472 results about "Hydroxyethylidene Diphosphonic Acid" patented technology

The invention belongs to the technical field of polymer material, and relates to a method, used in a production process, for reducing metal impurities in poly(aryl ether ketone). The method comprises the following steps: 1) purification: fully mixing poly(aryl ether ketone) with hydroxy ethidene diphosphonic acid aqueous solution with mass concentration of 0.1-2% at 40-100 DEG C for 0.5-3 h, wherein time for mixing and stirring is preferably 1-2 h, and filtering; 2) washing: washing the purified poly(aryl ether ketone) with distilled water, until conductivity of the aqueous solution is below 20 muS / cm; and 3) drying: drying the washed poly(aryl ether ketone) at 120-140 DEG C for 4-6 h to obtain poly(aryl ether ketone) with metal impurities removed. The method can not only reduce content of the metal impurities in the poly(aryl ether ketone) and improve product quality; besides the used reagents have excellent chemical stability, small dosage, and no self toxicity or pollution, can be treated with biochemical degradation in a later period of production, and will not harm the environment.

The invention provides a composite corrosion inhibition antisludging agent for ultralow rigidity circulation cooling water. The composite corrosion inhibition antisludging agent comprises the following raw materials in parts by weight: 5-15 parts of amino trimethylene phosphonic acid, 5-15 parts of hydroxyethylidene diphosphonic acid, 1-15 parts of diethylenetriamine pentamethylene phosphonic acid, 5-15 parts of hydrolytic polymaleic anhydride, 2-15 parts of terpolymer, 2-20 parts of heptahydrate, 0.1-2 parts of hydroxy benzotriazole and 3-79.9 parts of pure water. The hydroxy benzotriazole is added after the amino trimethylene phosphonic acid, the hydroxyethylidene diphosphonic acid, the diethylenetriamine pentamethylene phosphonic acid, the hydrolytic polymaleic anhydride and the terpolymer are stirred and mixed; and the composite corrosion inhibition antisludging agent is obtained by adding the water and the heptahydrate until the hydroxy benzotriazole is entirely dissolved. The hydrolytic polymaleic anhydride and the terpolymer used by the invention have a good diffusion effect, and can effectively prevent carbonates, phosphates and the like from being deposited and scaled. Meanwhile, the hydrolytic polymaleic anhydride and the terpolymer belong to a non-phosphate monomer, so that the agent phosphate content is reduced. Therefore, the composite corrosion inhibition antisludging agent is beneficial to environmental protection.

The invention provides a super slump type polycarboxylate water reducing agent for bored pile concrete. The water reducing agent is in a liquid state and comprises the following ingredients: sodium oleate, water reducing type polycarboxylate plasticizer, slump type polycarboxylate plasticizer, hydroxyethylidene diphosphonic acid, 2-acrylamide-2-methylpropanesulfonic acid / itaconic acid / acrylic acid terpolymer, hydroxypropyl methyl cellulose or hydroxyethyl methyl cellulose, air entraining agent and triisopropanolamine. The super slump type polycarboxylate water reducing agent for bored pile concrete provided by the invention has the following beneficial effects that by using the super slump type polycarboxylate water reducing agent, the bored pile concrete is good in homogeneity, the static bleeding rate of the bored pile concrete can be generally less than 1%, stable working performance can be maintained within a long time span, meeting the working property of concrete after 0.5-5.0h can be met by adjusting the formulation and dosage and improving the compressive strength ratio of the concrete, and the 28 d strength can be more than 130% of that of benchmark concrete. The invention further provides a preparation method of the super slump type polycarboxylate water reducing agent for bored pile concrete.

The invention relates to a salt tolerant corrosion and scale inhibitor for underground oil-gas wells and a preparation method thereof. The salt tolerant corrosion and scale inhibitor is composed of an oxazoline derivative, thiourea, cetyl pyridinium chloride, dodecyl dimethyl benzyl ammonium chloride, amino trimethylene phosphonic acid, hydroxyethylidene diphosphonic acid, hexamethylenetetramine, and methanol. The corrosion and scale inhibitor has very strong salt resistance, and under high salinity conditions (100000-200000mg / L), has a significant inhibiting effect on metal corrosion, and the corrosion inhibition rate can reach more than 80%. The organic phosphonic acid molecular structure of the reagent contain a double bond structure, the structure and the calcium ions and magnesium ions in water can chelate to form a stable complex to be adsorbed on seed crystal surface active sites, thereby inhibiting crystal normal growth. With significant scale inhibiting effect and a scale inhibiting rate up to 94%, the product is suitable for inhibiting corrosion and scaling phenomena of oil-gas well rods and pipes containing carbon dioxide, hydrogen sulfide and other complex media conditions under high salinity.

