141 results about "Ion complexation" patented technology

The present invention features a method for the formation of superporous hydrogels using an ion-equilibration technique. Anionic polysaccharides are included in the hydrogel reaction mixture and cations are introduced either during or after hydrogel formation. Properties of the resulting hydrogel can be subsequently adjusted by treating the cation-complexed gel with a different cation or cation mixture under equilibrating conditions. It has been found that by properly adjusting the cations and the sequence in which they are used in the equilibration process, superporous hydrogels can be formed that are highly absorbent while maintaining favorable structural properties, including strength, ruggedness, and resiliency. It has also been found that applying appropriate dehydration conditions to them after their formation can further stabilize the superporous hydrogels formed by the method of the invention.

The invention relates to the field of concrete additives and specifically relates to a mud content inhibitor for concrete doped with a polycarboxylic acid type water reducer and a preparation method and an application method of the mud content inhibitor. The mud content inhibitor is prepared by the following raw materials of, by weight, 20%-30% of mud dispersion components, 0.5%-5% of mud adsorption components, 0.5%-5% of ion complexation exchange components and the balance water. The preparation method includes firstly, uniformly stirring water and the mud dispersion components, and adding and uniformly stirring the mud adsorption components and the ion complexation exchange components. The application method includes that the usage amount of the mud content inhibitor is 2-5 wt. % of that of the polycarboxylic acid type water reducer. By means of the mud content inhibitor, the liquidity and the slump-retaining performance of the concrete can be increased, the viscosity of the concrete is reduced, the work state of the concrete can be improved, the adsorption quantity of high valence metal ions to the polycarboxylic acid type water reducer can be reduced, and the performance of the concrete doped with the polycarboxylic acid type water reducer is guaranteed.

The invention relates to a purification technical method for attapulgite clay. The purification technical method comprises the following steps of: putting an active agent serving as a dispersion agent between the crystal faces of the attapulgite clay, so that the bonding force between crystal layers is weakened, and crystal stacked layers are released; applying proper mechanical action to fully separate attapulgite clay from impurities such as sand, and achieving a preliminary purification effect; then separating impurities such as dolomite and quartz in attapulgite clay powder by taking inorganic salt as a purification agent through adsorption and electrochemical action; and complexing inorganic salt and multivalent ions such as ferrum, copper, calcium and magnesium to form a stable water-soluble complex, wherein under the complexing action, color change caused by metal is prevented, and the purpose of improving the color of the attapulgite clay powder is fulfilled; and therefore, the attapulgite clay with the purity of over 99.5 percent is obtained.

The present invention describes polymer nanoparticles with a cationic surface potential, in which both hydrophobic and hydrophilic pharmaceutically active substances can be encapsulated. The hydrophilic and thus water-soluble substances are encapsulated in the particle core by co-precipitation through ionic complexing with a charged polymer. Both therapeutic agents and diagnostic agents can be used as pharmaceutically active substances for encapsulation. The cationic particle surface permits stable, electrostatic surface modification with partially oppositely charged compounds, which can contain target-specific ligands for improving passive and active targeting.

The invention relates to a molecular engram polymer, which is used for metal ion detection. The engram and elution objects are metal complex ions; engram geometric dimensioning and combination point location of the polymer are matched with the specificity of the metal complex ions; the polymer is synthesized in-situ on metal membrane surface of a quartz microbalance and a surface plasma resonance device, the metal complex ions are eluted, the metal ions to be detected are processed by complexation and then are selectively absorbed by the molecular engram polymer, and finally the type and content of the metal ions are detected. In the invention, metal ion complexation is adopted to enlarge small changes of metal ion volume by a large extent, template molecular geometric structure memory performance of the molecular engram polymer is utilized to realize high preferential adsorption to improve metal ion detection selectivity effectively, and mass increase and geometric dimensioning enlargement caused by metal ion complexation help further improve sensitivity and antijamming capability of metal ion detection.

The invention discloses an iron-containing aluminum chloride solution iron removal method. The method comprises treating an iron-containing aluminum chloride solution by an anion exchange resin column so that iron ions are adsorbed by the resin column and the ion adsorption resin column and the aluminum chloride solution without iron are obtained. The iron-containing aluminum chloride solution iron removal method has anion exchange resin-based iron ion selective adsorptivity better than aluminum ion selective adsorptivity because of easy iron ion complexation effects. When the iron-containing aluminum chloride solution goes through the anion exchange resin column, iron ions in the aluminum chloride solution and anions in the resin are compounded and form a negative ion complex so that iron ions can be adsorbed by the resin column and iron removal is realized. The anion exchange resin-based iron selective adsorption removal method has a high iron removal rate and a low cost and does not produce additional pollution.

