47 results about "Cyclohexanediaminetetraacetic acid" patented technology

To provide a technique for realizing high-precision surface planarization when copper is used as a wiring metal. A polishing compound is used which comprises water; a peroxide oxidizer; a surface protective agent for copper; at least one first chelating agent selected from the group consisting of tartaric acid, malonic acid, malic acid, citric acid, maleic acid, oxalic acid and fumaric acid; and at least one second chelating agent selected from the group consisting of triethylenetetramine, ethylenediaminediacetic acid, ethylenediaminetetraacetic acid, tetraethylenepentamine, glycol-ether-diaminetetraacetic acid, trans-1,2-cyclohexanediaminetetraacetic acid, o-phenanthroline, and derivatives thereof.

Reducing inhibition of the photochemical crosslinking by including in the photosensitive polyimide precursor composition a metal inhibitor selected from 1H-tetrazole, 1,2-cyclohexenediamine tetraacetic acid hydrate and 5-mercaptobenzimidazole.

The objective of the invention is to provide a method for determining the content of fluorine in mold flux for continuous casting by using a fluoride ion selective electrode. The method comprises thefollowing concrete steps: (1) drawing a standard fluorine curve: with cyclohexanediaminetetraacetic acid-dipotassium phosphate-potassium dihydrogen phosphate as a total ion concentration buffer solution (with a pH value of 5.8), separately determining the potential values of the fluorine ion selective electrode in solutions ranked according to a sequence from low concentration to high concentration at a temperature of 30 DEG C with a saturated calomel electrode as a reference electrode, and drawing a figure E(mv)-lg(cF<->) (mg / l) of the potential values and the logarithmic values of fluorinions so as to obtain the fluorine standard curve; (2) in a muffle furnace, subjecting a sample of the mold flux for continuous casting to decomposition in a corundum crucible under the action of a mixedflux of Na2O2 and ZnO; (3) subjecting slag in the crucible to leaching with hot water, filtering and washing, and carrying out fixing to a constant volume; and (4) taking a sample solution, adding thetotal ion concentration buffer solution, carrying out fixing to a constant volume, determining the potential of the electrode in the formed test solution, finding out a corresponding fluorine concentration in the standard curve, and calculating the content of fluorine in the sample of the mold flux for continuous casting.

The invention discloses a ceramic cleaning agent and a preparation method thereof. The ceramic cleaning agent is composed of industrial alcohol, glycol, a cation activator, an amphoteric surfactant, sodium ortho-cyclohexanediaminetetraacetate, citric acid, bromothymol blue, an aromatic and softened deionized water according to a certain weight percentage. The preparation method comprises the following steps of at a normal temperature, adding softened deionized water into a container, then adding industrial alcohol and glycol into the container, carrying out stirring for full mixing, adding other raw materials into the solution, carrying out full stirring until the raw materials are completely dissolved, and putting the solution into a pot, a bottle or a bag. The ceramic cleaning agent has good cleaning effects, can clean old and stubborn stains on the ceramic surface, is not influenced by a temperature easily, has no corrosivity, does not damage surface enamel and ceramic body of ceramic and realizes good ceramic surface brightness after cleaning. Cleaning waste water of the ceramic cleaning agent does not pollute the environment. The ceramic cleaning agent is a novel environmentally-friendly product and has effects of sterilization, disinfection and peculiar smell removal. The preparation method has simple processes and a moderate cost and can be popularized.

The present invention discloses a method and a composition for removing metal sulfide scale present on the surface of a metal, said method comprising:providing a liquid composition comprising:a chelating agent and a counterion component selected from the group consisting of: sodium gluconate; gluconic acid; tetrasodium EDTA; EDTA; propylenediaminetetraacetic acid (PDTA); nitrilotriacetic acid (NTA); N-(2-hydroxyethyl) ethylenediaminetriacetic acid (HEDTA); diethylenetriaminepentaacetic acid (DTPA); hydroxyethyliminodiacetic acid (HEIDA); cyclohexylenediaminetetraacetic acid (CDTA); diphenylaminesulfonic acid (DPAS); ethylenediaminedi(o-hydroxyphenylacetic) acid (EDDHA); glucoheptonic acid; gluconic acid; oxalic acid; malonic acid; succinic acid; glutaric acid; adipic acid; pimelic acid; suberic acid; azelaic acid; sebacic acid; phthalic acid; terephthalic acid; aconitic acid; carballylic acid; trimesic acid; isocitric acid; citric acid; L-glutamic acid-N,N-diacetic acid (GLDA); salts thereof; and mixtures thereof; andan aldehyde; andwaterexposing a surface contaminated with said metal sulfide scale to the liquid composition;allowing sufficient time of exposure to remove said metal sulfide scale from the contaminated surface and sequestration of the sulfur ions from solution.