The invention belongs to the technical field of civil engineering material, and relates to a novel concrete super retarder and a preparation method thereof. A technical scheme of the present invention comprises that: the concrete super retarder adopts hydroxyethylidene diphosphonic acid (HEDP), amino trimethylene phosphonic acid (ATMP) and water as raw materials, wherein a mass ratio of the three raw materials is 6:1:13. The preparation method comprises sequential adding the HEDP, the ATMP and the water into a stirring vessel, followed by slow heating to a temperature of 35-45 DEG C and uniform stirring. With the present invention, production technology of the concrete super retarder is simple, comprehensive production cost of the concrete super retarder is low, and later strength of the concrete is not reduced but is improved. An addition proportion of the concrete super retarder in the concrete is 0.05%-0.5% of mass of cementitious materials, such that the concrete can have an initial setting time of 0-120 hours, and the later strength of the concrete is unaffected after completing retarding. The concrete super retarder is widely applicable for a plurality of fields such as concrete construction in summer and mass concrete construction. According to the present invention, generations of temperature cracks are effectively prevented, slump loss is decreased, and long distance transport of the concrete is easy to be performed.

The invention relates to a low-phosphorus compound corrosion and scale inhibitor and applications in the treatment of high-alkalinity and high-hardness circulating cooling water thereof. The efficient low-phosphorus corrosion and scale inhibitor is characterized by adding the following components according to the circulating water: 0.2-1.2mg / L of hydroxyethylidene diphosphonic acid, 0.125-1mg / L of 2-phosphonic acid-1,2,4-tricarboxylic acid, 0.14-1.2mg / L of sulphonate copolymer, 0.625-5mg / L of maleic acid-acrylic acid copolymer, 0-1.6mg / L of polyacrylic acid and 0-0.4mg / L of copper relief agent. The low-phosphorus compound corrosion and scale inhibitor can be used for the treatment of circulating cooling water, has the total phosphorus content less than or equal to 0.5mg / L in the circulating water, has the advantages of good comprehensive performance, excellent CaCO3 scale resistance function, corrosion inhibition performance and small dosage of less than or equal to 20mg / L under normal condition, is applicable to the treatment of circulating cooling water, and reduces the hazards of phosphorus emission on environment.

The invention provides a novel corrosion and scale inhibitor and a preparation method thereof. The novel corrosion and scale inhibitor comprises a corrosion inhibitor, a scale inhibitor and etidronic acid with the mass ratio of (0.1-1):(1-90):(0.1-10), wherein the corrosion inhibitor is a compounded corrosion inhibitor and comprises the following raw materials: oleic acid, diethylenetriamine, a quaternary ammonium reagent, and a compound; the compounded corrosion inhibitor is prepared by the following steps: obtaining imidazoline intermediates through the reaction between the oleic acid and diethylenetriamine; reacting with the quaternary ammonium reagent and obtaining an imidazoline quaternary ammonium salt corrosion inhibitor; finally, adding the compound and compounding to obtain the compounded corrosion inhibitor. The invention further provides the preparation method of the corrosion and scale inhibitor. The novel corrosion and scale inhibitor provided by the invention has the function of inhibiting corrosion and scale simultaneously and can effectively solve the problem of oilfield water scaling in the field of oil fields.

The invention discloses a reverse osmosis membrane used corrosion and scale inhibitor as well as the preparation method thereof, and belongs to the liquid separation technology field. The invention is used for improving the inhibition effectiveness of the scale inhibitor and reducing the cost. The invention has the technical proposal that the corrosion and scale inhibitor is composed of a basic constituent and additives, the basic constituent is prepared from materials by the weight units as follows: hydroxyethylidene diphosphonic acid of 4 to 5, sodium polyacrylate of 5 to 6, hydrolyzed polymaleic anhydride of 5 to 6, and polyepoxysulfosuccinic acid of 3 to 4. The invention is a non-phosphate, non-nitrogenous and green environmental protection upscale multi-element scale and corrosion inhibitor, which has excellent scale inhibition and dispersion performance aiming at calcium carbonate, calcium sulfate, barium sulfate, calcium fluoride and silica scale in water, the scale inhibition effect exceeds the common organic phosphine scale inhibitor, and the scale inhibition rate reaches 85 percent. The components of the invention have very good synergistic effect, the product performance is stable, the cost is low, and the price is one third lower than that of the similar product in the current market.

