599 results about "Metal ion sequestering" patented technology

The invention relates to a compound chemical blocking removing agent of an oil field polymer injection well. The compound chemical blocking removing agent is characterized in that a high molecular extending agent with strong electronegativity is used for hydrating and extending condensed and agglomerated polymer macromolecule chains again; peroxide is used as a primary oxidation agent; polybasic carboxylic acid which can slowly and uniformly ionize hydrogen ions is used as controlled-release acid; auxiliary agents such as a corrosion inhibitor, a penetrant, a metal ion chelating agent, a dual-metal coupling agent, an iron ion stabilizer, a bacteriacide, a stratum protective agent, and the like are added at the same time; and macromolecular polymers in blocking substances, which are near the oil field polymer injection well, and are fully extended by the extending agent, are oxidized and degraded by active hydroxyl which is produced from the reaction of the primary oxidation agent and the controlled-release acid, so that blocking of the polymer injection well is removed, and the apparent water injectivity index is improved. The chemical blocking removing agent is non-toxic and environment-friendly, has a wide applicable range of temperature and water quality, and has the advantages of simplicity in construction technique, safety and convenience in use and storage, and the like; and the viscosity-reducing rate of the compound chemical blocking removing agent to polyacrylamide gel can reach above 99%.

Wet-chemical methods involving the use of water-soluble hydrolytically stable metal-ion chelate precursors and the use of a nonmetal-ion-containing strong base can be used in a coprecipitation procedure for the preparation of ceramic powders. Examples of the precipitants used include tetraalkylammonium hydroxides. A composition-modified barium titanate is one of the ceramic powders that can be produced. Certain metal-ion chelates can be prepared from 2-hydroxypropanoic acid and ammonium hydroxide.

An antiproliferative, antiinflammatory, antiinfective, immunization agent of a metal ion chelating agent such as picolinic acid, analogs or derivatives thereof, and methods of using the same. The agents chelate metals in metal containing protein complexes and enzymes required for growth, replication or inflammatory response. The preparations can be administered systemically or topically. The products can be used to reduce systemic levels of metals in disease states such as Wilson's disease, iron or lead toxicity. The preparations have antineoplastic, antiviral, antiinflammatory, analgesic antiangiogenic and antiproliferative effects and are used in the treatment of warts, psoriasis, acne, cancers, sunburn, inflammatory responses, untoward angiogenesis and other diseases and in the prevention of sexually transmitted diseases such as genital warts, herpes and AIDS.

The invention relates to an ink-jetting ink, in particular to a sublimation ink-jetting ink used for an industrial nozzle and a manufacturing method thereof. The sublimation ink-jetting ink comprises, by weight, 1-6% of disperse dyes, 10-14% of wetting agents, 5-20% of viscosity adjusting agents, 0.1-2% of bactericides, 0.01-1% of pH buffering agent, 1-10% of liquid resin, 0.1-40% of disperse agents, 0.01-5% of antifoaming agents, 0.1-5% of surface active agents, 0.01-2% of metal ion chelating agents and 10-80% of purified water. The manufacturing method of the sublimation ink-jetting ink used for the industrial nozzle includes color paste manufacturing and finished product manufacturing. The sublimation ink-jetting ink used for the industrial nozzle is simple in manufacturing method, smooth in ink jetting, free of blocking the nozzle, good in dispersion stability, free of going bad or denaturing even if being stored for a long time and low in cost, and diameters of dispersed ink points are even.

The invention discloses a formaldehyde-free fixing agent, which comprises the following components in parts by weight: 80 to 120 parts of cationic monomer, 5 to 20 parts of unsaturated high-grade organic amine monomer, 3 to 10 parts of dicyandiamide, 4 to 18 parts of pH regulator, 0.001 to 0.05 part of metal ion chelating agent, 0.5 to 1 part of initiator, 2 to 10 parts of epichlorohydrin and 20 to 50 parts of deionized water. The formaldehyde-free fixing agent provided by the invention does not contain formaldehyde and alkylphenol ethoxylates (APEO); and meanwhile, the film-forming property of the fixing agent is utilized, a meshed film layer can be formed on the surface of the fiber, so that the dye dissolution is reduced, the color fastness of reactive dye dyed fabrics is improved, a fixing effect is good, the formaldehyde-free fixing agent can be applied to fixing colors of the reactive dye dyed fabrics, and the washable color fastness and boiling water soaking fastness of the fabrics are improved.