The invention relates to an application of a metal ion complexing agent in a waste and old lithium iron phosphate battery recovery process. The metal ion complexing agent is used for the waste and oldbattery recovery process to eliminate the interference effect of PO43-, and high-purity lithium carbonate is finally obtained; concretely, the waste and old battery is pre-processed to obtain black powder, then the black powder is dissolved in a complex formulation solution of dilute acid and an oxidizing agent, and the materials are heated and stirred and filtered to obtain a Fe and Li-containing filtrate; the metal ion complexing agent is added, and a pH value is added to obtain an enrichment solution containing Li+; the enrichment solution is heated and concentrated, CO32- is introduced, and Li2CO3 precipitate is obtained. A recovery target is a precious lithium resource in a lot of the waste lithium iron phosphate batteries on market, the raw material source is wide, and the purity ofLi2CO3 is obviously increased; in addition, the process is simple, the recovery rate is high, the cost is controllable, the process is easy for industrial popularization and application, the nationalprecious lithium resource can be saved, and the circular economy is developed.

A process for regenerating a facilitated-transport membrane, such as a gas separation membrane, that contains an ionic complexing agent, and that has lost performance as a result of reduction of at least some of the ions to a less charged or uncharged form. The process involves exposing the membrane to an oxidizing agent, such as hydrogen peroxide. The invention also includes membranes that have been regenerated in this way, and their use, particularly for separating light olefins from light paraffins by membrane gas separation.

A post-etch residue cleaning composition for cleaning ashed or unashed aluminum / SiN / Si post-etch residue from small dimensions on semiconductor substrates. The cleaning composition contains supercritical CO2 (SCCO2), alcohol, fluoride source, an aluminum ion complexing agent and, optionally, corrosion inhibitor. Such cleaning composition overcomes the intrinsic deficiency of SCCO2 as a cleaning reagent, viz., the non-polar character of SCCO2 and its associated inability to solubilize species such as inorganic salts and polar organic compounds that are present in the post-etch residue and that must be removed from the semiconductor substrate for efficient cleaning. The cleaning composition enables damage-free, residue-free cleaning of substrates having ashed or unashed aluminum / SiN / Si post-etch residue thereon.

The invention provides a preparing method for a non-precious metal ion complexation Schiff base graphene catalyst and belongs to the technical field of fuel batteries. The preparing method comprises the steps that firstly, amidogen functional groups are grafted to the edge flaw positions of a graphene sheet; secondly, the amidogen functional groups are converted into Schiff base functional groups through amine-aldehyde condensation; finally, complexation is carried out on non-precious metal ions, and the non-precious metal ion complexation Schiff base graphene catalyst of an adjustable three-dimensional stereostructure is obtained. According to the preparing method, the complexation action of the non-precious metal ions and the Schiff base is ingeniously used, a link is formed between layers of graphene, the three-dimensional cross-linked graphene catalyst stereostructure is formed, and the electron conduction capability between layers of the graphene and the mass transfer speed in the layers are increased; meanwhile, a large quantity of metal Schiff base complex catalytic activity sites are generated, concerted catalysis with the graphene is achieved, and the catalytic activity is improved. The operation is simple, industrialization production is easy, and the prepared catalyst can be widely applied to fuel batteries with proton exchange films as electrolytes.

The invention relates to a chemically modified graphene oxide ionic sewage treatment agent, which is characterized in that the modified graphene oxide is formed by connecting graphene oxide and organic phosphate through chemical bonds formed by organosiloxane; The adsorption of graphene oxide to high-valent metals, the complexation of organic phosphate and carboxylate to metal ions, and its application to heavy metal ion sewage treatment, a chemically modified graphene oxide ion-type sewage treatment agent of the present invention , for Pb 2+ 、Cr 6+ The adsorption capacity of heavy metal ions such as ions is far greater than that of graphene oxide; the invention also provides a preparation method of chemically modified graphene oxide ion adsorption sewage treatment agent. The graphene oxide ionic sewage treatment agent prepared by the invention has strong selectivity for heavy metal ion adsorption and excellent effect, and can be used for industrial sewage treatment containing heavy metal ions.