The invention provides a reverse osmosis compound scale inhibitor and belongs to the field of reverse osmosis water treatment. The scale inhibitor comprises the following components in percentage by weight: 10 to 20 percent of 1-hydroxyethylidene-1,1-diphosphonic acid, 30 to 40 percent of hydrolytic polymaleic anhydride, 30 to 40 percent of polyacrylic acid and 10 to 20 percent of sulfonated styrene-maleic anhydride copolymer, and the scale inhibitor comprises also comprises a bactericide. The reverse osmosis compound scale inhibitor fully utilizes the synergistic effect among organic phosphorous scale inhibitors, polycarboxylic acid scale inhibitors and sulfonic acid scale inhibitors, has good scale inhibition and dispersion performance; and when used in a reverse osmosis water inflow system, the scale inhibitor can effectively lighten pollution of calcium carbonate, calcium sulfate and silicate to reverse osmosis membranes and prolongs the cleaning period and service life of the reverse osmosis system.

Embodiments described herein provide methods for forming indium-gallium-zinc oxide (IGZO) devices. A substrate is provided. An IGZO layer is formed above the substrate. A copper-containing layer is formed above the IGZO layer. A wet etch process is performed on the copper-containing layer to form a source region and a drain region above the IGZO layer. The performing of the wet etch process on the copper-containing layer includes exposing the copper-containing layer to an etching solution including a peroxide compound and one of citric acid, formic acid, malonic acid, lactic acid, etidronic acid, phosphonic acid, or a combination thereof.

The invention relates to a drip washing method for remedying cadmium-contaminated soil. The drip washing method comprises the following steps: taking hydroxy ethylidene diphosphonic acid (HEDP) with the concentration of 0.5-11% as a drip washing agent, and adding the drip washing agent into the cadmium-contaminated soil; collecting eluate, so that the washing process is completed. Experiments show that the drip washing agent has a relatively good effect on removing cadmium in the soil. The drip washing method has the advantages of high remedying efficiency, strong operability, low environmental risk and the like.

The invention discloses an etidronic acid with the content of arsenic less than or equal to 3ppm and a process for preparing the same. The method is to use phosphorus trichloride, acetic acid and ammonium thioacetamide as raw materials and comprises the following steps of: putting one-third of the acetic acid and the ammonium thioacetamide into a reaction kettle, stirring to control the temperature and the pressure, slowly dropping one-third of the phosphorus trichloride and putting one-third of the ammonium thioacetamide into the reaction kettle, stopping stirring and keeping stand; controlling the temperature and the pressure; dropping the remaining phosphorus trichloride into the reaction kettle; then stirring for 1 hour with the rotational speed of 50 to 60 revolutions per minute, raising the temperature slowly and reflowing; controlling the temperature and the pressure while reflowing; hydrolyzing the esters produced after reflowing under the negative pressure; concentrating the materials, filling air, removing impurities, reducing the temperature, putting the remaining phosphorus trichloride into the reaction kettle, sealing the reaction kettle and keeping stand, and then putting the materials into a mixing tank; regulating and filtering the materials so as to obtain an HEDP product. The product has extremely little arsenic with less than or equal to 3ppm, which not only reduces the environmental pollution, but also expands the application fields.

The invention discloses a nitrogen and phosphor co-doped hollow carbon sphere material with a shell layer having a grading macropore-mesoporous structure as well as a preparation method and application thereof. An in situ doping method is adopted, a silicon dioxide nano-ball is taken as a hard template, a melamino-formaldehyde resin is taken as a carbon precursor and a nitrogen source, an etidronic acid is taken as a catalyst and a phosphorus source and the nitrogen, and lastly, the phosphor co-doped hollow carbon sphere material with the shell layer having the grading macropore-mesoporous structure is compounded. The prepared hollow carbon sphere material has the advantages of high nitrogen and phosphor atom doping content, controllable shape, excellent electrochemical property, and the like, and meanwhile, the preparation raw material is low in cost, the cost is low, the preparation method is simple and the nitrogen and phosphor co-doped hollow carbon sphere material is suitable for large-scale industrial production.