Methods and compositions are provided for the treatment of inflammation and disorders, diseases, and adverse conditions, i.e., pathologies, caused by or otherwise associated with inflammatory processes. A metal ion sequestering agent that directly or indirectly exerts an anti-inflammatory effect is administered to a subject in combination with a sequestration inactivating moiety that facilitates transport of the metal ion sequestering agent through biological membranes. The sequestration inactivating moiety also inactivates the metal ion sequestering agent until association between the two components is cleaved in vivo to release the active sequestering agent. Compositions containing a metal ion sequestering agent and a sequestration inactivating moiety are also provided; the compositions optionally contain an added anti-inflammatory agent.

Chronic wounds may be treated by debriding necrotic and other devitalized tissue from the wound, and applying to the wound an extracellular polymeric substance solvating system comprising a metal ion sequestering agent, surfactant and buffering agent. The solvating system disrupts biofilms which may be present in the wound and aids or enables the resumption of normal healing.

The invention provides a solvating system for the removal of biofilms which solvates the extracellular polysaccharide matrix holding it to a surface. The aqueous solvating system comprises water, a metal ion sequestering agent, and a solvating agent for an extracellular polysaccharide matrix, which is gentle enough to be used directly on human tissues, but which may also be used on hard or soft non-tissue surfaces to breakdown, and / or remove biofilms.

The invention discloses a broad-spectrum and efficient cleaning agent for a cooling system, comprising the following components in percentage by weight: 1-5% of organic acid, 0.5-3% of metallic ion chelating agent, 0.5-2% of cleansing promotion agent, 0.1-1% of corrosion and scale inhibition dispersing agent, 0.3-5% of degreasing agent and the balance of water. The cleaning agent of the invention has safe use, the cleaning time is 1-2h, and the descaling rate is more than 90%, thereby greatly reducing corrosion and damage on the cooling system.

Chronic otitis media and other bacterial ear conditions may be treated by applying a solvating system containing a metal ion sequestering agent and surfactant to a bacterial biofilm in the middle or inner ear. The solvating system disrupts the biofilm and aids in its removal.

Methods of determining whether a sample includes one or more analytes, particularly proteinaceous analytes, of interest are provided. In the subject methods, an array of binding agents, where each binding agent includes an epitope binding domain of an antibody, is contacted with the sample. In many embodiments, contact occurs in the presence of a metal ion chelating polysaccharide, e.g., a pectin. Following contact, the presence of binding complexes on the array surface are detected and the resultant data is employed to determine whether the sample includes the one or more analytes of interest. Also provided are kits, systems and other compositions of matter for practicing the subject methods. The subject methods and compositions find use in a variety of applications, including proteomic applications such as protein expression analysis, e.g., differential protein expression profiling.

A flexible support layer having a first side and a second side, a flexible antimicrobial and metal-ion sequestering layer adjacent the first side of the support layer, a flexible polymeric layer adjacent said flexible support layer or said flexible antimicrobial layer having an immobilized metal-ion sequestering agent and a flexible adhesive layer adjacent the second side of the support layer.

The invention discloses a chemical mechanical pulping method which uses cotton stalk as material, wherein the invention processes the first grinding after the first screw protrusion pre-immersion to replace present APMP technique which comprises two screw protrusion immersion followed with at least two sections of grinding, then holds the pulp after first grinding process for some time to process chemical reaction, at the same time, the invention uses novel additive to replace traditional metal ion chelating agent, Na2SiO3 and MgSO4. Compared with present APMP technique, the invention has low cost and high strength to be used to produce high-level paper.