The invention discloses a preparation method of antibacterial carboxymethyl chitosan hydrogel. The preparation method of the antibacterial carboxymethyl chitosan hydrogel is characterized by comprising the following steps of (1) preparing carboxymethyl chitosan; (2) combining the carboxymethyl chitosan with transition metal ions through ion complexation reaction to prepare the antibacterial carboxymethyl chitosan hydrogel. The method has the advantages that the system is simple; the reaction is fast; the gel plasticity is high, and the like. Meanwhile, the carboxymethyl chitosan in a system and the transition metal ions have good sterilization effect, so that the goal of duplex sterilization is achieved. The antibacterial carboxymethyl chitosan hydrogel is different from conventional micromolecular antibacterial agents; the more broad-spectrum antibacterial activity is realized.

This invention relates to cationic lipids. More particularly the invention relates to biodegradable cationic lipids having a plurality of cationic headgroups and one or more lipophilic tail groups. The lipids are of utility in various applications, and in particular in permitting transfection of molecules, and in particular DNA and RNA, into cells. As such the lipids have specific utility in the field of gene therapy as well as other applications such as delivery of small molecules into cells, detergents, and metal ion complexation for medical or industrial applications.

The invention discloses a photocatalyst for degrading formaldehyde based on complexing stable dispersion, and a preparation method and an application thereof. The photocatalyst comprises 0.2-50wt% of a titanium source, 0.005-1wt% of a hydrolysis inhibitor, 48-98wt% of deionized water, 0.1-25wt% of a crystal form control agent and 2-25wt% of a titanium ion complexing agent; and the photocatalyst is a transparent hydrosol of nanometer titanium dioxide, the pH value of the photocatalyst is 7-8, the particle size of the photocatalyst is 10-30nm, and the crystal form of the photocatalyst is anatase. The combination of the titanium ion complexing agent and the crystal form control agent makes no agglomeration appear among nanoparticles and also makes the nanoparticles not affected by high and low temperature impact; and the complexing agent obviously improves the film formation adhesion and uniformity in the film forming process to make a colorless transparent nanometer titanium dioxide film, and the formed film has good film forming adhesion and no efflorescence shedding phenomenon. The above obtained product in the invention has the advantages of all inorganic components and no secondary pollution, and has a very good catalytic degradation effect on formaldehyde under ultraviolet light even indoor weak light conditions.

The invention provides a clindamycin phosphate injection preparation and a prescription thereof. According to the prescription, the clindamycin phosphate injection preparation comprises clindamycin phosphate, a cosolvent, a metal ion complexing agent, a solvent of raw materials and auxiliary materials and the like. The invention aims to provide a method for preparing the clindamycin phosphate injection preparation with more advanced technology and better product quality.

A preparation method and application of a graphene-polypyrrole electrochemical sensor for trace lead ion detection belong to the field of environmental analysis. The invention utilizes the complexation of the nitrogen atom on the amine group in the polypyrrole and the lead ion to obtain high selectivity and the high conductivity of the graphene nanosheet to amplify the signal and realize the detection of trace lead ions. The presence of graphene can also increase the steric binding sites of the composite material and the interfacial electron transfer rate, thereby improving the detection effect of the sensor. Due to the synergistic effect of graphene nanosheets and polyaniline, the graphene-polypyrrole electrochemical sensing method has the characteristics of high sensitivity and high selectivity. ‑The preparation method of the polypyrrole electrochemical sensor is simple and controllable, without secondary pollution. The invention has wide application prospects in in-situ monitoring of trace lead ions in water bodies.

The invention discloses a 4'-pyridylpyrimidine compound and a synthetic method and application thereof. By using a derivative iso-longitolanone of natural renewable resource turpentine as a raw material, a novel 4'-pyridylpyrimidine compound is prepared. Iso-longitolanone and 4-pyridylaldehyde are subjected to condensation to generate 7-(pyridine-4'-yl-methylene)iso-longitolanone; 7-(pyridine-4'-yl-methylene)iso-longitolanone and guanidine hydrochloride are subjected to condensation and cyclization to obtain a 4'-pyridylpyrimidine compound 6,6,10,10-tetramethyl-4-(pyridine-4'-yl)-5,7,8,9,10,10a-hexahydro-6H-6a,9-methanobenzo-2-quinazolinamine. The compound can specifically recognize copper ion, can be specifically complexed with Cu<2+> ion and generates quenching of blue fluorescence. Thus, the compound can be used as a fluorescence probe for detection of copper ion and has good practicality.

The invention discloses an autolysable high-strength quick-adhesion hydrogel, a preparation method and applications thereof, wherein the vinyl monomer N-acryloylglycine of a glycine derivative with good biocompatibility and nanometer active inorganic nanoparticles are used as reactants and are subjected to one-step free radical copolymerization under ultraviolet irradiation by using a photoinitiator to prepare the autolysable high-strength quick-adhesion hydrogel. According to the invention, through a large number of hydrogen bonds formed between the PACG molecular side chains in the formed hydrogel, the ion complexing of the carboxyl at the tail end of the molecular chain and the inorganic ions, and the physical adsorption effect between the polymer chain and the nanoparticles, the hydrogel is endowed with excellent mechanical properties, has extremely good adhesion strength to various matrixes, and shows good biocompatibility.

