437results about How to "Strong chelating ability" patented technology

The invention relates to a phosphorus-free corrosion and scale inhibitor, which is prepared from sodium molybdate, zinc salt, citrate, triethanolamine, benzotriazole (BTA), polyaspartic acid (PASP), polyepoxysuccinic acid (PESA), AA / AMPS terpolymer, solid alkali and water. The phosphorus-free corrosion and scale inhibitor inhibits corrosion of metals by forming oxidization type and precipitation type films on the surfaces of the metals, has the effect of inhibiting scale through chelation and dispersive action on salts causing scale in cooling water, is non-toxic and phosphorus-free, has easily biodegradable major organic compositions, does not cause environmental pollution and is not limited by phosphorus in emission.

The invention relates to heavy metal resistance plant growth-promoting bacteria and a preparation applying method thereof, which belongs to the bioremediation field of heavy metal polluted environment. A bacteria strain D54 with a preservation number of CGMCC No. 3223 belongs to the Burkholderia sp. and has higher resistance to a plurality of heavy metals, wherein the resistances to Pb <2+>, Cd <2+>, Cu <2+>, Zn <2+> respectively reach 800 mg / L, 1500 mg / L, 150 mg / L and 2500 mg / L. In addition, the bacteria strain D54 has the plant growth-promoting functions of producing plant growth hormone (IAA), producing 1-amino-1-carboxyl cyclopropane (ACC) deaminase, secreting siderophore, dissolving inorganic phosphate, fixing nitrogen and the like, has the biological prevention functions of antagonizing plant pathogenic bacteria inbreak and the like, and can obviously improve the biomass of the plants applied the invention and improve the resistance to diseases and stresses. The number of the effective viable bacteria in liquid preparation reaches 1-2 billion / ml and the number of the effective viable bacteria in solid preparation reaches 1 billion / g. Soaking seeds for 1-2 hours in the liquidpreparation which is diluted 100 times and irrigating the diluted liquid preparation 1-2 times (10ml / kg) after 2-3 weeks of the sprouting of the seeds can effectively improve plant viable bacteria infection probability.

The invention discloses alkali lignin carboxylate and a preparation method thereof. A prescription of the modified raw material comprises the following components in parts by mass: 200 parts of alkali lignin, 20-50 parts of activating agent and 40-80 parts of carboxylic reagent; and the alkali lignin is bamboo pulp or straw pulp paper-making black liquid acid precipitating alkali lignin and has the solid content of 95 percent by mass. In the preparation, the alkali lignin is used as a main raw material, the activating agent and the carboxylic reagent are added, and the alkali lignin carboxylate is obtained by activating and electrophilic substitution reaction under basicity. By means of the preparation method, the water-soluble high molecule carboxylate is prepared by using alkali lignin with wide raw material source; and the prepared alkali lignin carboxylate has higher carboxyl content, favorable water solubility and strong surface activity. The alkali lignin carboxylate prepared by the preparation method disclosed by the invention has favorable hydrophilicity and surface activity, and the carboxyl contained in the molecules of the alkali lignin carboxylate has favorable chelating performance; and the alkali lignin carboxylate can be used as a functional auxiliary agent to be applied to a plurality of industrial fields and is a novel water-soluble lignin derivative.

The invention provides a metal salt-free sealing agent for an aluminum alloy anodic oxide film, belonging to the technical field of aluminum alloy anodic oxide film post treatment. The sealing agent of the invention is prepared by water solution composed of 1.0-10g / L of a hydration accelerator, 0.01-2g / L of a wetting agent, 0.01-3g / L of an ash inhibitor and 1-15g / L of a pH buffering agent, wherein the pH of workpiece fluid is 5.5-6.5, the operating temperature is 70-90 DEG C, and the sealing speed is 1.0-2.0min / um. The metal salt-free sealing agent creatively adopts organic compounds which are easily subject to biodegradation, does not contain any metal ions of nickel, cobalt, magnesium, calcium, lithium and the like as well as fluorinions, and obtains satisfactory sealing effect of the nano-pores of the aluminum alloy anodic oxide film by virtue of the scientific and coordinated component formula of the water solution; the aluminum alloy anodic oxide film obtained by seal treatment through the sealing agent has the advantages of good corrosion resistance, capability of meeting the requirements of GB 14952.1-94, good light-protection and color-protection properties of a film layer, no ash and pruina, no water stain after drying as well as light flowing color and small color difference change in case of sealing the organic dyeing film; and the metal salt-free sealing agent is widely applicable to sealing treatment of an original-color anodic oxide film, an electrolytic coloring anodic oxide film, a hard oxide film and a dyeing anodic oxide film.