The invention discloses an environment-friendly scouring agent with high efficiency, which essentially comprises fatty amide, polyethenoxy ether, succinic acid, monoester sulfonate, C12 to 14 alkyl polysaccharide glycoside, isomery C13 hydrin polyethenoxy ether sodium dicarboxylic acid, secondary alkane sulfonate, chelating dispersant KX130 and water. The environment-friendly scouring agent with high efficiency that the invention provides has the advantages that: (1) the scouring agent is environment-friendly because the selected raw and supplementary materials are environment-friendly products and are degraded biologically into innoxious substance after entering into natural environment; (2) the scouring agent has good compatibility and high stability after compositing; (3) the scouring agent has strong resistance to alkali, the alkali resistivity is more than or equal to 240 g / L NaOH; (4) the scouring agent has strong penetrability, the sailcloth of 20 DEG C subsides less than or equal to 8S and has good emulsifying ability and detergent washing ability; (5) the scouring agent has good stability for hydrogen peroxide and the resolution ratio of the hydrogen peroxide is less than 10 percent; (6) the scouring agent has strong chelating power for metal ion and has good chelation on Cu2+, Fe3+ in bleaching liquor and improves the stability of the hydrogen peroxide, etc.

The invention relates to an etching solution for a copper-molybdenum alloy film. The pH value of the etching solution is 1-2. The etching solution comprises, by mass, 1%-5% of hydrogen peroxide, 0.1%-10% of inorganic acid, 0.5%-10% of sulfate, 0.5%-15% of inorganic ammonia salt buffering agents, 0.01%-10% of alcohol amine pH modifiers, 0.1%-10% of hydrogen peroxide stabilizers, 0.1%-5% of metal ion chelating agents, 0.01%-5% of metal inhibiters, and the balance deionized water. According to the etching solution for the copper-molybdenum alloy film, a small quantity of hydrogen peroxide is added and assisted with the metal inhibiters and inorganic acid, and the substances such as the sulfate and the inorganic ammonia salt buffering agents are added, so that the change of the pH value of an etching solution system is kept within +0.3 all the time in the etching process; the stability of the pH value of the etching solution system in the etching process can be kept, and nonuniform etching caused by an excessively-low pH value can be avoided; and in the process that the content of copper ions changes from 0 ppm to 1000 ppm, the etching speed is not changed, the etching CD and the slope angle are basically unchanged, etching residues are avoided, and the requirement of customers for high-precision machining is met.

The invention discloses a method for preparing an antibacterial porous oxidized graphene / chitosan composite bracket. The method comprises the steps of taking carboxylated graphene oxide as an antibiotic carrier; carrying out electrostatic interaction by carboxyl on the surface of the oxidized graphene and amino on the antibiotic, so as to absorb the antibiotic on the oxidized graphene; taking the chitosan as the carrier of antibacterial metal ions, chelating the metal ions in chitosan molecules, restoring the metal ions into metallic single substances through a reducing agent; and finally mixing the carboxyl graphene with the antibiotic and the chitosan solution loaded with antibacterial metal, freezing and drying to obtain the composite bracket with two different antibacterial materials. The composite bracket can release antibiotic within a short period of time and release the antibacterial metal ions for a long period of time, and has short-term antibacterial and long-term antibacterial effects, and good antibacterial effect.

The invention relates to a method for preparing high purity silica white by using rice husk ash as a raw material, belonging to the field of fine inorganic chemical technology. The invention is characterized by comprising the following steps: taking the rice husk ash and water for washing under constant stirring, separation, pickling, leaching, and then undertaking washing till the lavage liquid is neutral and drying; taking the dried rice husk ash for being mixed and reacted with the sodium hydroxide solution, through leaching and washing; collecting filtrate and washing liquid so as to be condensed and obtain water glass; diluting the water glass which is obtained from the condensation and adding metal ion chelating agent, and next carrying out precipitation reaction after being fully dissolved, then a sediment is obtained by centrifugal separation; using ultrasound-assisted washing treatment, and then undertaking centrifugal separation and repeated washing; placing the washed sediment into a drying oven and then crushing and packaging the sediment so as to obtain the silica white product. The invention has simple process flow, easy operation, can improve the purity of the silica white, and is suitable for commercial process; moreover, the heavy metal content is less, which can completely replace or is even better than the market silica white product and also eliminates the environmental pollution of the rice husk ash.

