39 results about "Potassium thiosulfate" patented technology

At least one of the following compounds is included on a surface layer of a print medium and in an inkjet ink formulation to be printed thereon: potassium iodide, sodium iodide, sodium thiosulfate, potassium thiosulfate, and sodium thiocyanate. The addition of at least one of these compounds to both the print medium and the inkjet ink can improve light fastness on the order of eight to thirteen times or more on porous glossy media. These additives are particularly effective with water-soluble dyes, including such dyes as Reactive Black 31 (Pacified) (RB31), Direct Blue 199 (DB199), Magenta 377 (M377), and Direct Yellow 132 (DY132).

The invention relates to a di-(2-hydroxyl isopropyl) benzene production method which mainly solves the problems of long technical process and excessive public project consumption in the prior art. The technical scheme for better solving the problems includes that diisopropylbenzene oxidant solution containing di-(hydrogen peroxide isopropyl) benzene is used as a raw material to obtain the di-(2-hydroxyl isopropyl) benzene by means of reaction of the di-(hydrogen peroxide isopropyl) benzene and reducing agent, wherein the reaction temperature is 40-200 DEG C, the reaction pressure is 0.2-1.0MPa, the reducing agent is selected from at least one of sodium thiosulfate , potassium thiosulfate, potassium sulfide, potassium hydrosulfide, sodium sulfide or sodium hydrosulfide, and the weight ratio of the di-(hydrogen peroxide isopropyl) benzene to the reducing agent is (1-30):(1-20). The di-(2-hydroxyl isopropyl) benzene production method can be used for industrial production of di-(2-hydroxyl isopropyl) benzene.

The invention relates to a method for improve lubricating oil lubricity and thermal conductivity by utilizing graphene oxide. The method comprises a step 1) of sequentially adding potassium thiosulfate, phosphorus pentoxide and concentrated sulphuric acid into a flask, dissolving the raw material at 80 DEG C, adding graphite powder, and performing stirring at 80 DEG C; after the reaction is over, adding deionized water, finally using the deionized water to perform suction filtration many times, and performing drying at 50 DEG C; a step 2) of adding a pre-oxidized product into concentrated sulphuric acid, slowly adding potassium permanganate under ice-bath, reacting at 35 DEG C, slowly adding deionized water, finally pouring the product into the flask, and then adding deionized water and hydrogen peroxide; a step 3) of performing acid pickling on the product through hydrochloric acid, and using a dialysis bag to perform dialysis in the deionized water; a step 4) of performing mixed reaction of graphene oxide, ethyl alcohol and octadecylamine, using the ethyl alcohol to perform suction filtration and cleaning, and obtaining a final product after drying. According to the method, the lubricating oil lubricity and thermal conductivity are improved, the whole process is simple to operate and safe, and the effect is good.

An efficient process for preparation of potassium thiosulfate (K2S2O3) is described. Potassium hydroxide (KOH) and elemental sulfur (S) are converted to potassium polysulfide, which is subsequently oxidized. The process allows using specifically designed process conditions such as mole ratios of potassium hydroxide to sulfur, and temperature, to obtain an optimized formulation of desired polysulfide, and a specifically designed set of conditions such as temperature, pressure, rate and duration of the oxidant during the oxidation conditions, to obtain a relatively high concentration of soluble potassium thiosulfate product with high purity, with relatively low amounts of byproducts. The manufacturing process can either be a batch process or a continuous process utilizing Continuous Stirred Tank Reactors (CSTR). The CSTR process is dependent on several design parameters, including pressure, and temperature optimization to avoid product instability. The resulting potassium thiosulfate is a beneficial fertilizer with high potassium content as a 50% liquid source of potassium.

The invention discloses a special drip irrigation fertilizer for potatoes containing a nitrification inhibitor. The special drip irrigation fertilizer is prepared from the following raw materials in parts by weight: 43-63 parts of urea, 9-15 parts of ammonium nitrate, 11-17 parts of monopotassium phosphate, 8-18 parts of nitrification inhibitor, 13-19 parts of reaction promoter, 7-13 parts of accessories and 4-8 parts of additive. A preparation method comprises the steps of raw material grinding, raw material mixing and stirring to obtain a finished product. The special drip irrigation fertilizer for potatoes containing a nitrification inhibitor contains multiple nutrients and can meet the need for multiple nutrients of potatoes; and since the raw materials of the drip irrigation fertilizer are added with potassium thiosulfate, plant growth regulator, herbicide and the like, by adopting the drip irrigation fertilizer in the potato cultivation process, the problem of heavy metal pollution of soil can be effectively solved, the planting environment can be improved, and the growth vigor of potatoes is enhanced.

The invention relates to the technical field of packaging paper, and particularly relates to a method for preparing waterproof cellophane. Emulsified paraffin and an acrylic acid monomer are subjectedto an emulsification reaction initiated by potassium thiosulfate to obtain modified emulsified liquid paraffin; bagasse is subjected to alkalization and yellowing to obtain cellulose viscose; after the cellulose viscose and the modified emulsified liquid paraffin are mixed and subjected to film drawing, a product is put into a coagulating bath and then taken out; and the product is subjected to water washing, alcohol washing and drying to obtain the waterproof cellophane. An esterification reaction allows distances among wood fibers to be reduced, thus improving waterproofness of the cellophane. The modified emulsified liquid paraffin has large bond energy and is a hydrophobic group, thus facilitating waterproofness improvement. Crosslinking occurs during film drawing because of the existence of acrylic acid so that compactness of the liquid paraffin that is a surface protective film of the viscose is improved and cellulose in the cellophane hardly absorbs water through the compact protective film, and therefore waterproofness of cellulose is improved and the cellophane has a wide application prospect.