The invention discloses washing liquid used in the semiconductor industry to wash plasma etching residues. The washing liquid contains citric acid / citrate buffer solution, fluorides, macromoledular corrosion inhibitor, anti-freeze agent and solvent. The washing liquid can effectively wash the plasma etching residues during the process of manufacturing a semiconductor, have low etching velocity on nonmetals and metal substrates such as Si, SiO2, tetraethoxy silane silicon dioxides (PETEOS), low-medium materials, Ti, Al, Cu and so on, is safe and harmless to the environment and the human body, and has good application prospect in the microelectronic field such as washing of semiconductor wafers and so on.

The invention relates to a scale and rust remover used for cleaning main frame of central air-conditioner. It is characterized in that it comprises solid mixture and liquid inhibitor; said solid mixture comprises amidosulfonic acid, polyphosphinic acid chelating agent, silicofluoride scale and rust dissolution promotor, non-ionic surface activator aliphatic alcohol polyester penetrant, their weight proportions in order are as follows: 75%-85%, 5%-10%, 5%-10%, 1%-5%; said inhibitor is liquid and comprises hexamethylene tetramin, aniline and methyl azimido-benzene according to weight proportion of 2: 2: 1. Said inhibitor is added into acidic washing solution with its weight amount being 0.3% of that of water amount. The product can dissolve carbonate, silicate, sulfate and iron oxide, the descaling speed at room temperature is fast, and is increased within 60 Deg. C, the corrosive rate to metal is pretty low, and there is no acid mist and harmful gas generation during desaling process.

The invention relates to the technical field of textile printing and dyeing and provides a low-temperature soaping agent. The low-temperature soaping agent can soap surface dyeing of a dyed object at a lower temperature (60 DEG C), is not easy to foam, can chelate metal ions, has stronger combined dyeing capability and effectively prevents from staining. Meanwhile, the invention further provides a method for preparing the low-temperature soaping agent and an application of the low-temperature soaping agent. The low-temperature soaping agent is prepared from the following components in percentage by weight: 50-75% of maleic-acrylic copolymer, 5-15% of a surfactant, 0.1-0.5% of a de-foaming agent, 1-5% of ethanediamine di-o-hydroxyphenyl sodium acetate and the balance of de-ionized water.

The invention relates to a method for preparing a chitosan separation medium suitable for protein purification, which comprises the following steps of: (1) dispersing acetic acid solution of chitosan into liquid paraffin with stirring to form chitosan particles in the presence of cyclohexane serving as a porogen and a small amount of span80, and further cross-linking the chitosan particles to form a chitosan skeleton under the action of glutaraldehyde serving as a cross-linking agent; (2) swelling the chitosan skeleton, and reacting a hydroxyl group on the chitosan skeleton with epoxy chloropropane in dimethyl sulfoxide (DMSO) / NaOH mixed solution to introduce an epoxy group into the chitosan skeleton so as to obtain a grafted chitosan skeleton; and (3) adding iminodiacetic acid (IDA) / NaOHmixed solution into the grafted chitosan skeleton, reacting at the temperature of between 20 and 80 DEG C for 1 to 10 hours, and performing suction-filtration to obtain the chitosan separation medium. The chitosan separation medium solves the leakage problem of metal ions to a large extent, has the advantages of process stability, high repeatability and the like, and is suitable for mass production.

