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40 results about "EDDS" patented technology

Ethylenediamine-N,N'-disuccinic acid (EDDS) is an aminopolycarboxylic acid. It is a colourless solid that is used as chelating agent that may offer a biodegradable alternative to EDTA, which is currently used on a large scale in numerous applications.

Leaching agent for repairing heavy metal cuprum polluted soil and method thereof

The invention discloses an eluent for the remediation of metal Cu contaminated soil and a leaching method, pertaining to the field of soil environment remediation. The eluent for the remediation of metal Cu contaminated soil comprises the ethylenediaminedisuccinic acid EDDS and ethyl lactate with the wt proportion by 1: 1-25. The remediation method is that the content of metal Cu in the contaminated soil is tested primarily; the metal Cu contaminated soil is put into a leaching column; the EDDS and ethyl are mixed to form a eluent, and an eluent is prepared with the proportion between eluent and soil weight by 1-50:1; (4) the prepared eluent is leached from top to bottom into the column, the leachate is collected from the bottom of the column. The EDDS of the invention has wide source and is obtained with low cost; the EDDS consumption is reduced, and the remediation cost is lowered; both the ethyl lactate and EDDS can be bio-degenerated, thereby reducing the environmental risk after leaching remediation.
Owner:NANJING UNIV

Method for continuously remediating soil cadmium contamination by using chelating agent EDDS and ramie

The invention belongs to the technical field of remediation of soil contamination, and particularly relates to a method for continuously remediating soil cadmium contamination by using a chelating agent EDDS and ramie. The method comprises the following steps: after ramie survives, applying the biodegradable chelating agent EDDS to the soil, wherein the application amount of the chelating agent is 75-300kg / mu; irrigating the ramie every 30 days by using an 0.005-0.015mol / L EDDS solution, and normally irrigating the ramie in the rest of time; and regularly harvesting aboveground stems and leaves of the ramie, and leaving the underground parts of the ramie to further grow. Compared with the prior art, the method disclosed by the invention is better in remediation effect and more environmentally-friendly; and the method is easy to operate, and has certain economic benefits, and therefore, the method has a board promotion prospect.
Owner:NORTHWEST A & F UNIV

Method for restoring lead polluted soil by in-situ strengthening plant

The invention discloses a method for restoring lead polluted soil by in-situ strengthening plants, which comprises the following steps: China asters are replanted on soil with lead pollutants, and acid fertilizers NH4Cl and biodegradable chelating agents EDDS are applied to the soil. The invention uses the combined function of the acid fertilizer NH4Cl and the biodegradable chelating agent EDDS to strengthen and increase the total quantity of enriched lead of the overground parts of the China asters, and the China asters of the overground parts are harvested to treat the lead polluted soil. The method has high restoring efficiency and strong operability, furthest reduces environmental risks and human health hazards, and the like.
Owner:LIAONING UNIVERSITY OF PETROLEUM AND CHEMICAL TECHNOLOGY

Enhancement of metal molluscicides by ethylene diamine disuccinic acid

An ingestible mollusc poison contains a simple metal compound, an activity enhancing additive such as ethylene diamine disuccinic acid (EDDS) and derivatives thereof, and a carrier material edible to molluscs. In one embodiment the active agent of the mollusc poison may be in the form of a metal complex of EDDS. The composition may be used alone or in conjunction with molluscicidal co-active agents and / or fertilizers.
Owner:W NEUDORFF

Cadmium-polluted soil restoration method

The invention provides a method for repairing cadmium-contaminated soil, comprising: planting Achyranthes chrysanthemum in the cadmium-contaminated soil, and spraying 1-2 mmol / kg EDDS into the soil after the chrysanthemum is grown to the initial flowering stage, and the chrysanthemum continues to grow After the full flowering period, harvest the aerial part of Achyranthes chrysanthemum. The present invention applies EDDS to the soil after the initial flowering stage of Achyranthes chrysanthemum, which can enhance the absorption and transfer of cadmium in the soil by Achyranthes chrysanthemum, thereby effectively removing the heavy metal cadmium in the soil and realizing the restoration of the soil, and the restoration efficiency is higher than that of cattle. Chrysanthemum chrysanthemum alone and chrysanthemum combined with EDTA will not cause toxicity to chrysanthemum. At the same time, the method provided by the invention has a shorter restoration time and can remove the heavy metal cadmium in the soil in a short time. In addition, the method provided by the invention will not cause EDDS to remain in the soil, and will not form secondary pollution.
Owner:SICHUAN AGRI UNIV

Application of biodegradable chelating agent EDDS (Ethylenediaminedisuccinic Acid) to treatment on non-degradable organic wastewater

