36 results about "Tripotassium citrate" patented technology

The present invention is a new non-cyanide alkaline copper plating bath, preparation and use method thereof. In the copper plating bath, using copper sulfate or basic copper carbonate as main salt, using hydroxy-ethylidene diphosphonic acid as main complexant, using trisodium citrate, potassium citrate or potassium sodium tartrate as auxiliary complexant, using sodium nitrate or potassium nitrate as conductive salt, using sodium hydroxide or potassium hydrate as pH value regulator; the operation conditions are: cathode current density is 0.5-3.0 A/dm [2], pH of plating bath controlled between 12 and 13, plating bath temperature is 50-70 DEG. Comparing with the prior known technology, the invention has following advantages or positive effects: simple plating bath formula, easy control and operation, wide temperature range of plating bath using, high current efficiency, fine crystallization coating, good appearance color, stable plating bath, strong uniform plating and covering ability, low cost, easy wastewater treatment. The invention can be used for pre copper plating or direct electro-coppering instead of virulent cyaniding electro-coppering process.

The invention discloses a preparation method for a ZnO nanosphere with a yolk-eggshell structure. The preparation method comprises the following steps of: preparing 500ml of mixed aqueous solution which contains 10mM of zinc nitrate, 5mM of hexamine and 2.5mM of tripotassium citrate; reacting the solution at the constant temperature of 75-95 DEG C for 20 minutes; aging at the temperature of 20-30 DEG C for 6-10 hours to obtain a precursor of a zinc citrate microsphere with a yolk-eggshell structure; calcining the citrate microsphere at the temperature of 500-800 DEG C for 2 hours; and naturally cooling to the room temperature to obtain the ZnO nanometer with the yolk-eggshell structure.

The invention relates to a preparation method of an edible and nutrient composite fruit-vegetable coating preservative. The method comprises the following steps: adding pectin into deionized water so as to prepare a pectin solution; adding whey protein into the deionized water so as to prepare a whey protein solution; mixing the pectin solution with the whey protein solution; stirring and emulsifying; adding a plasticizer, tripotassium citrate anhydrous and calcium propionate; stirring; and performing vacuum degassing so as to prepare the composite coating preservative. The method is simple, strong in operability and low in cost; and the coating preservative is rich in nutrition. A preservative film prepared from the coating preservative is good in stability, high in strength and good in water resistance and has a good effect for inhibiting spoilage microorganisms so as to prolong the shelf life of fruits and vegetables.

A method of making a rapid setting composition for cement boards is disclosed. Compositions including a hydraulic cement preferably portland cement, an alkali metal citrate such as tripotassium citrate, and a phosphate such as sodium trimetaphosphate, with optional gypsum, and no alkanolamine accelerant, and no fly ash based cement. An interaction between the alkali metal citrate and the phosphate increases the effectiveness of accelerating reactions of the portland cement without need for an alkanolamine accelerant, even in the presence of gypsum. This allows unexpected quick setting and increased early-age compressive strength without shrinkage in the cement board compositions.

The invention provides a preparation method of small-sized nanosilver for water-based conductive printing ink, and relates to the technical field of preparation of nanosilver. According to the preparation method provided by the invention, one of trisodium citrate, tripotassium citrate, carboxymethyl cellulose, sodium dodecyl sulfate and chitosan is added as a nucleation promoting stabilizer A, andone of polyglutamic acid, polyacrylic acid, polymethylacrylic acid, polyoxypropylene and polyacrylamide is added as a water-soluble organic protective agent B, so that caking of the nanosilver can beeffectively inhibited; nanosilver particles prepared through the preparation method are small in size and uniform in distribution, and the caking cannot be caused after long-term storage; the contentof an organic cladding agent on the surfaces of the nanosilver particles is less, and high conductivity can be realized; during preparation of the water-based conductive printing ink, the nanosilvercan be quickly and fully dispersed in a waterborne solvent, has excellent dispersity and can be applied to the technical field of ink jet printing.