The invention discloses a modified sodium lignin sulfonate chelating agent containing a phosphonic acid group and a preparation method thereof. The preparation method comprises the following steps: preparing 30-40 mass percent of aqueous solution from sodium lignin sulfonate powder; adding a phenolic substance, regulating the pH value of the system to 8-10, and reacting at the temperature of 90-100 DEG C for 0.5-1 hour by adopting the microwave power of 300-1200W; taking out the reaction solution, adding epoxy chloropropane and short-chain alkyl polyamine, heating in a normal pressure water bath, and reacting at the temperature of 70-80 DEG C for 1-2 hours; cooling to the temperature of 30-40 DEG C, adding a phosphorous acid crystal, and uniformly stirring and mixing; and cooling to the temperature of 30-40 DEG C, dripping a formaldehyde solution, heating to the temperature of 80-100 DEG C, and reacting for 2-4 hours, thereby obtaining the modified sodium lignin sulfonate chelating agent. The chelating agent molecule contains lots of hydroxyl radicals, carboxyl, amido and phosphonic acid groups, can form compound coordination with zinc, copper, lead, nickel and other divalent metal ions and has high chelating ability.

The invention relates to a method capability of stabilizing the burnt ash in the garbage, belonging to the technical field of environmental engineering. The invention is characterized in that: dialkyl dithiophosphate compounds or dialkyl dithiophosphate compounds added with flocculants are used as the stabilizing agent; the stabilizing agent is dissolved in water, making a solution; then the solution is added by the burnt ash and mixed evenly, forming a condensed mixer; the mixture is buried after dried naturally. The weight ratio of the dialkyl dithiophosphate compounds to the flocculants in the stabilizing agent is 100:4 to 100:10; the weight ratio of the dialkyl dithiophosphate compounds to the burnt ash in the garbage is 0.5:100 to 3:100, and the weight ratio of water to the ash is 0.7 to 1.0:1. The invention has the advantages that: the chelating ability of the dialkyl dithiophosphate compounds with the heavy metal ions is strong; the price is low; the leaching concentration of the ash after the stabilization under pH1 to 13 can meet the identification standards of hazardous wastes, and secondary pollution is not caused.

The invention provides a preparation method of an organic chelate fertilizer. The preparation method comprises the steps that (1) typha angustifolia and crop straw are cleaned, crushed and mixed; compound bacterium liquid and a sodium bicarbonate solution are added; stirring and sealing fermentation are conducted; a potassium hydroxide solution is added; humic liquid is obtained; (2) compound amino acid and inorganic salt of medium trace elements conduct chelation reaction with the humic liquid; a pH value is adjusted by an acid solution to be 5-6; temperature rise and stirring are conducted for reaction; the pH value is adjusted by an alkaline substance to be 7; a chelation product solution is obtained; (3) a nitrogenous fertilizer, a phosphate fertilizer, a potash fertilizer and water are added to a mixer by weight percentage, and mixed uniformly; pelleting slurry is prepared; and (4) the chelation product solution and the pelleting slurry are driven into a guniting neutralization geosyncline, mixed uniformly, transferred to a pelletizer for guniting and pelleting, and dried, and then the organic chelate fertilizer is obtained. The organic chelate fertilizer prepared by the method is small in application amount, high in stability, and high in plant absorptivity.

The invention discloses a 6-aryl amido hexyl hydroximic acid collecting agent and preparation and application methods thereof. 6-aryl amido hexyl hydroximic acid represented by a formula (I) is taken as a collecting agent and utilized in flotation of tungsten ore, tombarthite ore, tin ore or bauxite, wherein R represents H or C1-8 alkyl. 6-aryl amido hexyl hydroximic acid and sodium hydroxide, potassium hydroxide or ammonium hydroxide are put into water to prepare an aqueous solution of 6-aryl amido hexyl hydroxyoximate; a flotation reagent is added for size mixing during an ore grinding and / or flotation process, the added reagent at least contains the aqueous solution of 6-aryl amido hexyl hydroxyoximate, and the dosage of 6-aryl amido hexyl hydroximic acid ranges from 100g / t to 3,500g / t; and useful metallic minerals are floated out through a froth flotation method, and the flotation recovery rate can be increased by 2%-5%.

The invention discloses a novel nuisanceless foliage fertilizer which is characterized in that every 100 parts by weight of the novel nuisanceless foliage fertilizer comprises the components according to the parts by weight: 10.0-30.0 parts of biochemical fulvic acid, 25.0-40.0 parts of urea, 20.0-35.0 parts of monopotassium phosphate, 0.5-2.0 parts of ammonium molybdate, 1.5-4.0 parts of borax, 0.8-2.0 parts of bluestone, 0.1-0.5 part of matrine, 3.2-7.5 parts of auxiliary agent and the rest of filling material. A method for preparing the novel nuisanceless foliage fertilizer comprises: all the components are mixed according to the measurement, fully stirred by a stirrer and ground, and packed according to the measurement. The foliage fertilizer has multiple effects of promoting the growing development of crops, increasing both production and income, improving the quality, increasing nutrient utilization rate, controlling pests, no pollution and the like, and is especially suitable for the production of nuisanceless agricultural products. The foliage fertilizer has remarkable application effect, simple manufacturing technique, great market potential, obvious economic and social benefits and very wide application prospect.

