57 results about "EDDHA" patented technology

A fertilizer composition for improving stress resistance of land planted pear trees comprises arbuscular mycorrhizal fungi, betaine, salicylic acid, ethylenediamine-N,N'-bis(2-hydroxyphenylacetic acid) ferric-sodium complex (EDDHA-Fe), a chelate zinc fertilizer titanium zinc ethylenediaminetetraacetate, a promoter and fertilizers containing other elements. Contained arbuscular mycorrhizal fungi is capable of substantially improving stress resistance on drought, waterlogging disaster, salt and alkali, high temperature, heavy metal toxicity, toxic organics and the like of pear trees, and promoting absorption of soil mineral nutritional elements by soil. Betaine and salicylic acid are capable of inducing to improve crop resistance on adverse situations such as drought, freeze injury and the like.

The invention provides a cleaning agent for an engine circulating cooling system, and a preparation method and a cleaning method thereof. The cleaning agent for the engine circulating cooling system contains 50-70% of EDDHA-Na, 5-15% of sodium citrate, 3-8% of alkanolamide, 0.5-3% of LAN-826, 0.5-3% of BS-12, 5-10% of triethanolamine, 1-3% of BTA, 5-15% of PBTC and 0-20% of water by weight. The cleaning agent is low-cost, effective, easy to manage, safe to use, simple and convenient to operate, and wide in application range; the cleaning agent has remarkable effects in the aspects, such as maintaining safety of the cooling system, recovering original performance of equipment, prolonging service life of the engine and saving energy. The cleaning agent can be used for cleaning engine circulating cooling water path, and has good corrosion inhibition and corrosion prevention function.

The invention discloses an instant fruit swelling whole-process nutrition formula fertilizer for fruit trees. The instant fruit swelling whole-process nutrition formula fertilizer comprises nitrogen, phosphorus pentoxide, potassium oxide, medium elements and trace elements. The medium elements include calcium, magnesium and sulfur, and the trace elements include boron, zinc, manganese and iron. The instant fruit swelling whole-process nutrition formula fertilizer has the advantages that the types and the quantities of nutrition elements required by growth of the fruit trees are provided according to research results of nutrition diagnosis on the fruit trees, the quantities of the nutrition elements required by the fruit trees in different growth periods are provided according to annual growth and development laws of the fruit trees, the sustained-release time and the controlled-release time of the nutrition elements are provided according to fertilizer application intervals, and full-nutrition formula fertilizer schemes are ultimately reasonably determined; the high-quality amide and nitrate nitrogen, water-soluble phosphate fertilizers and high-quality potash fertilizers are applied, and accordingly nitrogen, phosphorus and potassium nutrition can be provided for the fruit trees; EDTA (ethylene diamine tetraacetic acid) and EDDHA are subjected to complexing with the medium elements and the trace elements such as the zinc, the manganese, the iron, copper, the magnesium and the calcium, high-quality boric acid and the like, accordingly, the full-nutrition formula fertilizer which can meet nutrient requirements can be produced by the aid of processes for manufacturing compound fertilizers, the water solubility of the formula fertilizer can reach 90% at least, the duration of the formula fertilizer is 3-6 months, and the total nutrient content of the formula fertilizer is higher than 45%.

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 provides a method for directly preparing battery-grade lithium carbonate, which comprises the following steps: 1) adding a sodium hydroxide solution into a lithium-containing solution tomake the pH value of the whole solution reach 12 or above, thus removing impurity metal ions in the solution, and filtering the solution to obtain a first refined lithium solution; 2) adding dilute acid into the first refined lithium solution, and adjusting the pH value to be less than or equal to 3 to obtain a second refined lithium solution; 3) adding a chelating agent into the second refined lithium solution, and then adding a sodium hydroxide solution to adjust the pH value of the solution to 6-8 to obtain a third refined lithium solution; and 4) adding a sodium carbonate solution into the third refined lithium solution, heating the third refined lithium solution to form a precipitate, and filtering the solution, and washing and drying the obtained precipitate to obtain the battery-grade lithium carbonate. According to the method, dilute acid is used for reversely adjusting the pH value, then EDDHA-Na is used for complexing metal impurity elements, then NaOH is used for reverselyadjusting the pH value, residual metal impurity elements are well removed, and the purity of lithium carbonate is improved.