The invention provides an application of a biodegradable chelating agent EDDS (Ethylenediaminedisuccinic Acid) to treatment on non-degradable organic wastewater. The application concretely comprises the steps of adding the biodegradable chelating agent EDDS and ferrous salt into the non-degradable organic wastewater, adjusting the pH value to be smaller than 7, and then, adding hydrogen peroxide to react. According to the invention, the biodegradable chelating agent EDDS is used for improving a Fenton / Fenton-like oxidization method to treat the non-degradable organic wastewater and can be used for controlling the degradation rate of hydrogen peroxide and simultaneously complexing Fe<2+> and Fe<3+>, so that the utilization ratio of hydrogen peroxide is greatly increased, the consumption of ferrous salt is reduced, the application range of the Fenton / Fenton-like oxidization method in water treatment is widened, and the sewage treatment effect of the Fenton / Fenton-like oxidization method is greatly enhanced.
Owner:HOHAI UNIV

Novel multi-element ecological chelate fertilizer and making method thereof

The invention discloses a novel multi-element ecological chelate fertilizer and a making method thereof. The fertilizer comprises urea, ammonium sulfate, monoammonium phosphate, potassium sulfate, potassium nitrate, anhydrous magnesium sulfate, nitrate tetrahydrate, 0.6-1.2 parts of zinc sulfate heptahydrate, ferrous sulfate heptahydrate, copper sulfate pentahydrate, boric acid, a synergistic chelating agent (citric acid+ammonia water+glycolic acid) and a biodegradable chelating agent trisodium ethylenediamine disuccinate. Through appropriate compatibility of the synergistic chelating agent and EDDS (ethylenediaminedisuccinic acid), the compound chelating agent is biodegradable, the chelating properties are significantly improved, trace elements in the fertilizer are subjected to two chelating reactions to form a water-soluble reticular chelate, and then the water-soluble reticular chelate and macroelements nitrogen, phosphorus and potassium are subjected to granulation, thus obtaining the product. The product has the advantages of wide pH application range, good water solubility, balanced nutrients and easy absorption, avoids nutrient deficiency symptom caused by antagonism between nutrient elements, increases crop yield, improves the quality of agricultural products, and enhances the fertilizer utilization rate by 10-15%.
Owner:辽宁津大肥业有限公司

Synergistic silica scale control

A method for controlling colloidal / amorphous silica scale deposition in an aqueous system is described, which comprises adding to the aqueous system an effective amount of a synergistic combination comprising: A) 10% to 90% by weight of at least one carboxylate polymer comprising units derived from one or more carboxylate monomers; and B) 90% to 10% by weight of at least one chelating agent, based on the total weight of said synergistic combination. The carboxylate polymer may be a homopolymer of (meth)acrylic acid, maleic acid, itaconic acid, or their salts, or a copolymer of one or more monomers selected from meth)acrylic acid, maleic acid, itaconic acid, and their salts and, optionally, one or more sulfonic-free ethylenically unsaturated monomers. The chelating agent may be one or more of: methylamine, ethanolamine methylethanolamine (MEA), ethylenediamine (EDA), diethylenetriamine (DETA), ethylenediamine tetraacetic acid (EDTA), ethylenediamine disuccinic acid (EDDS), iminodiaacetic acid (IDA), tetrasodium ethylene diaminetetraacetic acid, and derivatives thereof, among others.
Owner:DOW GLOBAL TECH LLC +1

Synergistic silica scale control

A method for controlling colloidal / amorphous silica scale deposition in an aqueous system is described, which comprises adding to the aqueous system an effective amount of a synergistic combination comprising: A) 10% to 90% by weight of at least one carboxylate polymer comprising units derived from one or more carboxylate monomers; and B) 90% to 10% by weight of at least one chelating agent, based on the total weight of said synergistic combination. The carboxylate polymer may be a homopolymer of (meth)acrylic acid, maleic acid, itaconic acid, or their salts, or a copolymer of one or more monomers selected from meth)acrylic acid, maleic acid, itaconic acid, and their salts and, optionally, one or more sulfonic-free ethylenically unsaturated monomers. The chelating agent may be one or more of: methylamine, ethanolamine methylethanolamine (MEA), ethylenediamine (EDA), diethylenetriamine (DETA), ethylenediamine tetraacetic acid (EDTA), ethylenediamine disuccinic acid (EDDS), iminodiaacetic acid (IDA), tetrasodium ethylene diaminetetraacetic acid, and derivatives thereof, among others.
Owner:DOW GLOBAL TECH LLC +1

Compositions suitable for treatment of hair comprisng chelants and methods for reducing oxidative hair damage