The invention relates to a preparation method of a nano-silver coating of chitosan modified fabric. According to the preparation method, the nano-silver coating is formed on the chitosan modified fabric or textile through silver ion adsorption and in-situ reduction by amino groups and hydroxyl groups on the surface of chitosan under the condition that no reducing agent is added, the silver supporting capacity of the fabric reaches 0.1-200 mg Ag / m<2> and 1-50 mg Ag / g, and the sizes of nano-silver particles are 5-20 nm. The nano-silver particles are uniformly distributed in the fabric and has good dispersity and excellent antibacterial performance. The preparation method is simple in process, needs no reducing agent and is environment-friendly, low in cost and suitable for mass production. The prepared fabric provided with the nano-silver coating has broad application prospects in antibacterial textiles.

The invention relates to a heavy metal trapping agent in the field of environment protection. The heavy metal trapping agent is prepared from polymer containing a polyethylene diamine tetra-acetic acid unit, wherein by weight percentage, the content of the polyethylene diamine tetra-acetic acid unit is 45-100% of polymer; the polymer is homopolymer or copolymer; the polyethylene diamine tetra-acetic acid unit is a form of sodium salt, potassium salt or ammonium salt. The defect that a chelate compound of existing ethylenediamine tetra-acetic acid and the heavy metal is generally soluble is overcome, and the provided heavy metal trapping agent has strong heavy metal chelating power, and the solubility can be controlled by pH of the solution; moreover, the trapping agent is free of toxicity.

The invention provides a trace metal element chelation fertilizer in lignin and application thereof. The trace metal element chelation fertilizer in the lignin is a mixture of lignosulfonate and metal element chelates and shows the following physical-chemical characteristics of: 1, appearance: white powder; and 2, stability parameters of chelate: the average coordination number x is between 0.9 and 1.95 and the stability constant 1gK is between 0.6 and 2.10; and 3, the metallic chelation rate is 10 to 13.55 percent. The lignosulfonate-metal element chelation fertilizer is prepared by performing oxidative modification reaction on paper-making waste liquid lignosulfonate and metal elements such as iron, zinc and copper which serve as raw materials, and the chelation property of lignin ammonium is quantitatively described by measuring the stability of the chelates of lignin ammonium-Fe and lignin ammonium-Zn. The industrial lignin and the metal elements form the 'lignin-metal elements' chelates, and the obtained chelates are dried to form solid products or the obtained chelates after proper concentration can be mixed with other kinds of fertilizers to prepare various compound fertilizers.

The invention provides a cleaning agent for an automobile cooling system. The cleaning agent comprises, by weight, 3 to 20% of glycolic acid, 2 to 9% of citric acid, 2 to 10% of methanesulfonic acid, 1 to 10% of ammonium citrate, 0.5 to 7% of a corrosion inhibitor and 0.01 to 2% of a surfactant, with the balance being deionized water. The cleaning agent for the automobile cooling system in the invention can effectively remove calcium scale, magnesium scale and iron rust in the cooling system, is applicable to cleaning of a variety of materials like carbon steel, iron, copper and aluminum in a cooling system of an engine and has the advantages of high efficiency, mildness and a low corrosion rate. The cleaning agent is applicable to general repair and maintenance of an automobile and is used for removing dirt generated due to usage of water as a cooling medium so as to increase the efficiency of heat transfer between the engine and the cooling medium and enable operation of the engine to be smoother.