The invention relates to an ultrafast settlement type composite heavy metal capturing agent, and a production method and an application thereof. The ultrafast settlement type composite heavy metal capturing agent is prepared from water-soluble polymethylolacrylamide-grafted-(sodium polyvinylaminocyclohexanediacetate-random-polyvinylaminodithiocarbamate), sodium di-n-butyldithiocarbamate, water andpotassium hydroxide, and the ultrafast settlement type composite heavy metal capturing agent is used to treat heavy metal wastewater discharged in the processes of electroplating, smelting, mining, mineral separation, chemical engineering and mechanical engineering. The capturing agent has a low cost, each basic unit can provide hexacoordination atoms to carry out strong chelating adsorption, andcommonly act together with the sodium di-n-butyldithiocarbamate to adsorb complexation type heavy metal ions, and can be compounded with heavy metals in an ultrafast manner to generate a large aggregation in seconds to achieve rapid settlement, so the capturing agent is convenient to operated, and is conducive to be promoted.

The invention relates to a degradable heavy metal capture agent as well as a preparation method and application thereof. The degradable heavy metal capture agent is characterized by being prepared from konjac glucomannan, water, an initiator, namely azobis(isobutyramidine) dihydrochloride V-50, N-vinylformamide, cyclohexanediamine tetraacetic dianhydride, potassium hydroxide and carbon disulfide.The degradable heavy metal capture agent can be used for treating heavy metal wastewater discharged during electroplating, smelting, mining, mineral separation, chemical engineering, machinery and thelike. According to the capture agent disclosed by the invention, complexing heavy metal ions can be adsorbed by novel chelating functional groups grafted by a synthetic konjac glucomannan macromolecular framework, each basic unit can provide hexa-coordinate atoms for performing strong chelating adsorption, and large aggregate is further produced in seconds by virtue of a chemical precipitation reaction carried out between dithiocarbamate on a sedimentation-aided side chain grafted by konjac glucomannan and a sedimentation assistant, so as to implement rapid sedimentation.

The invention relates to a biomass chelate-modified heavy metal composite capturing agent, and a preparation method and an application thereof. The biomass chelate-modified heavy metal composite capturing agent is prepared from konjac glucomannan, water, an initiator 2,2'-azobis[2-methylpropionamidine] dihydrochloride V-50, N-vinylformamide (NVF), 1,2-cyclohexanediaminetetraacetic acid dianhydride, potassium hydroxide, carbon disulfide and sodium di-n-butyldithiocarbamate, and the biomass chelate-modified heavy metal composite capturing agent is used to treat heavy metal wastewater dischargedin the processes of electroplating, smelting, mining, mineral separation, chemical engineering and mechanical engineering. Complexation type heavy metal ions are adsorbed through the common action ofa konjac molecule skeleton-grafted novel chelating function group VACDTANa and the sodium di-n-butyldithiocarbamate, and generate a large aggregation in seconds through the synergistic effects of thekonjac molecule skeleton-grafted sodium dithiocarbamate and sodium di-n-butyldithiocarbamate and a chemical precipitation reaction of a settling aid in order to achieve rapid settlement.

The invention discloses a preparation method of a neutral cleaning agent for rust removal of metal surfaces. The cleaning agent is characterized in that a liquid A is prepared from 52-56% of ethyl alcohol, 42-46% of phosphoric acid and 1-3% of oleic acid-based imidazoline; a liquid B is prepared from 83-87% of water, 1-3.0% of cyclohexanediamine tetraaceticacid, 3-6% of glycine betaine and 8-12% of glucosamine; a liquid C is prepared from 62-66% of water, 24-28% of tri-isopropanolamine and 8-12% of a water-soluble defoaming agent; in a reactor, the liquid A, the liquid B and the liquid C are stirred for 2 hours according to a volume proportion of 1:1:1 at the rotation speed of 200 turns per min, and then the neutral cleaning agent for rust removal of the metal surfaces is obtained. The pHvalue of the cleaning agent is within the range from 6.0 to 7.5; a dust removal agent and a waste liquid generated after cleaning are both neutral, acid mist cannot be generated, iron and steel structures cannot be corroded, and meanwhile, the cleaning agent has corrosion resistance and is capable of preventing secondary corrosion, safe and environmentally friendly during use and suitable for popularization.