The invention relates to a water reducing agent for super slump retaining concrete, which is prepared from the following raw materials: 20-35% of polycarboxylic acid water reducing agent, 6-14% of polycarboxylic acid slump retaining agent C series, 1-4% of a retarder, 0.05-1% of a water retaining agent, 0.05-0.25% of an air entraining agent, 0-0.1% of a defoaming agent and the balance of water, wherein the sum of the mass percentages of the components is 100%. The polycarboxylic acid slump retaining agent C series is one or a combination of more than one of a polycarboxylic acid slump retaining agent C1, a polycarboxylic acid slump retaining agent C2 and a polycarboxylic acid slump retaining agent C3; the retarder is one or a combination of more than one of sodium gluconate, white granulated sugar, sodium tripolyphosphate, sodium hexametaphosphate, citric acid, oxalic acid, hydroxyethylidene diphosphonic acid, sodium citrate, tannic acid and zinc sulfate. The invention further providesa preparation method of the polycarboxylic acid slump retaining agents C1, C2 and C3. The water reducing agent can achieve long-term slump protection of the concrete, and solves the problems that theconcrete needs long-term slump protection in the concrete, but the concrete returns for a short time to seperate water, the setting time is not up to the standard, and the like.

The invention discloses a rejection processing technology for gas production wastewater in sulfur acid containing gas field. The rejection processing technology for gas production wastewater in sulfur acid containing gas field comprises the following steps: enabling the sulfur acid containing gas field gas production wastewater to be successively subjected to suspension and oil removal processing, aeration sulfur removal, chemical oxidation sulfur removal, coagulation and flocculation processing, settlement, sterilization, double-medium filter filtering, fiber bundle filter filtering, ultrafiltration, and corrosion and scale inhibition. The invention also provides a corrosion and scale inhibition agent which comprises hydroxyethylidene diphosphonic acid, sodium sulfonate and benzotriazole. The gas production wastewater rejection processing technology is simple in flow, relatively low in operation cost and simple in management, and is capable of effectively processing sulfur acid containing gas field gas production wastewater, and discharged water reaches A3 standard in Recommended Index for the Injection Water Quality for Clastic Reservoir in People's Republic of China petroleum and Natural Gas Industry Standards SY / T5329 / 94.

The invention discloses concrete retarder. The concrete retarder comprises, by weight, 2-4 parts of sodium borate, 3-7 parts of monopotassium phosphate, 4-8 parts of calcium sulfate, 6-8 parts of etidronic acid, 3-5 parts of ethylene diamine tetraacetic acid, 1-4 parts of sorbitol, 25-30 parts of bentonite, 10-15 parts of vermiculite powder, 4-6 parts of a water reducing agent, 1-3 parts of a dispersing agent and 0.4-0,8 part of a surface active agent. The concrete retarder has the advantages of good retarding effect, high strength, free of pollution and the like, and is a concrete additive which is quite promising.

The invention provides a special corrosion and scale inhibitor for a boiler. The special corrosion and scale inhibitor is composed of hydroxyethylidene diphosphonic acid, ethylene diamine tetra (methylene phosphonic acid) sodium, diethylene triamine pentamethylene phosphonic acid, hydrolytic polymaleic anhydride, acrylic acid-hydroxypropyl acrylate copolymer and deionized water. The special corrosion and scale inhibitor has higher dispersion capability and higher calcium tolerance and still can effectively control scale formation under conditions of high hardness, high alkali, high iron, high pH and high temperature. The special corrosion and scale inhibitor can be matched with other traditional scale inhibition and dispersion agents for use, simultaneously has very higher corrosion inhibition capability and is a more ideal corrosion and scale inhibition dispersion agent for water treatment of the boiler.

