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56 results about "TETRASODIUM IMINODISUCCINATE" patented technology

Tetrasodium iminodisuccinate is a chelating agent, forming complexes of moderate stability (10 −16), which includes (as a pentadentate ligand) alkaline earth and polyvalent heavy metal ions with one molecule of water in an octahedral structure.

Electroless tin plating formula for printed circuit board

The invention discloses an electroless tin plating formula for a printed circuit board. The formula comprises the following components with the following concentrations: 10-30g / L of stannous ions, 70-130g / L of thiourea, 30-70g / L of methanesulfonic acid, 30-60g / L of citric acid, 20-50g / L of tetrasodium iminodisuccinate, 10-30g / L of carbohydrazide, 10-50mg / L of interfacial agent, 0.05-0.15g / L of bismuth acetate and 20-40g / L of polyamino polyether methylene phosphonate, wherein the component solutions are uniformly mixed and then prepared into an electroless tin plating solution; and the electroless tin plating solution has the following characteristics: tin is stable in tin deposition rate, bivalent tin is not liable to be oxidized into tetravalent tin, and the solution is high in stability. The formula disclosed by the invention contains many complexing agents, the stannous ions are not liable to be oxidized into tetravalent tin, the oxidization of oxygen dissolved in the plating solution can be cancelled by virtue of a reducing agent, the plating solution contains bismuth acetate, a plating layer is a tin-bismuth alloy, and the alloyed plating layer is not liable to grow tin whiskers; and moreover, the electroless tin plating solution has the following characteristics: tin is stable in tin deposition rate, bivalent tin is not liable to be oxidized into tetravalent tin, and the solution is high in stability.
Owner:SHENZHEN CHENGGONG CHEM

Chelating state micronutrient fertilizer with insecticidal function and production method thereof

ActiveCN104098405ALow costNo pest resistanceFertilizer mixturesNematodeEUPATORIUM Extract
The chelating state micronutrient fertilizer with the insecticidal function comprises trace elements and chelating agents and also comprises botanical pesticides and dispersion agents; the chelating state micronutrient fertilizer is shaped like powder; chelating agents are selected from tetrasodium iminodisuccinate salt and or EDTA (Ethylene Diamine Tetraacetic Acid); the botanical pesticides comprise Cynanchum komarovii Al. extracts and also comprise Stellera chamaejasme extracts and Ageratina adenophora extracts. According to the chelating state micronutrient fertilizer with the insecticidal function, the trace elements are added, trace elements and other nutrients brought by a plant source which serves as the pesticides are contained, the trace elements and the other nutrients can be chelated into the chelating state micronutrient fertilizer, the botanical pesticides are also contained, and accordingly the formula is reasonable, the synergistic effect is obvious, the utilization rate of effective components is high, the pest killing effect is good through due to the double insecticidal mechanism for damaging protective enzyme systems and nervous systems of nematodes and the fumigation action of multiple ingredients, and the botanical pesticides are free of pest resistance. The invention also relates to a production method of the chelating state micronutrient fertilizer with the insecticidal function.
Owner:GUILIN JINSHENG BIOLOGICAL TECH

RNA extraction kit suitable for normal-temperature transportation, and extraction method

The invention relates to an RNA extraction kit suitable for normal-temperature transportation. The kit comprises a lysis binding solution, and the lysis binding solution contains guanidine isothiocyanate with the concentration of 1 to 5 M, sodium thiocyanate with the concentration of 0.2 to 3 M, trihydroxymethyl aminomethane with the concentration of 0.01 to 0.1 M, tetrasodium iminodisuccinate with the concentration of 0.001 to 0.05 M, sodium ascorbate with the mass fraction of 0.05-1%, betaine with the mass fraction of 0.1-2%, Tween 20 with the mass fraction of 1-6%, sodium acetate with the concentration of 0.05 to 0.5 M, and isopropanol withthe mass fraction of 25-55%. The lysis binding solution does not contain toxic organic solvents such as phenol and does not contain reagents such as protease K needing cold-chain transportation, so that the RNA extraction kit can be transported under the condition of normal temperature. The lysis binding solution has the effects of lysis of cells / viruses and promotion of combination of nucleic acid and magnetic beads, can complete lysis and combination in one step, and is more suitable for an automatic nucleic acid extractor. The two protein denaturants are combined for use, and compared with single use of one protein denaturant, the capacity of removing impurities such as protein with complex chemical properties can be enhanced.
Owner:苏州赛普生物科技股份有限公司

Environment-friendly phosphorus-free chelating agent and preparation method thereof

