laundry detergent, has the characteristics of less foam and high efficiency, and can be completely dissolved in water; the laundry sheet is convenient to store and use, and avoids the overflow problem in the common laundry detergent, thereby avoiding mess and difficulty in cleaning due to overflow of the laundry detergent; and the laundry sheet is convenient to, overcomes the defect that the traditional laundry detergent has heavy volume and can not be conveniently carried and stored after being opened, thereby providing convenience for clothes cleaning for people on a journey. The laundry sheet is free of any environment-polluting component, and can be completely degraded naturally, thereby making a contribution to environmental protection.

Derivatives useful in the protection of living organisms against damage due to free radical reactions derived from methoxypolyethylene glycols (MPEG), which are modified by chemically attaching chelating groups in an amide or amine linkage to the nonmethyl end of the polymer. Such chelating groups include ethylene-diamine tetraacetic acid (EDTA), diethylene triamine pentaacetic acid (DTPA), and ethylene glycol aminoethyl ether tetraacetic acid (EGTA), and pharmacologically acceptable salts or esters thereof.

The invention provides equipment for restoring heavy-metal-polluted soil by the combination of a leaching method and an oxidation method. The equipment comprises a leaching column, an oxidation tube, a first circulating pump and a second circulating pump, wherein the leaching column is internally provided with the polluted soil; a sieving mesh is arranged under the polluted soil, and a leaching nozzle is arranged above the polluted soil; the lower end of the leaching column is connected with a buffering groove, and the oxidation tube is connected with an absorbing tube; one end of the first circulating pump is connected with the buffering groove, and the other end of the first circulating pump is connected with the oxidation tube; one end of the second circulating pump is connected with the absorbing tube, and the other end of the second circulating pump is connected with a spraying tube. The equipment and the method provided by the invention have the advantages that since EDTA (Ethylene Diamine Tetraacetic Acid) is used as a leaching agent, heavy metal in the soil can be removed in a high-efficiency and fast manner, and the difficulties that the cost of the agent is large, the secondary pollution is caused and the subsequent treatment is relatively troublesome are overcome; by compounding of organic acid and a small amount of additive, the desorption and the solubilization of the heavy metal in the soil are enhanced, the application range of leaching liquid is expanded, a combined body of the leaching liquid and the heavy metal is easily absorbed for separation by an absorbing agent, and no secondary pollution to the environment is caused.

The invention relates to a method for preparing fluorescent silica nanospheres and belongs to the technical field of inorganic chemistry and material synthesis. The main process of the method of the invention mainly comprises: (1) according to the prior art, calcining a certain amount of ethylene diamine tetraacetic acid (EDTA-2Na) at 250 to 400 DEG C in the presence of N2 in a tube furnace to obtain fluorescent carbon quantum dots; (2) mixing the fluorescent carbon quantum dots, deionized water, octadecylamine and methylbenzene, reacting at 160 to 180 DEG C for 12 hours, centrifuging, separating, collecting supernate and drying to obtain octadecylamine-modified fluorescent carbon quantum dots; and (3) mixing the octadecylamine-modified fluorescent carbon quantum dots with water, ethanol,ammonia water and ethyl orthosilicate, reacting at 40 DEG C for 1 to 12 hours, adding the ethyl orthosilicate and the hexadecy ltrimethyl ammonium bromide, reacting for 1 to 12 hours, washing with ethanol, centrifuging, drying and calcining at 300 DEG C for 3 hours and thus obtaining the fluorescent silica nanospheres.

The invention relates to a preparation method of a starch grafted copolymer inverse emulsion for a drilling fluid. The method comprises the following steps of: adding an emulsifier sorbitan monooleate into white oil, and stirring, dissolving and introducing nitrogen to obtain an oil phase; dissolving potassium hydroxide in water, adding 2-acrylamidyl-2-methyl propanesulfonic acid, acrylamide, a vinyl monomer, a cationic monomer, polyoxyethylene sorbitan monooleate, ethylene diamine tetraacetic acid disodium salt and starch, and stirring to obtain an aqueous phase; adding the aqueous phase into the oil phase, adequately emulsifying, adjusting the pH value, introducing nitrogen, adding an initiator and a reducing agent; and stirring, heating, insulating heat, cooling, discharging and filtering under nitrogen protection to obtain the starch grafted copolymer inverse emulsion for the drilling fluid. The product serving as a drilling fluid treatment agent has good de-filtration effect, good thickening effect, a flow type regulating effect and good inhibition effect for dehydrating dispersion of clay and drillings, so that the quality of filter cakes is improved, the lubricity of the drilling liquid is improved and the processing cost of the drilling liquid is lowered, and the preparation method is suitable for various types of water-based drilling fluids.