The present invention relates to hair care compositions comprising an oxidizing agent and chelants having ratio calculated at pH 10 of at least 3.20 wherein log KCuL is the common logarithm of the Conditional Stability Constant of said chelant with Cu<2+> and log KCaL is the common logarithm of the Conditional Stability Constant of said chelant with Ca<2+>. Suitable chelants are diamine-N,N'-dipolyacids or monoamine monoamide-N,N'-dipolyacids. The compositions according to the present invention contribute to reducing the oxidative damage sustained by a keratinous fiber such as hair during bleaching, dyeing, perming or other oxidative treatments. Especially preferred diamine dipolyacid is ethylenediamine-N,N'-disuccinic acid (EDDS).
Owner:WELLA OPERATIONS US LLC

EDDS (ethylenediaminedisuccinic acid) modified engineering material and preparation method thereof

The invention provides an EDDS (ethylenediaminedisuccinic acid) modified engineering material. The EDDS modified engineering material is prepared by adopting a modifier EDDS and an adsorbent engineering material through physical bonding and chemical bonding. The invention also provides a preparation method of the EDDS modified engineering material. The EDDS modified engineering material is simple in preparation technology and low in cost. The EDDS modified engineering material is modified by using a biodegradable chelating agent EDDS. The obtained EDDS modified engineering material has good stability on the one hand and good metal ion adsorption property on the other hand.
Owner:HOHAI UNIV

Environment-friendly three-element catalytic detergent

The invention relates to an environment-friendly three-element catalytic detergent. The detergent is at least prepared from the following components by weight percent: 0.5 to 0.8 percent of hydrochloric acid, 10 to 20 percent of EDDS, 6 to 15 percent of cleaning agent, 5 to 10 percent of scale and corrosion inhibitor, 5 percent of co-solvent and deionized water, wherein the sum of the weight percent of the hydrochloric acid, the EDDS, the cleaning agent, the scale and corrosion inhibitor, the co-solvent and the deionized water is 100 percent. The three-element catalytic detergent disclosed by the invention can primarily clean an engine which is completely blocked and cannot be started at normal temperature to remove the sulfur and phosphorus complex and accumulated carbon deposit, so that the engine can be started, then the engine is started to be secondarily cleaned at an idle speed at high temperature so as to regenerate a precious metal catalyst, and an effect for thoroughly and effectively cleaning a three-element catalytic converter is achieved; and moreover, components used in the three-element catalytic detergent are good in biodegradability, and the three-element catalytic detergent is an environment-friendly three-element catalytic detergent.
Owner:北京雅士科莱恩石油化工有限公司

Photochemical reduction repairing method for soil polluted by hexavalent chromium

InactiveCN103316906ARealize separation and removalAvoid simple conversionContaminated soil reclamationChromium contaminationIron salts
The invention provides a photochemistry reduction repairing method for soil polluted by hexavalent chromium. The method has the advantages that operation is simple, chromium can be directly removed from polluted soil, and secondary pollution is avoided. The technology scheme of the method comprises following steps: (1) soil polluted by hexavalent chromium is dip rinsed by a [S,S]-EDDS eluent; (2) the soil processed by the step (1) is filtered, and after solid-liquid separation, iron salt and multi-carboxylate are added into the eluent; (3) hexavalent chromium is subjected to a photochemical reduction reaction in the presence of light. The photochemical reduction repairing method for soil polluted by hexavalent chromium has the advantages that operation is simple, cost is low, hexavalent chromium in polluted soil can be high-effectively separated and degraded, and secondary pollution is avoided.
Owner:WUHAN UNIV

Compound eluting agent for repair of arsenic contaminated soil and use method and application thereof

The invention belongs to the field of repair of heavy metal contaminated soil, and in particular, relates to a compound eluting agent for repair of arsenic contaminated soil and a use method and an application thereof. Ethylenediaminedisuccinic acid trisodium salt (EDDS) and oxalic acid are effectively proportioned and combined to form the compound eluting agent, eluting process parameters are optimized, arsenic in the contaminated soil can be efficiently removed, the eluting technological process is simple and easy to operate, the harm of the arsenic contaminated soil after repair is greatly reduced, and secondary pollution cannot be caused.
Owner:INST OF ENVIRONMENT & SUSTAINABLE DEV IN AGRI CHINESE ACADEMY OF AGRI SCI

Compositions suitable for treatment of hair comprisng chelants and methods for reducing oxidative hair damage