The invention discloses a cleaning agent for flue dust scale on the surface of a gas heat exchanger of a gas desulfurization system and a preparation method thereof. The cleaning agent is characterized by comprising the following components in percentage by mass: 5 to 25 percent of main cleaning agent, 3 to 15 percent of auxiliary cleaning agent, 2 to 10 percent of release agent, 2 to 8 percent of corrosion inhibitor, and the balance water, wherein the main cleaning agent is one or two of nitric acid, hydrochloric acid and sulfuric acid; the auxiliary cleaning agent is more than one of methanoic acid, acetic acid, ethylene diamine tetraacetic acid, sulfamic acid, glycollic acid, oxalic acid and hydroxyethylidene diphosphonic acid; the release agent is one of dodecyl dimethyl benzyl ammonium bromide, dodecyl dimethyl benzyl ammonium chloride and distearyl dimethyl ammonium chloride; and the corrosion inhibitor is pickling inhibitor. The cleaning agent can realize online cleaning at normal temperature, complete scale removal, short cleaning time, lower cleaning cost and no corrosion to enamel on the surface of a heat exchange element.

The invention relates to a chemical cleaning agent, in particular relating to a special cleaning agent for cleaning aluminium equipment. The invention provides the special leaning agent for the aluminium equipment and a scheme. The cleaning agent can effectively clean various insoluble scales on the aluminium equipment. The cleaning agent comprises the following raw materials by weight percent: 15-25% of HNO3, 3-10% of hydroxyethylidene diphosphonic acid, 1-2% of HF, 0.5-1.5% of JFC, 0.03-0.1% of nonionic polyacrylamide, 0.1-0.5% of corrosion inhibitor L-5 and the balance of water. The agent is mainly composed of organic aicd, a corrosion inhibitor, a cosolvent, a penetrating agent and other mixtures and is specially used for cleaning the aluminium equipment, the pH value of the agent is acidic and metals is not corroded, and a passivation coating is formed on the surface of metal aluminium at the time of cleaning so that cleaning and passivation can be completed by one step.

The invention discloses a beneficiation method for silicate and carbonate type fluorite ores, and belongs to the technical field of non-metal ore beneficiation. The problems of low recovery rate and high impurity content of concentrate products in the conventional beneficiation method are solved. The method comprises the following steps of ore grinding; roughing, that is, a gangue inhibitor is a combination of T20 and acidic soluble glass, the collecting agent is Y-8, the gangue inhibitor T20 comprises polyaspartic acid, aluminum sulfate and hydroxyethylidene-1,1-diphosphonic acid in a mass ratio of 3-6: 4: 0.5-1, and the collecting agent Y-8 comprises sodium oleate, 4-epoxytetradecanoic acid and octylphenylpolyethylene glycol in the mass ratio is 6-7: 2-3: 1; scavenging operation, that is, a collecting agent Y-8 is added; regrinding rough concentrate; concentration, that is, an inhibitor T20 and acidic soluble glass are adopted, and Y-8 is adopted as the collecting agent. Under the condition of low temperature, the impurity content in the concentrate product can be effectively reduced, and the fluorite concentrate grade is improved.

The invention provides an efficient and environment-friendly oil-removing, rust-removing and descaling agent and a preparation method thereof. The efficient and environment-friendly oil-removing, rust-removing and descaling agent is composed of following raw materials: 1-15% of hydroxyethylidene diphosphonic acid, 5-18% of citric acid, 8-25% of phosphoric acid, 4-18% of oxalic acid and 10-30% of nano oil-removing emulsifier. With the adoption of the efficient and environment-friendly oil-removing, rust-removing and descaling agent, various oil dirt, wax, oxides, oxide skins, welding spots, rust and the like can be completely cleaned; the treatment time is short and is rapider and more convenient; the efficient and environment-friendly oil-removing, rust-removing and descaling agent does not contain strong acids, strong alkalis and organic solvents and has low environmental pollution; the efficient and environment-friendly oil-removing, rust-removing and descaling agent has no stimulation and no damages on a human body and is safer and more reliable to use.

The invention discloses a making method of electron-grade solid hydroxy trimethylphosphine, which comprises the following steps: (1) cleaning autoclave, condenser and relative equipment clearly; (2) weighing liquid hydroxy trimethylphosphine into autoclave; stirring; (3) dehydrating in the vacuum under 35-120 deg.c; (4) cooling to 40-90 deg.c naturally; adding seed with quantity at 50-50000ppm; (5) cooling to indoor temperature; stewing; aging 4-20h; (7) centrifuging at high-speed centrifuger to dehydrate with velocity at 500-5000r / min; (8) packing the solid HEDP with activity over 95% and arsenic content less than 7ppm.

