40 results about "Iminodisuccinate" patented technology

It has been discovered that biodegradable and non-toxic chelant compositions can perform multiple beneficial functions in an aqueous fracturing fluid through the chelation of ions. Some of the multiple functions include various combinations of the following: demulsifier, demulsifier enhancer, scale inhibitor, crosslink delay agent, crosslinked gel stabilizer, enzyme breaker stabilizer, and the like. Some of the chelants used in the compositions include, but are not necessarily limited to, sodium polyaspartate; sodium iminodisuccinate; disodium hydroxyethyleneiminodiacetate (Na₂HEIDA); sodium gluconate; sodium glucoheptonate; sugar alcohols; monosaccharides; disaccharides; and mixtures thereof.

An odor absorbing composition is provided comprising zinc salt of ricinoleic acid, a solubility promoter including sodium iminodisuccinate, water and optionally, other ingredients such as perfumes and antifungal agents or bactericides. The zinc ricinoleate can be completely solubilized in water, yet the solution will exhibit low foaming and friability. In addition, the end product may be in the form of a sprayable liquid, a thick liquid capable of clinging to a vertical surface, a gel or solid tablet, a powder, or any other form. The present invention further relates to a method for forming an odor absorbing composition comprising zinc salt of ricinoleate acid, sodium iminodisuccinate and water.

The invention provides a alkyl-iminodisuccinate chelating surfactant, wherein in the structural formula, R represents paraffin base, and Y represents H, Na, K, or NH4. The method comprises coupling ahydrophobic long carbon chain onto an N atom of iminodisuccinate, thereby making the whole molecule has lipophilicity as well as hydrophilicity. Alkyl-iminodisuccinate is a novel surfactant, and simultaneously has excellent surface activity and chelating capability.

The electrolyte composition is used in a method of depositing metals, in particular, onto substrates, especially solar cells. The electrolyte composition is particularly suitable for the deposition of metals, in particular silver, onto solar cells. The electrolyte composition is preferably free of cyanides and contains at least one metal, preferably silver, and an iminodisuccinate derivative, preferably a sodium or postassium iminodisuccinate.

The invention discloses a fluorine removal agent for water treatment. The fluorine removal agent comprises the following raw materials: calcium salt, polymeric aluminum salt, polymeric ferric salt, magnesium salt, copper salt, sodium iminodisuccinate, and the like. According to the invention, formula composition and dosage are screened, so that the fluorine removal agent has the advantages of various compound raw materials at the aspect of fluorine removal and is capable of eliminating defects of all the raw materials at the aspect of defluorination; defluorination effect and drug performanceof the acquired fluorine removal agent are both obviously improved; the fluorine removal agent has high selectivity and removal rate for fluorine ions in wastewater; the fluorine removal agent can beused for extensive fluoride-containing wastewater; after treatment, water is quickly and stably discharged and is free from secondary pollution; the fluorine removal agent product has the advantages of drug performance stability and convenience in use and has a bright market prospect in industrial wastewater defluorination. Besides, the fluorine removal agent provided by the invention is simple inpreparation method, is safe and stable in technology, is convenient for mass production and has obvious economic benefit.

The invention discloses a synthesis technology of a chelating agent-tetrasodium iminodisuccinate. The tetrasodium iminodisuccinate is obtained through atmospheric production of fumaric acid, ammonium bicarbonate and sodium hydroxide as raw materials. The preparation method is simple, convenient, low in cost and stable in effect; the obtained etrasodium iminodisuccinate is good in quality and high in purity, does not contain toxic substances such as fumaric acid, can be directly mixed with various fertilizers and is used as a fertilizer enhancing chelating agent.

The invention relates to a method for improving conversion rate in production of iminodisuccinate, and belongs to the technical field of organic compound production. Higher conversion rate is obtainedthrough high pH value, lower temperature and prolonged reaction time under high concentration. The method is high in conversion rate, and the conversion rate detected by a complex copper developing method is generally not lower than 85%; the content of by-products is low, and the content of fumaric acid is reduced to 5% or below from 7% (in pure solid) of a common process.

The invention provides a detergent for yellow spots on the outer surface of a railway vehicle and a preparation method and application of the detergent. The detergent for the yellow spots on the outersurface of the railway vehicle consists of the following components in percentage by mass: 12-18.5% of a compounded surfactant, 15-20% of a chelating agent, 8-14% of a solubilizer, 5-8% of a builderand the balance of water, wherein the compounded surfactant consists of an anionic surfactant and a nonionic surfactant in a mass ratio of 1:(2-4); the chelating agent is selected from one or two of ethylenediamine tetraacetic acid tetrasodium salt and sodium iminodisuccinate in any ratio; the solubilizer is one or two of N,N-dimethyldecanamide and sodium isopropyl benzoate in any ratio; and the builder is selected from one or two of ethanol amine and potassium carbonate in any ratio. The detergent provided by the invention is good in dirt removing power, and particularly has a good removing capability for yellow spots on railway vehicles.