The present invention relates to hair care compositions comprising an oxidizing agent and chelants having ratio calculated at pH 10 of at least 3.20 wherein log KCuL is the common logarithm of the Conditional Stability Constant of said chelant with Cu<2+> and log KCaL is the common logarithm of the Conditional Stability Constant of said chelant with Ca<2+>. Suitable chelants are diamine-N,N'-dipolyacids or monoamine monoamide-N,N'-dipolyacids. The compositions according to the present invention contribute to reducing the oxidative damage sustained by a keratinous fiber such as hair during bleaching, dyeing, perming or other oxidative treatments. Especially preferred diamine dipolyacid is ethylenediamine-N,N'-disuccinic acid (EDDS).
Owner:WELLA OPERATIONS US LLC

Dishwasher detergent

A phosphate-free automatic dishwashing agent is described comprising from 0.05 to 20 wt. % amphoteric polymer and from 2 to 40 wt. % ethylene diamine disuccinic acid. The novel combination of amphoteric polymer with ethylene diamine disuccinic acid (EDDS) results in excellent performance compared to traditional phosphate-free automatic dishwashing agents, especially with regard to good cleaning, clear rinsing, and the overall inhibition of deposits.
Owner:HENKEL KGAA

Coating compositions having chelant functionality

The present invention provides a floor coating composition comprising (A) and aqueous solvent; and (B) a chelating polymer which comprises units derived from one or more aminocarboxylate compounds or their salts, one or more other polymerizable monomers, one or more ethylenically unsaturated monomers and, optionally, one or more crosslinking monomers. For example, the aminocarboxylate compounds or their salts may be one or more of iminodiacetic acid (IDA), iminodisuccinic acid (IDS), ethylenediamine triacetic acid (ED3A) and ethylenediamine disuccinic acid (EDDS), or their salts. Suitable polymerizable monomers may be one or more of glycidyl methacrylate (GMA), allyl glycidyl ether (AGE), vinylbenzyl chloride (VBC), allyl bromide, and their derivatives.
Owner:ROHM & HAAS CO

Oral care composition

The invention discloses an oral care composition, which is composed of a chelating agent and an antibacterial agent. The chelating agent does not contain phosphorus, the 28-day biodegradation rate isgreater than 60%, and the calcium ion binding rate (pH is 5.5-10, 25 DEG C) is greater than 700mg / g; the iron ion binding rate (pH is 5.5-10, 100 DEG C) is greater than 700mg / g; wherein the chelatingagent is selected from one or more of citrate, L-GLDA, MGDA, IDS and EDDS, and preferably L-GLDA. The antibacterial agent does not contain chlorine and benzene, the 28-day biodegradation rate is larger than 90%, the minimum antibacterial concentration is achieved, and candida albicans (smaller than 50 ppm), streptococcus mutans (smaller than 50 ppm), porphyromonas gingivalis (smaller than 30 ppm)and fusobacterium nucleatum (smaller than 100 ppm) are included; wherein the antibacterial agent is selected from one or more of 1, 2-pentanediol, 1, 2-hexanediol, 1, 2-octanediol and 1, 2-decanediol,and preferably, the antibacterial agent is compounded according to a certain proportion. The chelating agent and the antibacterial agent are environmentally friendly and are compounded according to acertain proportion, the minimum inhibitory concentration of the antibacterial agent can be reduced, and meanwhile the effect of removing exogenous stains is achieved.
Owner:LAFANG CHINA CO LTD

Magnetic soil remediation agent for heavy metal pollution of soil as well as preparation method and application of magnetic soil remediation agent

The invention discloses a magnetic soil remediation agent for soil heavy metal pollution and a preparation method and application thereof. The magnetic soil remediation agent is prepared by taking remediation agent aggregate and a magnetic material core body as raw materials and taking a heavy metal collecting agent as a modifier; wherein the repairing agent aggregate is silicon dioxide activated by strong base; the magnetic material core body is prepared from magnetic materials of Fe3O4 and gamma-Fe2O3; and the modifier is prepared from ethylene diamine tetraacetic acid (EDTA), nitrilotriacetic acid trisodium salt (NTA), (S,S)-ethylene diamine-N,N-disuccinic acid trisodium salt (EDDS) and mercaptoethylamine. The remediation agent can effectively passivate heavy metals in soil, reduce the effective state content of the heavy metals and inhibit the absorption of plants to the heavy metals.
Owner:SOUTH CHINA NORMAL UNIVERSITY