A silver-coated copper powder obtained by coating the surface of a copper powder, which is obtained by the atomizing method or the like, with 5 wt % or more (with respect to the silver-coated copper powder) of a silver containing layer of silver or a silver compound, is added to a silver supporting solution of a potassium silver cyanide solution (or a potassium silver cyanide solution containing at least one selected from the group consisting of potassium pyrophosphate, boric acid, tripotassium citrate monohydrate, anhydrous citric acid and L-aspartic acid) to cause 0.01 wt % or more (with respect to the silver-coated copper powder) of silver to be supported on the surface of the copper powder coated with the silver containing layer.

The invention relates to a manufacturing method of low free chlorine gold salt. Potassium aurous cyanide, tripotassium citrate anhydrous and citric acid are dissolved in pure water at the temperature below 80 DEG C, oxidant is added in the solution while carbon monoxide is foamed, reaction solution is concentrated and cooled and crystal separated out therefrom is the low free chlorine gold salt represented by the general formula (1) which is of good solubility. When the low free chlorine gold salt is used for gold electroplating solution, an envelope with less free chlorine in an electroplating bath and excellent electroplating performance can be obtained. The low free chlorine gold salt can maintain low chlorine concentration, low partial corrosion of nickel and excellent welding flux characteristics when being used as gold salt for gold plating. The general formula (1) is shown in the specification.

The invention relates to the field of composite crop fertilizers, and in particular relates to a high-fertility sustained-release composite fertilizer special for sugarcane planting. The composite fertilizer is prepared from the following raw materials in parts by weight: 15-18 parts of wheat bran, 6-8 parts of black humic acid, 8-10 parts of humic acid, 10-12 parts of mushroom stem, 8-10 parts of agrocybe cylindracea stem, 12-15 parts of sorghum straw, 3-5 parts of decomposed coal, 5-6 parts of sweet potato powder, 25-30 parts of peat soil, 6-8 parts of cellulose ether, 4-5 parts of starch ether, 3-5 parts of sodium tetraborate, 1-2 parts of silicon oil, 0.1-0.2 part of taurine, 2-4 parts of glutamine, 1-3 parts of black alum, 0.2-0.3 part of Twain 80, 6-8 parts of cane shoot shell, 10-12 parts of potassium metabisulfite, 15-18 parts of waste kelp residue, 12-15 parts of citric acid tripotassium and 3-5 parts of additives. According to the composite fertilizer provided by the invention, organic carbonized powder with an adsorption property is mixed with an organic fermentation liquid, medium trace elements and additives, a function of immobilizing nutrients is achieved, a sustained-release fertilization effect is achieved through a sustained-release filming agent, and the composite fertilizer is long lasting and efficient in fertilizer efficiency, the absorption and utilization rate of crops on the nutrient is high, plants are thick and solid and high in sweetness, and the planting benefits are improved.

The invention discloses an environment-friendly electro-coppering liquid which is characterized by comprising a main binder, an auxiliary binder, a main salt, a conductive salt and a pH value conditioning agent, wherein the binder is disodium ethylene diamine tetraacetate or dipotassium ethylene diamine tetraacetate with a concentration of 100 to 150 g/L, the auxiliary binder is trisodium citrate, tripotassium citrate or potassium sodium tartrate with a concentration of 20 to 35 g/L, the main salt is copper sulphate or basic cupric carbonate with a concentration of 10 to 40 g/L, the conductive salt is sodium nitrate or potassium nitrate with a concentration of 5 to 10 g/L, and the pH value conditioning agent is sodium hydroxide or potassium hydroxide with a concentration of 25 to 50 g/L. The environment-friendly electro-coppering liquid provided by the invention has the following advantages: the electro-coppering liquid is a cyanide-free plating solution which is environment-friendly and nontoxic, easy to operate and maintain and applicable to direct electroplating on the surface of steel wires; the electro-coppering liquid has good polarization performance, high cathodic current efficiency and a wide density scope; and a coating formed by the liquid has good bonding force and is simple to maintain and low in cost.