An efficient process for preparation of potassium thiosulfate (K2S2O3) is described. Potassium hydroxide (KOH) and elemental sulfur (S) are converted to potassium polysulfide, which is subsequently oxidized. The process allows using specifically designed process conditions such as mole ratios of potassium hydroxide to sulfur, and temperature, to obtain an optimized formulation of desired polysulfide, and a specifically designed set of conditions such as temperature, pressure, rate and duration of the oxidant during the oxidation conditions, to obtain a relatively high concentration of soluble potassium thiosulfate product with high purity, with relatively low amounts of byproducts. The manufacturing process can either be a batch process or a continuous process utilizing Continuous Stirred Tank Reactors (CSTR). The CSTR process is dependent on several design parameters, including pressure, and temperature optimization to avoid product instability. The resulting potassium thiosulfate is a beneficial fertilizer with high potassium content as a 50% liquid source of potassium.

The invention relates to a process for preparing potassium thiosulfate, potassium sulfite or potassium bisulfite comprising the following steps:Step (1a): providing a potassium hydroxide or potassium carbonate solution for neutralizing acid forming components such as dissolving SO2 or H2S;Step (1b): providing an SO2 contacting solution, containing at least some potassium sulfite or potassium bisulfite or potassium thiosulfate;Step (2): providing SO2 gas;Step (3): reacting these to absorb the SO2 gas and to form an intermediate reaction mixture comprising potassium sulfite, or potassium bisulfite or a mixture thereof, and optionally recovering the potassium sulfite, or potassium bisulfite or a mixture thereof, and / or optionally using steps 4 and 5;Step (4): adding sulfur or sulfide containing compound containing sulfur having the oxidation state of 0, −2 or of between 0 and −2 to the reaction mixture and optionally potassium hydroxide or potassium carbonate, and reacting the mixture under suitable conditions to form potassium thiosulfate; andStep (5): recovering the potassium thiosulfate, and optionally concentrating the potassium thiosulfate.

The invention discloses a special drip irrigation fertilizer for hot pepper containing a urease inhibitor. The special drip irrigation fertilizer is prepared from the following raw materials in parts by weight: 41-61 parts of urease inhibitor, 7-13 parts of ammonium nitrate, 9-15 parts of monopotassium phosphate, 11-17 parts of reaction promoter, 5-11 parts of accessories and 2-6 parts of additive. A preparation method comprises the steps of raw material grinding, raw material mixing and stirring to obtain a finished product. The special drip irrigation fertilizer for hot pepper containing a urease inhibitor contains multiple nutrients and can meet the need for multiple nutrients of hot pepper; and since the raw materials of the drip irrigation fertilizer are added with potassium thiosulfate, plant growth regulator, herbicide and the like, by adopting the drip irrigation fertilizer in the hot pepper cultivation process, the problem of heavy metal pollution of soil can be effectively solved, the planting environment can be improved, and the growth vigor of hot pepper is enhanced.

The invention discloses elective etching solution of nickel or nickel alloy, and a preparation method and application thereof. The etching solution is prepared from the following ingredients in parts by weight: ferric trichloride, ferric trifluoroacetylacetonate, sulfamic acid, hexanedioic acid, gamma-3-aminopropyltriethoxysilane, potassium thiosulfate, hydrofluoric acid, imidazoline ammonium salt and deionized water. The etching solution provided by the invention has a proper etching speed for the nickel or nickel alloy, hardly corrodes copper, and is high in selectivity. In addition, an etched copper plate has a light surface, is free from sediments, is smooth and is free from lateral erosion.

The invention relates to a detection method of a lead ion. The method is characterized by comprising the steps of: adding a chloroauric acid water solution into deionized water, adding a cationic surfactant water solution under magnetic stirring, then slowly adding a newly prepared reductant water solution dropwisely, conducting magnetic stirring for 30min under room temperature, thus obtaining a surfactant modified Au nanoparticle detection liquid; taking two parts of the detection liquid in an equivalent amount; adding two parts of a thiosulfate water solution of an equivalent volume into the two detection liquids respectively, and shaking them uniformly so as to obtain a first mixed solution and a second mixed solution; adding ultrapure water and a solution to be detected in an equivalent volume into the first mixed solution and the second mixed solution respectively, mixing them well so as to form a third mixed solution and a fourth mixed solution; comparing the color change of the third mixed solution and the fourth mixed solution so as to determine whether existing a lead ion in the detected solution. The thiosulfate can be sodium hyposulfite or potassium thiosulfate. The method provided in the invention has the advantages of simple, convenient and rapid operation, low detection cost, small sampling amount and wide application scope.

The invention discloses an anti-pollution and easily-washable polyamide reverse osmosis composite membrane and a preparation method of the membrane. The method disclosed by the invention comprises the following steps: (1) sequentially washing a polyamide reverse osmosis composite membrane by using isopropanol and de-ionized water; (2) adding the washed polyamide reverse osmosis composite membrane, 4-(2-sulfoethyl)-1-(4-vinyl benzyl)pyridine glycine betaine, potassium thiosulfate, sodium hydrogen sulfite and de-ionized water into a container; introducing nitrogen and discharging oxygen in the container; and (3) sealing the container and carrying out reaction in a water bath. The method is simple and convenient, conditions are moderate and the environment-friendly effect is realized; the prepared anti-pollution and easily-washable polyamide reverse osmosis composite membrane has the strong anti-pollution capability; after being polluted, the surface of the membrane can be physically washed by changing the salt concentration of input water; an organic chemical washing agent is not needed; the durability of the membrane is improved; the cost is reduced and the service life of the membrane is prolonged.