A corrosion inhibitor for use with Urea Ammonium Nitrate solutions is disclosed, comprising a blend of molybdate and one or more of the inorganic phosphates (including phosphates, polyphosphates, and pyrophosphates) and organic phosphates or phosphonates. Inorganic phosphates include, but are not limited to, SHMP (Sodium Hexametaphosphate) and TKPP (Tetra-Potassium Pyrophosphate). There are numerous other inorganic phosphates that will also serve as suitable secondary inhibitors. Organic phosphates or phosphonates include, but are not limited to, HEDP (1-Hydroxyethylidine-1,1-diphosphonic acid; also known as ethanol diphosphonate, acetodiphosphonic acid, or etidronic acid), ATMP or AMP (aminotri(methylenephosphonic acid)), PBTC (Phosphonobutane tricarboxylic acid), DETPMP (Diethylenetriaminepenta(methylene phosphonic acid)), and HPA (hydroxyphosphono acetic acid). There are numerous other organic phosphates and phosphonates that will also serve as suitable secondary inhibitors. The amount of molybdate can range from 1 ppm to 500 ppm by weight of fertilizer solution, with the preferred range from 10 ppm to 200 ppm. Amounts of inorganic or organic phosphate can also range from levels as low as 1 ppm up to 500 ppm, with the preferred range being from 5 ppm to 50 ppm.

The invention relates to a chemically-bonded HEDP (1-hydroxy ethylidene-1, 1-diphosphonic acid) medium-temperature organic polysiloxane phosphate based proton exchange membrane. The membrane is prepared by the following steps: firstly, under protection of nitrogen, mixing dimethyl sulfoxide and HEDP, stirring to obtain clear and transparent mixture, and performing reflux reaction at 160 DEG C; removing the dimethyl sulfoxide after the solution is cooled to 110 DEG C to obtain 1,1-vinyl diphosphonic acid liquid; secondly, mixing 1, 1-vinyl diphosphonic acid, 3-(methacryloxy) propyl trimethoxyl silane, 2, 2'-azobisisobutyronitrile and ethanol, stirring at 60-80 DEG C to react, cooling to room temperature, adding diluted hydrochloric acid, and stirring to obtain clear and transparent sol; thirdly, performing gelation to the sol to obtain a gel membrane; and fourthly, drying the gel membrane to obtain the chemically-bonded HEDP medium-temperature organic polysiloxane phosphate based proton exchange membrane. The membrane has high proton conductivity under medium temperature and low humidity and has excellent flexibility and mechanical property.

The invention relates to an acidic lasting wall built-up type toilet bowl cleaner and a preparation method thereof. Ordinary toilet bowl cleaners are large in use amount, poor in decontamination effect, and poor in corrosion inhibition, and may cause corrosion to sewer lines. The preparation method includes adding water, pigment and an acrylic polymer, stirring and adding acid to completely dissolve, adding fatty amine polyethenoxy ether under agitation until dissolving, continuously stirring and adding fatty alcohol-polyoxyethylene ether, inorganic salts, 1-Hydroxyethylidene-1,1-diphosphonic and essence, and ageing semi-finished products to give the desired products. The cleaner ensures good thixotropic properties on a perpendicular surface, also has good corrosion inhibition and anti-dirt redeposition properties, has a strong inhibitory effect on escherichia coli and staphylococcus aureus, has fragrant and deodorant performances, and achieves the application purpose of multi-effect in one.

The invention discloses a pretreatment method for iron-based hardware electroplating. The method is characterized by comprising the steps of: firstly using an alkaline solution and an acidic solution to clean iron-based hardware; then subjecting the hardware to electrochemical polishing treatment, with an employed chemical polishing solution containing 140-160mL / L hydrogen peroxide, 120-160mL / L acetic acid, 60-80mL / L concentrated nitric acid, 30-50g / L aminosulfonic acid, 10-20mL / L hydroxyethylidene diphosphonic acid and 6-10g / L sodium dodecyl sulfate; adopting a lead electrode as a cathode and the hardware as an anode to perform electrochemical treatment for 20-40min, and keeping the electric current density at 5-8A / dm<2>. The pretreatment method for iron-based hardware electroplating provided by the invention can make the hardware acquire a plating layer with excellent bonding properties in the follow-up electroplating process, and the plating layer is uniform and beautiful, and has high anti-corrosion performance.