Preparation method and application of EDDS lyase immobilized enzymes

The invention relates to a preparation method and application of EDDS lyase immobilized enzymes, and belongs to the technical field of biology. In order to solve existing problems of being poor in purity and low in conversion rate, the invention provides a preparation method of the EDDS lyase immobilized enzymes. The method comprises the steps of performing fermentation and coarse extraction on EDDS lyase genetic engineering bacteria having His-tag to obtain EDDS lyase coarse enzyme liquid; enabling the coarse enzyme liquid to be in contact with a metal compatible carrier, enabling EDDS lyaseto be adsorbed onto the metal compatible carrier, and performing purification; eluting the EDDS lyase on the metal compatible carrier to obtain purified enzyme liquid; and immobilizing the enzyme liquid and the immobilized carrier to obtain EDDS lyase immobilized enzymes having His-tag for synthetizing (S,S)-EDDS by using fumaric acid and ethylenediamine as substrates. According to the preparationmethod disclosed by the invention, fumarase in the enzyme liquid can be effectively removed, the efficient purification effect can be achieved, and the preparation method has efficient enzyme activity capacity and high reutilization rate.
Owner:TAIZHOU UNIV +1

Edds chelated nanoceria with catalase-like activity

A process for making nanoparticles of biocompatible materials is described, wherein an aqueous reaction mixture comprising cerous ion, ethylenediaminedisuccinic acid, an oxidant, water, and optionally citric acid, is provided along with temperature conditions to directly form within the reaction mixture, a stable dispersion of cerium oxide nanoparticles. Biocompatible, nanoparticles comprised of cerium oxide, ethylenediaminedisuccinic acid, and optionally citric acid, are described. An increase in catalase-like enzyme activity is demonstrated by cerium oxide nanoparticles prepared with citric acid and ethylenediaminedisuccinic acid.
Owner:CERION

Method of inhibiting copper deposition on hair

A method of inhibiting copper deposition on hair and facilitating the removal of copper deposited on hair including applying to the hair a shampoo composition having ethylenediamine-N,N′-disuccinic acid (EDDS) and / or histidine, rinsing the shampoo composition from the hair, applying to the hair a conditioner composition comprising histidine, rinsing the conditioner composition from the hair, and applying to the hair a leave-on treatment comprising ethylenediamine-N,N′-disuccinic acid (EDDS).
Owner:PROCTER & GAMBLE CO

Pretreatment process for aluminum and high etch cleaner used therein

Disclosed is a high etch cleaner for aluminum and aluminum alloy substrates that leads to enhanced corrosion protective performance of a variety of anti-corrosion pretreatments. The cleaner comprises very low levels of silicate of from 0 to 250 ppm, 50 to 500 ppm of at least one chelator selected from EDTA or its salts, NTA or its salts, DTPA or its salts, iminodisuccinic acid or its salts, EDDS or its salts, tartaric acid or its salts, or a mixture thereof, and has a high pH of from 11.0 to 13.5. Preferably the cleaner is used to etch from 0.5 to 4.0 grams per meter squared from the substrates.; Substrates treated with the cleaner and then coated with a variety of anti-corrosion pretreatments and outer coatings show enhanced corrosion resistance compared to substrates cleaned with standard cleaners that have low etch rates, high silicate levels and no chelating agents followed by anti-corrosion pretreatments and outer coatings.
Owner:HENKEL KGAA

EDDS chelated nanoceria with catalase-like activity

A process for making nanoparticles of biocompatible materials is described, wherein an aqueous reaction mixture comprising cerous ion, ethylenediaminedisuccinic acid, an oxidant, water, and optionally citric acid, is provided along with temperature conditions to directly form within the reaction mixture, a stable dispersion of cerium oxide nanoparticles. Biocompatible, nanoparticles comprised of cerium oxide, ethylenediaminedisuccinic acid, and optionally citric acid, are described. An increase in catalase-like enzyme activity is demonstrated by cerium oxide nanoparticles prepared with citric acid and ethylenediaminedisuccinic acid.
Owner:CERLON ENTERPRISES LLC

Detergent composition comprising an inverse latex combining edds as sequestrant and a polyelectrolyte comprising amps and acrylamide

Detergent composition (F) for domestic or industrial use including, as thickener, a self-invertible inverse latex including an aqueous phase including: a) a crosslinked anionic polyelectrolyte (P) consisting of: —at least one monomer unit derived from 2-methyl-2-[(1-oxo-2-propenyl)amino]-1-propanesulfonic acid in free acid form or partially or totally salified form; —at least one monomer unit derived from at least one monomer chosen from the elements of the group consisting of acrylamide, N,N-dimethylacrylamide, ethacrylamide, N-isopropylacrylamide, N-tert-butylacrylamide; and —at least one monomer unit derived from a polyethylenic crosslinking monomer (AR), b) ethylenediaminedisuccinic acid in trisodium salt form.
Owner:SOC DEXPLOITATION DE PROD POUR LES IND CHEM SEPPIC
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