The invention provides a solar silicon wafer cleaning agent including 1 wt%-15 wt% of heterogeneous alcohol polyoxyethylene ether, 1 wt%-15 wt% of propanediol ether, 0.5 wt%-10 wt% of ethylene diamine tetraacetic acid tetrasodium salt, greater than zero and less than or equal to 10 wt% of an anionic surfactant, greater than zero and less than or equal to 20 wt% of a pH regulator, and the balance being water. The anionic surfactant and heterogeneous alcohol polyoxyethylene ether are adopted to compound, so that the cleaning agent has stronger cleaning ability; propanediol ether is selected as a solvent, and the kind of solvent is an organic solvent with low toxicity and no stimulation; meanwhile, ethylene diamine tetraacetic acid tetrasodium salt is also selected as a metal ion complexing agent, and copper, iron and other metal ions on the surface of a silicon wafer can be effectively removed; and finally, the pH regulator is selected to adjust the pH value of the cleaning agent, oil stains on the surface of the silicon wafer are effectively removed, and the cleaning effect is lasting and durable.

The invention discloses a novel acidic anti-staining soap lotion and a preparation method thereof. The novel acidic anti-staining soap lotion is prepared from aliphatic amine polyoxyethylene ether biquaternary ammonium salt, a maleic anhydride-acrylic acid-N-vinyl pyrrolidone terpolymer, a carboxyalkylthiosuccinic acid and water. The acidic anti-staining soap lotion has extremely strong dispersing and chelating abilities, and has the strong affinity to hydrolyzed reactive dyes and dissociative reactive dyes. When the acidic anti-staining soap lotion is applied to a soaping aftertreatment process of reactive dye dyeing cotton fabrics, the production procedures are reduced, the water consumption is lowered, the dyeing fastness of the fabrics is obviously improved and the good anti-staining effect is realized. Thus, under the same condition, the usage amount of the soap lotion is reduced, so that the damage to fibers is reduced. Therefore, the novel acidic anti-staining soap lotion has high performance-price ratio.

The invention relates to a graphene oxide and chitosan microsphere and a preparation method thereof. According to the technical scheme, chitosan is dissolved in a graphene oxide dispersing agent obtained through ultrasonic dispersion, and graphene oxide and chitosan mixed liquor is obtained; liquid paraffin and span-80 are sequentially added to the graphene oxide and chitosan mixed liquor, and stirring is conducted for 2-4 h; formaldehyde is added, and stirring is conducted continuously for 1-2 h; a NaOH solution and an absolute ethyl alcohol are added, stirring is conducted for 2-4 h, washing and filtering are conducted, and a graphene oxide and chitosan pre-crosslinked microsphere is obtained; on the condition that the temperature ranges from 65 DEG C to 70 DEG C, the graphene oxide and chitosan pre-crosslinked microsphere is added to an epoxy chloropropane solution, stirring is conducted for 3-5 h, washing, filtering and vacuum drying are conducted, and the graphene oxide and chitosan microsphere is obtained. According to the graphene oxide and chitosan microsphere and the preparation method thereof, the preparation technology is simple; the prepared product has the advantages of being large in particle size, good in mechanical property, prone to sedimentation, prone to be separated from water, high in chelating capacity to heavy metal ions and good in adsorption property to the heavy metal ions.

The invention provides a preparation method and application of a nitrogen-doped porous carbon-coated cobalt nanoparticle composite material. The preparation method comprises the following steps: uniformly dispersing a carbon source precursor, a nitrogen source precursor and soluble salt of transition metal ions in a solvent according to a ratio, then performing drying to obtain a solid powder precursor, and calcining the solid powder precursor in a protective atmosphere to obtain black powder, namely the composite material. The composite material has efficient oxygen reduction catalysis performances and can be applied to proton exchange membrane fuel cells, alkaline fuel cells and metal-air batteries. The catalyst has the advantages that a pore structure is generated in the heat treatmentprocess and is uniformly dispersed; the carbon source, the nitrogen source and the metal source interact with one another to stabilize active elements and effectively improve the catalytic activity. Compared with a catalyst with commercial carbon as a carbon source, the prepared composite material has better oxygen reduction catalytic activity and is an efficient non-noble metal oxygen reduction catalyst.