The invention relates to an electroplating copper clad aluminum conductor. The electroplating copper clad aluminum conductor is provided with round aluminum and magnesium bodies. A conductor composed of a plurality of the round aluminum and magnesium bodies is provided with a round base core. An optical grating optical fiber with temperature measurement optical gratings carved on and a cooling channel soft copper pipe are arranged in the round base core. Optical grating temperature measuring points are formed on the optical grating optical fiber at predetermined intervals. The cooling channel soft copper pipe is a soft copper pipe with an insulation film wrapping layer and of the same length as the round aluminum and magnesium bodies. Tin layers are arranged on the external layers of the round aluminum and magnesium bodies. Copper plating liquid is electroplated between each round aluminum and magnesium body and each tin layer. The formula of the copper plating liquid consists of 30-50g/L of one type of copper nitrate, 100-150g/L of hydroxyl butyl diphosphonate, 1-5g/L of methylene phosphonic acid, 5-10g/L of tripotassium citrate, 0.01-0.05g/L of polyethyleneimine, 0.02-0.08g/L of phenylurea and the balance water.

The use for a whole muscle product of a preparation containing calcium hydroxide and/or calcium oxide, and trisodium citrate and/or tripotassium citrate in a specific ratio improves the hardness significantly, as well as the water retention and the bindability, providing no troubles in appearance, even without the addition of a phosphate or with a reduced amount of the addition of a phosphate, and the properties thereof are close to those obtained by using a phosphate. <??>The properties much closer to those obtained by using a phosphate are demonstrated by means of using a transglutaminase together with the preparation, resulting from the synergistic increase in hardness of the whole muscle product with an extremely small amount of the addition of a transglutaminase. Further, the increase, with time, in the viscosity of a pickle due to the transglutaminase is significantly prevented by controlling the pH of the pickle within a specific range.

There is provided a silver-coated copper powder, which has excellent storage stability (reliability), and a method for producing the same. A silver-coated copper powder obtained by coating the surface of a copper powder, which is obtained by the atomizing method or the like, with 5 wt % or more (with respect to the silver-coated copper powder) of a silver containing layer of silver or a silver compound, is added to a gold plating solution, which is a potassium gold cyanide solution (to which at least one of tripotassium citrate monohydrate, anhydrous citric acid and L-aspartic acid is preferably added), to cause 0.01 wt % or more (with respect to the silver-coated copper powder) of gold to be supported on the surface of the copper powder coated with the silver containing layer.

The invention discloses a cloth inspecting machine. The machine comprises a metal rotating shaft which is subjected to surface treatment, wherein the surface treatment comprises the following steps: 1) feeding 1 to 2 parts by mass of hydroxyethyl cellulose, 0.8 part by mass of tripotassium citrate anhydrous, 3.4 parts by mass of phosphoric acid, 0.9 part by mass of sodium hydrogenfluoride, 2.6 parts by mass of phosphono carboxylic acid, 1.7 parts by mass of 3-phenyl-2-propyl acrylate, and 2.6 parts by mass of dimethyl distearyl ammonium chloride to 13 parts by mass of deionized water, and uniformly stirring and mixing to obtain a surface treatment working solution; 2) heating the surface treatment working solution until the temperature is 54 DEG C; 3) soaking the metal rotating shaft in the surface treatment working solution for 33 minutes, and then moving out and drying the metal rotating shaft. According to the cloth inspecting machine, the metal rotating shaft is subjected to surface treatment, so that the cloth inspecting machine is outstanding in friction resistance, corrosion resistance, rustproofing performance, heat resistance, cold resistance and weather resistance.

The invention discloses a copper electroplating solution with a formula comprising 5-20 g/L of copper carbonate, 50-200 g/L of tripotassium citrate, 15-30 g/L of sodium nitrite, 5-10 g/L of potassium nitrate, 25-50 g/L of potassium hydroxide, 5-15 g/L of citric acid, and the balance being deionized water. According to the solution, the formula is reasonable, cyanogen-free and nontoxic formula is employed, production is safe without health influences on an operator, and a produced product has good quality.

