10 results about "Imidodiacetic acid" patented technology

The application relates to the technical field of lithium ion batteries, and discloses a silicon-carbon nanotube composite material, which is obtained by dehydration of hydroxylated silicon particles, hydroxylated carbon nanotubes and iminodiacetic acid. The silicon-carbon nanotube composite material provided by the application can anchor the silicon particles on the carbon nanotubes through covalent bond action, can increase the uniformity of dispersion of the carbon nanotubes and the silicon particles, can improve the electron transmission capacity, can play a certain counterforce on the volume expansion force of the silicon particles, can reduce the generation of electrode cracks, can further reduce the consumption of electrolyte, and can improve the cycle stability of the whole electrode. Meanwhile, the preparation method provided by the application does not need a complex operation process, has simple process condition requirements, and is suitable for large-scale production.

This invention provides a MoTi film composite etchant composition, relating to the field of metal film etching technology. The composite etchant composition comprises hydrogen peroxide, ammonium hydrogen fluoride, a weak organic acid, a corrosion inhibitor, cis-1,4-cyclohexanedicarboxylic acid, 3-amino-1,2,4-triazole, a complexing agent, iminodiacetic acid, an organic alcohol, and water; and the ratio of ammonium hydrogen fluoride to cis-1,4-cyclohexanedicarboxylic acid is ≥0.2. This invention overcomes the shortcomings of existing technologies, effectively improving the etching efficiency of MoTi films while reducing erosion of adjacent metal layers, achieving precise control of the etching rate, ensuring etching stability, and significantly improving product yield.

The application relates to an iminodiacetic acid type chelating resin and a preparation method and application thereof, and the preparation method comprises the following steps: (1) in the case that the stirring speed is 200-350 r / min, two dispersants are dissolved in water, then ethylbenzene, glycidyl methacrylate, trimethylolpropane trimethacrylate, isooctane and di-t-butyl peroxide are added, the raw materials are reacted after ultrasonic mixing, centrifugal separation is carried out after the reaction is completed, the filter cake is cleaned and dried, and resin microspheres are obtained; (2) in the stirring state, the resin microspheres obtained in the step (1) are added into water, then iminodiacetic acid is added, stirring is continued, then preliminary reaction is carried out by heating, NaOH is further added, reaction is carried out by heating, after the reaction is completed, filtration, cleaning and drying are carried out, and the iminodiacetic acid type chelating resin is obtained. The chelating resin particle size can be controlled, the particle size is relatively large, the specific surface area is large, the adsorption capacity is high, and the chelating resin can be used for adsorbing lead ions in heavy salt matrix.

This invention discloses a method for preparing a retarder for acid fracturing. The retarder is obtained by copolymerizing a nonionic water-soluble monomer, a silicon-containing monomer, an organic acid adsorbent monomer, and a hydrophobic monomer in an anhydrous organic solvent. After the reaction, the resulting product is directly used as an additive in the working fluid without the need for separation and drying. The organic acid adsorbent monomer contains an iminodiacetic acid structure, which chelates with Ca on the surface of carbonate rocks. 2+ Stable adsorption; after hydrolysis, the silicon-containing monomers condense with hydroxyl groups on the rock surface to form chemical bonds, while the condensation and cross-linking between silicon and hydroxyl groups construct a multi-layer network structure; the hydrophobic monomer is an allyl polyoxyethylene alkyl ether, which forms a hydrophobic barrier on the adsorption film surface through hydrophobic association. The resulting retarder, through the synergistic effect of four mechanisms—chelation adsorption, chemical bonding, multi-layer film formation, and hydrophobic shielding—can reduce the acid rock reaction rate by more than 90% at 150°C and in 20% hydrochloric acid, making it suitable for high-temperature carbonate rock acid fracturing operations.

The invention relates to the technical field of lithium recovery, in particular to imine diacetic acid-based chelate resin as well as a preparation method and application thereof. The imino diacetic acid chelate resin realizes separation of the imino diacetic acid chelate resin and the sodium and lithium relying on the function of functional groups and the difference of hydration radiuses of the lithium and the sodium, and the lithium adsorbability is slightly higher than that of the sodium. When the resin is saturated by adsorption, a hydrochloric acid solution slowly passes through the resin column, the hydrochloric acid solution can replace lithium ions and sodium ions adsorbed on the resin, but due to the fact that the resin has different selectivity on the lithium ions and the sodium ions, the sodium ions can be analyzed more quickly than the lithium ions with higher selectivity, and a better lithium-sodium separation effect is achieved.