A method of treating a zone of a subterranean formation penetrated by a wellbore, the method including the steps of: (a) forming a treatment fluid comprising: (i) water; (ii) a strong acid); (iii) a water-soluble polymer having at least one functional group that can be crosslinked with aluminum(III); (iv) a water-soluble aluminum carboxylate; and (v) a complexion agent for calcium ions; wherein the pH of the treatment fluid is less than the pH required for the aluminum to crosslink the polymer to form a crosslinked gel; (b) introducing the treatment fluid through the wellbore into the zone; and (c) allowing time for the strong acid in the treatment fluid to spend in the formation such that the pH of the fluid increases sufficiently for the aluminum of the aluminum carboxylate to crosslink the polymer.

The invention provides a zedoary oil injection. According to a preparation method, zedoary oil is used as an active ingredient, polyethylene glycol-12-hydroxy stearic acid ester (abbreviated as HS15) is used as a cosolvent, and a metal ion complexing agent, glucose and other pharmaceutic auxiliary materials are added properly and mixed with water for injection, thus obtaining the zedoary oil injection. According to the formula and the preparation process, the zedoary oil injection conforming to the standard of 'Chinese Pharmacopoeia' can be prepared; and the pharmaceutic auxiliary material HS15, of which the safety is higher than that of Twain 80, is adopted, so that the safety of the zedoary oil injection is improved greatly. The prepared zedoary oil injection is controllable in quality, good in stability, high in safety and simple in preparation process.

The invention relates to a coarsening micro-etching liquid of a sulfuric acid and hydrogen peroxide system and an application thereof. The coarsening micro-etching liquid comprises sulfuric acid, hydrogen peroxide, a corrosion inhibitor, halide ions, a complexing agent and water. The coarsening micro-etching liquid of a sulfuric acid and hydrogen peroxide system is low and stable in micro-etchingrate in the micro-etching process, the copper ion capacity is high, the board surface roughness is uniform after micro-etching, blackening is avoided, a dry membrane and a copper surface can be more tightly combined, and the reject ratio of circuit manufacturing is greatly reduced. The preparation method is simple to operate, low in cost, free of environmental pollution and suitable for industrialproduction.

Electroless copper plating compositions including (a) copper ions, (b) a complexing agent for copper ions, (c) a reducing agent, (d) a pH adjustor and (e) a stabilizer is disclosed. The stabilizer has a specific chemical structure, and contributes to stable an electroless copper plating composition from decomposition.

The invention discloses a stable terbutaline sulfate injection, wherein 1 ml of the stable terbutaline sulfate injection comprises 0.1-0.4mg of terbutaline sulfate, 8.0-10mg of sodium chloride and the balance of water for injection. In the preparation process of the stable terbutaline sulfate injection, nitrogen is used for protection so that the using of antioxidant can be decreased; low-temperature preparation is adopted to control the stability of the product so that the impurity stability after steam sterilization is ensured and the metal ion complexing agent can be decreased. According to the stable terbutaline sulfate injection and the preparation process thereof, the problem of adding other auxiliary materials to maintain the stability of the preparation in a clinic intravenous fluid is solved and the clinic safe medication is ensured.

The invention discloses a 5-aminolevulinic acid nano particle as well as a preparation method and a device thereof. The 5-aminolevulinic acid nano particle comprises therapeutically effective amount of 5-aminolevulinic acid, ion chelating agent and biodegradable polymer. The 5-aminolevulinic acid nano particle provided by the invention is stable in property, high in targeting selectivity, high in cell absorption rate, weakened in photo-bleaching phenomenon, and reinforced in photodynamic reaction, and is capable of enhancing tissue penetration depth combined with injection or micro-needle drug administration, so the 5-aminolevulinic acid nano particle has high application value.

The invention relates to the field of catalyst regeneration, and relates to a regenerative cleaning solution of a denitration catalyst. The regenerative cleaning solution comprises 0.01-2 g / L low-foam surfactant and 1-15 g / L ion complexing agent, wherein the low-foam surfactant comprises one or more of alkylphenol polyoxyethylene ether, dodecyl sulfate, fatty amine alkylamine polyoxyethylene ether, a condensation compound of fatty alcohol and ethylene oxide, fatty alcohol polyoxyethylene ether sulfate and lauryl sulfate; and the ion complexing agent comprises polybasic carboxylic acid and / or hydroxy carboxylic acid. The regenerative cleaning solution of the denitration catalyst can effectively remove the stains on the surface of the inactive denitration catalyst so as to restore the activity of the denitration catalyst. In addition, the invention further provides a regeneration method of the denitration catalyst. The regenerative cleaning solution of the denitration catalyst is used in the method. By adoption of the method, the inactive denitration catalyst can be cleaned to restore the activity.