The invention discloses a tinning solution. The tinning solution comprises, by weight, 20-50g/L of stannous chloride, 150-250g/L of hydrochloric acid, 5-10g/L of bismuth nitrate, 120-180g/L of complexing agent, 50-100g/L of stabilizer, 5-15g/L of brightener, and the rest of the tinning solution is deionized water. The complexing agent is an aqueous solution including hydroxy ethyl phosphonic acid, potassium citrate, and boric acid. The stabilizer is an aqueous solution including sodium phosphate and polyethylene glycol, and the stabilizer is a dilute solution including polyoxyethylene fatty alcohol ether and methanol. The tinning solution is reasonable in formula, stable in performance of the plating solution, capable of enabling products with a tin bismuth alloy coating not prone to bluing and growing whiskers, and good in weldability of products.

The invention discloses an indissolvable scale dispersing and unblocking system which is characterized in that a first slug is a cleaning solution and comprises diesel oil and limonene in a mass ratio of (6-10): 2; the first slug is a fatty alcohol-polyoxyethylene ether solution with the mass concentration of 2-6%, the second slug is a fatty alcohol-polyoxyethylene ether solution with the mass concentration of 0.4-0.6%, the third slug is a treating fluid with the mass concentration of 14-16%, and the treating fluid comprises the following components in parts by weight: 15-20 parts of phosphino hydrolytic polymaleic anhydride, 8-12 parts of potassium amino trimethylene phosphonate, 5-10 parts of tetrasodium glutamate diacetate, 2-6 parts of tripotassium citrate and 1-2 parts of sodium tartrate; and the fourth slug is a potassium chloride solution with the mass concentration of 0.8-1.2%. The invention discloses a use method of an indissolvable scale dispersing and unblocking system. The dispersion blocking remover has the beneficial effects that the permeation, stripping and dispersion capacities of the dispersion blocking remover for the insoluble scale are improved, efficient dispersion blocking removal is achieved, and the production level is improved.

The invention discloses a preparation method of an insect-proof willow-knitted suitcase. The preparation method comprises the following operation steps: (1) drying litsea pungens, negundo chastetree fruits, turnip seeds, scabrous elephantfoot herbs, floating leaf pondweed herbs, cortex ailanthi seu toonae and cortex periplocae, grinding, then performing reflux extraction by adopting ethanol, filtering, evaporating and removing the ethanol to prepare an extracting solution; (2) uniformly mixing an aqueous acrylic resin emulsion, the extracting solution, hydrogenated rosin glyceride, polyoxyethylene polyoxypropanolamine ether, tripotassium citrate and polyethanolamine to prepare an insect-proof coating; (3) uniformly brushing the surface of the willow-knitted suitcase with the insect-proof coating, then putting in a baking box and performing drying treatment to prepare a finished product. The preparation method of the insect-proof willow-knitted suitcase, disclosed by the invention, hasthe benefits that the operation is simple, the cost is low, and the prepared willow-knitted suitcase is good in stability and not only has unique fragrance, but also can effectively prevent the damageby insects, thereby prolonging the storage time of clothing.

The invention discloses steel wire copper preplating electroplating solution. The steel wire copper preplating electroplating solution comprises by weight, 150-200g/ L KCu2, 250-400g/ L% NaCN, 100-200g/ L KCNS, 25-50g/ L% complexing agent, 10-25g/ L% stabilizer and the balance water. The complexing agent is tripotassium citrate, and modifier is potassium hydroxide. According to the steel wire copper preplating electroplating solution, formulation is reasonable, corrosion resistance and tensile strength are good, the plating solution is environment friendly, pollution free and stable in property, and the produced products are high in quality.

An aqueous adjuvant concentrate can be prepared using a formulation including: a. from about 15 to about 45% by weight of a potassium salt chosen among di-potassium phosphate, potassium sulfate, potassium nitrate, tri-potassium citrate, potassium salts of ethylenediaminetetraacetic acid and mixture thereof; b. from about 0.5 to about 6% by weight of at least one surfactant and c. from about 3 to about 9% by weight of a hydroxypropyl tamarind gum wherein a, b, and c are dissolved into the aqueous adjuvant. The aqueous adjuvant can include other compounds such as ah herbicide.