The invention discloses a biodegradable non-phosphorous anti-scale corrosion inhibitor and a preparation method thereof. The biodegradable non-phosphorous anti-scale corrosion inhibitor comprises, by mass, 10-20% of polyaspartic acid, 5-20% of polyepoxysuccinic acid, 30-60% of copolymers, 5-10% of zinc salt, 2-5% of fluorescent tracers and the balance water, wherein the molecular weight of the copolymers ranges from 2000-10000, and the copolymers are maleic anhydride / acrylic acid / acrylic acid oxylactone / 2-acrylamide-2-methylpro panesulfonic acid quaternary copolymers. The non-phosphorous anti-scale corrosion inhibitor is used for stainless steel condenser circulating cooling water systems of thermal power plants, is non-phosphorous, non-toxic, easily biodegradable, free from environmental problems and unlimited in discharge, and is capable of controlling carbon steel corrosion rate to be smaller than or equal to 0.075mm / a, controlling corrosion rate of copper, copper alloy and stainless steel to be smaller than or equal to 0.005mm / a, controlling dirt deposition rate to be smaller than or equal to 15mcm and controlling scale inhibition rate to be larger than or equal to 80%.

The invention relates to the technical field of photovoltaic module packaging adhesive films, in particular to a three-layer co-extrusion composite adhesive film for packaging a photovoltaic module and a preparation method thereof. The composite adhesive film comprises EVA layers, a POE anti-polarization layer and an EVA layer which are sequentially arranged from top to bottom, wherein EVA resin has a melt flow rate of 5 g / 10 min-30 g / 10 min, light transmittance of larger than 85%, volume resistivity of larger than or equal to 1.0 * 10<14>, melting temperature of 30-80 DEG C, and VA content of5-30%; POE resin has a melt flow rate of 3 g / 10 min-20 g / 10 min, light transmittance of greater than 86%, volume resistivity of greater than or equal to 1.0 * 10<15> and melting temperature of 30-80DEG C. The EVA layers are adopted on the two sides of the composite adhesive film, the compatibility of the EVA layers and polar auxiliaries is good, and the problems of bubbles, slippage and piece combining during assembly laminating can be solved.

The invention provides a preparation method of lignin metal chelate fertilizer, sequentially comprising the following steps of: (1) preparing industrial lignin salts into an aqueous solution of a certain concentration in a dissolving tank; (2) transferring the prepared aqueous solution of industrial lignin to a reaction vessel and regulating a pH value of the solution by using a pH regulator; (3) adding an oxidant and an initiator, starting a stirring device of the reaction vessel, sufficiently and uniformly mixing and then adding inorganic salts containing micro metal elements; and (4) heating to a certain temperature and reacting for specified time. The invention also provides a device for carrying out the method. The modified lignin salt-medium micro metal element chelate fertilizer which is prepared by using the method and the device has the advantages of low cost and strong chelating capability, and can be compounded with various fertilizers and improve the content of micro elements in the fertilizer.

The invention discloses a dyeing method using an accelerating, fixation and chelation dispersing aid of an active dye. The accelerating, fixation and chelation dispersing aid is sodium phytate; cottons and silk fabrics are dyed by a dip dyeing process; the dyeing process comprises the following steps of: dissolving the active dye and the sodium phytate into water to prepare a dyeing solution; feeding the fabric into the dyeing solution; heating at the heating speed of 0.5 to 2 DEG C per minute to the temperature of 60 to 100 DEG C, and preserving the heat for 30 to 100 minutes; and after the heat preservation is finished, washing, soaping, secondarily washing and drying the fabric. According to the dyeing method, the sodium phytate replaces a neutral electrolyte, a fixation alkaline agent and a chelation dispersing aid in the conventional process and serves as a multifunctional dyeing aid of the active dye; and the functions of the three aids can be realized only when the sodium phytate is added. According to the technical scheme, the process is simple and convenient to operate; special requirement on the active dye and equipment is avoided; the conventional dyeing equipment can be used for implementing large-scale production; and the dyeing method is wide in application prospect.