The invention belongs to the technical field of composite membrane materials, and particularly relates to a preparation method for a layered double hydroxides composite material and an application of the layered double hydroxides composite material in heavy metal wastewater. The preparation method comprises the steps of: by adopting a coprecipitation method, firstly preparing a nitrate or chlorate aqueous solution A of divalent metal cations M<2+> and a nitrate or chlorate aqueous solution of trivalent metal cations M<3+>, and adding an aqueous solution C wherein organic salt of a heavy metal ion chelating agent is fully dispersed; obtaining layered double hydroxides of the heavy metal ion chelating agent through aging, vacuum drying, crushing and sieving; and mixing the layered double hydroxides with PVA to prepare a membrane and then preparing an LDHs / PVA composite membrane. As a composite membrane adsorbing material is soaked into heavy metal wastewater containing Cu<2+>, Cd<2+> or Pb<2+>, the adsorption rate can reach 92%. The method provided by the invention is mild in preparation condition and low in cost and has a good application prospect.

The invention discloses an anti-allergy skin care cream and a preparing method thereof, aims at providing an anti-allergy skin care cream which has the moisture preserving, anti-allergy and repairing effects and is safe, mild and free of irritation to the human body and belongs to the technical field of cosmetics. According to the technical scheme, the anti-allergy skin care cream is prepared, by weight, 3.5-6.5% of an emulsifying agent, 0.5-2% of a co-emulsifying agent, 5-12% of grease, 2-5% of functional grease, 0.5-2% of antioxidant, 0.05-0.1% of a metal ion chelating agent, 6-12% of polyhydric alcohol, 2-8% of a humectant, 0.2-0.7% of an aqueous-phase thickening agent, 0.1-0.6% of a thickening stabilizing agent, 6-20% of a skin conditioner, 0.5-1.5% of plant preservative and the balance water, wherein the total weight percent is 100%. The skin conditioner includes mirabilis jalapa extract.

The acid pickling promoter for iron and steel consists of inorganic salt as reducing agent 10-80 wt%, organic metal ion chelating chelating agent 1-20 wt%, synergist 1-20 wt% and water 10-50 wt%. The acid pickling promoter is suitable for being added into acid pickling liquid to promote the elimination of dense oxide scale on the surface of steel, shapes and other iron and steel product. It can raise the surface quality of silicon steel plate after being acid pickled, shorten acid pickling period, reduce acid consumption and improve acid pickling environment.

The invention discloses a preparation method of ion imprinted hydroxamic acid chelate resin. According to the invention, propenyl hydroxamic acid is subjected to coordination with imprinting metal ions such as manganese, copper, cobalt, nickel, lanthanum, cerium, yttrium, praseodymium, neodymium, and the like; under the effects of a crosslinking agent and an initiating agent, a propenyl hydroxamic acid-metal ion chelate is polymerized; and the imprinting metal ion is eluted, such that the ion imprinted hydroxamic acid chelate resin is obtained. The method provided by the invention has the advantages of mild reaction condition and high reaction efficiency. The prepared resin has the advantages such as high absorption capacity, high absorption selectivity, and the like.

The invention discloses supramolecular polymer clean fracturing fluid resistant to high temperature of 170 DEG C. The fracturing fluid is prepared from the following components in percentage by weight: 0.2 to 0.5 percent of thickening agent for the clean fracturing fluid, 0.1 to 0.5 percent of viscosity synergist, 0.2 to 0.4 percent of structural intensifier, 0.05 to 0.2 percent of deoxidant, 0.1 to 0.3 percent of metal ion chelating agent, 1 to 2 percent of clay stabilizer and the balance of fresh water. According to the clean fracturing fluid, a reversible supramolecular network structure is formed through the intermolecular interaction, and the thickening agent is low in use concentration and can be used for effectively controlling the viscosity of a base solution of the fracturing fluid and improving the pumping performance of the fluid; viscoelastic sand-carrying of the fracturing fluid is realized by low viscosity and high viscoelasticity; the temperature resistance can reach 170 DEG C under a long-term shear condition; the shear resistance is excellent, and the fluid viscosity and the structure after high shear can be effectively recovered; the construction friction is low, and the equipment load and the fracturing construction risk are reduced; the residue content is low, so that the damages to a reservoir stratum and prop fractures are greatly reduced, and the fracturing stimulation effect is greatly improved.