The invention discloses a high concentration high stability one-element peracetic acid disinfectant and a preparation method thereof, and the high concentration high stability one-element peracetic acid disinfectant consists of the following raw materials by weight: 71%-73% of acetic acid, 1%-3% of hydroxyethylidene diphosphonic acid, 17%-20% of hydrogen peroxide, 1%-3% of sodium glucoheptonate, and balance of water. The preparation method is as follows: adding the acetic acid and the hydroxy ethylidene diphosphonic acid into a reaction kettle, stirring for 5-15min at normal temperature and under normal pressure, slowly adding the sodium glucoheptonate at the temperature no higher than 30 DEG C, stirring until the solution is clear and transparent, standing for 7-10min, adding the hydrogen peroxide, stirring for 10min at normal temperature and under normal pressure to prepare a final solution, curing for 7-10 days at 27-30 DEG C under airtight condition to obtain the one-element peracetic acid disinfectant. The one-element peracetic acid disinfectant is prepared by using hydroxyethylidene diphosphonic acid and sodium glucoheptonate composite stabilizer, by adjusting the formula, peracetic acid concentration is high, stability is good, shelf life is long, recycling cycle is long, hydrogen peroxide content is low, and the problem of secondary emission pollution caused by recycling use can be avoided.

A corrosion inhibitor for use with Urea Ammonium Nitrate solutions is disclosed, comprising a blend of molybdate and one or more of the inorganic phosphates (including phosphates, polyphosphates, and pyrophosphates) and organic phosphates or phosphonates. Inorganic phosphates include, but are not limited to, SHMP (Sodium Hexametaphosphate) and TKPP (Tetra-Potassium Pyrophosphate). Phosphoric acid may also be utilized to provide phosphate ions, by itself or in combination with other phosphorous containing compounds as a secondary inhibitor. There are numerous other inorganic phosphates that will also serve as suitable secondary inhibitors. Organic phosphates or phosphonates include, but are not limited to, HEDP (1-Hydroxyethylidine-1,1-diphosphonic acid; also known as ethanol diphosphonate, acetodiphosphonic acid, or etidronic acid), ATMP (aminotri(methylenephosphonic acid)), PBTC (Phosphonobutane tricarboxylic acid), DETPMP (Diethylenetriaminepenta(methylene phosphonic acid)), and HPA (hydroxyphosphono acetic acid). There are numerous other organic phosphates and phosphonates that will also serve as suitable secondary inhibitors. The amount of molybdate can range from 1 ppm to 500 ppm by weight of fertilizer solution, with the preferred range from 10 ppm to 200 ppm. Amounts of inorganic or organic phosphate can also range from levels as low as 1 ppm up to 500 ppm, with the preferred range being from 5 ppm to 50 ppm.

The invention discloses a treatment method of complexing heavy metal wastewater. The treatment method comprises the following steps: adjusting the pH value of the wastewater to be less than 7, adding Ca(O2)2 into the wastewater, stirring for oxidation displacement reaction with complexing heavy metal, adding Ca(OH)2 for adjusting the pH value of a water body to be more than 7, and carrying out stirring, standing, filtering and settling. Compared with conventional methods of reverse osmosis, ion exchange, a heavy metal capturing agent and the like, the treatment method is relatively economic, cost-saving, energy-saving and wide in application range, and has a good displacement effect on complex compounds formed by heavy metal such as copper, arsenic, nickel, lead and zinc, EDTA (ethylene diamine tetraacetic acid), HEDP (hydroxyethylidene diphosphonic acid), NTA (nitrilotriacetic acid), tartaric acid and the like; the high-stability complexing heavy metal wastewater can be treated, and the heavy metal removal rate can be increased by more than 25% under equal addition amount in comparison with calcium peroxide.

The invention relates to a high-hardness water-quality scale inhibition agent comprising organophosphate and a polymeric chemical substance, wherein the organophosphate is prepared by mixing the following components in percentage by weight: 10 percent of hydroxyethylidene diphosphonic acid, 10 percent of polyacrylic acid, 40 percent of citric acid and 40 percent of pure water. On the basis that the traditional scale inhibition and dispersion agent has chelating performance and complexation performance and by the configuration of new materials, the high-hardness water-quality scale inhibition agent increases a function of a PH-regulating scale inhibition method, has lower cost, scale inhibition and good cleaning effect at the same time, especially has better scale inhibition effect for high-hardness water and can not cause secondary pollution to a film system.