The invention relates to a water-soluble ternary polymer molecular brush anionic dye capture settling agent, and a preparation method and application thereof. The water-soluble ternary polymer molecular brush anionic dye capture settling agent is characterized by being prepared by a polymer main-chain poly(hydroxyethyl acrylamide), a cationic high-molecular side-chain poly(methacrylatoethyl trimethyl ammonium chloride) containing carboxyl groups at tail ends, a functional high-molecular side-chain precursor polymer poly(N-vinylformamide) containing carboxyl groups at tail ends, water, a catalyst which is N-hydroxysuccinimide, a 1-ethyl-3-(3-dimethylaminopropyl) carbodiimide iodomethane salt, potassium hydroxide, 1,2-cyclohexane diamine tetraacetic acid dianhydride and carbon disulfide, andthe water-soluble ternary polymer molecular brush anionic dye capture settling agent is used for treating dye wastewater or artistic coating wastewater discharged during dye synthesis or dyeing and finishing processes. The capture settling agent provided by the invention has the advantages that the capturing capacity is good, the sedimentation speed is high, complex heavy metal ions can be treated, anionic dye and complexing heavy metal ions can be captured within a plurality of seconds, large aggregate precipitates can be rapidly grown within 10 seconds, and therefore rapid dye separation can be realized.

The invention relates to a novel cationic dye flocculant as well as a preparation method and application thereof. The novel cationic dye flocculant is characterized by being prepared from polymer mainchain polyhydroxymethyl acrylamide, anionic polymer side chain precursor polymer terminated carboxyl-containing poly(tert-butyl methacrylate), functional polymer side chain precursor polymer terminated carboxyl-containing poly-N-vinyl amino formamide, dimethyl formamide, a catalyst, i.e., N-hydroxysuccinimide, [3-[(ethylimidocarbonyl)amino]propyl] trimethylammonium iodide, cyclohexanediamine tetraacetic acid dianhydride and potassium hydroxide; the novel cationic dye flocculant is used for treating dye waste water and artistic coating waste water which are discharged in a synthesis process ora dyeing and finishing process of dyes. The novel cationic dye flocculant is high in trapping capability and rapid in settling velocity, is capable of trapping cationic dye molecules and complex heavy metal ions within a few seconds, and can rapidly grow into large sedimentation particles, thus achieving the aim of separating the dyes; effluent is basically colorless; simple and convenient operation, low treatment cost and high adaptability are achieved.

The invention relates to an ultra-fast sedimentation type molecular brush structure heavy metal scavenger and a preparation method and application thereof. The ultra-fast sedimentation type molecularbrush structure heavy metal scavenger is characterized by being prepared from poly hydroxyethyl acrylamide as a polymer main chain, poly N-vinylformamide as a functional polymer side chain precursor polymer with a terminal end containing a carboxyl group, water, N-hydroxysuccinimide as a catalyst, 1-ethyl-3-(3-dimethylaminopropyl)carbodiimide iodomethane salt, potassium hydroxide, 1,2-cyclohexanediaminetetraacetic dianhydride and carbon disulfide, and can be used to treat wastewater produced by electroplating, smelting, mining, beneficiation, chemical, mechanical and other industries. A new chelating functional group can adsorb complexing heavy metal ions. Each basic unit can provide a hexacoordinate atom for strong chelation and adsorption, by chemical precipitation reaction of sodium dithiocarbamate of a sedimentation aid side chain and a sedimentation aid agent, large aggregates can be formed in a few seconds, rapid settling can be achieved, and the ultra-fast sedimentation type molecular brush structure heavy metal scavenger has efficient trapping and settling properties.

A method for preparing an antibacterial coating for a cable board in a clean area, comprising the following steps: (1) adding a silver-loaded calcium phosphate antibacterial agent to a modified solution, heating the modified solution to 65-70°C, and then heat preservation treatment After 60‑70min, cool to room temperature, obtain a precipitate after centrifugation, and dry the precipitate to obtain a modified silver-loaded calcium phosphate antibacterial agent; (2) water-based hydroxyacrylic acid emulsion, modified silver-loaded calcium phosphate antibacterial agent, 1 , After 2-cyclohexanediaminetetraacetic acid, tetrapolyethylene glycol monooctyl ether, dicyandiamide, and polycaprolactam powder are mixed evenly, an antibacterial coating for a clean area cardboard is prepared. The preparation method of the antibacterial coating for the cable board in the clean area provided by the present invention is simple in operation and low in cost. The prepared antibacterial coating has a high bactericidal rate, and has excellent adhesion on the surface of the cable board, and is not easy to fall off. Phenomenon.