A method of removing a selected two or more different metal-ion sequestering agents for removing one or more designated metal ions. The method includes subjecting a liquid to a first metal-ion sequestering agent for removing a first designated metal ion prior to placing the liquid in a container; providing the container for holding the liquid, the container having an internal surface having a second metal-ion sequestering agent provided on at least a portion of the internal surface for removing a second designated metal-ion from the liquid; filling the container with the liquid in an open environment; and closing the container with the liquid contained therein.

The invention relates to a chemical cleaning material, and in particular to a special chemical cleaning material for removing scale of a water heater. The special antiscaling agent for the water heater is characterized by being formed by mixing components A, B, C and C, wherein the component A is an acidic antiscaling component which is 70 to 95% in percentage by weight; the component B is an adhesive which is 2 to 8% in percentage by weight; the component C includes a metal ion chelating agent and a curing agent, which is 2 to 20% in percentage by weight; and the component D is a corrosion inhibitor, which is 1 to 5% in percentage by weight. With the adoption of the prescription, the special antiscaling agent for the water heater provided by the invention has the advantages of being relatively low corrosion to metal, and high antiscaling performance; and moreover, the special antiscaling agent can be manufactured in a certain shape, and the dimension is in line with that of a sewage draining port of the water heater; and the antiscaling agent can be directly added to the water heater through the sewage draining port; the problem that the powdered material or liquid is hardly added can be solved; the antiscaling agent is convenient and quick to use, and the operation is simple to carry out.

This invention relates to a composition of matter comprising a functionalized mordant polymer comprising a cationic polymer having an adsorbed metal-ion sequestrant, wherein the metal-ion sequestrant has a stability constant greater than 1010 with iron (III). It further relates to an article comprising said composition and a method of removing target metal-ions from an environment comprising contacting the environment with said composition.

Belonging to the technical field of soil remediation, the invention in particular relates to an in-situ full-automatic contaminated soil remediation device. Disposed on a delivery vehicle, the device comprises a soil metal ion chelating agent and acid-base neutralizing agent injection instrument, a metal ion electrokinetic remediation instrument, a soil remediation microbial spray instrument, a rotary tillage and rotovation instrument, and a microcomputer control system. Specifically, the soil metal ion chelating agent and acid-base neutralizing agent injection instrument, the soil remediation microbial spray instrument, the metal ion electrokinetic remediation instrument and in electric connection with the microcomputer control system. The soil metal ion chelating agent and acid-base neutralizing agent injection instrument and the soil remediation microbial spray instrument respectively perform chemical chelation remediation and microbial in-situ remediation on the contaminated soil. The metal ion electrokinetic remediation instrument performs electrokinetic remediation on the contaminated soil. The rotary tillage and rotovation instrument is connected to a power unit of the delivery vehicle through a rotary tillage and rotovation transmission unit. And the rotary tillage and rotovation instrument performs aeration oxidation remediation on the contaminated soil. The in-situ full-automatic contaminated soil remediation device provided by the invention has the characteristics of high degree of automation, high efficiency, low energy consumption, and environmental protection, etc.

The present invention relates to composite heat resisting antioxidant for polyolefin and its production process and application. The composite heat resisting antioxidant consists of hindered phenol antioxidant 20-75 wt%, phosphate antioxidant 20-75 wt%, and chelating metal component containing at least bisamide-metal ion chelating structure 5-50 wt%, and is prepared through physical mixing and airflow crushing. The composite heat resisting antioxidant is applied in polyolefin product and can raise the ageing resisting performance of polyolefin product, especially greenhouse film, greatly.

The invention belongs to the field of medicinal preparations, and mainly provides freeze-dried powder injection consisting of esomeprazole sodium, a propping agent, a metal ion chelant and a proper amount of pH regulator, and a preparation method for the injection. The freeze-dried powder injection has the advantages of compact form, high stability and small toxic and side effects, and is suitable for clinical application.