The invention relates to the technical field of chelating agents, in particular to an environment-friendly phosphorus-free chelating agent and a preparation method thereof.The preparation method of the chelating agent comprises the following steps that sodium ethylenediamine diphenylacetate, tetrasodium iminodisuccinate and tetrasodium glutamate diacetate are prepared; tetrasodium iminodisuccinate and tetrasodium glutamate diacetate can well integrate iron, calcium and magnesium ions, have a stabilizing effect on hydrogen peroxide, do not replace a previous phosphorus-containing chelating agent with phosphorus, and reduce excessive phosphorus in sewage treatment, and have the beneficial effects that sodium gluconate has high-quality corrosion and scale inhibition effects, so that the stabilizing agent of the chelating agent is improved, and the stability of the chelating agent is improved; the environmental protection effect of the chelating agent can be improved due to corrosion and scale inhibition, citric acid is added, a chelate formed by citric acid and iron ions is low in solubility, a proper amount of ammonium salt is added to generate monoammonium citrate which is chelated with Fe < 3 + > and Fe < 2 + > ions, ammonium ferrous citrate and ammonium ferric citrate which are high in solubility are formed respectively, precipitates appear when rust is removed, and the effect of removing rust is achieved. The use effect of the chelating agent is improved.
Owner:宜城成雄织造有限公司

Chelated micro-fertilizer capable of killing insects and preparation method thereof

The chelating state micronutrient fertilizer with the insecticidal function comprises trace elements and chelating agents and also comprises botanical pesticides and dispersion agents; the chelating state micronutrient fertilizer is shaped like powder; chelating agents are selected from tetrasodium iminodisuccinate salt and or EDTA (Ethylene Diamine Tetraacetic Acid); the botanical pesticides comprise Cynanchum komarovii Al. extracts and also comprise Stellera chamaejasme extracts and Ageratina adenophora extracts. According to the chelating state micronutrient fertilizer with the insecticidal function, the trace elements are added, trace elements and other nutrients brought by a plant source which serves as the pesticides are contained, the trace elements and the other nutrients can be chelated into the chelating state micronutrient fertilizer, the botanical pesticides are also contained, and accordingly the formula is reasonable, the synergistic effect is obvious, the utilization rate of effective components is high, the pest killing effect is good through due to the double insecticidal mechanism for damaging protective enzyme systems and nervous systems of nematodes and the fumigation action of multiple ingredients, and the botanical pesticides are free of pest resistance. The invention also relates to a production method of the chelating state micronutrient fertilizer with the insecticidal function.
Owner:GUILIN JINSHENG BIOLOGICAL TECH

Microbial foliar fertilizer and preparation method thereof

The invention discloses a microbial foliar fertilizer and a preparation method thereof. A formula for the microbial foliar fertilizer comprises the following raw materials in parts by weight: 20-35 parts of animal dung biogas slurry, 1-3 parts of low-molecular-weight organic acid, 10-20 parts of sodium selenite, 0.1-0.5 part of ammonium molybdate, 60-80 parts of potassium fulvate, 1-5 parts of a microbial agent, 1-10 parts of zinc sulfate, 1-5 parts of boric acid, 1-5 parts of an accelerant, 80-100 parts of monopotassium phosphate, 0.5-1 part of manganese sulfate and 10-20 parts of calcium superphosphate, wherein the low-molecular organic acid is composed of diethylamine tetraacetic acid, oxaloacetic acid and citric acid according to a weight ratio of 1: (2-3): (1-1.5); the accelerant is composed of pullulan and tetrasodium iminodisuccinate according to a weight ratio of (0.5-1): (0.3-0.9); and the microbial agent is prepared from Bacillus licheniformis and Bacillus subtilis accordingto a weight ratio of 1: (0.5-0.9). The microbial foliar fertilizer has the double effects of promoting crop growth and preventing and treating plant foliar diseases, greatly reduces the use amount ofchemical fertilizers and pesticides, improves farmland environment quality, and enhances the quality of agricultural products.
Owner:徐州快邦生物科技开发有限公司

Crystalline self-repairing polymer cement-based waterproof material and preparation method thereof

The invention discloses a crystalline self-repairing polymer cement-based waterproof material and a preparation method thereof. The crystalline self-repairing polymer cement-based waterproof materialis prepared from the following raw materials in percentage by mass: 27 to 35 percent of Portland cement, 18 to 24 percent of quartz sand, 0.8 to 1 percent of vinyl silane coupling agent, 6 to 9.5 percent of an excitant, 0.2 to 0.5 percent of an ultraviolet light absorber and 30 to 48 percent of modified polyacrylate emulsion, the preparation method of the modified polyacrylate emulsion comprises the following steps: I, weighing; II, adding an acrylate monomer and methacrylic acid into ethanol, stirring and dissolving to obtain a solution A; III, adding sodium itaconate, sodium p-styrenesulfonate, tetrasodium iminodisuccinate and an initiator into deionized water, and stirring for dissolving to obtain a solution B; and IV, uniformly mixing the solution A and the solution B, transferring into a reaction kettle, and carrying out copolymerization reaction at 70-100 DEG C for 3-6 hours, thereby obtaining the product. According to the invention, structures such as -COONa and -SO3Na are introduced into a copolymer to form a copolymer emulsion with a chelating effect and an emulsifying and dispersing effect, so that a modified polyacrylate-concrete stably combined compact waterproof layeris formed.
Owner:安徽朗凯奇科技股份有限公司
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