This invention discloses a radiation-shielding flexible material and its preparation method, relating to the field of radiation-shielding flexible material technology. In preparing the radiation-shielding flexible material, the invention involves treating a protective powder with γ-chloropropyltriethoxysilane to obtain a pre-modified protective powder; reacting the pre-modified protective powder with a composite antibacterial agent to obtain a modified protective powder; reacting phenylphosphoyl dichloride sequentially with diethyl iminodiacetic acid, ethylenediamine, and benzothiazole-2-carboxaldehyde to obtain a phosphorus-nitrogen-sulfur flame retardant; mixing the modified protective powder, the phosphorus-nitrogen-sulfur flame retardant, and thermoplastic polyurethane, using N,N-dimethylformamide as a dispersant, to prepare a protective slurry; coating the protective slurry onto the surface of a fabric and drying to obtain the radiation-shielding flexible material. The radiation-shielding flexible material prepared by this invention can protect against radiation while also possessing excellent flame-retardant and antibacterial properties.

The invention provides a low-nickel system in-situ complexation electronic-grade iminodiacetic acid refining system, and relates to the technical field of iminodiacetic acid preparation, the refining system integrates in-situ induced complexation, supergravity precipitation and separation, a nanometer gradient screening unit and a developing line cleaning coupling module, a nickel ion solvation layer is stripped through a high-frequency cavitation generator, and a high-purity product is obtained. A nickel complexing precursor is generated through induction of a functionalized filler layer, a horizontal asymmetric rotating drum is used for generating a super-gravity field not lower than 3000g to achieve forced liquid-solid separation, and a multi-layer ceramic composite membrane with the pore diameter gradually decreased from 1 micron to 5 nm is matched with a self-assembled monomolecular membrane to conduct physical interception and chemical adsorption dual refining. The system is assisted by on-line quality monitoring and self-adaptive reflux logic, so that the nickel ion concentration of the produced liquid is stably maintained at an extremely low level of less than or equal to 10ppb, the problems of low reaction activity of nickel in an extremely dilute solution, difficulty in separation of colloidal impurities, precipitation of equipment metal and the like are effectively solved, and a purity guarantee is provided for an advanced semiconductor process.

The invention relates to the field of isopropyl alcohol preparation, and discloses a method for preparing electronic grade isopropyl alcohol, which comprises the following steps: (1) contacting propyl alcohol and hydrogen in the presence of a catalyst, and reacting to obtain an isopropyl alcohol crude product; (2) carrying out de-ionization, dehydration and degranulation on the isopropanol crude product; wherein the mode of the detacher is that the isopropanol crude product is subjected to column chromatography through a chelating resin column, an acidic cation exchange resin column and an alkaline anion exchange resin column; the resin in the chelating resin column is iminodiacetic acid type resin, the resin in the acidic cation exchange resin column is sulfonic acid type cation exchange resin, and the resin in the alkaline anion exchange resin column is quaternary ammonium type anion exchange resin. The method provided by the invention is simple in process and relatively low in energy consumption, and can effectively improve the content of isopropanol in the product and reduce the content of water, zwitterions and particles.

The present application relates to the technical field of scale inhibitor production, in particular to a reverse osmosis membrane scale inhibitor for high-iron and high-aluminum sewage treatment and a preparation method thereof; the scale inhibitor is used to solve the problems of poor scale inhibition performance of the existing scale inhibitor and scale deposition on the surface of the reverse osmosis membrane; firstly, amino butyric acid hydroxamic acid and amino phenyl vinyl-8-hydroxyquinoline are synthesized, and then iminodiacetic acid groups of chelating resin are respectively reacted with amino groups in the amino butyric acid hydroxamic acid and the amino phenyl vinyl-8-hydroxyquinoline to obtain chelating resin modified by hydroxamic acid groups and 8-hydroxyquinolyl groups; the hydroxamic acid groups form stable chelates with iron ions and aluminum ions through six-toothed octahedral complex structures; the 8-hydroxyquinolyl groups form five-membered ring chelates through hydroxyl oxygen and quinoline ring nitrogen atoms, have chelating capacity for aluminum ions and iron ions, inhibit the generation of membrane surface scale and organic deposits, and keep the membrane surface clean.

The utility model discloses a quantitative feeding mechanism for iminodiacetic acid, and belongs to the technical field of iminodiacetic acid production. A quantitative feeding mechanism for iminodiacetic acid comprises a base and a weighing assembly installed on the base, and further comprises a feeding box fixedly installed on the base, a hopper used for feeding is fixedly communicated with the feeding box, and a discharging area is formed at the communication position of the feeding box and the hopper; according to the device disclosed by the utility model, clotted iminodiacetic acid is cut through the rhombic tip and is scattered under the action of centrifugal force, the scattered iminodiacetic acid is accumulated at the inlet of the blanking area, and the accumulated iminodiacetic acid is loosened by the stirring part extending out of the scraping plate, so that the iminodiacetic acid can fall down; compared with the prior art, the device has the advantages that the scattering of iminodiacetic acid clots is effectively realized, the condition that the interior of equipment is blocked due to the clotted iminodiacetic acid is reduced, the production efficiency is further improved, the maintenance cost of the equipment is reduced, and the quantification precision is improved.