The invention discloses a modified alkali lignin chelated zinc fertilizer and a preparation method thereof. The preparation method comprises the following steps: adding alkali lignin powder into water, regulating the pH value, and dissolving to obtain a 30-40 wt% water solution; adding amino acid, dropwisely adding epoxy chloropropane, heating to 75-95 DEG C, and reacting for 2-3 hours; regulating the pH value to 10-12, dropwisely adding bromoacetic acid, and reacting at 70-90 DEG C for 1-2 hours; and finally, regulating the pH value of the system to 5-7 with a dilute hydrochloric acid solution, adding zinc sulfate, and carrying out chelation reaction at 50-70 DEG C for 0.5-2 hours, thereby obtaining the modified alkali lignin chelated zinc fertilizer after the reaction finishes. The chelated microelement fertilizer molecules have abundant hydroxy and carboxyl groups, and the N atom has lone electron pairs which can form composite coordination with metallic ions; and thus, the fertilizer has high chelation capacity, and the maximum complexation quantity for zinc ions is approximate to the level of EDTA (ethylene diamine tetraacetic acid); and the pot incubation test indicates that the fertilizer has an obvious yield increase action on crops.

This invention relates to a metal polishing solution, which is composed of: abrasive material 10-50 wt. %, surfactant 0.1-1 wt. %, pH regulator 1-5 wt. %, chelating agent 0.1-1 wt. %, and deionized water as balance. The granularity of the abrasive material is 15-100 nm. The pH value of the metal polishing solution is 8-12. The metal polishing solution is prepared by: filtering and purifying the above components of the metal polishing solution, introducing the components into a container through a mass flowmeter under negative pressure in a class 1000 clean room, and stirring uniformly. The metal polishing solution has such advantages as high polishing speed, high smoothness, small diameters, and little damage to wafer surface, wasy cleaning, no toxicity, no odor, no corrosion, simple process and easy operation.

The invention relates to a chelated powdery water-soluble leaf fertilizer containing a surfactant, which is applied in the field of agriculture and forestry. The leaf fertilizer consists of the following materials by weight percent: 25-45% of potassium sulfate, 15-55% of ammonium sulfate, 10-20% of monoammonium phosphate, 1-22% of calcium chloride, 0.1-0.7% of copper sulfate, 0.1-0.7% of zinc sulfate, 0.5-1% of borax, 0.1-1.0% 0f ferrous sulfate, 0.1-0.7% of manganese sulfate, 0.1-0.7% of ammonium molybdate, 1-12% of surfactant, 0.1-0.5% of EDTA (ethylene diamine tetraacetic acid), 0.1-3% of sodium citrate, 0.5-5% of sugar alcohol, 0.1-5% of monoethanol diamine and 0.1-1.0% of triethanolamine. The chelated powdery water-soluble leaf fertilizer is prepared by the steps of smashing, liquefying, chelating, drying and smashing the materials in a certain proportion, thus preparing the chelated powdery water-soluble fertilizer. By the reasonable proportioning of N, P and K materials and trace elements, the chelated powdery water-soluble fertilizer resistant to hard water and not prone to deliquescing and agglomeration is prepared; and the chelated powdery water-soluble leaf fertilizer has the characteristics of improving the comprehensive nutrition for the growth of crops, and being high in fertilizer efficiency, practical, wild in application and the like.

This invention discloses a fine polishing solution for silicon wafer. The fine polishing solution is composed of: composite abrasive material 5-30 wt. %, surfactant 0.1-1 wt. %, chelating agent 0.1-1 wt. %, pH regulator 1-6 wt. %, and deionized water as balance. The composite abrasive material is composed of water-soluble silica sol and Al2O3 hydrosol or CeO2 hydrosol at a weight ratio of 4:1. The composite abrasive material has particle sizes of 10-60 nm. The fine polishing solution has such advantages as small particle sizes of the composite abrasive material, no damage to wafer surface after polishing, high polishing speed, high fluidity, and no sodium ion contamination (by using organic alkali as the pH regulator). By utilizing nonionic surfactant, the composite abrasive material and the reaction product can be easily removed from wafer surface.

The invention relates to an oil well cement high temperature retarder applied to the technical field of oil field well drilling and completion. The invention is characterized in that: the retarder is composed of 1 part by weight of water, 0.005-0.030 part by weight of hydroxycarboxylic acid and salt thereof, 0.005-0.010 part by weight of cellulose derivative and 0.0001-0.0010 part by weight of sulfonate. The high temperature retarder has wide applicable temperature range, can be applied to cement paste systems with various densities, has strong compatibility with a plurality of admixture systems, and does not influence the performance of cement paste. The cement paste prepared by the retarder is stable, the thickening transition time is short, and the thickening time is adjustable; the hardened cement paste has rapidly developed compression strength and is suitable for the requirement of well cementation engineering.