The invention discloses a tetraphenylethylene derivative fluorescent probe and a preparation method thereof. The method includes: taking dibromo-substituted dimethyl TPE as the main component to synthesize a compound M2, and using imidazole to replace dibromo to prepare a compound M3; and complexing the compound M3 with Zn ion through the coordination bond of lone pair electrons to obtain the target product M4. The compound M3 has the ability of coating adriamycin for drug delivery, and as a fluorescent probe, the target product M4 can undergo fluorescence quenching with some organic explosives, and the response to p-nitrophenol is the most obvious, therefore the target product M4 can be used as a fluorescent detection probe for explosives.

The invention discloses a soil heavy metal pollution in-suit capturing treating method. The soil heavy metal pollution in-suit capturing treating method comprises following steps: 1) a heavy metal capturing agent is packaged with a permeable device; 2) the permeable device is buried in water-containing polluted soil; 3) the time of the permeable device buried in water-containing polluted soil is determined based on requirements, wherein when the permeable device is buried in soil aqueous solution, reactions such as ion exchange, ion complexation, and ion absorption of heavy metal ions in soil aqueous solution with the heavy metal capturing agent are realized via concentration diffusion, and the heavy metal ions are captured; and 4) the permeable device buried in soil is removed, and the heavy metal capturing agent is removed after capturing heavy metal, so that the heavy metal elements in soil are removed. The soil heavy metal pollution in-suit capturing treating method is capable of removing heavy metal capturing products effectively; operation is simple; soil physicochemical properties are not influenced; soil ecological functions are maintained; no secondary environmental risk is caused; treatment effect is excellent; and cost is low.

The invention relates to a wire drawing liquid and concretely relates to a corrosion-resistant scale-inhibition magnesium-aluminum alloy wire drawing liquid. The corrosion-resistant scale-inhibition magnesium-aluminum alloy wire drawing liquid is prepared from 28-32 parts by weight of hydrogenated castor oil, 2-3 parts by weight of sodium benzotriazole, 2-3 parts by weight of algal polysaccharide, 15-18 parts by weight of trihydroxymethylpropyl trioleate, 4-6 parts by weight of butylated hydroxyanisole, 2-3 parts by weight of sodium lactate, 1-2 parts by weight of coptis root extract, 1-2 parts by weight of potassium dihydrogen phosphate, 6-8 parts by weight of polyglycol laurate, 1-2 parts by weight of rosmarinic acid, 2-3 parts by weight of vulcanized paraffin, 4-5 parts by weight of an assistant and 800-1000 parts by weight of deionized water. The base oil of the wire drawing liquid has excellent high-temperature lubricity. Algal polysaccharide can effectively delay grease oxidation and has metal ion complexation capacity so that chips on the mold are avoided. Coptis root extract and rosmarinic acid are two natural eco-friendly bioactive substances and have effects of inhibiting bacteria and resisting corrosion and oxidation. The wire drawing liquid has good wire drawing effects. The wire prepared from the wire drawing liquid has the advantages of no scratch on the surface, high cleanability, difficult sediment incrustation on the mold, difficult corruption and deterioration at a normal temperature, and long life.

The invention relates to an ultra-high molecular poly(methyl)acrylic acid ester powder which comprises (methyl)acrylic acid ester, other alkene unsaturated monomer, an emulsifier, an oil-soluble oxidizing agent, a water-soluble reducing agent, an ion complexing agent and a pH buffering agent, wherein based on the total weight of (methyl)acrylic acid ester and other alkene unsaturated monomer, the emulsifier is 10-30%, the oil-soluble oxidizing agent is 0.1-0.4%, the water-soluble reducing agent is 0.01-0.1%, the ion complexing agent is 0.1-2%, and the pH buffering agent is 0.1-1%. The invention also provides a preparation method of the powder and an application of the powder in 3D laser printing. According to the invention, thermal decomposition temperature of the powder rises to 300-315 DEGC. Meanwhile, due to introduction of the oil-soluble oxidizing agent and the water-soluble reducing agent, an aqueous phase reaction is inhibited; and with the combination of the emulsifier, a product with controllable size and relatively uniform particle size can be obtained.