6 results about "Potassium hydrogen phthalate" patented technology

The invention relates to an electrochemical test solution for detecting the corrosion resistance of a cold-rolled sheet pretreatment film and a detection method thereof, and belongs to the technical field of cold-rolled sheet surface treatment. An electrochemical test solution for detecting corrosion resistance of a cold-rolled sheet pretreatment film is prepared by mixing 5-8 g of sodium chloride, 0.5-1 g of calcium chloride, 0.4-0.7 g of potassium hydrogen phthalate, 0.2-0.5 g of sodium bicarbonate and 1 L of deionized water, and the electrochemical test solution is prepared by mixing 5-8 g of sodium chloride, 0.5-1 g of calcium chloride, 0.4-0.7 g of potassium hydrogen phthalate, 0.2-0.5 g of sodium bicarbonate and 1 L of deionized water. The electrochemical test solution provided by the invention is fixed in component, wide in applicability, small in damage to the film layer, low in test cost and simple to operate, can realize rapid quantitative evaluation on the corrosion resistance of the cold-rolled sheet surface pretreatment film, and has a very wide application prospect.

This utility model discloses a quantitative bottle for rapid weighing of potassium hydrogen phthalate with a fixed mass standard, belonging to the field of propellant analysis technology. It includes: a bottle body for containing powdered reagents; a cap connected to the bottle body's opening via threads; a control plate rotatably mounted on the upper surface of the cap, having multiple circumferentially distributed outlets of different sizes; and a slider radially slidable within the cap and in contact with the bottom surface of the control plate, the slider having multiple through-holes, each with a volume corresponding to a different standard weighing value. The rotation of the control plate switches the outlet combination state, allowing selective alignment of the multiple through-holes with the outlets during a single slide of the slider. This quantitative bottle for rapid weighing of potassium hydrogen phthalate with a fixed mass standard allows for various arrangements and combinations of the multiple through-holes and outlets, fulfilling diverse quantitative requirements.

This application relates to the field of environmental monitoring and water quality analysis technology, and in particular to a mixed reagent, test reagent tube, and digestion method for COD detection of petrochemical wastewater. The components, by mass percentage, are: sulfuric acid 75.0–90.0%, potassium dichromate 0.5–1.0%, silver sulfate 1.0–2.7%, scandium sulfate 0.01–0.07‰, potassium hydrogen phthalate 0.1–0.25‰, glucose 0.1–0.25‰, with the remainder being pure water; the mixed reagent does not contain mercuric sulfate. This application enables mercury-free and highly efficient digestion of high-salt, high-organic-content petrochemical wastewater, improves the oxidation efficiency of benzene compounds and polycyclic aromatic hydrocarbons, reduces the detection limit to below 5 mg / L, and the wastewater is easy to treat, combining high accuracy with environmental friendliness.

The invention discloses a micro-smoke type sulfur-free cycloalkane propellant which is prepared from the following components in parts by weight: 70 parts of an oxidizing agent, 34 parts of a combustible agent, 6 parts of an adhesive, 2 parts of a stabilizing agent, 2 parts of an anti-aging agent, 1 part of a catalyst and 2 parts of a smoke suppressor, the components are uniformly mixed according to a common method, and the oxidizing agent is prepared from potassium perchlorate, ammonium perchlorate and barium nitrate in a weight part ratio of 4: 9: 1; the combustible agent comprises smokeless charcoal, potassium hydrogen phthalate, nitrocellulose, 600-mesh purified terephthalic acid and hemp stalk carbon powder in a weight part ratio of 10: 4: 10: 5: 5; the adhesive adopts high-temperature-resistant phenolic resin; the stabilizing agent adopts calcium stearate; calcium phthalate is adopted as the anti-aging agent; basic cupric carbonate is adopted as the catalyst; the smoke suppressor adopts aluminum hydroxide. On the basis of keeping the advantages of the existing sulfur-free cycloalkane propellant, the smoke transmittance of the sulfur-free cycloalkane propellant is effectively improved.

The invention discloses a glucose zinc oxide attapulgite composite photocatalytic adsorbent and a preparation method thereof. The composite photocatalytic adsorbent comprises attapulgite, glucose, zinc oxide, an isopropanol solution, cobalt nitrate, potassium hydrogen phthalate, potassium hydroxide and sodium hydroxide. The preparation method comprises the following steps: adding acid-washed attapulgite and glucose into deionized water to form a suspension; transferring the suspension into a hydrothermal reaction kettle for reaction to obtain a solid product; the preparation method comprises the following steps: preparing a glucose carbon-attapulgite composite material, drying by a drying oven to obtain the glucose carbon-attapulgite composite material, loading a zinc oxide precursor solution on the glucose carbon-attapulgite composite material by an impregnation method, and calcining to obtain a final product. The method provided by the invention can effectively remove aldehyde ketone oxidation products, corrosive sulfides and metal ion compounds which cause color change of the oil product, enables the dark waste oil to recover to a colorless and transparent state, and also can efficiently remove acidic substances, significantly reduce the acid value of the oil product and improve the chemical stability of the oil product.

The application discloses a water-soluble dye functionalized potassium hydrogen phthalate nonlinear optical crystal and a preparation method and application thereof. The chemical formula of the potassium hydrogen phthalate crystal matrix is C8H5O4K, the water-soluble dye functionalized potassium hydrogen phthalate nonlinear optical crystal belongs to an orthorhombic system, a space group is Pca21, and the cell parameters are alpha = beta = gamma = 90 degrees. The crystal material has good third-order nonlinear optical performance and shows a significant saturated absorption effect. A large-size water-soluble dye functionalized potassium hydrogen phthalate nonlinear optical crystal is grown by using a constant-temperature evaporation method, and the preparation method has the advantages of simple operation, low cost, less pollution, low toxicity of raw materials, and short growth cycle. The water-soluble dye functionalized potassium hydrogen phthalate nonlinear optical crystal is not deliquescent in air, has stable physical and chemical properties, is easy to cut and polish, and is suitable for manufacturing nonlinear optical devices.