The invention relates to the technical field of desulfurization, and particularly discloses a complex iron desulfurizer as well as a preparation method and application thereof. The complex iron desulfurizer comprises, by weight, 0.4 to 1 part of a soluble iron salt, 2 to 10 parts of iminodisuccinate, 2 to 10 parts of polyaspartate, 10 to 15 parts of a hydrogen sulfide absorbent, 1 to 5 parts of a corrosion inhibitor and 900 to 1100 parts of water. The preparation method of the complex iron desulfurizer comprises the following steps: adding the soluble iron salt into water for dissolving according to the weight part ratio, then sequentially adding the iminodisuccinate, the polyaspartate, the corrosion inhibitor and the hydrogen sulfide absorbent, and adjusting the pH value to 8-9 to obtain the complex iron desulfurizer. The complex iron desulfurizer provided by the invention has the advantages of high sulfur capacity, low secondary salt generation amount and no temperature influence, and the generated sulfur particles have the advantages of high purity, large particle size and easiness in separation, and have relatively high application value.

The invention discloses degradable multinuclear chelated fertilizer. The fertilizer includes 30-70 parts of iminodisuccinate, 5-20 parts of citric acid, 1-10 parts of sugar alcohols, 10-50 parts of medium and trace element salts, and 1-5 parts of an acid-base regulator. The degradable multinuclear chelated fertilizer of the invention forms a multinuclear ligand by combining the iminodisuccinate, the citric acid and the suger alcohols, which improves the stability of a chelating system, minimizes the existence of excess metal ions, improves the utilization of medium and trace elements, effectively improves the surface tension of a fertilizer solution after foliar fertilizer application of the chelated fertilizer, enhances the adsorption of the chelated fertilizer on leaf surfaces of crops,and prolongs the absorption time of the fertilizer on the leaf surfaces. Moreover, all the components can be completely metabolized and absorbed by plants, can be degraded by soil microorganisms and has the advantages of good safety and no environmental residues.

The invention discloses a long-acting whitening detergent with an efficient chelating capability and a preparing method thereof. The long-acting whitening detergent is prepared from, by weight, 8-10 parts of soap powder, 8-12 parts of alkali, 12-20 parts of tetrasodium glutamate diacetate, 15-20 parts of methyl glycine diacetic acid, 8-15 parts of sodium iminodisuccinate, 15-20 parts of hydroxyethylidene diphosphonic acid, 6-10 parts of ethylene diamine tetraacetic acid tetrasodium and 7-12 parts of a maleic acid-acrylic copolymer. The long-acting whitening detergent is wide in source of raw materials and simple in preparing technology; by cooperatively using different raw materials, the prepared finished product has a strong chelating capability and a wide using prospect.

The invention discloses a method for measuring the content of iminodisuccinate in compound urea, and belongs to the technical field of chemical analysis. The method comprises the following steps: measuring total absorbance value S (compound) of a compound urea solution under the wavelength of 240-280, an absorbance value S (urea) and S (pigment) of urea and pigment in the compound urea solution and an absorbance value S (blank) of blank control at first, wherein the absorbance value S (iminodisuccinate) of the iminodisuccinate equals to S (compound)-S (urea)-S (pigment)-S (blank); and then acquiring the content of the iminodisuccinate in the compound urea solution according to a standard curve of an iminodisuccinate solution under the wavelength of 240-280 nm. By the method, influence to the iminodisuccinate in a pigment and urea measuring process sis eliminated effectively, and the problem that the addition amount of the iminodisuccinate in the compound urea is difficultly detected after a finished product is obtained; and in a measuring process, required equipment is less, the cost is low, and measurement steps are simple, rapid and accurate.

The invention provides a preparation method of a ductile substrate material. The preparation method specifically comprises the following steps of drying periostracum cicadae to be at the constant weight and then crushing the periostracum cicadae to obtain periostracum cicadae powder; transferring the periostracum cicadae powder into a mixed solution of sodium iminodisuccinate, potassium persulfateand hydrogen peroxide, carrying out sealing, heating and continuous stirring, filtering a product, and washing filter residues with deionized water to be neutral; transferring the filter residues into an acetic acid solution, carrying out grinding and ultrasonic treatment, carrying out centrifuging to obtain supernate; and diluting the supernate with the deionized water, and evaporating part of the water to prepare hydrogel. The ductile substrate material is prepared by taking the periostracum cicadae as raw materials, performing treatment by a specific physicochemical method to obtain a novel nanoscale and degradable biotechnology substrate material subjected to chemical modification, and then performing a film forming process. The ductile substrate material has the advantages of being environment-friendly, low in cost and the like. A film material prepared from the ductile substrate material shows very good visible light transmittance and ductility, and still has relatively high visible light transmittance, relatively low color changes and relatively small crimpness in a special environment after substrate formation.

The invention relates to the technical field of preparation of scale inhibitors, in particular to a scale inhibitor suitable for an S Zorb gasoline desulfurization device as well as a preparation method and application of the scale inhibitor. Comprising the following raw materials in parts by mass: 12-17 parts of an antioxidant, 7-11 parts of a hydroxylamine polymerization inhibitor, 6-9 parts of polyisobutylene diimine, 7-9 parts of iminodisuccinate, 4-6 parts of a viscosity modifier, 5-8 parts of modified activated carbon, 7-10 parts of ammonium persulfate, 5-7 parts of oil-soluble imidazoline and 53-74 parts of 120 # solvent oil. The scale inhibitor is added into the raw material catalytic gasoline, so that colloid aggregation and olefin condensation reaction in the gasoline can be avoided, the scaling phenomenon of a heat exchanger tube bundle is effectively prevented, meanwhile, the adhesion rate of dirt in subsequent desulfurization operation can be reduced, and peculiar smell in a desulfurization device can be eliminated.

The invention discloses a method for measuring the content of iminodisuccinate (IDS) in a fertilizer, and belongs to the fields of chemical analysis, product detection, standard filing and the like. The method comprises the following steps of firstly, preparing a reference liquid and a liquid to be measured, and performing detecting to obtain the maximum absorption wavelength; and drawing a working curve, and solving the content of the IDS in a to-be-detected sample according to the working curve. A spectrophotometer is taken as a main device and metal ions are taken as an indicator. When theconcentration of the metal ions is fixed, the absorbance of a chelate is increased along with the increase of the IDS fertilizer; at the inflection point position of the absorbance, the metal ions andthe IDS contained in the fertilizer can exactly generate a 1: 1 chelate; and the content of the IDS in the fertilizer is converted according to the amount of the used metal ions. The detection methodis clear in principle, high in repeatability of detection results, less in interference factors, and brings convenience to various manufacturers and third-party mechanisms for detection and application; and in addition, the method can be extended to detect the content of other chelating synergistic agents (such as EDTA, DTPA and the like) in the fertilizer.

The invention discloses an oil and gas well workover working fluid. The working fluid is composed of a brine base liquid, a polymer, an oil-soluble resin, an iminodisuccinate sodium salt and a heat-sensitive auxiliary agent, and a mass content of each component is as follows: 0.5-1% of the polymer, 0.5-1% of the oil-soluble resin, 0.4-0.8% of the iminodisuccinate sodium salt, 0.1-2% of the heat-sensitive auxiliary agent, and the balance the brine base liquid. In the working fluid, by addition of the iminodisuccinate sodium salt, formation of various organic and inorganic precipitates can be prevented; the formed organic or inorganic precipitates and a shielding temporary-plugging layer of a well wall can be removed; and a dissolution corrosion reaction with acid-soluble minerals and cements in reservoir rocks can be produced to enlarge seepage channels. In the working fluid, by addition of the heat-sensitive auxiliary agent, rheological properties of the working fluid can be controlledby temperature regulation.

The invention discloses a conjunctival sac disinfection solution and a using method and device thereof. The conjunctival sac disinfection solution is composed of povidone iodine, sodium iminodisuccinate, potassium iodate, potassium iodide, sodium hydroxide, sodium chloride, potassium chloride, calcium chloride and purified water. When the conjunctival sac disinfection solution is used, the conjunctival sac disinfection solution is directly loaded into a conjunctival sac washing and disinfection device, the conjunctival sac washing and disinfection device is directly operated onto a sterile table by a patrol nurse, and swashing operation is performed by an assistant or an operator in a sterile environment. The conjunctival sac disinfection solution does not need to be prepared and sucked onsite; the solution is prepared by strictly executing sterile operation in an environment meeting requirements; therefore, a sterile product can be formed and can be directly swashed by the assistantor the operator in the sterile environment, the infection risk caused by repeated suction of a rubber plug is reduced, secondary pollution in the self-preparation process is avoided, meanwhile, one device is used for one person, manpower resources and material waste generated in a conventional disinfectant preparation process are saved, and the sterile operation principle is followed.

The invention discloses a chelated metal iminodisuccinate, and belongs to the field of environment-friendly fertilizers. The chelated metal iminodisuccinate is used for supplementing metal trace elements to crops or soil, and comprises a reaction product of iminodisuccinic acid or iminodisuccinate and a metal element-containing raw material, wherein the metal element-containing raw material is oneor a mixture of several of a metal element, oxide, hydroxide, carbonate and basic carbonate. The content and the utilization rate of an active component in a chelated fertilizer can be significantlyincreased; all the contained components can be completely metabolized and absorbed by plants and can also be degraded by soil microorganisms; the chelated metal iminodisuccinate has the advantages ofhigh stability, good safety, no environmental residue and very low ineffective salt component and can effectively avoid soil calcification; packaging, transporting and using costs are reduced.